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Diffstat (limited to 'gcc-4.2.1/gcc/ada/exp_dist.adb')
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diff --git a/gcc-4.2.1/gcc/ada/exp_dist.adb b/gcc-4.2.1/gcc/ada/exp_dist.adb new file mode 100644 index 000000000..666cd9d3b --- /dev/null +++ b/gcc-4.2.1/gcc/ada/exp_dist.adb @@ -0,0 +1,10877 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT COMPILER COMPONENTS -- +-- -- +-- E X P_ D I S T -- +-- -- +-- B o d y -- +-- -- +-- Copyright (C) 1992-2006, Free Software Foundation, Inc. -- +-- -- +-- GNAT is free software; you can redistribute it and/or modify it under -- +-- terms of the GNU General Public License as published by the Free Soft- -- +-- ware Foundation; either version 2, or (at your option) any later ver- -- +-- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- +-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- +-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -- +-- for more details. You should have received a copy of the GNU General -- +-- Public License distributed with GNAT; see file COPYING. If not, write -- +-- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, -- +-- Boston, MA 02110-1301, USA. -- +-- -- +-- GNAT was originally developed by the GNAT team at New York University. -- +-- Extensive contributions were provided by Ada Core Technologies Inc. -- +-- -- +------------------------------------------------------------------------------ + +with Atree; use Atree; +with Einfo; use Einfo; +with Elists; use Elists; +with Exp_Strm; use Exp_Strm; +with Exp_Tss; use Exp_Tss; +with Exp_Util; use Exp_Util; +with GNAT.HTable; use GNAT.HTable; +with Lib; use Lib; +with Namet; use Namet; +with Nlists; use Nlists; +with Nmake; use Nmake; +with Opt; use Opt; +with Rtsfind; use Rtsfind; +with Sem; use Sem; +with Sem_Ch3; use Sem_Ch3; +with Sem_Ch8; use Sem_Ch8; +with Sem_Dist; use Sem_Dist; +with Sem_Eval; use Sem_Eval; +with Sem_Util; use Sem_Util; +with Sinfo; use Sinfo; +with Snames; use Snames; +with Stand; use Stand; +with Stringt; use Stringt; +with Tbuild; use Tbuild; +with Ttypes; use Ttypes; +with Uintp; use Uintp; + +package body Exp_Dist is + + -- The following model has been used to implement distributed objects: + -- given a designated type D and a RACW type R, then a record of the + -- form: + + -- type Stub is tagged record + -- [...declaration similar to s-parint.ads RACW_Stub_Type...] + -- end record; + + -- is built. This type has two properties: + + -- 1) Since it has the same structure than RACW_Stub_Type, it can be + -- converted to and from this type to make it suitable for + -- System.Partition_Interface.Get_Unique_Remote_Pointer in order + -- to avoid memory leaks when the same remote object arrive on the + -- same partition through several paths; + + -- 2) It also has the same dispatching table as the designated type D, + -- and thus can be used as an object designated by a value of type + -- R on any partition other than the one on which the object has + -- been created, since only dispatching calls will be performed and + -- the fields themselves will not be used. We call Derive_Subprograms + -- to fake half a derivation to ensure that the subprograms do have + -- the same dispatching table. + + First_RCI_Subprogram_Id : constant := 2; + -- RCI subprograms are numbered starting at 2. The RCI receiver for + -- an RCI package can thus identify calls received through remote + -- access-to-subprogram dereferences by the fact that they have a + -- (primitive) subprogram id of 0, and 1 is used for the internal + -- RAS information lookup operation. (This is for the Garlic code + -- generation, where subprograms are identified by numbers; in the + -- PolyORB version, they are identified by name, with a numeric suffix + -- for homonyms.) + + type Hash_Index is range 0 .. 50; + + ----------------------- + -- Local subprograms -- + ----------------------- + + function Hash (F : Entity_Id) return Hash_Index; + -- DSA expansion associates stubs to distributed object types using + -- a hash table on entity ids. + + function Hash (F : Name_Id) return Hash_Index; + -- The generation of subprogram identifiers requires an overload counter + -- to be associated with each remote subprogram names. These counters + -- are maintained in a hash table on name ids. + + type Subprogram_Identifiers is record + Str_Identifier : String_Id; + Int_Identifier : Int; + end record; + + package Subprogram_Identifier_Table is + new Simple_HTable (Header_Num => Hash_Index, + Element => Subprogram_Identifiers, + No_Element => (No_String, 0), + Key => Entity_Id, + Hash => Hash, + Equal => "="); + -- Mapping between a remote subprogram and the corresponding + -- subprogram identifiers. + + package Overload_Counter_Table is + new Simple_HTable (Header_Num => Hash_Index, + Element => Int, + No_Element => 0, + Key => Name_Id, + Hash => Hash, + Equal => "="); + -- Mapping between a subprogram name and an integer that + -- counts the number of defining subprogram names with that + -- Name_Id encountered so far in a given context (an interface). + + function Get_Subprogram_Ids (Def : Entity_Id) return Subprogram_Identifiers; + function Get_Subprogram_Id (Def : Entity_Id) return String_Id; + function Get_Subprogram_Id (Def : Entity_Id) return Int; + -- Given a subprogram defined in a RCI package, get its distribution + -- subprogram identifiers (the distribution identifiers are a unique + -- subprogram number, and the non-qualified subprogram name, in the + -- casing used for the subprogram declaration; if the name is overloaded, + -- a double underscore and a serial number are appended. + -- + -- The integer identifier is used to perform remote calls with GARLIC; + -- the string identifier is used in the case of PolyORB. + -- + -- Although the PolyORB DSA receiving stubs will make a caseless comparison + -- when receiving a call, the calling stubs will create requests with the + -- exact casing of the defining unit name of the called subprogram, so as + -- to allow calls to subprograms on distributed nodes that do distinguish + -- between casings. + -- + -- NOTE: Another design would be to allow a representation clause on + -- subprogram specs: for Subp'Distribution_Identifier use "fooBar"; + + pragma Warnings (Off, Get_Subprogram_Id); + -- One homonym only is unreferenced (specific to the GARLIC version) + + procedure Add_RAS_Dereference_TSS (N : Node_Id); + -- Add a subprogram body for RAS Dereference TSS + + procedure Add_RAS_Proxy_And_Analyze + (Decls : List_Id; + Vis_Decl : Node_Id; + All_Calls_Remote_E : Entity_Id; + Proxy_Object_Addr : out Entity_Id); + -- Add the proxy type necessary to call the subprogram declared + -- by Vis_Decl through a remote access to subprogram type. + -- All_Calls_Remote_E must be Standard_True if a pragma All_Calls_Remote + -- applies, Standard_False otherwise. The new proxy type is appended + -- to Decls. Proxy_Object_Addr is a constant of type System.Address that + -- designates an instance of the proxy object. + + function Build_Remote_Subprogram_Proxy_Type + (Loc : Source_Ptr; + ACR_Expression : Node_Id) return Node_Id; + -- Build and return a tagged record type definition for an RCI + -- subprogram proxy type. + -- ACR_Expression is use as the initialization value for + -- the All_Calls_Remote component. + + function Build_Get_Unique_RP_Call + (Loc : Source_Ptr; + Pointer : Entity_Id; + Stub_Type : Entity_Id) return List_Id; + -- Build a call to Get_Unique_Remote_Pointer (Pointer), followed by a + -- tag fixup (Get_Unique_Remote_Pointer may have changed Pointer'Tag to + -- RACW_Stub_Type'Tag, while the desired tag is that of Stub_Type). + + function Build_Subprogram_Calling_Stubs + (Vis_Decl : Node_Id; + Subp_Id : Node_Id; + Asynchronous : Boolean; + Dynamically_Asynchronous : Boolean := False; + Stub_Type : Entity_Id := Empty; + RACW_Type : Entity_Id := Empty; + Locator : Entity_Id := Empty; + New_Name : Name_Id := No_Name) return Node_Id; + -- Build the calling stub for a given subprogram with the subprogram ID + -- being Subp_Id. If Stub_Type is given, then the "addr" field of + -- parameters of this type will be marshalled instead of the object + -- itself. It will then be converted into Stub_Type before performing + -- the real call. If Dynamically_Asynchronous is True, then it will be + -- computed at run time whether the call is asynchronous or not. + -- Otherwise, the value of the formal Asynchronous will be used. + -- If Locator is not Empty, it will be used instead of RCI_Cache. If + -- New_Name is given, then it will be used instead of the original name. + + function Build_RPC_Receiver_Specification + (RPC_Receiver : Entity_Id; + Request_Parameter : Entity_Id) return Node_Id; + -- Make a subprogram specification for an RPC receiver, with the given + -- defining unit name and formal parameter. + + function Build_Ordered_Parameters_List (Spec : Node_Id) return List_Id; + -- Return an ordered parameter list: unconstrained parameters are put + -- at the beginning of the list and constrained ones are put after. If + -- there are no parameters, an empty list is returned. Special case: + -- the controlling formal of the equivalent RACW operation for a RAS + -- type is always left in first position. + + procedure Add_Calling_Stubs_To_Declarations + (Pkg_Spec : Node_Id; + Decls : List_Id); + -- Add calling stubs to the declarative part + + function Could_Be_Asynchronous (Spec : Node_Id) return Boolean; + -- Return True if nothing prevents the program whose specification is + -- given to be asynchronous (i.e. no out parameter). + + function Pack_Entity_Into_Stream_Access + (Loc : Source_Ptr; + Stream : Node_Id; + Object : Entity_Id; + Etyp : Entity_Id := Empty) return Node_Id; + -- Pack Object (of type Etyp) into Stream. If Etyp is not given, + -- then Etype (Object) will be used if present. If the type is + -- constrained, then 'Write will be used to output the object, + -- If the type is unconstrained, 'Output will be used. + + function Pack_Node_Into_Stream + (Loc : Source_Ptr; + Stream : Entity_Id; + Object : Node_Id; + Etyp : Entity_Id) return Node_Id; + -- Similar to above, with an arbitrary node instead of an entity + + function Pack_Node_Into_Stream_Access + (Loc : Source_Ptr; + Stream : Node_Id; + Object : Node_Id; + Etyp : Entity_Id) return Node_Id; + -- Similar to above, with Stream instead of Stream'Access + + function Make_Selected_Component + (Loc : Source_Ptr; + Prefix : Entity_Id; + Selector_Name : Name_Id) return Node_Id; + -- Return a selected_component whose prefix denotes the given entity, + -- and with the given Selector_Name. + + function Scope_Of_Spec (Spec : Node_Id) return Entity_Id; + -- Return the scope represented by a given spec + + procedure Set_Renaming_TSS + (Typ : Entity_Id; + Nam : Entity_Id; + TSS_Nam : TSS_Name_Type); + -- Create a renaming declaration of subprogram Nam, + -- and register it as a TSS for Typ with name TSS_Nam. + + function Need_Extra_Constrained (Parameter : Node_Id) return Boolean; + -- Return True if the current parameter needs an extra formal to reflect + -- its constrained status. + + function Is_RACW_Controlling_Formal + (Parameter : Node_Id; + Stub_Type : Entity_Id) return Boolean; + -- Return True if the current parameter is a controlling formal argument + -- of type Stub_Type or access to Stub_Type. + + procedure Declare_Create_NVList + (Loc : Source_Ptr; + NVList : Entity_Id; + Decls : List_Id; + Stmts : List_Id); + -- Append the declaration of NVList to Decls, and its + -- initialization to Stmts. + + function Add_Parameter_To_NVList + (Loc : Source_Ptr; + NVList : Entity_Id; + Parameter : Entity_Id; + Constrained : Boolean; + RACW_Ctrl : Boolean := False; + Any : Entity_Id) return Node_Id; + -- Return a call to Add_Item to add the Any corresponding + -- to the designated formal Parameter (with the indicated + -- Constrained status) to NVList. RACW_Ctrl must be set to + -- True for controlling formals of distributed object primitive + -- operations. + + type Stub_Structure is record + Stub_Type : Entity_Id; + Stub_Type_Access : Entity_Id; + RPC_Receiver_Decl : Node_Id; + RACW_Type : Entity_Id; + end record; + -- This structure is necessary because of the two phases analysis of + -- a RACW declaration occurring in the same Remote_Types package as the + -- designated type. RACW_Type is any of the RACW types pointing on this + -- designated type, it is used here to save an anonymous type creation + -- for each primitive operation. + -- + -- For a RACW that implements a RAS, no object RPC receiver is generated. + -- Instead, RPC_Receiver_Decl is the declaration after which the + -- RPC receiver would have been inserted. + + Empty_Stub_Structure : constant Stub_Structure := + (Empty, Empty, Empty, Empty); + + package Stubs_Table is + new Simple_HTable (Header_Num => Hash_Index, + Element => Stub_Structure, + No_Element => Empty_Stub_Structure, + Key => Entity_Id, + Hash => Hash, + Equal => "="); + -- Mapping between a RACW designated type and its stub type + + package Asynchronous_Flags_Table is + new Simple_HTable (Header_Num => Hash_Index, + Element => Entity_Id, + No_Element => Empty, + Key => Entity_Id, + Hash => Hash, + Equal => "="); + -- Mapping between a RACW type and a constant having the value True + -- if the RACW is asynchronous and False otherwise. + + package RCI_Locator_Table is + new Simple_HTable (Header_Num => Hash_Index, + Element => Entity_Id, + No_Element => Empty, + Key => Entity_Id, + Hash => Hash, + Equal => "="); + -- Mapping between a RCI package on which All_Calls_Remote applies and + -- the generic instantiation of RCI_Locator for this package. + + package RCI_Calling_Stubs_Table is + new Simple_HTable (Header_Num => Hash_Index, + Element => Entity_Id, + No_Element => Empty, + Key => Entity_Id, + Hash => Hash, + Equal => "="); + -- Mapping between a RCI subprogram and the corresponding calling stubs + + procedure Add_Stub_Type + (Designated_Type : Entity_Id; + RACW_Type : Entity_Id; + Decls : List_Id; + Stub_Type : out Entity_Id; + Stub_Type_Access : out Entity_Id; + RPC_Receiver_Decl : out Node_Id; + Existing : out Boolean); + -- Add the declaration of the stub type, the access to stub type and the + -- object RPC receiver at the end of Decls. If these already exist, + -- then nothing is added in the tree but the right values are returned + -- anyhow and Existing is set to True. + + procedure Add_RACW_Asynchronous_Flag + (Declarations : List_Id; + RACW_Type : Entity_Id); + -- Declare a boolean constant associated with RACW_Type whose value + -- indicates at run time whether a pragma Asynchronous applies to it. + + procedure Assign_Subprogram_Identifier + (Def : Entity_Id; + Spn : Int; + Id : out String_Id); + -- Determine the distribution subprogram identifier to + -- be used for remote subprogram Def, return it in Id and + -- store it in a hash table for later retrieval by + -- Get_Subprogram_Id. Spn is the subprogram number. + + function RCI_Package_Locator + (Loc : Source_Ptr; + Package_Spec : Node_Id) return Node_Id; + -- Instantiate the generic package RCI_Locator in order to locate the + -- RCI package whose spec is given as argument. + + function Make_Tag_Check (Loc : Source_Ptr; N : Node_Id) return Node_Id; + -- Surround a node N by a tag check, as in: + -- begin + -- <N>; + -- exception + -- when E : Ada.Tags.Tag_Error => + -- Raise_Exception (Program_Error'Identity, + -- Exception_Message (E)); + -- end; + + function Input_With_Tag_Check + (Loc : Source_Ptr; + Var_Type : Entity_Id; + Stream : Node_Id) return Node_Id; + -- Return a function with the following form: + -- function R return Var_Type is + -- begin + -- return Var_Type'Input (S); + -- exception + -- when E : Ada.Tags.Tag_Error => + -- Raise_Exception (Program_Error'Identity, + -- Exception_Message (E)); + -- end R; + + -------------------------------------------- + -- Hooks for PCS-specific code generation -- + -------------------------------------------- + + -- Part of the code generation circuitry for distribution needs to be + -- tailored for each implementation of the PCS. For each routine that + -- needs to be specialized, a Specific_<routine> wrapper is created, + -- which calls the corresponding <routine> in package + -- <pcs_implementation>_Support. + + procedure Specific_Add_RACW_Features + (RACW_Type : Entity_Id; + Desig : Entity_Id; + Stub_Type : Entity_Id; + Stub_Type_Access : Entity_Id; + RPC_Receiver_Decl : Node_Id; + Declarations : List_Id); + -- Add declaration for TSSs for a given RACW type. The declarations are + -- added just after the declaration of the RACW type itself, while the + -- bodies are inserted at the end of Decls. Runtime-specific ancillary + -- subprogram for Add_RACW_Features. + + procedure Specific_Add_RAST_Features + (Vis_Decl : Node_Id; + RAS_Type : Entity_Id); + -- Add declaration for TSSs for a given RAS type. PCS-specific ancillary + -- subprogram for Add_RAST_Features. + + -- An RPC_Target record is used during construction of calling stubs + -- to pass PCS-specific tree fragments corresponding to the information + -- necessary to locate the target of a remote subprogram call. + + type RPC_Target (PCS_Kind : PCS_Names) is record + case PCS_Kind is + when Name_PolyORB_DSA => + Object : Node_Id; + -- An expression whose value is a PolyORB reference to the target + -- object. + when others => + Partition : Entity_Id; + -- A variable containing the Partition_ID of the target parition + + RPC_Receiver : Node_Id; + -- An expression whose value is the address of the target RPC + -- receiver. + end case; + end record; + + procedure Specific_Build_General_Calling_Stubs + (Decls : List_Id; + Statements : List_Id; + Target : RPC_Target; + Subprogram_Id : Node_Id; + Asynchronous : Node_Id := Empty; + Is_Known_Asynchronous : Boolean := False; + Is_Known_Non_Asynchronous : Boolean := False; + Is_Function : Boolean; + Spec : Node_Id; + Stub_Type : Entity_Id := Empty; + RACW_Type : Entity_Id := Empty; + Nod : Node_Id); + -- Build calling stubs for general purpose. The parameters are: + -- Decls : a place to put declarations + -- Statements : a place to put statements + -- Target : PCS-specific target information (see details + -- in RPC_Target declaration). + -- Subprogram_Id : a node containing the subprogram ID + -- Asynchronous : True if an APC must be made instead of an RPC. + -- The value needs not be supplied if one of the + -- Is_Known_... is True. + -- Is_Known_Async... : True if we know that this is asynchronous + -- Is_Known_Non_A... : True if we know that this is not asynchronous + -- Spec : a node with a Parameter_Specifications and + -- a Result_Definition if applicable + -- Stub_Type : in case of RACW stubs, parameters of type access + -- to Stub_Type will be marshalled using the + -- address of the object (the addr field) rather + -- than using the 'Write on the stub itself + -- Nod : used to provide sloc for generated code + + function Specific_Build_Stub_Target + (Loc : Source_Ptr; + Decls : List_Id; + RCI_Locator : Entity_Id; + Controlling_Parameter : Entity_Id) return RPC_Target; + -- Build call target information nodes for use within calling stubs. In the + -- RCI case, RCI_Locator is the entity for the instance of RCI_Locator. If + -- for an RACW, Controlling_Parameter is the entity for the controlling + -- formal parameter used to determine the location of the target of the + -- call. Decls provides a location where variable declarations can be + -- appended to construct the necessary values. + + procedure Specific_Build_Stub_Type + (RACW_Type : Entity_Id; + Stub_Type : Entity_Id; + Stub_Type_Decl : out Node_Id; + RPC_Receiver_Decl : out Node_Id); + -- Build a type declaration for the stub type associated with an RACW + -- type, and the necessary RPC receiver, if applicable. PCS-specific + -- ancillary subprogram for Add_Stub_Type. If no RPC receiver declaration + -- is generated, then RPC_Receiver_Decl is set to Empty. + + procedure Specific_Build_RPC_Receiver_Body + (RPC_Receiver : Entity_Id; + Request : out Entity_Id; + Subp_Id : out Entity_Id; + Subp_Index : out Entity_Id; + Stmts : out List_Id; + Decl : out Node_Id); + -- Make a subprogram body for an RPC receiver, with the given + -- defining unit name. On return: + -- - Subp_Id is the subprogram identifier from the PCS. + -- - Subp_Index is the index in the list of subprograms + -- used for dispatching (a variable of type Subprogram_Id). + -- - Stmts is the place where the request dispatching + -- statements can occur, + -- - Decl is the subprogram body declaration. + + function Specific_Build_Subprogram_Receiving_Stubs + (Vis_Decl : Node_Id; + Asynchronous : Boolean; + Dynamically_Asynchronous : Boolean := False; + Stub_Type : Entity_Id := Empty; + RACW_Type : Entity_Id := Empty; + Parent_Primitive : Entity_Id := Empty) return Node_Id; + -- Build the receiving stub for a given subprogram. The subprogram + -- declaration is also built by this procedure, and the value returned + -- is a N_Subprogram_Body. If a parameter of type access to Stub_Type is + -- found in the specification, then its address is read from the stream + -- instead of the object itself and converted into an access to + -- class-wide type before doing the real call using any of the RACW type + -- pointing on the designated type. + + procedure Specific_Add_Obj_RPC_Receiver_Completion + (Loc : Source_Ptr; + Decls : List_Id; + RPC_Receiver : Entity_Id; + Stub_Elements : Stub_Structure); + -- Add the necessary code to Decls after the completion of generation + -- of the RACW RPC receiver described by Stub_Elements. + + procedure Specific_Add_Receiving_Stubs_To_Declarations + (Pkg_Spec : Node_Id; + Decls : List_Id); + -- Add receiving stubs to the declarative part of an RCI unit + + package GARLIC_Support is + + -- Support for generating DSA code that uses the GARLIC PCS + + -- The subprograms below provide the GARLIC versions of + -- the corresponding Specific_<subprogram> routine declared + -- above. + + procedure Add_RACW_Features + (RACW_Type : Entity_Id; + Stub_Type : Entity_Id; + Stub_Type_Access : Entity_Id; + RPC_Receiver_Decl : Node_Id; + Declarations : List_Id); + + procedure Add_RAST_Features + (Vis_Decl : Node_Id; + RAS_Type : Entity_Id); + + procedure Build_General_Calling_Stubs + (Decls : List_Id; + Statements : List_Id; + Target_Partition : Entity_Id; -- From RPC_Target + Target_RPC_Receiver : Node_Id; -- From RPC_Target + Subprogram_Id : Node_Id; + Asynchronous : Node_Id := Empty; + Is_Known_Asynchronous : Boolean := False; + Is_Known_Non_Asynchronous : Boolean := False; + Is_Function : Boolean; + Spec : Node_Id; + Stub_Type : Entity_Id := Empty; + RACW_Type : Entity_Id := Empty; + Nod : Node_Id); + + function Build_Stub_Target + (Loc : Source_Ptr; + Decls : List_Id; + RCI_Locator : Entity_Id; + Controlling_Parameter : Entity_Id) return RPC_Target; + + procedure Build_Stub_Type + (RACW_Type : Entity_Id; + Stub_Type : Entity_Id; + Stub_Type_Decl : out Node_Id; + RPC_Receiver_Decl : out Node_Id); + + function Build_Subprogram_Receiving_Stubs + (Vis_Decl : Node_Id; + Asynchronous : Boolean; + Dynamically_Asynchronous : Boolean := False; + Stub_Type : Entity_Id := Empty; + RACW_Type : Entity_Id := Empty; + Parent_Primitive : Entity_Id := Empty) return Node_Id; + + procedure Add_Obj_RPC_Receiver_Completion + (Loc : Source_Ptr; + Decls : List_Id; + RPC_Receiver : Entity_Id; + Stub_Elements : Stub_Structure); + + procedure Add_Receiving_Stubs_To_Declarations + (Pkg_Spec : Node_Id; + Decls : List_Id); + + procedure Build_RPC_Receiver_Body + (RPC_Receiver : Entity_Id; + Request : out Entity_Id; + Subp_Id : out Entity_Id; + Subp_Index : out Entity_Id; + Stmts : out List_Id; + Decl : out Node_Id); + + end GARLIC_Support; + + package PolyORB_Support is + + -- Support for generating DSA code that uses the PolyORB PCS + + -- The subprograms below provide the PolyORB versions of + -- the corresponding Specific_<subprogram> routine declared + -- above. + + procedure Add_RACW_Features + (RACW_Type : Entity_Id; + Desig : Entity_Id; + Stub_Type : Entity_Id; + Stub_Type_Access : Entity_Id; + RPC_Receiver_Decl : Node_Id; + Declarations : List_Id); + + procedure Add_RAST_Features + (Vis_Decl : Node_Id; + RAS_Type : Entity_Id); + + procedure Build_General_Calling_Stubs + (Decls : List_Id; + Statements : List_Id; + Target_Object : Node_Id; -- From RPC_Target + Subprogram_Id : Node_Id; + Asynchronous : Node_Id := Empty; + Is_Known_Asynchronous : Boolean := False; + Is_Known_Non_Asynchronous : Boolean := False; + Is_Function : Boolean; + Spec : Node_Id; + Stub_Type : Entity_Id := Empty; + RACW_Type : Entity_Id := Empty; + Nod : Node_Id); + + function Build_Stub_Target + (Loc : Source_Ptr; + Decls : List_Id; + RCI_Locator : Entity_Id; + Controlling_Parameter : Entity_Id) return RPC_Target; + + procedure Build_Stub_Type + (RACW_Type : Entity_Id; + Stub_Type : Entity_Id; + Stub_Type_Decl : out Node_Id; + RPC_Receiver_Decl : out Node_Id); + + function Build_Subprogram_Receiving_Stubs + (Vis_Decl : Node_Id; + Asynchronous : Boolean; + Dynamically_Asynchronous : Boolean := False; + Stub_Type : Entity_Id := Empty; + RACW_Type : Entity_Id := Empty; + Parent_Primitive : Entity_Id := Empty) return Node_Id; + + procedure Add_Obj_RPC_Receiver_Completion + (Loc : Source_Ptr; + Decls : List_Id; + RPC_Receiver : Entity_Id; + Stub_Elements : Stub_Structure); + + procedure Add_Receiving_Stubs_To_Declarations + (Pkg_Spec : Node_Id; + Decls : List_Id); + + procedure Build_RPC_Receiver_Body + (RPC_Receiver : Entity_Id; + Request : out Entity_Id; + Subp_Id : out Entity_Id; + Subp_Index : out Entity_Id; + Stmts : out List_Id; + Decl : out Node_Id); + + procedure Reserve_NamingContext_Methods; + -- Mark the method names for interface NamingContext as already used in + -- the overload table, so no clashes occur with user code (with the + -- PolyORB PCS, RCIs Implement The NamingContext interface to allow + -- their methods to be accessed as objects, for the implementation of + -- remote access-to-subprogram types). + + package Helpers is + + -- Routines to build distribtion helper subprograms for user-defined + -- types. For implementation of the Distributed systems annex (DSA) + -- over the PolyORB generic middleware components, it is necessary to + -- generate several supporting subprograms for each application data + -- type used in inter-partition communication. These subprograms are: + -- * a Typecode function returning a high-level description of the + -- type's structure; + -- * two conversion functions allowing conversion of values of the + -- type from and to the generic data containers used by PolyORB. + -- These generic containers are called 'Any' type values after + -- the CORBA terminology, and hence the conversion subprograms + -- are named To_Any and From_Any. + + function Build_From_Any_Call + (Typ : Entity_Id; + N : Node_Id; + Decls : List_Id) return Node_Id; + -- Build call to From_Any attribute function of type Typ with + -- expression N as actual parameter. Decls is the declarations list + -- for an appropriate enclosing scope of the point where the call + -- will be inserted; if the From_Any attribute for Typ needs to be + -- generated at this point, its declaration is appended to Decls. + + procedure Build_From_Any_Function + (Loc : Source_Ptr; + Typ : Entity_Id; + Decl : out Node_Id; + Fnam : out Entity_Id); + -- Build From_Any attribute function for Typ. Loc is the reference + -- location for generated nodes, Typ is the type for which the + -- conversion function is generated. On return, Decl and Fnam contain + -- the declaration and entity for the newly-created function. + + function Build_To_Any_Call + (N : Node_Id; + Decls : List_Id) return Node_Id; + -- Build call to To_Any attribute function with expression as actual + -- parameter. Decls is the declarations list for an appropriate + -- enclosing scope of the point where the call will be inserted; if + -- the To_Any attribute for Typ needs to be generated at this point, + -- its declaration is appended to Decls. + + procedure Build_To_Any_Function + (Loc : Source_Ptr; + Typ : Entity_Id; + Decl : out Node_Id; + Fnam : out Entity_Id); + -- Build To_Any attribute function for Typ. Loc is the reference + -- location for generated nodes, Typ is the type for which the + -- conversion function is generated. On return, Decl and Fnam contain + -- the declaration and entity for the newly-created function. + + function Build_TypeCode_Call + (Loc : Source_Ptr; + Typ : Entity_Id; + Decls : List_Id) return Node_Id; + -- Build call to TypeCode attribute function for Typ. Decls is the + -- declarations list for an appropriate enclosing scope of the point + -- where the call will be inserted; if the To_Any attribute for Typ + -- needs to be generated at this point, its declaration is appended + -- to Decls. + + procedure Build_TypeCode_Function + (Loc : Source_Ptr; + Typ : Entity_Id; + Decl : out Node_Id; + Fnam : out Entity_Id); + -- Build TypeCode attribute function for Typ. Loc is the reference + -- location for generated nodes, Typ is the type for which the + -- conversion function is generated. On return, Decl and Fnam contain + -- the declaration and entity for the newly-created function. + + procedure Build_Name_And_Repository_Id + (E : Entity_Id; + Name_Str : out String_Id; + Repo_Id_Str : out String_Id); + -- In the PolyORB distribution model, each distributed object type + -- and each distributed operation has a globally unique identifier, + -- its Repository Id. This subprogram builds and returns two strings + -- for entity E (a distributed object type or operation): one + -- containing the name of E, the second containing its repository id. + + end Helpers; + + end PolyORB_Support; + + ------------------------------------ + -- Local variables and structures -- + ------------------------------------ + + RCI_Cache : Node_Id; + -- Needs comments ??? + + Output_From_Constrained : constant array (Boolean) of Name_Id := + (False => Name_Output, + True => Name_Write); + -- The attribute to choose depending on the fact that the parameter + -- is constrained or not. There is no such thing as Input_From_Constrained + -- since this require separate mechanisms ('Input is a function while + -- 'Read is a procedure). + + --------------------------------------- + -- Add_Calling_Stubs_To_Declarations -- + --------------------------------------- + + procedure Add_Calling_Stubs_To_Declarations + (Pkg_Spec : Node_Id; + Decls : List_Id) + is + Current_Subprogram_Number : Int := First_RCI_Subprogram_Id; + -- Subprogram id 0 is reserved for calls received from + -- remote access-to-subprogram dereferences. + + Current_Declaration : Node_Id; + Loc : constant Source_Ptr := Sloc (Pkg_Spec); + RCI_Instantiation : Node_Id; + Subp_Stubs : Node_Id; + Subp_Str : String_Id; + + begin + -- The first thing added is an instantiation of the generic package + -- System.Partition_Interface.RCI_Locator with the name of this + -- remote package. This will act as an interface with the name server + -- to determine the Partition_ID and the RPC_Receiver for the + -- receiver of this package. + + RCI_Instantiation := RCI_Package_Locator (Loc, Pkg_Spec); + RCI_Cache := Defining_Unit_Name (RCI_Instantiation); + + Append_To (Decls, RCI_Instantiation); + Analyze (RCI_Instantiation); + + -- For each subprogram declaration visible in the spec, we do + -- build a body. We also increment a counter to assign a different + -- Subprogram_Id to each subprograms. The receiving stubs processing + -- do use the same mechanism and will thus assign the same Id and + -- do the correct dispatching. + + Overload_Counter_Table.Reset; + PolyORB_Support.Reserve_NamingContext_Methods; + + Current_Declaration := First (Visible_Declarations (Pkg_Spec)); + + while Present (Current_Declaration) loop + if Nkind (Current_Declaration) = N_Subprogram_Declaration + and then Comes_From_Source (Current_Declaration) + then + Assign_Subprogram_Identifier ( + Defining_Unit_Name (Specification (Current_Declaration)), + Current_Subprogram_Number, + Subp_Str); + + Subp_Stubs := + Build_Subprogram_Calling_Stubs ( + Vis_Decl => Current_Declaration, + Subp_Id => + Build_Subprogram_Id (Loc, + Defining_Unit_Name (Specification (Current_Declaration))), + Asynchronous => + Nkind (Specification (Current_Declaration)) = + N_Procedure_Specification + and then + Is_Asynchronous (Defining_Unit_Name (Specification + (Current_Declaration)))); + + Append_To (Decls, Subp_Stubs); + Analyze (Subp_Stubs); + + Current_Subprogram_Number := Current_Subprogram_Number + 1; + end if; + + Next (Current_Declaration); + end loop; + end Add_Calling_Stubs_To_Declarations; + + ----------------------------- + -- Add_Parameter_To_NVList -- + ----------------------------- + + function Add_Parameter_To_NVList + (Loc : Source_Ptr; + NVList : Entity_Id; + Parameter : Entity_Id; + Constrained : Boolean; + RACW_Ctrl : Boolean := False; + Any : Entity_Id) return Node_Id + is + Parameter_Name_String : String_Id; + Parameter_Mode : Node_Id; + + function Parameter_Passing_Mode + (Loc : Source_Ptr; + Parameter : Entity_Id; + Constrained : Boolean) return Node_Id; + -- Return an expression that denotes the parameter passing + -- mode to be used for Parameter in distribution stubs, + -- where Constrained is Parameter's constrained status. + + ---------------------------- + -- Parameter_Passing_Mode -- + ---------------------------- + + function Parameter_Passing_Mode + (Loc : Source_Ptr; + Parameter : Entity_Id; + Constrained : Boolean) return Node_Id + is + Lib_RE : RE_Id; + + begin + if Out_Present (Parameter) then + if In_Present (Parameter) + or else not Constrained + then + -- Unconstrained formals must be translated + -- to 'in' or 'inout', not 'out', because + -- they need to be constrained by the actual. + + Lib_RE := RE_Mode_Inout; + else + Lib_RE := RE_Mode_Out; + end if; + + else + Lib_RE := RE_Mode_In; + end if; + + return New_Occurrence_Of (RTE (Lib_RE), Loc); + end Parameter_Passing_Mode; + + -- Start of processing for Add_Parameter_To_NVList + + begin + if Nkind (Parameter) = N_Defining_Identifier then + Get_Name_String (Chars (Parameter)); + else + Get_Name_String (Chars (Defining_Identifier + (Parameter))); + end if; + + Parameter_Name_String := String_From_Name_Buffer; + + if RACW_Ctrl then + Parameter_Mode := New_Occurrence_Of + (RTE (RE_Mode_In), Loc); + else + Parameter_Mode := Parameter_Passing_Mode (Loc, + Parameter, Constrained); + end if; + + return + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of + (RTE (RE_NVList_Add_Item), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (NVList, Loc), + Make_Function_Call (Loc, + Name => + New_Occurrence_Of + (RTE (RE_To_PolyORB_String), Loc), + Parameter_Associations => New_List ( + Make_String_Literal (Loc, + Strval => Parameter_Name_String))), + New_Occurrence_Of (Any, Loc), + Parameter_Mode)); + end Add_Parameter_To_NVList; + + -------------------------------- + -- Add_RACW_Asynchronous_Flag -- + -------------------------------- + + procedure Add_RACW_Asynchronous_Flag + (Declarations : List_Id; + RACW_Type : Entity_Id) + is + Loc : constant Source_Ptr := Sloc (RACW_Type); + + Asynchronous_Flag : constant Entity_Id := + Make_Defining_Identifier (Loc, + New_External_Name (Chars (RACW_Type), 'A')); + + begin + -- Declare the asynchronous flag. This flag will be changed to True + -- whenever it is known that the RACW type is asynchronous. + + Append_To (Declarations, + Make_Object_Declaration (Loc, + Defining_Identifier => Asynchronous_Flag, + Constant_Present => True, + Object_Definition => New_Occurrence_Of (Standard_Boolean, Loc), + Expression => New_Occurrence_Of (Standard_False, Loc))); + + Asynchronous_Flags_Table.Set (RACW_Type, Asynchronous_Flag); + end Add_RACW_Asynchronous_Flag; + + ----------------------- + -- Add_RACW_Features -- + ----------------------- + + procedure Add_RACW_Features (RACW_Type : Entity_Id) + is + Desig : constant Entity_Id := + Etype (Designated_Type (RACW_Type)); + Decls : List_Id := + List_Containing (Declaration_Node (RACW_Type)); + + Same_Scope : constant Boolean := + Scope (Desig) = Scope (RACW_Type); + + Stub_Type : Entity_Id; + Stub_Type_Access : Entity_Id; + RPC_Receiver_Decl : Node_Id; + Existing : Boolean; + + begin + if not Expander_Active then + return; + end if; + + if Same_Scope then + + -- We are declaring a RACW in the same package than its designated + -- type, so the list to use for late declarations must be the + -- private part of the package. We do know that this private part + -- exists since the designated type has to be a private one. + + Decls := Private_Declarations + (Package_Specification_Of_Scope (Current_Scope)); + + elsif Nkind (Parent (Decls)) = N_Package_Specification + and then Present (Private_Declarations (Parent (Decls))) + then + Decls := Private_Declarations (Parent (Decls)); + end if; + + -- If we were unable to find the declarations, that means that the + -- completion of the type was missing. We can safely return and let + -- the error be caught by the semantic analysis. + + if No (Decls) then + return; + end if; + + Add_Stub_Type + (Designated_Type => Desig, + RACW_Type => RACW_Type, + Decls => Decls, + Stub_Type => Stub_Type, + Stub_Type_Access => Stub_Type_Access, + RPC_Receiver_Decl => RPC_Receiver_Decl, + Existing => Existing); + + Add_RACW_Asynchronous_Flag + (Declarations => Decls, + RACW_Type => RACW_Type); + + Specific_Add_RACW_Features + (RACW_Type => RACW_Type, + Desig => Desig, + Stub_Type => Stub_Type, + Stub_Type_Access => Stub_Type_Access, + RPC_Receiver_Decl => RPC_Receiver_Decl, + Declarations => Decls); + + if not Same_Scope and then not Existing then + + -- The RACW has been declared in another scope than the designated + -- type and has not been handled by another RACW in the same package + -- as the first one, so add primitive for the stub type here. + + Add_RACW_Primitive_Declarations_And_Bodies + (Designated_Type => Desig, + Insertion_Node => RPC_Receiver_Decl, + Decls => Decls); + + else + Add_Access_Type_To_Process (E => Desig, A => RACW_Type); + end if; + end Add_RACW_Features; + + ------------------------------------------------ + -- Add_RACW_Primitive_Declarations_And_Bodies -- + ------------------------------------------------ + + procedure Add_RACW_Primitive_Declarations_And_Bodies + (Designated_Type : Entity_Id; + Insertion_Node : Node_Id; + Decls : List_Id) + is + -- Set Sloc of generated declaration copy of insertion node Sloc, so + -- the declarations are recognized as belonging to the current package. + + Loc : constant Source_Ptr := Sloc (Insertion_Node); + + Stub_Elements : constant Stub_Structure := + Stubs_Table.Get (Designated_Type); + + pragma Assert (Stub_Elements /= Empty_Stub_Structure); + Is_RAS : constant Boolean := + not Comes_From_Source (Stub_Elements.RACW_Type); + + Current_Insertion_Node : Node_Id := Insertion_Node; + + RPC_Receiver : Entity_Id; + RPC_Receiver_Statements : List_Id; + RPC_Receiver_Case_Alternatives : constant List_Id := New_List; + RPC_Receiver_Elsif_Parts : List_Id; + RPC_Receiver_Request : Entity_Id; + RPC_Receiver_Subp_Id : Entity_Id; + RPC_Receiver_Subp_Index : Entity_Id; + + Subp_Str : String_Id; + + Current_Primitive_Elmt : Elmt_Id; + Current_Primitive : Entity_Id; + Current_Primitive_Body : Node_Id; + Current_Primitive_Spec : Node_Id; + Current_Primitive_Decl : Node_Id; + Current_Primitive_Number : Int := 0; + + Current_Primitive_Alias : Node_Id; + + Current_Receiver : Entity_Id; + Current_Receiver_Body : Node_Id; + + RPC_Receiver_Decl : Node_Id; + + Possibly_Asynchronous : Boolean; + + begin + if not Expander_Active then + return; + end if; + + if not Is_RAS then + RPC_Receiver := Make_Defining_Identifier (Loc, + New_Internal_Name ('P')); + Specific_Build_RPC_Receiver_Body ( + RPC_Receiver => RPC_Receiver, + Request => RPC_Receiver_Request, + Subp_Id => RPC_Receiver_Subp_Id, + Subp_Index => RPC_Receiver_Subp_Index, + Stmts => RPC_Receiver_Statements, + Decl => RPC_Receiver_Decl); + + if Get_PCS_Name = Name_PolyORB_DSA then + + -- For the case of PolyORB, we need to map a textual operation + -- name into a primitive index. Currently we do so using a + -- simple sequence of string comparisons. + + RPC_Receiver_Elsif_Parts := New_List; + end if; + end if; + + -- Build callers, receivers for every primitive operations and a RPC + -- receiver for this type. + + if Present (Primitive_Operations (Designated_Type)) then + Overload_Counter_Table.Reset; + + Current_Primitive_Elmt := + First_Elmt (Primitive_Operations (Designated_Type)); + while Current_Primitive_Elmt /= No_Elmt loop + Current_Primitive := Node (Current_Primitive_Elmt); + + -- Copy the primitive of all the parents, except predefined + -- ones that are not remotely dispatching. + + if Chars (Current_Primitive) /= Name_uSize + and then Chars (Current_Primitive) /= Name_uAlignment + and then not Is_TSS (Current_Primitive, TSS_Deep_Finalize) + then + -- The first thing to do is build an up-to-date copy of + -- the spec with all the formals referencing Designated_Type + -- transformed into formals referencing Stub_Type. Since this + -- primitive may have been inherited, go back the alias chain + -- until the real primitive has been found. + + Current_Primitive_Alias := Current_Primitive; + while Present (Alias (Current_Primitive_Alias)) loop + pragma Assert + (Current_Primitive_Alias + /= Alias (Current_Primitive_Alias)); + Current_Primitive_Alias := Alias (Current_Primitive_Alias); + end loop; + + Current_Primitive_Spec := + Copy_Specification (Loc, + Spec => Parent (Current_Primitive_Alias), + Object_Type => Designated_Type, + Stub_Type => Stub_Elements.Stub_Type); + + Current_Primitive_Decl := + Make_Subprogram_Declaration (Loc, + Specification => Current_Primitive_Spec); + + Insert_After (Current_Insertion_Node, Current_Primitive_Decl); + Analyze (Current_Primitive_Decl); + Current_Insertion_Node := Current_Primitive_Decl; + + Possibly_Asynchronous := + Nkind (Current_Primitive_Spec) = N_Procedure_Specification + and then Could_Be_Asynchronous (Current_Primitive_Spec); + + Assign_Subprogram_Identifier ( + Defining_Unit_Name (Current_Primitive_Spec), + Current_Primitive_Number, + Subp_Str); + + Current_Primitive_Body := + Build_Subprogram_Calling_Stubs + (Vis_Decl => Current_Primitive_Decl, + Subp_Id => + Build_Subprogram_Id (Loc, + Defining_Unit_Name (Current_Primitive_Spec)), + Asynchronous => Possibly_Asynchronous, + Dynamically_Asynchronous => Possibly_Asynchronous, + Stub_Type => Stub_Elements.Stub_Type, + RACW_Type => Stub_Elements.RACW_Type); + Append_To (Decls, Current_Primitive_Body); + + -- Analyzing the body here would cause the Stub type to be + -- frozen, thus preventing subsequent primitive declarations. + -- For this reason, it will be analyzed later in the + -- regular flow. + + -- Build the receiver stubs + + if not Is_RAS then + Current_Receiver_Body := + Specific_Build_Subprogram_Receiving_Stubs + (Vis_Decl => Current_Primitive_Decl, + Asynchronous => Possibly_Asynchronous, + Dynamically_Asynchronous => Possibly_Asynchronous, + Stub_Type => Stub_Elements.Stub_Type, + RACW_Type => Stub_Elements.RACW_Type, + Parent_Primitive => Current_Primitive); + + Current_Receiver := Defining_Unit_Name ( + Specification (Current_Receiver_Body)); + + Append_To (Decls, Current_Receiver_Body); + + -- Add a case alternative to the receiver + + if Get_PCS_Name = Name_PolyORB_DSA then + Append_To (RPC_Receiver_Elsif_Parts, + Make_Elsif_Part (Loc, + Condition => + Make_Function_Call (Loc, + Name => + New_Occurrence_Of ( + RTE (RE_Caseless_String_Eq), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (RPC_Receiver_Subp_Id, Loc), + Make_String_Literal (Loc, Subp_Str))), + Then_Statements => New_List ( + Make_Assignment_Statement (Loc, + Name => New_Occurrence_Of ( + RPC_Receiver_Subp_Index, Loc), + Expression => + Make_Integer_Literal (Loc, + Current_Primitive_Number))))); + end if; + + Append_To (RPC_Receiver_Case_Alternatives, + Make_Case_Statement_Alternative (Loc, + Discrete_Choices => New_List ( + Make_Integer_Literal (Loc, Current_Primitive_Number)), + + Statements => New_List ( + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (Current_Receiver, Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (RPC_Receiver_Request, Loc)))))); + end if; + + -- Increment the index of current primitive + + Current_Primitive_Number := Current_Primitive_Number + 1; + end if; + + Next_Elmt (Current_Primitive_Elmt); + end loop; + end if; + + -- Build the case statement and the heart of the subprogram + + if not Is_RAS then + if Get_PCS_Name = Name_PolyORB_DSA + and then Present (First (RPC_Receiver_Elsif_Parts)) + then + Append_To (RPC_Receiver_Statements, + Make_Implicit_If_Statement (Designated_Type, + Condition => New_Occurrence_Of (Standard_False, Loc), + Then_Statements => New_List, + Elsif_Parts => RPC_Receiver_Elsif_Parts)); + end if; + + Append_To (RPC_Receiver_Case_Alternatives, + Make_Case_Statement_Alternative (Loc, + Discrete_Choices => New_List (Make_Others_Choice (Loc)), + Statements => New_List (Make_Null_Statement (Loc)))); + + Append_To (RPC_Receiver_Statements, + Make_Case_Statement (Loc, + Expression => + New_Occurrence_Of (RPC_Receiver_Subp_Index, Loc), + Alternatives => RPC_Receiver_Case_Alternatives)); + + Append_To (Decls, RPC_Receiver_Decl); + Specific_Add_Obj_RPC_Receiver_Completion (Loc, + Decls, RPC_Receiver, Stub_Elements); + end if; + + -- Do not analyze RPC receiver at this stage since it will otherwise + -- reference subprograms that have not been analyzed yet. It will + -- be analyzed in the regular flow. + + end Add_RACW_Primitive_Declarations_And_Bodies; + + ----------------------------- + -- Add_RAS_Dereference_TSS -- + ----------------------------- + + procedure Add_RAS_Dereference_TSS (N : Node_Id) is + Loc : constant Source_Ptr := Sloc (N); + + Type_Def : constant Node_Id := Type_Definition (N); + + RAS_Type : constant Entity_Id := Defining_Identifier (N); + Fat_Type : constant Entity_Id := Equivalent_Type (RAS_Type); + RACW_Type : constant Entity_Id := Underlying_RACW_Type (RAS_Type); + Desig : constant Entity_Id := Etype (Designated_Type (RACW_Type)); + + Stub_Elements : constant Stub_Structure := Stubs_Table.Get (Desig); + pragma Assert (Stub_Elements /= Empty_Stub_Structure); + + RACW_Primitive_Name : Node_Id; + + Proc : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => Make_TSS_Name (RAS_Type, TSS_RAS_Dereference)); + + Proc_Spec : Node_Id; + Param_Specs : List_Id; + Param_Assoc : constant List_Id := New_List; + Stmts : constant List_Id := New_List; + + RAS_Parameter : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => New_Internal_Name ('P')); + + Is_Function : constant Boolean := + Nkind (Type_Def) = N_Access_Function_Definition; + + Is_Degenerate : Boolean; + -- Set to True if the subprogram_specification for this RAS has + -- an anonymous access parameter (see Process_Remote_AST_Declaration). + + Spec : constant Node_Id := Type_Def; + + Current_Parameter : Node_Id; + + -- Start of processing for Add_RAS_Dereference_TSS + + begin + -- The Dereference TSS for a remote access-to-subprogram type + -- has the form: + + -- [function|procedure] ras_typeRD (RAS_Value, <RAS_Parameters>) + -- [return <>] + + -- This is called whenever a value of a RAS type is dereferenced + + -- First construct a list of parameter specifications: + + -- The first formal is the RAS values + + Param_Specs := New_List ( + Make_Parameter_Specification (Loc, + Defining_Identifier => RAS_Parameter, + In_Present => True, + Parameter_Type => + New_Occurrence_Of (Fat_Type, Loc))); + + -- The following formals are copied from the type declaration + + Is_Degenerate := False; + Current_Parameter := First (Parameter_Specifications (Type_Def)); + Parameters : while Present (Current_Parameter) loop + if Nkind (Parameter_Type (Current_Parameter)) + = N_Access_Definition + then + Is_Degenerate := True; + end if; + Append_To (Param_Specs, + Make_Parameter_Specification (Loc, + Defining_Identifier => + Make_Defining_Identifier (Loc, + Chars => Chars (Defining_Identifier (Current_Parameter))), + In_Present => In_Present (Current_Parameter), + Out_Present => Out_Present (Current_Parameter), + Parameter_Type => + New_Copy_Tree (Parameter_Type (Current_Parameter)), + Expression => + New_Copy_Tree (Expression (Current_Parameter)))); + + Append_To (Param_Assoc, + Make_Identifier (Loc, + Chars => Chars (Defining_Identifier (Current_Parameter)))); + + Next (Current_Parameter); + end loop Parameters; + + if Is_Degenerate then + Prepend_To (Param_Assoc, New_Occurrence_Of (RAS_Parameter, Loc)); + + -- Generate a dummy body. This code will never actually be executed, + -- because null is the only legal value for a degenerate RAS type. + -- For legality's sake (in order to avoid generating a function + -- that does not contain a return statement), we include a dummy + -- recursive call on the TSS itself. + + Append_To (Stmts, + Make_Raise_Program_Error (Loc, Reason => PE_Explicit_Raise)); + RACW_Primitive_Name := New_Occurrence_Of (Proc, Loc); + + else + -- For a normal RAS type, we cast the RAS formal to the corresponding + -- tagged type, and perform a dispatching call to its Call + -- primitive operation. + + Prepend_To (Param_Assoc, + Unchecked_Convert_To (RACW_Type, + New_Occurrence_Of (RAS_Parameter, Loc))); + + RACW_Primitive_Name := Make_Selected_Component (Loc, + Prefix => Scope (RACW_Type), + Selector_Name => Name_Call); + end if; + + if Is_Function then + Append_To (Stmts, + Make_Return_Statement (Loc, + Expression => + Make_Function_Call (Loc, + Name => + RACW_Primitive_Name, + Parameter_Associations => Param_Assoc))); + + else + Append_To (Stmts, + Make_Procedure_Call_Statement (Loc, + Name => + RACW_Primitive_Name, + Parameter_Associations => Param_Assoc)); + end if; + + -- Build the complete subprogram + + if Is_Function then + Proc_Spec := + Make_Function_Specification (Loc, + Defining_Unit_Name => Proc, + Parameter_Specifications => Param_Specs, + Result_Definition => + New_Occurrence_Of ( + Entity (Result_Definition (Spec)), Loc)); + + Set_Ekind (Proc, E_Function); + Set_Etype (Proc, + New_Occurrence_Of (Entity (Result_Definition (Spec)), Loc)); + + else + Proc_Spec := + Make_Procedure_Specification (Loc, + Defining_Unit_Name => Proc, + Parameter_Specifications => Param_Specs); + + Set_Ekind (Proc, E_Procedure); + Set_Etype (Proc, Standard_Void_Type); + end if; + + Discard_Node ( + Make_Subprogram_Body (Loc, + Specification => Proc_Spec, + Declarations => New_List, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => Stmts))); + + Set_TSS (Fat_Type, Proc); + end Add_RAS_Dereference_TSS; + + ------------------------------- + -- Add_RAS_Proxy_And_Analyze -- + ------------------------------- + + procedure Add_RAS_Proxy_And_Analyze + (Decls : List_Id; + Vis_Decl : Node_Id; + All_Calls_Remote_E : Entity_Id; + Proxy_Object_Addr : out Entity_Id) + is + Loc : constant Source_Ptr := Sloc (Vis_Decl); + + Subp_Name : constant Entity_Id := + Defining_Unit_Name (Specification (Vis_Decl)); + + Pkg_Name : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => + New_External_Name (Chars (Subp_Name), 'P', -1)); + + Proxy_Type : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => + New_External_Name ( + Related_Id => Chars (Subp_Name), + Suffix => 'P')); + + Proxy_Type_Full_View : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars (Proxy_Type)); + + Subp_Decl_Spec : constant Node_Id := + Build_RAS_Primitive_Specification + (Subp_Spec => Specification (Vis_Decl), + Remote_Object_Type => Proxy_Type); + + Subp_Body_Spec : constant Node_Id := + Build_RAS_Primitive_Specification + (Subp_Spec => Specification (Vis_Decl), + Remote_Object_Type => Proxy_Type); + + Vis_Decls : constant List_Id := New_List; + Pvt_Decls : constant List_Id := New_List; + Actuals : constant List_Id := New_List; + Formal : Node_Id; + Perform_Call : Node_Id; + + begin + -- type subpP is tagged limited private; + + Append_To (Vis_Decls, + Make_Private_Type_Declaration (Loc, + Defining_Identifier => Proxy_Type, + Tagged_Present => True, + Limited_Present => True)); + + -- [subprogram] Call + -- (Self : access subpP; + -- ...other-formals...) + -- [return T]; + + Append_To (Vis_Decls, + Make_Subprogram_Declaration (Loc, + Specification => Subp_Decl_Spec)); + + -- A : constant System.Address; + + Proxy_Object_Addr := Make_Defining_Identifier (Loc, Name_uA); + + Append_To (Vis_Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => + Proxy_Object_Addr, + Constant_Present => + True, + Object_Definition => + New_Occurrence_Of (RTE (RE_Address), Loc))); + + -- private + + -- type subpP is tagged limited record + -- All_Calls_Remote : Boolean := [All_Calls_Remote?]; + -- ... + -- end record; + + Append_To (Pvt_Decls, + Make_Full_Type_Declaration (Loc, + Defining_Identifier => + Proxy_Type_Full_View, + Type_Definition => + Build_Remote_Subprogram_Proxy_Type (Loc, + New_Occurrence_Of (All_Calls_Remote_E, Loc)))); + + -- Trick semantic analysis into swapping the public and + -- full view when freezing the public view. + + Set_Comes_From_Source (Proxy_Type_Full_View, True); + + -- procedure Call + -- (Self : access O; + -- ...other-formals...) is + -- begin + -- P (...other-formals...); + -- end Call; + + -- function Call + -- (Self : access O; + -- ...other-formals...) + -- return T is + -- begin + -- return F (...other-formals...); + -- end Call; + + if Nkind (Subp_Decl_Spec) = N_Procedure_Specification then + Perform_Call := + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (Subp_Name, Loc), + Parameter_Associations => + Actuals); + else + Perform_Call := + Make_Return_Statement (Loc, + Expression => + Make_Function_Call (Loc, + Name => + New_Occurrence_Of (Subp_Name, Loc), + Parameter_Associations => + Actuals)); + end if; + + Formal := First (Parameter_Specifications (Subp_Decl_Spec)); + pragma Assert (Present (Formal)); + loop + Next (Formal); + exit when No (Formal); + Append_To (Actuals, + New_Occurrence_Of (Defining_Identifier (Formal), Loc)); + end loop; + + -- O : aliased subpP; + + Append_To (Pvt_Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => + Make_Defining_Identifier (Loc, + Name_uO), + Aliased_Present => + True, + Object_Definition => + New_Occurrence_Of (Proxy_Type, Loc))); + + -- A : constant System.Address := O'Address; + + Append_To (Pvt_Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => + Make_Defining_Identifier (Loc, + Chars (Proxy_Object_Addr)), + Constant_Present => + True, + Object_Definition => + New_Occurrence_Of (RTE (RE_Address), Loc), + Expression => + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of ( + Defining_Identifier (Last (Pvt_Decls)), Loc), + Attribute_Name => + Name_Address))); + + Append_To (Decls, + Make_Package_Declaration (Loc, + Specification => Make_Package_Specification (Loc, + Defining_Unit_Name => Pkg_Name, + Visible_Declarations => Vis_Decls, + Private_Declarations => Pvt_Decls, + End_Label => Empty))); + Analyze (Last (Decls)); + + Append_To (Decls, + Make_Package_Body (Loc, + Defining_Unit_Name => + Make_Defining_Identifier (Loc, + Chars (Pkg_Name)), + Declarations => New_List ( + Make_Subprogram_Body (Loc, + Specification => + Subp_Body_Spec, + Declarations => New_List, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => New_List (Perform_Call)))))); + Analyze (Last (Decls)); + end Add_RAS_Proxy_And_Analyze; + + ----------------------- + -- Add_RAST_Features -- + ----------------------- + + procedure Add_RAST_Features (Vis_Decl : Node_Id) is + RAS_Type : constant Entity_Id := + Equivalent_Type (Defining_Identifier (Vis_Decl)); + begin + pragma Assert (No (TSS (RAS_Type, TSS_RAS_Access))); + Add_RAS_Dereference_TSS (Vis_Decl); + Specific_Add_RAST_Features (Vis_Decl, RAS_Type); + end Add_RAST_Features; + + ------------------- + -- Add_Stub_Type -- + ------------------- + + procedure Add_Stub_Type + (Designated_Type : Entity_Id; + RACW_Type : Entity_Id; + Decls : List_Id; + Stub_Type : out Entity_Id; + Stub_Type_Access : out Entity_Id; + RPC_Receiver_Decl : out Node_Id; + Existing : out Boolean) + is + Loc : constant Source_Ptr := Sloc (RACW_Type); + + Stub_Elements : constant Stub_Structure := + Stubs_Table.Get (Designated_Type); + Stub_Type_Decl : Node_Id; + Stub_Type_Access_Decl : Node_Id; + + begin + if Stub_Elements /= Empty_Stub_Structure then + Stub_Type := Stub_Elements.Stub_Type; + Stub_Type_Access := Stub_Elements.Stub_Type_Access; + RPC_Receiver_Decl := Stub_Elements.RPC_Receiver_Decl; + Existing := True; + return; + end if; + + Existing := False; + Stub_Type := + Make_Defining_Identifier (Loc, New_Internal_Name ('S')); + Stub_Type_Access := + Make_Defining_Identifier (Loc, + New_External_Name ( + Related_Id => Chars (Stub_Type), + Suffix => 'A')); + + Specific_Build_Stub_Type ( + RACW_Type, Stub_Type, + Stub_Type_Decl, RPC_Receiver_Decl); + + Stub_Type_Access_Decl := + Make_Full_Type_Declaration (Loc, + Defining_Identifier => Stub_Type_Access, + Type_Definition => + Make_Access_To_Object_Definition (Loc, + All_Present => True, + Subtype_Indication => New_Occurrence_Of (Stub_Type, Loc))); + + Append_To (Decls, Stub_Type_Decl); + Analyze (Last (Decls)); + Append_To (Decls, Stub_Type_Access_Decl); + Analyze (Last (Decls)); + + -- This is in no way a type derivation, but we fake it to make + -- sure that the dispatching table gets built with the corresponding + -- primitive operations at the right place. + + Derive_Subprograms (Parent_Type => Designated_Type, + Derived_Type => Stub_Type); + + if Present (RPC_Receiver_Decl) then + Append_To (Decls, RPC_Receiver_Decl); + else + RPC_Receiver_Decl := Last (Decls); + end if; + + Stubs_Table.Set (Designated_Type, + (Stub_Type => Stub_Type, + Stub_Type_Access => Stub_Type_Access, + RPC_Receiver_Decl => RPC_Receiver_Decl, + RACW_Type => RACW_Type)); + end Add_Stub_Type; + + ---------------------------------- + -- Assign_Subprogram_Identifier -- + ---------------------------------- + + procedure Assign_Subprogram_Identifier + (Def : Entity_Id; + Spn : Int; + Id : out String_Id) + is + N : constant Name_Id := Chars (Def); + + Overload_Order : constant Int := + Overload_Counter_Table.Get (N) + 1; + + begin + Overload_Counter_Table.Set (N, Overload_Order); + + Get_Name_String (N); + + -- Homonym handling: as in Exp_Dbug, but much simpler, + -- because the only entities for which we have to generate + -- names here need only to be disambiguated within their + -- own scope. + + if Overload_Order > 1 then + Name_Buffer (Name_Len + 1 .. Name_Len + 2) := "__"; + Name_Len := Name_Len + 2; + Add_Nat_To_Name_Buffer (Overload_Order); + end if; + + Id := String_From_Name_Buffer; + Subprogram_Identifier_Table.Set (Def, + Subprogram_Identifiers'(Str_Identifier => Id, Int_Identifier => Spn)); + end Assign_Subprogram_Identifier; + + ------------------------------ + -- Build_Get_Unique_RP_Call -- + ------------------------------ + + function Build_Get_Unique_RP_Call + (Loc : Source_Ptr; + Pointer : Entity_Id; + Stub_Type : Entity_Id) return List_Id + is + begin + return New_List ( + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (RTE (RE_Get_Unique_Remote_Pointer), Loc), + Parameter_Associations => New_List ( + Unchecked_Convert_To (RTE (RE_RACW_Stub_Type_Access), + New_Occurrence_Of (Pointer, Loc)))), + + Make_Assignment_Statement (Loc, + Name => + Make_Selected_Component (Loc, + Prefix => + New_Occurrence_Of (Pointer, Loc), + Selector_Name => + New_Occurrence_Of (First_Tag_Component + (Designated_Type (Etype (Pointer))), Loc)), + Expression => + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Stub_Type, Loc), + Attribute_Name => + Name_Tag))); + + -- Note: The assignment to Pointer._Tag is safe here because + -- we carefully ensured that Stub_Type has exactly the same layout + -- as System.Partition_Interface.RACW_Stub_Type. + + end Build_Get_Unique_RP_Call; + + ----------------------------------- + -- Build_Ordered_Parameters_List -- + ----------------------------------- + + function Build_Ordered_Parameters_List (Spec : Node_Id) return List_Id is + Constrained_List : List_Id; + Unconstrained_List : List_Id; + Current_Parameter : Node_Id; + + First_Parameter : Node_Id; + For_RAS : Boolean := False; + + begin + if No (Parameter_Specifications (Spec)) then + return New_List; + end if; + + Constrained_List := New_List; + Unconstrained_List := New_List; + First_Parameter := First (Parameter_Specifications (Spec)); + + if Nkind (Parameter_Type (First_Parameter)) = N_Access_Definition + and then Chars (Defining_Identifier (First_Parameter)) = Name_uS + then + For_RAS := True; + end if; + + -- Loop through the parameters and add them to the right list + + Current_Parameter := First_Parameter; + while Present (Current_Parameter) loop + if (Nkind (Parameter_Type (Current_Parameter)) = N_Access_Definition + or else + Is_Constrained (Etype (Parameter_Type (Current_Parameter))) + or else + Is_Elementary_Type (Etype (Parameter_Type (Current_Parameter)))) + and then not (For_RAS and then Current_Parameter = First_Parameter) + then + Append_To (Constrained_List, New_Copy (Current_Parameter)); + else + Append_To (Unconstrained_List, New_Copy (Current_Parameter)); + end if; + + Next (Current_Parameter); + end loop; + + -- Unconstrained parameters are returned first + + Append_List_To (Unconstrained_List, Constrained_List); + + return Unconstrained_List; + end Build_Ordered_Parameters_List; + + ---------------------------------- + -- Build_Passive_Partition_Stub -- + ---------------------------------- + + procedure Build_Passive_Partition_Stub (U : Node_Id) is + Pkg_Spec : Node_Id; + Pkg_Name : String_Id; + L : List_Id; + Reg : Node_Id; + Loc : constant Source_Ptr := Sloc (U); + + begin + -- Verify that the implementation supports distribution, by accessing + -- a type defined in the proper version of system.rpc + + declare + Dist_OK : Entity_Id; + pragma Warnings (Off, Dist_OK); + begin + Dist_OK := RTE (RE_Params_Stream_Type); + end; + + -- Use body if present, spec otherwise + + if Nkind (U) = N_Package_Declaration then + Pkg_Spec := Specification (U); + L := Visible_Declarations (Pkg_Spec); + else + Pkg_Spec := Parent (Corresponding_Spec (U)); + L := Declarations (U); + end if; + + Get_Library_Unit_Name_String (Pkg_Spec); + Pkg_Name := String_From_Name_Buffer; + Reg := + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (RTE (RE_Register_Passive_Package), Loc), + Parameter_Associations => New_List ( + Make_String_Literal (Loc, Pkg_Name), + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Defining_Entity (Pkg_Spec), Loc), + Attribute_Name => + Name_Version))); + Append_To (L, Reg); + Analyze (Reg); + end Build_Passive_Partition_Stub; + + -------------------------------------- + -- Build_RPC_Receiver_Specification -- + -------------------------------------- + + function Build_RPC_Receiver_Specification + (RPC_Receiver : Entity_Id; + Request_Parameter : Entity_Id) return Node_Id + is + Loc : constant Source_Ptr := Sloc (RPC_Receiver); + begin + return + Make_Procedure_Specification (Loc, + Defining_Unit_Name => RPC_Receiver, + Parameter_Specifications => New_List ( + Make_Parameter_Specification (Loc, + Defining_Identifier => Request_Parameter, + Parameter_Type => + New_Occurrence_Of (RTE (RE_Request_Access), Loc)))); + end Build_RPC_Receiver_Specification; + + ---------------------------------------- + -- Build_Remote_Subprogram_Proxy_Type -- + ---------------------------------------- + + function Build_Remote_Subprogram_Proxy_Type + (Loc : Source_Ptr; + ACR_Expression : Node_Id) return Node_Id + is + begin + return + Make_Record_Definition (Loc, + Tagged_Present => True, + Limited_Present => True, + Component_List => + Make_Component_List (Loc, + + Component_Items => New_List ( + Make_Component_Declaration (Loc, + Defining_Identifier => + Make_Defining_Identifier (Loc, + Name_All_Calls_Remote), + Component_Definition => + Make_Component_Definition (Loc, + Subtype_Indication => + New_Occurrence_Of (Standard_Boolean, Loc)), + Expression => + ACR_Expression), + + Make_Component_Declaration (Loc, + Defining_Identifier => + Make_Defining_Identifier (Loc, + Name_Receiver), + Component_Definition => + Make_Component_Definition (Loc, + Subtype_Indication => + New_Occurrence_Of (RTE (RE_Address), Loc)), + Expression => + New_Occurrence_Of (RTE (RE_Null_Address), Loc)), + + Make_Component_Declaration (Loc, + Defining_Identifier => + Make_Defining_Identifier (Loc, + Name_Subp_Id), + Component_Definition => + Make_Component_Definition (Loc, + Subtype_Indication => + New_Occurrence_Of (RTE (RE_Subprogram_Id), Loc)))))); + end Build_Remote_Subprogram_Proxy_Type; + + ------------------------------------ + -- Build_Subprogram_Calling_Stubs -- + ------------------------------------ + + function Build_Subprogram_Calling_Stubs + (Vis_Decl : Node_Id; + Subp_Id : Node_Id; + Asynchronous : Boolean; + Dynamically_Asynchronous : Boolean := False; + Stub_Type : Entity_Id := Empty; + RACW_Type : Entity_Id := Empty; + Locator : Entity_Id := Empty; + New_Name : Name_Id := No_Name) return Node_Id + is + Loc : constant Source_Ptr := Sloc (Vis_Decl); + + Decls : constant List_Id := New_List; + Statements : constant List_Id := New_List; + + Subp_Spec : Node_Id; + -- The specification of the body + + Controlling_Parameter : Entity_Id := Empty; + + Asynchronous_Expr : Node_Id := Empty; + + RCI_Locator : Entity_Id; + + Spec_To_Use : Node_Id; + + procedure Insert_Partition_Check (Parameter : Node_Id); + -- Check that the parameter has been elaborated on the same partition + -- than the controlling parameter (E.4(19)). + + ---------------------------- + -- Insert_Partition_Check -- + ---------------------------- + + procedure Insert_Partition_Check (Parameter : Node_Id) is + Parameter_Entity : constant Entity_Id := + Defining_Identifier (Parameter); + begin + -- The expression that will be built is of the form: + + -- if not Same_Partition (Parameter, Controlling_Parameter) then + -- raise Constraint_Error; + -- end if; + + -- We do not check that Parameter is in Stub_Type since such a check + -- has been inserted at the point of call already (a tag check since + -- we have multiple controlling operands). + + Append_To (Decls, + Make_Raise_Constraint_Error (Loc, + Condition => + Make_Op_Not (Loc, + Right_Opnd => + Make_Function_Call (Loc, + Name => + New_Occurrence_Of (RTE (RE_Same_Partition), Loc), + Parameter_Associations => + New_List ( + Unchecked_Convert_To (RTE (RE_RACW_Stub_Type_Access), + New_Occurrence_Of (Parameter_Entity, Loc)), + Unchecked_Convert_To (RTE (RE_RACW_Stub_Type_Access), + New_Occurrence_Of (Controlling_Parameter, Loc))))), + Reason => CE_Partition_Check_Failed)); + end Insert_Partition_Check; + + -- Start of processing for Build_Subprogram_Calling_Stubs + + begin + Subp_Spec := Copy_Specification (Loc, + Spec => Specification (Vis_Decl), + New_Name => New_Name); + + if Locator = Empty then + RCI_Locator := RCI_Cache; + Spec_To_Use := Specification (Vis_Decl); + else + RCI_Locator := Locator; + Spec_To_Use := Subp_Spec; + end if; + + -- Find a controlling argument if we have a stub type. Also check + -- if this subprogram can be made asynchronous. + + if Present (Stub_Type) + and then Present (Parameter_Specifications (Spec_To_Use)) + then + declare + Current_Parameter : Node_Id := + First (Parameter_Specifications + (Spec_To_Use)); + begin + while Present (Current_Parameter) loop + if + Is_RACW_Controlling_Formal (Current_Parameter, Stub_Type) + then + if Controlling_Parameter = Empty then + Controlling_Parameter := + Defining_Identifier (Current_Parameter); + else + Insert_Partition_Check (Current_Parameter); + end if; + end if; + + Next (Current_Parameter); + end loop; + end; + end if; + + pragma Assert (No (Stub_Type) or else Present (Controlling_Parameter)); + + if Dynamically_Asynchronous then + Asynchronous_Expr := Make_Selected_Component (Loc, + Prefix => Controlling_Parameter, + Selector_Name => Name_Asynchronous); + end if; + + Specific_Build_General_Calling_Stubs + (Decls => Decls, + Statements => Statements, + Target => Specific_Build_Stub_Target (Loc, + Decls, RCI_Locator, Controlling_Parameter), + Subprogram_Id => Subp_Id, + Asynchronous => Asynchronous_Expr, + Is_Known_Asynchronous => Asynchronous + and then not Dynamically_Asynchronous, + Is_Known_Non_Asynchronous + => not Asynchronous + and then not Dynamically_Asynchronous, + Is_Function => Nkind (Spec_To_Use) = + N_Function_Specification, + Spec => Spec_To_Use, + Stub_Type => Stub_Type, + RACW_Type => RACW_Type, + Nod => Vis_Decl); + + RCI_Calling_Stubs_Table.Set + (Defining_Unit_Name (Specification (Vis_Decl)), + Defining_Unit_Name (Spec_To_Use)); + + return + Make_Subprogram_Body (Loc, + Specification => Subp_Spec, + Declarations => Decls, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, Statements)); + end Build_Subprogram_Calling_Stubs; + + ------------------------- + -- Build_Subprogram_Id -- + ------------------------- + + function Build_Subprogram_Id + (Loc : Source_Ptr; + E : Entity_Id) return Node_Id + is + begin + case Get_PCS_Name is + when Name_PolyORB_DSA => + return Make_String_Literal (Loc, Get_Subprogram_Id (E)); + when others => + return Make_Integer_Literal (Loc, Get_Subprogram_Id (E)); + end case; + end Build_Subprogram_Id; + + ------------------------ + -- Copy_Specification -- + ------------------------ + + function Copy_Specification + (Loc : Source_Ptr; + Spec : Node_Id; + Object_Type : Entity_Id := Empty; + Stub_Type : Entity_Id := Empty; + New_Name : Name_Id := No_Name) return Node_Id + is + Parameters : List_Id := No_List; + + Current_Parameter : Node_Id; + Current_Identifier : Entity_Id; + Current_Type : Node_Id; + Current_Etype : Entity_Id; + + Name_For_New_Spec : Name_Id; + + New_Identifier : Entity_Id; + + -- Comments needed in body below ??? + + begin + if New_Name = No_Name then + pragma Assert (Nkind (Spec) = N_Function_Specification + or else Nkind (Spec) = N_Procedure_Specification); + + Name_For_New_Spec := Chars (Defining_Unit_Name (Spec)); + else + Name_For_New_Spec := New_Name; + end if; + + if Present (Parameter_Specifications (Spec)) then + Parameters := New_List; + Current_Parameter := First (Parameter_Specifications (Spec)); + while Present (Current_Parameter) loop + Current_Identifier := Defining_Identifier (Current_Parameter); + Current_Type := Parameter_Type (Current_Parameter); + + if Nkind (Current_Type) = N_Access_Definition then + Current_Etype := Entity (Subtype_Mark (Current_Type)); + + if Present (Object_Type) then + pragma Assert ( + Root_Type (Current_Etype) = Root_Type (Object_Type)); + Current_Type := + Make_Access_Definition (Loc, + Subtype_Mark => New_Occurrence_Of (Stub_Type, Loc), + Null_Exclusion_Present => + Null_Exclusion_Present (Current_Type)); + + else + Current_Type := + Make_Access_Definition (Loc, + Subtype_Mark => + New_Occurrence_Of (Current_Etype, Loc), + Null_Exclusion_Present => + Null_Exclusion_Present (Current_Type)); + end if; + + else + Current_Etype := Entity (Current_Type); + + if Present (Object_Type) + and then Current_Etype = Object_Type + then + Current_Type := New_Occurrence_Of (Stub_Type, Loc); + else + Current_Type := New_Occurrence_Of (Current_Etype, Loc); + end if; + end if; + + New_Identifier := Make_Defining_Identifier (Loc, + Chars (Current_Identifier)); + + Append_To (Parameters, + Make_Parameter_Specification (Loc, + Defining_Identifier => New_Identifier, + Parameter_Type => Current_Type, + In_Present => In_Present (Current_Parameter), + Out_Present => Out_Present (Current_Parameter), + Expression => + New_Copy_Tree (Expression (Current_Parameter)))); + + -- For a regular formal parameter (that needs to be marshalled + -- in the context of remote calls), set the Etype now, because + -- marshalling processing might need it. + + if Is_Entity_Name (Current_Type) then + Set_Etype (New_Identifier, Entity (Current_Type)); + + -- Current_Type is an access definition, special processing + -- (not requiring etype) will occur for marshalling. + + else + null; + end if; + + Next (Current_Parameter); + end loop; + end if; + + case Nkind (Spec) is + + when N_Function_Specification | N_Access_Function_Definition => + return + Make_Function_Specification (Loc, + Defining_Unit_Name => + Make_Defining_Identifier (Loc, + Chars => Name_For_New_Spec), + Parameter_Specifications => Parameters, + Result_Definition => + New_Occurrence_Of (Entity (Result_Definition (Spec)), Loc)); + + when N_Procedure_Specification | N_Access_Procedure_Definition => + return + Make_Procedure_Specification (Loc, + Defining_Unit_Name => + Make_Defining_Identifier (Loc, + Chars => Name_For_New_Spec), + Parameter_Specifications => Parameters); + + when others => + raise Program_Error; + end case; + end Copy_Specification; + + --------------------------- + -- Could_Be_Asynchronous -- + --------------------------- + + function Could_Be_Asynchronous (Spec : Node_Id) return Boolean is + Current_Parameter : Node_Id; + + begin + if Present (Parameter_Specifications (Spec)) then + Current_Parameter := First (Parameter_Specifications (Spec)); + while Present (Current_Parameter) loop + if Out_Present (Current_Parameter) then + return False; + end if; + + Next (Current_Parameter); + end loop; + end if; + + return True; + end Could_Be_Asynchronous; + + --------------------------- + -- Declare_Create_NVList -- + --------------------------- + + procedure Declare_Create_NVList + (Loc : Source_Ptr; + NVList : Entity_Id; + Decls : List_Id; + Stmts : List_Id) + is + begin + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => NVList, + Aliased_Present => False, + Object_Definition => + New_Occurrence_Of (RTE (RE_NVList_Ref), Loc))); + + Append_To (Stmts, + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (RTE (RE_NVList_Create), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (NVList, Loc)))); + end Declare_Create_NVList; + + --------------------------------------------- + -- Expand_All_Calls_Remote_Subprogram_Call -- + --------------------------------------------- + + procedure Expand_All_Calls_Remote_Subprogram_Call (N : Node_Id) is + Called_Subprogram : constant Entity_Id := Entity (Name (N)); + RCI_Package : constant Entity_Id := Scope (Called_Subprogram); + Loc : constant Source_Ptr := Sloc (N); + RCI_Locator : Node_Id; + RCI_Cache : Entity_Id; + Calling_Stubs : Node_Id; + E_Calling_Stubs : Entity_Id; + + begin + E_Calling_Stubs := RCI_Calling_Stubs_Table.Get (Called_Subprogram); + + if E_Calling_Stubs = Empty then + RCI_Cache := RCI_Locator_Table.Get (RCI_Package); + + if RCI_Cache = Empty then + RCI_Locator := + RCI_Package_Locator + (Loc, Specification (Unit_Declaration_Node (RCI_Package))); + Prepend_To (Current_Sem_Unit_Declarations, RCI_Locator); + + -- The RCI_Locator package is inserted at the top level in the + -- current unit, and must appear in the proper scope, so that it + -- is not prematurely removed by the GCC back-end. + + declare + Scop : constant Entity_Id := Cunit_Entity (Current_Sem_Unit); + + begin + if Ekind (Scop) = E_Package_Body then + New_Scope (Spec_Entity (Scop)); + + elsif Ekind (Scop) = E_Subprogram_Body then + New_Scope + (Corresponding_Spec (Unit_Declaration_Node (Scop))); + + else + New_Scope (Scop); + end if; + + Analyze (RCI_Locator); + Pop_Scope; + end; + + RCI_Cache := Defining_Unit_Name (RCI_Locator); + + else + RCI_Locator := Parent (RCI_Cache); + end if; + + Calling_Stubs := Build_Subprogram_Calling_Stubs + (Vis_Decl => Parent (Parent (Called_Subprogram)), + Subp_Id => + Build_Subprogram_Id (Loc, Called_Subprogram), + Asynchronous => Nkind (N) = N_Procedure_Call_Statement + and then + Is_Asynchronous (Called_Subprogram), + Locator => RCI_Cache, + New_Name => New_Internal_Name ('S')); + Insert_After (RCI_Locator, Calling_Stubs); + Analyze (Calling_Stubs); + E_Calling_Stubs := Defining_Unit_Name (Specification (Calling_Stubs)); + end if; + + Rewrite (Name (N), New_Occurrence_Of (E_Calling_Stubs, Loc)); + end Expand_All_Calls_Remote_Subprogram_Call; + + --------------------------------- + -- Expand_Calling_Stubs_Bodies -- + --------------------------------- + + procedure Expand_Calling_Stubs_Bodies (Unit_Node : Node_Id) is + Spec : constant Node_Id := Specification (Unit_Node); + Decls : constant List_Id := Visible_Declarations (Spec); + begin + New_Scope (Scope_Of_Spec (Spec)); + Add_Calling_Stubs_To_Declarations + (Specification (Unit_Node), Decls); + Pop_Scope; + end Expand_Calling_Stubs_Bodies; + + ----------------------------------- + -- Expand_Receiving_Stubs_Bodies -- + ----------------------------------- + + procedure Expand_Receiving_Stubs_Bodies (Unit_Node : Node_Id) is + Spec : Node_Id; + Decls : List_Id; + Temp : List_Id; + + begin + if Nkind (Unit_Node) = N_Package_Declaration then + Spec := Specification (Unit_Node); + Decls := Private_Declarations (Spec); + + if No (Decls) then + Decls := Visible_Declarations (Spec); + end if; + + New_Scope (Scope_Of_Spec (Spec)); + Specific_Add_Receiving_Stubs_To_Declarations (Spec, Decls); + + else + Spec := + Package_Specification_Of_Scope (Corresponding_Spec (Unit_Node)); + Decls := Declarations (Unit_Node); + New_Scope (Scope_Of_Spec (Unit_Node)); + Temp := New_List; + Specific_Add_Receiving_Stubs_To_Declarations (Spec, Temp); + Insert_List_Before (First (Decls), Temp); + end if; + + Pop_Scope; + end Expand_Receiving_Stubs_Bodies; + + -------------------- + -- GARLIC_Support -- + -------------------- + + package body GARLIC_Support is + + -- Local subprograms + + procedure Add_RACW_Read_Attribute + (RACW_Type : Entity_Id; + Stub_Type : Entity_Id; + Stub_Type_Access : Entity_Id; + Declarations : List_Id); + -- Add Read attribute in Decls for the RACW type. The Read attribute + -- is added right after the RACW_Type declaration while the body is + -- inserted after Declarations. + + procedure Add_RACW_Write_Attribute + (RACW_Type : Entity_Id; + Stub_Type : Entity_Id; + Stub_Type_Access : Entity_Id; + RPC_Receiver : Node_Id; + Declarations : List_Id); + -- Same thing for the Write attribute + + function Stream_Parameter return Node_Id; + function Result return Node_Id; + function Object return Node_Id renames Result; + -- Functions to create occurrences of the formal parameter names of + -- the 'Read and 'Write attributes. + + Loc : Source_Ptr; + -- Shared source location used by Add_{Read,Write}_Read_Attribute + -- and their ancillary subroutines (set on entry by Add_RACW_Features). + + procedure Add_RAS_Access_TSS (N : Node_Id); + -- Add a subprogram body for RAS Access TSS + + ------------------------------------- + -- Add_Obj_RPC_Receiver_Completion -- + ------------------------------------- + + procedure Add_Obj_RPC_Receiver_Completion + (Loc : Source_Ptr; + Decls : List_Id; + RPC_Receiver : Entity_Id; + Stub_Elements : Stub_Structure) is + begin + -- The RPC receiver body should not be the completion of the + -- declaration recorded in the stub structure, because then the + -- occurrences of the formal parameters within the body should + -- refer to the entities from the declaration, not from the + -- completion, to which we do not have easy access. Instead, the + -- RPC receiver body acts as its own declaration, and the RPC + -- receiver declaration is completed by a renaming-as-body. + + Append_To (Decls, + Make_Subprogram_Renaming_Declaration (Loc, + Specification => + Copy_Specification (Loc, + Specification (Stub_Elements.RPC_Receiver_Decl)), + Name => New_Occurrence_Of (RPC_Receiver, Loc))); + end Add_Obj_RPC_Receiver_Completion; + + ----------------------- + -- Add_RACW_Features -- + ----------------------- + + procedure Add_RACW_Features + (RACW_Type : Entity_Id; + Stub_Type : Entity_Id; + Stub_Type_Access : Entity_Id; + RPC_Receiver_Decl : Node_Id; + Declarations : List_Id) + is + RPC_Receiver : Node_Id; + Is_RAS : constant Boolean := not Comes_From_Source (RACW_Type); + + begin + Loc := Sloc (RACW_Type); + + if Is_RAS then + + -- For a RAS, the RPC receiver is that of the RCI unit, + -- not that of the corresponding distributed object type. + -- We retrieve its address from the local proxy object. + + RPC_Receiver := Make_Selected_Component (Loc, + Prefix => + Unchecked_Convert_To (RTE (RE_RAS_Proxy_Type_Access), Object), + Selector_Name => Make_Identifier (Loc, Name_Receiver)); + + else + RPC_Receiver := Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of ( + Defining_Unit_Name (Specification (RPC_Receiver_Decl)), Loc), + Attribute_Name => Name_Address); + end if; + + Add_RACW_Write_Attribute ( + RACW_Type, + Stub_Type, + Stub_Type_Access, + RPC_Receiver, + Declarations); + + Add_RACW_Read_Attribute ( + RACW_Type, + Stub_Type, + Stub_Type_Access, + Declarations); + end Add_RACW_Features; + + ----------------------------- + -- Add_RACW_Read_Attribute -- + ----------------------------- + + procedure Add_RACW_Read_Attribute + (RACW_Type : Entity_Id; + Stub_Type : Entity_Id; + Stub_Type_Access : Entity_Id; + Declarations : List_Id) + is + Proc_Decl : Node_Id; + Attr_Decl : Node_Id; + + Body_Node : Node_Id; + + Decls : List_Id; + Statements : List_Id; + Local_Statements : List_Id; + Remote_Statements : List_Id; + -- Various parts of the procedure + + Procedure_Name : constant Name_Id := + New_Internal_Name ('R'); + Source_Partition : constant Entity_Id := + Make_Defining_Identifier + (Loc, New_Internal_Name ('P')); + Source_Receiver : constant Entity_Id := + Make_Defining_Identifier + (Loc, New_Internal_Name ('S')); + Source_Address : constant Entity_Id := + Make_Defining_Identifier + (Loc, New_Internal_Name ('P')); + Local_Stub : constant Entity_Id := + Make_Defining_Identifier + (Loc, New_Internal_Name ('L')); + Stubbed_Result : constant Entity_Id := + Make_Defining_Identifier + (Loc, New_Internal_Name ('S')); + Asynchronous_Flag : constant Entity_Id := + Asynchronous_Flags_Table.Get (RACW_Type); + pragma Assert (Present (Asynchronous_Flag)); + + -- Start of processing for Add_RACW_Read_Attribute + + begin + -- Generate object declarations + + Decls := New_List ( + Make_Object_Declaration (Loc, + Defining_Identifier => Source_Partition, + Object_Definition => + New_Occurrence_Of (RTE (RE_Partition_ID), Loc)), + + Make_Object_Declaration (Loc, + Defining_Identifier => Source_Receiver, + Object_Definition => + New_Occurrence_Of (RTE (RE_Unsigned_64), Loc)), + + Make_Object_Declaration (Loc, + Defining_Identifier => Source_Address, + Object_Definition => + New_Occurrence_Of (RTE (RE_Unsigned_64), Loc)), + + Make_Object_Declaration (Loc, + Defining_Identifier => Local_Stub, + Aliased_Present => True, + Object_Definition => New_Occurrence_Of (Stub_Type, Loc)), + + Make_Object_Declaration (Loc, + Defining_Identifier => Stubbed_Result, + Object_Definition => + New_Occurrence_Of (Stub_Type_Access, Loc), + Expression => + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Local_Stub, Loc), + Attribute_Name => + Name_Unchecked_Access))); + + -- Read the source Partition_ID and RPC_Receiver from incoming stream + + Statements := New_List ( + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (RTE (RE_Partition_ID), Loc), + Attribute_Name => Name_Read, + Expressions => New_List ( + Stream_Parameter, + New_Occurrence_Of (Source_Partition, Loc))), + + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (RTE (RE_Unsigned_64), Loc), + Attribute_Name => + Name_Read, + Expressions => New_List ( + Stream_Parameter, + New_Occurrence_Of (Source_Receiver, Loc))), + + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (RTE (RE_Unsigned_64), Loc), + Attribute_Name => + Name_Read, + Expressions => New_List ( + Stream_Parameter, + New_Occurrence_Of (Source_Address, Loc)))); + + -- Build_Get_Unique_RP_Call needs the type of Stubbed_Result + + Set_Etype (Stubbed_Result, Stub_Type_Access); + + -- If the Address is Null_Address, then return a null object + + Append_To (Statements, + Make_Implicit_If_Statement (RACW_Type, + Condition => + Make_Op_Eq (Loc, + Left_Opnd => New_Occurrence_Of (Source_Address, Loc), + Right_Opnd => Make_Integer_Literal (Loc, Uint_0)), + Then_Statements => New_List ( + Make_Assignment_Statement (Loc, + Name => Result, + Expression => Make_Null (Loc)), + Make_Return_Statement (Loc)))); + + -- If the RACW denotes an object created on the current partition, + -- Local_Statements will be executed. The real object will be used. + + Local_Statements := New_List ( + Make_Assignment_Statement (Loc, + Name => Result, + Expression => + Unchecked_Convert_To (RACW_Type, + OK_Convert_To (RTE (RE_Address), + New_Occurrence_Of (Source_Address, Loc))))); + + -- If the object is located on another partition, then a stub object + -- will be created with all the information needed to rebuild the + -- real object at the other end. + + Remote_Statements := New_List ( + + Make_Assignment_Statement (Loc, + Name => Make_Selected_Component (Loc, + Prefix => Stubbed_Result, + Selector_Name => Name_Origin), + Expression => + New_Occurrence_Of (Source_Partition, Loc)), + + Make_Assignment_Statement (Loc, + Name => Make_Selected_Component (Loc, + Prefix => Stubbed_Result, + Selector_Name => Name_Receiver), + Expression => + New_Occurrence_Of (Source_Receiver, Loc)), + + Make_Assignment_Statement (Loc, + Name => Make_Selected_Component (Loc, + Prefix => Stubbed_Result, + Selector_Name => Name_Addr), + Expression => + New_Occurrence_Of (Source_Address, Loc))); + + Append_To (Remote_Statements, + Make_Assignment_Statement (Loc, + Name => Make_Selected_Component (Loc, + Prefix => Stubbed_Result, + Selector_Name => Name_Asynchronous), + Expression => + New_Occurrence_Of (Asynchronous_Flag, Loc))); + + Append_List_To (Remote_Statements, + Build_Get_Unique_RP_Call (Loc, Stubbed_Result, Stub_Type)); + -- ??? Issue with asynchronous calls here: the Asynchronous + -- flag is set on the stub type if, and only if, the RACW type + -- has a pragma Asynchronous. This is incorrect for RACWs that + -- implement RAS types, because in that case the /designated + -- subprogram/ (not the type) might be asynchronous, and + -- that causes the stub to need to be asynchronous too. + -- A solution is to transport a RAS as a struct containing + -- a RACW and an asynchronous flag, and to properly alter + -- the Asynchronous component in the stub type in the RAS's + -- Input TSS. + + Append_To (Remote_Statements, + Make_Assignment_Statement (Loc, + Name => Result, + Expression => Unchecked_Convert_To (RACW_Type, + New_Occurrence_Of (Stubbed_Result, Loc)))); + + -- Distinguish between the local and remote cases, and execute the + -- appropriate piece of code. + + Append_To (Statements, + Make_Implicit_If_Statement (RACW_Type, + Condition => + Make_Op_Eq (Loc, + Left_Opnd => + Make_Function_Call (Loc, + Name => New_Occurrence_Of ( + RTE (RE_Get_Local_Partition_Id), Loc)), + Right_Opnd => New_Occurrence_Of (Source_Partition, Loc)), + Then_Statements => Local_Statements, + Else_Statements => Remote_Statements)); + + Build_Stream_Procedure + (Loc, RACW_Type, Body_Node, + Make_Defining_Identifier (Loc, Procedure_Name), + Statements, Outp => True); + Set_Declarations (Body_Node, Decls); + + Proc_Decl := Make_Subprogram_Declaration (Loc, + Copy_Specification (Loc, Specification (Body_Node))); + + Attr_Decl := + Make_Attribute_Definition_Clause (Loc, + Name => New_Occurrence_Of (RACW_Type, Loc), + Chars => Name_Read, + Expression => + New_Occurrence_Of ( + Defining_Unit_Name (Specification (Proc_Decl)), Loc)); + + Insert_After (Declaration_Node (RACW_Type), Proc_Decl); + Insert_After (Proc_Decl, Attr_Decl); + Append_To (Declarations, Body_Node); + end Add_RACW_Read_Attribute; + + ------------------------------ + -- Add_RACW_Write_Attribute -- + ------------------------------ + + procedure Add_RACW_Write_Attribute + (RACW_Type : Entity_Id; + Stub_Type : Entity_Id; + Stub_Type_Access : Entity_Id; + RPC_Receiver : Node_Id; + Declarations : List_Id) + is + Body_Node : Node_Id; + Proc_Decl : Node_Id; + Attr_Decl : Node_Id; + + Statements : List_Id; + Local_Statements : List_Id; + Remote_Statements : List_Id; + Null_Statements : List_Id; + + Procedure_Name : constant Name_Id := New_Internal_Name ('R'); + + begin + -- Build the code fragment corresponding to the marshalling of a + -- local object. + + Local_Statements := New_List ( + + Pack_Entity_Into_Stream_Access (Loc, + Stream => Stream_Parameter, + Object => RTE (RE_Get_Local_Partition_Id)), + + Pack_Node_Into_Stream_Access (Loc, + Stream => Stream_Parameter, + Object => OK_Convert_To (RTE (RE_Unsigned_64), RPC_Receiver), + Etyp => RTE (RE_Unsigned_64)), + + Pack_Node_Into_Stream_Access (Loc, + Stream => Stream_Parameter, + Object => OK_Convert_To (RTE (RE_Unsigned_64), + Make_Attribute_Reference (Loc, + Prefix => + Make_Explicit_Dereference (Loc, + Prefix => Object), + Attribute_Name => Name_Address)), + Etyp => RTE (RE_Unsigned_64))); + + -- Build the code fragment corresponding to the marshalling of + -- a remote object. + + Remote_Statements := New_List ( + + Pack_Node_Into_Stream_Access (Loc, + Stream => Stream_Parameter, + Object => + Make_Selected_Component (Loc, + Prefix => Unchecked_Convert_To (Stub_Type_Access, + Object), + Selector_Name => + Make_Identifier (Loc, Name_Origin)), + Etyp => RTE (RE_Partition_ID)), + + Pack_Node_Into_Stream_Access (Loc, + Stream => Stream_Parameter, + Object => + Make_Selected_Component (Loc, + Prefix => Unchecked_Convert_To (Stub_Type_Access, + Object), + Selector_Name => + Make_Identifier (Loc, Name_Receiver)), + Etyp => RTE (RE_Unsigned_64)), + + Pack_Node_Into_Stream_Access (Loc, + Stream => Stream_Parameter, + Object => + Make_Selected_Component (Loc, + Prefix => Unchecked_Convert_To (Stub_Type_Access, + Object), + Selector_Name => + Make_Identifier (Loc, Name_Addr)), + Etyp => RTE (RE_Unsigned_64))); + + -- Build code fragment corresponding to marshalling of a null object + + Null_Statements := New_List ( + + Pack_Entity_Into_Stream_Access (Loc, + Stream => Stream_Parameter, + Object => RTE (RE_Get_Local_Partition_Id)), + + Pack_Node_Into_Stream_Access (Loc, + Stream => Stream_Parameter, + Object => OK_Convert_To (RTE (RE_Unsigned_64), RPC_Receiver), + Etyp => RTE (RE_Unsigned_64)), + + Pack_Node_Into_Stream_Access (Loc, + Stream => Stream_Parameter, + Object => Make_Integer_Literal (Loc, Uint_0), + Etyp => RTE (RE_Unsigned_64))); + + Statements := New_List ( + Make_Implicit_If_Statement (RACW_Type, + Condition => + Make_Op_Eq (Loc, + Left_Opnd => Object, + Right_Opnd => Make_Null (Loc)), + Then_Statements => Null_Statements, + Elsif_Parts => New_List ( + Make_Elsif_Part (Loc, + Condition => + Make_Op_Eq (Loc, + Left_Opnd => + Make_Attribute_Reference (Loc, + Prefix => Object, + Attribute_Name => Name_Tag), + Right_Opnd => + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Stub_Type, Loc), + Attribute_Name => Name_Tag)), + Then_Statements => Remote_Statements)), + Else_Statements => Local_Statements)); + + Build_Stream_Procedure + (Loc, RACW_Type, Body_Node, + Make_Defining_Identifier (Loc, Procedure_Name), + Statements, Outp => False); + + Proc_Decl := Make_Subprogram_Declaration (Loc, + Copy_Specification (Loc, Specification (Body_Node))); + + Attr_Decl := + Make_Attribute_Definition_Clause (Loc, + Name => New_Occurrence_Of (RACW_Type, Loc), + Chars => Name_Write, + Expression => + New_Occurrence_Of ( + Defining_Unit_Name (Specification (Proc_Decl)), Loc)); + + Insert_After (Declaration_Node (RACW_Type), Proc_Decl); + Insert_After (Proc_Decl, Attr_Decl); + Append_To (Declarations, Body_Node); + end Add_RACW_Write_Attribute; + + ------------------------ + -- Add_RAS_Access_TSS -- + ------------------------ + + procedure Add_RAS_Access_TSS (N : Node_Id) is + Loc : constant Source_Ptr := Sloc (N); + + Ras_Type : constant Entity_Id := Defining_Identifier (N); + Fat_Type : constant Entity_Id := Equivalent_Type (Ras_Type); + -- Ras_Type is the access to subprogram type while Fat_Type is the + -- corresponding record type. + + RACW_Type : constant Entity_Id := + Underlying_RACW_Type (Ras_Type); + Desig : constant Entity_Id := + Etype (Designated_Type (RACW_Type)); + + Stub_Elements : constant Stub_Structure := + Stubs_Table.Get (Desig); + pragma Assert (Stub_Elements /= Empty_Stub_Structure); + + Proc : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => Make_TSS_Name (Ras_Type, TSS_RAS_Access)); + + Proc_Spec : Node_Id; + + -- Formal parameters + + Package_Name : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => Name_P); + -- Target package + + Subp_Id : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => Name_S); + -- Target subprogram + + Asynch_P : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => Name_Asynchronous); + -- Is the procedure to which the 'Access applies asynchronous? + + All_Calls_Remote : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => Name_All_Calls_Remote); + -- True if an All_Calls_Remote pragma applies to the RCI unit + -- that contains the subprogram. + + -- Common local variables + + Proc_Decls : List_Id; + Proc_Statements : List_Id; + + Origin : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => New_Internal_Name ('P')); + + -- Additional local variables for the local case + + Proxy_Addr : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => New_Internal_Name ('P')); + + -- Additional local variables for the remote case + + Local_Stub : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => New_Internal_Name ('L')); + + Stub_Ptr : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => New_Internal_Name ('S')); + + function Set_Field + (Field_Name : Name_Id; + Value : Node_Id) return Node_Id; + -- Construct an assignment that sets the named component in the + -- returned record + + --------------- + -- Set_Field -- + --------------- + + function Set_Field + (Field_Name : Name_Id; + Value : Node_Id) return Node_Id + is + begin + return + Make_Assignment_Statement (Loc, + Name => + Make_Selected_Component (Loc, + Prefix => Stub_Ptr, + Selector_Name => Field_Name), + Expression => Value); + end Set_Field; + + -- Start of processing for Add_RAS_Access_TSS + + begin + Proc_Decls := New_List ( + + -- Common declarations + + Make_Object_Declaration (Loc, + Defining_Identifier => Origin, + Constant_Present => True, + Object_Definition => + New_Occurrence_Of (RTE (RE_Partition_ID), Loc), + Expression => + Make_Function_Call (Loc, + Name => + New_Occurrence_Of (RTE (RE_Get_Active_Partition_Id), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Package_Name, Loc)))), + + -- Declaration use only in the local case: proxy address + + Make_Object_Declaration (Loc, + Defining_Identifier => Proxy_Addr, + Object_Definition => + New_Occurrence_Of (RTE (RE_Unsigned_64), Loc)), + + -- Declarations used only in the remote case: stub object and + -- stub pointer. + + Make_Object_Declaration (Loc, + Defining_Identifier => Local_Stub, + Aliased_Present => True, + Object_Definition => + New_Occurrence_Of (Stub_Elements.Stub_Type, Loc)), + + Make_Object_Declaration (Loc, + Defining_Identifier => + Stub_Ptr, + Object_Definition => + New_Occurrence_Of (Stub_Elements.Stub_Type_Access, Loc), + Expression => + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Local_Stub, Loc), + Attribute_Name => Name_Unchecked_Access))); + + Set_Etype (Stub_Ptr, Stub_Elements.Stub_Type_Access); + -- Build_Get_Unique_RP_Call needs this information + + -- Note: Here we assume that the Fat_Type is a record + -- containing just a pointer to a proxy or stub object. + + Proc_Statements := New_List ( + + -- Generate: + + -- Get_RAS_Info (Pkg, Subp, PA); + -- if Origin = Local_Partition_Id + -- and then not All_Calls_Remote + -- then + -- return Fat_Type!(PA); + -- end if; + + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (RTE (RE_Get_RAS_Info), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Package_Name, Loc), + New_Occurrence_Of (Subp_Id, Loc), + New_Occurrence_Of (Proxy_Addr, Loc))), + + Make_Implicit_If_Statement (N, + Condition => + Make_And_Then (Loc, + Left_Opnd => + Make_Op_Eq (Loc, + Left_Opnd => + New_Occurrence_Of (Origin, Loc), + Right_Opnd => + Make_Function_Call (Loc, + New_Occurrence_Of ( + RTE (RE_Get_Local_Partition_Id), Loc))), + Right_Opnd => + Make_Op_Not (Loc, + New_Occurrence_Of (All_Calls_Remote, Loc))), + Then_Statements => New_List ( + Make_Return_Statement (Loc, + Unchecked_Convert_To (Fat_Type, + OK_Convert_To (RTE (RE_Address), + New_Occurrence_Of (Proxy_Addr, Loc)))))), + + Set_Field (Name_Origin, + New_Occurrence_Of (Origin, Loc)), + + Set_Field (Name_Receiver, + Make_Function_Call (Loc, + Name => + New_Occurrence_Of (RTE (RE_Get_RCI_Package_Receiver), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Package_Name, Loc)))), + + Set_Field (Name_Addr, New_Occurrence_Of (Proxy_Addr, Loc)), + + -- E.4.1(9) A remote call is asynchronous if it is a call to + -- a procedure, or a call through a value of an access-to-procedure + -- type, to which a pragma Asynchronous applies. + + -- Parameter Asynch_P is true when the procedure is asynchronous; + -- Expression Asynch_T is true when the type is asynchronous. + + Set_Field (Name_Asynchronous, + Make_Or_Else (Loc, + New_Occurrence_Of (Asynch_P, Loc), + New_Occurrence_Of (Boolean_Literals ( + Is_Asynchronous (Ras_Type)), Loc)))); + + Append_List_To (Proc_Statements, + Build_Get_Unique_RP_Call + (Loc, Stub_Ptr, Stub_Elements.Stub_Type)); + + -- Return the newly created value + + Append_To (Proc_Statements, + Make_Return_Statement (Loc, + Expression => + Unchecked_Convert_To (Fat_Type, + New_Occurrence_Of (Stub_Ptr, Loc)))); + + Proc_Spec := + Make_Function_Specification (Loc, + Defining_Unit_Name => Proc, + Parameter_Specifications => New_List ( + Make_Parameter_Specification (Loc, + Defining_Identifier => Package_Name, + Parameter_Type => + New_Occurrence_Of (Standard_String, Loc)), + + Make_Parameter_Specification (Loc, + Defining_Identifier => Subp_Id, + Parameter_Type => + New_Occurrence_Of (RTE (RE_Subprogram_Id), Loc)), + + Make_Parameter_Specification (Loc, + Defining_Identifier => Asynch_P, + Parameter_Type => + New_Occurrence_Of (Standard_Boolean, Loc)), + + Make_Parameter_Specification (Loc, + Defining_Identifier => All_Calls_Remote, + Parameter_Type => + New_Occurrence_Of (Standard_Boolean, Loc))), + + Result_Definition => + New_Occurrence_Of (Fat_Type, Loc)); + + -- Set the kind and return type of the function to prevent + -- ambiguities between Ras_Type and Fat_Type in subsequent analysis. + + Set_Ekind (Proc, E_Function); + Set_Etype (Proc, Fat_Type); + + Discard_Node ( + Make_Subprogram_Body (Loc, + Specification => Proc_Spec, + Declarations => Proc_Decls, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => Proc_Statements))); + + Set_TSS (Fat_Type, Proc); + end Add_RAS_Access_TSS; + + ----------------------- + -- Add_RAST_Features -- + ----------------------- + + procedure Add_RAST_Features + (Vis_Decl : Node_Id; + RAS_Type : Entity_Id) + is + pragma Warnings (Off); + pragma Unreferenced (RAS_Type); + pragma Warnings (On); + begin + Add_RAS_Access_TSS (Vis_Decl); + end Add_RAST_Features; + + ----------------------------------------- + -- Add_Receiving_Stubs_To_Declarations -- + ----------------------------------------- + + procedure Add_Receiving_Stubs_To_Declarations + (Pkg_Spec : Node_Id; + Decls : List_Id) + is + Loc : constant Source_Ptr := Sloc (Pkg_Spec); + + Request_Parameter : Node_Id; + + Pkg_RPC_Receiver : constant Entity_Id := + Make_Defining_Identifier (Loc, + New_Internal_Name ('H')); + Pkg_RPC_Receiver_Statements : List_Id; + Pkg_RPC_Receiver_Cases : constant List_Id := New_List; + Pkg_RPC_Receiver_Body : Node_Id; + -- A Pkg_RPC_Receiver is built to decode the request + + Lookup_RAS_Info : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => New_Internal_Name ('R')); + -- A remote subprogram is created to allow peers to look up + -- RAS information using subprogram ids. + + Subp_Id : Entity_Id; + Subp_Index : Entity_Id; + -- Subprogram_Id as read from the incoming stream + + Current_Declaration : Node_Id; + Current_Subprogram_Number : Int := First_RCI_Subprogram_Id; + Current_Stubs : Node_Id; + + Subp_Info_Array : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => New_Internal_Name ('I')); + + Subp_Info_List : constant List_Id := New_List; + + Register_Pkg_Actuals : constant List_Id := New_List; + + All_Calls_Remote_E : Entity_Id; + Proxy_Object_Addr : Entity_Id; + + procedure Append_Stubs_To + (RPC_Receiver_Cases : List_Id; + Stubs : Node_Id; + Subprogram_Number : Int); + -- Add one case to the specified RPC receiver case list + -- associating Subprogram_Number with the subprogram declared + -- by Declaration, for which we have receiving stubs in Stubs. + + --------------------- + -- Append_Stubs_To -- + --------------------- + + procedure Append_Stubs_To + (RPC_Receiver_Cases : List_Id; + Stubs : Node_Id; + Subprogram_Number : Int) + is + begin + Append_To (RPC_Receiver_Cases, + Make_Case_Statement_Alternative (Loc, + Discrete_Choices => + New_List (Make_Integer_Literal (Loc, Subprogram_Number)), + Statements => + New_List ( + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of ( + Defining_Entity (Stubs), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Request_Parameter, Loc)))))); + end Append_Stubs_To; + + -- Start of processing for Add_Receiving_Stubs_To_Declarations + + begin + -- Building receiving stubs consist in several operations: + + -- - a package RPC receiver must be built. This subprogram + -- will get a Subprogram_Id from the incoming stream + -- and will dispatch the call to the right subprogram + + -- - a receiving stub for any subprogram visible in the package + -- spec. This stub will read all the parameters from the stream, + -- and put the result as well as the exception occurrence in the + -- output stream + + -- - a dummy package with an empty spec and a body made of an + -- elaboration part, whose job is to register the receiving + -- part of this RCI package on the name server. This is done + -- by calling System.Partition_Interface.Register_Receiving_Stub + + Build_RPC_Receiver_Body ( + RPC_Receiver => Pkg_RPC_Receiver, + Request => Request_Parameter, + Subp_Id => Subp_Id, + Subp_Index => Subp_Index, + Stmts => Pkg_RPC_Receiver_Statements, + Decl => Pkg_RPC_Receiver_Body); + pragma Assert (Subp_Id = Subp_Index); + + -- A null subp_id denotes a call through a RAS, in which case the + -- next Uint_64 element in the stream is the address of the local + -- proxy object, from which we can retrieve the actual subprogram id. + + Append_To (Pkg_RPC_Receiver_Statements, + Make_Implicit_If_Statement (Pkg_Spec, + Condition => + Make_Op_Eq (Loc, + New_Occurrence_Of (Subp_Id, Loc), + Make_Integer_Literal (Loc, 0)), + Then_Statements => New_List ( + Make_Assignment_Statement (Loc, + Name => + New_Occurrence_Of (Subp_Id, Loc), + Expression => + Make_Selected_Component (Loc, + Prefix => + Unchecked_Convert_To (RTE (RE_RAS_Proxy_Type_Access), + OK_Convert_To (RTE (RE_Address), + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (RTE (RE_Unsigned_64), Loc), + Attribute_Name => + Name_Input, + Expressions => New_List ( + Make_Selected_Component (Loc, + Prefix => Request_Parameter, + Selector_Name => Name_Params))))), + Selector_Name => + Make_Identifier (Loc, Name_Subp_Id)))))); + + -- Build a subprogram for RAS information lookups + + Current_Declaration := + Make_Subprogram_Declaration (Loc, + Specification => + Make_Function_Specification (Loc, + Defining_Unit_Name => + Lookup_RAS_Info, + Parameter_Specifications => New_List ( + Make_Parameter_Specification (Loc, + Defining_Identifier => + Make_Defining_Identifier (Loc, Name_Subp_Id), + In_Present => + True, + Parameter_Type => + New_Occurrence_Of (RTE (RE_Subprogram_Id), Loc))), + Result_Definition => + New_Occurrence_Of (RTE (RE_Unsigned_64), Loc))); + Append_To (Decls, Current_Declaration); + Analyze (Current_Declaration); + + Current_Stubs := Build_Subprogram_Receiving_Stubs + (Vis_Decl => Current_Declaration, + Asynchronous => False); + Append_To (Decls, Current_Stubs); + Analyze (Current_Stubs); + + Append_Stubs_To (Pkg_RPC_Receiver_Cases, + Stubs => + Current_Stubs, + Subprogram_Number => 1); + + -- For each subprogram, the receiving stub will be built and a + -- case statement will be made on the Subprogram_Id to dispatch + -- to the right subprogram. + + All_Calls_Remote_E := Boolean_Literals ( + Has_All_Calls_Remote (Defining_Entity (Pkg_Spec))); + + Overload_Counter_Table.Reset; + + Current_Declaration := First (Visible_Declarations (Pkg_Spec)); + while Present (Current_Declaration) loop + if Nkind (Current_Declaration) = N_Subprogram_Declaration + and then Comes_From_Source (Current_Declaration) + then + declare + Loc : constant Source_Ptr := + Sloc (Current_Declaration); + -- While specifically processing Current_Declaration, use + -- its Sloc as the location of all generated nodes. + + Subp_Def : constant Entity_Id := + Defining_Unit_Name + (Specification (Current_Declaration)); + + Subp_Val : String_Id; + + begin + pragma Assert (Current_Subprogram_Number = + Get_Subprogram_Id (Subp_Def)); + + -- Build receiving stub + + Current_Stubs := + Build_Subprogram_Receiving_Stubs + (Vis_Decl => Current_Declaration, + Asynchronous => + Nkind (Specification (Current_Declaration)) = + N_Procedure_Specification + and then Is_Asynchronous (Subp_Def)); + + Append_To (Decls, Current_Stubs); + Analyze (Current_Stubs); + + -- Build RAS proxy + + Add_RAS_Proxy_And_Analyze (Decls, + Vis_Decl => + Current_Declaration, + All_Calls_Remote_E => + All_Calls_Remote_E, + Proxy_Object_Addr => + Proxy_Object_Addr); + + -- Compute distribution identifier + + Assign_Subprogram_Identifier ( + Subp_Def, + Current_Subprogram_Number, + Subp_Val); + + -- Add subprogram descriptor (RCI_Subp_Info) to the + -- subprograms table for this receiver. The aggregate + -- below must be kept consistent with the declaration + -- of type RCI_Subp_Info in System.Partition_Interface. + + Append_To (Subp_Info_List, + Make_Component_Association (Loc, + Choices => New_List ( + Make_Integer_Literal (Loc, + Current_Subprogram_Number)), + Expression => + Make_Aggregate (Loc, + Component_Associations => New_List ( + Make_Component_Association (Loc, + Choices => New_List ( + Make_Identifier (Loc, Name_Addr)), + Expression => + New_Occurrence_Of ( + Proxy_Object_Addr, Loc)))))); + + Append_Stubs_To (Pkg_RPC_Receiver_Cases, + Stubs => + Current_Stubs, + Subprogram_Number => + Current_Subprogram_Number); + end; + + Current_Subprogram_Number := Current_Subprogram_Number + 1; + end if; + + Next (Current_Declaration); + end loop; + + -- If we receive an invalid Subprogram_Id, it is best to do nothing + -- rather than raising an exception since we do not want someone + -- to crash a remote partition by sending invalid subprogram ids. + -- This is consistent with the other parts of the case statement + -- since even in presence of incorrect parameters in the stream, + -- every exception will be caught and (if the subprogram is not an + -- APC) put into the result stream and sent away. + + Append_To (Pkg_RPC_Receiver_Cases, + Make_Case_Statement_Alternative (Loc, + Discrete_Choices => + New_List (Make_Others_Choice (Loc)), + Statements => + New_List (Make_Null_Statement (Loc)))); + + Append_To (Pkg_RPC_Receiver_Statements, + Make_Case_Statement (Loc, + Expression => + New_Occurrence_Of (Subp_Id, Loc), + Alternatives => Pkg_RPC_Receiver_Cases)); + + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Subp_Info_Array, + Constant_Present => True, + Aliased_Present => True, + Object_Definition => + Make_Subtype_Indication (Loc, + Subtype_Mark => + New_Occurrence_Of (RTE (RE_RCI_Subp_Info_Array), Loc), + Constraint => + Make_Index_Or_Discriminant_Constraint (Loc, + New_List ( + Make_Range (Loc, + Low_Bound => Make_Integer_Literal (Loc, + First_RCI_Subprogram_Id), + High_Bound => + Make_Integer_Literal (Loc, + First_RCI_Subprogram_Id + + List_Length (Subp_Info_List) - 1))))), + Expression => + Make_Aggregate (Loc, + Component_Associations => Subp_Info_List))); + Analyze (Last (Decls)); + + Append_To (Decls, + Make_Subprogram_Body (Loc, + Specification => + Copy_Specification (Loc, Parent (Lookup_RAS_Info)), + Declarations => + No_List, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => New_List ( + Make_Return_Statement (Loc, + Expression => OK_Convert_To (RTE (RE_Unsigned_64), + Make_Selected_Component (Loc, + Prefix => + Make_Indexed_Component (Loc, + Prefix => + New_Occurrence_Of (Subp_Info_Array, Loc), + Expressions => New_List ( + Convert_To (Standard_Integer, + Make_Identifier (Loc, Name_Subp_Id)))), + Selector_Name => + Make_Identifier (Loc, Name_Addr)))))))); + Analyze (Last (Decls)); + + Append_To (Decls, Pkg_RPC_Receiver_Body); + Analyze (Last (Decls)); + + Get_Library_Unit_Name_String (Pkg_Spec); + Append_To (Register_Pkg_Actuals, + -- Name + Make_String_Literal (Loc, + Strval => String_From_Name_Buffer)); + + Append_To (Register_Pkg_Actuals, + -- Receiver + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Pkg_RPC_Receiver, Loc), + Attribute_Name => + Name_Unrestricted_Access)); + + Append_To (Register_Pkg_Actuals, + -- Version + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Defining_Entity (Pkg_Spec), Loc), + Attribute_Name => + Name_Version)); + + Append_To (Register_Pkg_Actuals, + -- Subp_Info + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Subp_Info_Array, Loc), + Attribute_Name => + Name_Address)); + + Append_To (Register_Pkg_Actuals, + -- Subp_Info_Len + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Subp_Info_Array, Loc), + Attribute_Name => + Name_Length)); + + Append_To (Decls, + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (RTE (RE_Register_Receiving_Stub), Loc), + Parameter_Associations => Register_Pkg_Actuals)); + Analyze (Last (Decls)); + end Add_Receiving_Stubs_To_Declarations; + + --------------------------------- + -- Build_General_Calling_Stubs -- + --------------------------------- + + procedure Build_General_Calling_Stubs + (Decls : List_Id; + Statements : List_Id; + Target_Partition : Entity_Id; + Target_RPC_Receiver : Node_Id; + Subprogram_Id : Node_Id; + Asynchronous : Node_Id := Empty; + Is_Known_Asynchronous : Boolean := False; + Is_Known_Non_Asynchronous : Boolean := False; + Is_Function : Boolean; + Spec : Node_Id; + Stub_Type : Entity_Id := Empty; + RACW_Type : Entity_Id := Empty; + Nod : Node_Id) + is + Loc : constant Source_Ptr := Sloc (Nod); + + Stream_Parameter : Node_Id; + -- Name of the stream used to transmit parameters to the + -- remote package. + + Result_Parameter : Node_Id; + -- Name of the result parameter (in non-APC cases) which get the + -- result of the remote subprogram. + + Exception_Return_Parameter : Node_Id; + -- Name of the parameter which will hold the exception sent by the + -- remote subprogram. + + Current_Parameter : Node_Id; + -- Current parameter being handled + + Ordered_Parameters_List : constant List_Id := + Build_Ordered_Parameters_List (Spec); + + Asynchronous_Statements : List_Id := No_List; + Non_Asynchronous_Statements : List_Id := No_List; + -- Statements specifics to the Asynchronous/Non-Asynchronous cases + + Extra_Formal_Statements : constant List_Id := New_List; + -- List of statements for extra formal parameters. It will appear + -- after the regular statements for writing out parameters. + + pragma Warnings (Off); + pragma Unreferenced (RACW_Type); + -- Used only for the PolyORB case + pragma Warnings (On); + + begin + -- The general form of a calling stub for a given subprogram is: + + -- procedure X (...) is P : constant Partition_ID := + -- RCI_Cache.Get_Active_Partition_ID; Stream, Result : aliased + -- System.RPC.Params_Stream_Type (0); begin + -- Put_Package_RPC_Receiver_In_Stream; (the package RPC receiver + -- comes from RCI_Cache.Get_RCI_Package_Receiver) + -- Put_Subprogram_Id_In_Stream; Put_Parameters_In_Stream; Do_RPC + -- (Stream, Result); Read_Exception_Occurrence_From_Result; + -- Raise_It; + -- Read_Out_Parameters_And_Function_Return_From_Stream; end X; + + -- There are some variations: Do_APC is called for an asynchronous + -- procedure and the part after the call is completely ommitted as + -- well as the declaration of Result. For a function call, 'Input is + -- always used to read the result even if it is constrained. + + Stream_Parameter := + Make_Defining_Identifier (Loc, New_Internal_Name ('S')); + + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Stream_Parameter, + Aliased_Present => True, + Object_Definition => + Make_Subtype_Indication (Loc, + Subtype_Mark => + New_Occurrence_Of (RTE (RE_Params_Stream_Type), Loc), + Constraint => + Make_Index_Or_Discriminant_Constraint (Loc, + Constraints => + New_List (Make_Integer_Literal (Loc, 0)))))); + + if not Is_Known_Asynchronous then + Result_Parameter := + Make_Defining_Identifier (Loc, New_Internal_Name ('R')); + + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Result_Parameter, + Aliased_Present => True, + Object_Definition => + Make_Subtype_Indication (Loc, + Subtype_Mark => + New_Occurrence_Of (RTE (RE_Params_Stream_Type), Loc), + Constraint => + Make_Index_Or_Discriminant_Constraint (Loc, + Constraints => + New_List (Make_Integer_Literal (Loc, 0)))))); + + Exception_Return_Parameter := + Make_Defining_Identifier (Loc, New_Internal_Name ('E')); + + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Exception_Return_Parameter, + Object_Definition => + New_Occurrence_Of (RTE (RE_Exception_Occurrence), Loc))); + + else + Result_Parameter := Empty; + Exception_Return_Parameter := Empty; + end if; + + -- Put first the RPC receiver corresponding to the remote package + + Append_To (Statements, + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (RTE (RE_Unsigned_64), Loc), + Attribute_Name => Name_Write, + Expressions => New_List ( + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Stream_Parameter, Loc), + Attribute_Name => + Name_Access), + Target_RPC_Receiver))); + + -- Then put the Subprogram_Id of the subprogram we want to call in + -- the stream. + + Append_To (Statements, + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (RTE (RE_Subprogram_Id), Loc), + Attribute_Name => + Name_Write, + Expressions => New_List ( + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Stream_Parameter, Loc), + Attribute_Name => Name_Access), + Subprogram_Id))); + + Current_Parameter := First (Ordered_Parameters_List); + while Present (Current_Parameter) loop + declare + Typ : constant Node_Id := + Parameter_Type (Current_Parameter); + Etyp : Entity_Id; + Constrained : Boolean; + Value : Node_Id; + Extra_Parameter : Entity_Id; + + begin + if Is_RACW_Controlling_Formal + (Current_Parameter, Stub_Type) + then + -- In the case of a controlling formal argument, we marshall + -- its addr field rather than the local stub. + + Append_To (Statements, + Pack_Node_Into_Stream (Loc, + Stream => Stream_Parameter, + Object => + Make_Selected_Component (Loc, + Prefix => + Defining_Identifier (Current_Parameter), + Selector_Name => Name_Addr), + Etyp => RTE (RE_Unsigned_64))); + + else + Value := New_Occurrence_Of + (Defining_Identifier (Current_Parameter), Loc); + + -- Access type parameters are transmitted as in out + -- parameters. However, a dereference is needed so that + -- we marshall the designated object. + + if Nkind (Typ) = N_Access_Definition then + Value := Make_Explicit_Dereference (Loc, Value); + Etyp := Etype (Subtype_Mark (Typ)); + else + Etyp := Etype (Typ); + end if; + + Constrained := + Is_Constrained (Etyp) or else Is_Elementary_Type (Etyp); + + -- Any parameter but unconstrained out parameters are + -- transmitted to the peer. + + if In_Present (Current_Parameter) + or else not Out_Present (Current_Parameter) + or else not Constrained + then + Append_To (Statements, + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Etyp, Loc), + Attribute_Name => + Output_From_Constrained (Constrained), + Expressions => New_List ( + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Stream_Parameter, Loc), + Attribute_Name => Name_Access), + Value))); + end if; + end if; + + -- If the current parameter has a dynamic constrained status, + -- then this status is transmitted as well. + -- This should be done for accessibility as well ??? + + if Nkind (Typ) /= N_Access_Definition + and then Need_Extra_Constrained (Current_Parameter) + then + -- In this block, we do not use the extra formal that has + -- been created because it does not exist at the time of + -- expansion when building calling stubs for remote access + -- to subprogram types. We create an extra variable of this + -- type and push it in the stream after the regular + -- parameters. + + Extra_Parameter := Make_Defining_Identifier + (Loc, New_Internal_Name ('P')); + + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Extra_Parameter, + Constant_Present => True, + Object_Definition => + New_Occurrence_Of (Standard_Boolean, Loc), + Expression => + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of ( + Defining_Identifier (Current_Parameter), Loc), + Attribute_Name => Name_Constrained))); + + Append_To (Extra_Formal_Statements, + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Standard_Boolean, Loc), + Attribute_Name => + Name_Write, + Expressions => New_List ( + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Stream_Parameter, Loc), + Attribute_Name => + Name_Access), + New_Occurrence_Of (Extra_Parameter, Loc)))); + end if; + + Next (Current_Parameter); + end; + end loop; + + -- Append the formal statements list to the statements + + Append_List_To (Statements, Extra_Formal_Statements); + + if not Is_Known_Non_Asynchronous then + + -- Build the call to System.RPC.Do_APC + + Asynchronous_Statements := New_List ( + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (RTE (RE_Do_Apc), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Target_Partition, Loc), + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Stream_Parameter, Loc), + Attribute_Name => + Name_Access)))); + else + Asynchronous_Statements := No_List; + end if; + + if not Is_Known_Asynchronous then + + -- Build the call to System.RPC.Do_RPC + + Non_Asynchronous_Statements := New_List ( + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (RTE (RE_Do_Rpc), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Target_Partition, Loc), + + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Stream_Parameter, Loc), + Attribute_Name => + Name_Access), + + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Result_Parameter, Loc), + Attribute_Name => + Name_Access)))); + + -- Read the exception occurrence from the result stream and + -- reraise it. It does no harm if this is a Null_Occurrence since + -- this does nothing. + + Append_To (Non_Asynchronous_Statements, + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (RTE (RE_Exception_Occurrence), Loc), + + Attribute_Name => + Name_Read, + + Expressions => New_List ( + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Result_Parameter, Loc), + Attribute_Name => + Name_Access), + New_Occurrence_Of (Exception_Return_Parameter, Loc)))); + + Append_To (Non_Asynchronous_Statements, + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (RTE (RE_Reraise_Occurrence), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Exception_Return_Parameter, Loc)))); + + if Is_Function then + + -- If this is a function call, then read the value and return + -- it. The return value is written/read using 'Output/'Input. + + Append_To (Non_Asynchronous_Statements, + Make_Tag_Check (Loc, + Make_Return_Statement (Loc, + Expression => + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of ( + Etype (Result_Definition (Spec)), Loc), + + Attribute_Name => Name_Input, + + Expressions => New_List ( + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Result_Parameter, Loc), + Attribute_Name => Name_Access)))))); + + else + -- Loop around parameters and assign out (or in out) + -- parameters. In the case of RACW, controlling arguments + -- cannot possibly have changed since they are remote, so we do + -- not read them from the stream. + + Current_Parameter := First (Ordered_Parameters_List); + while Present (Current_Parameter) loop + declare + Typ : constant Node_Id := + Parameter_Type (Current_Parameter); + Etyp : Entity_Id; + Value : Node_Id; + + begin + Value := + New_Occurrence_Of + (Defining_Identifier (Current_Parameter), Loc); + + if Nkind (Typ) = N_Access_Definition then + Value := Make_Explicit_Dereference (Loc, Value); + Etyp := Etype (Subtype_Mark (Typ)); + else + Etyp := Etype (Typ); + end if; + + if (Out_Present (Current_Parameter) + or else Nkind (Typ) = N_Access_Definition) + and then Etyp /= Stub_Type + then + Append_To (Non_Asynchronous_Statements, + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Etyp, Loc), + + Attribute_Name => Name_Read, + + Expressions => New_List ( + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Result_Parameter, Loc), + Attribute_Name => + Name_Access), + Value))); + end if; + end; + + Next (Current_Parameter); + end loop; + end if; + end if; + + if Is_Known_Asynchronous then + Append_List_To (Statements, Asynchronous_Statements); + + elsif Is_Known_Non_Asynchronous then + Append_List_To (Statements, Non_Asynchronous_Statements); + + else + pragma Assert (Present (Asynchronous)); + Prepend_To (Asynchronous_Statements, + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Standard_Boolean, Loc), + Attribute_Name => Name_Write, + Expressions => New_List ( + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Stream_Parameter, Loc), + Attribute_Name => Name_Access), + New_Occurrence_Of (Standard_True, Loc)))); + + Prepend_To (Non_Asynchronous_Statements, + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Standard_Boolean, Loc), + Attribute_Name => Name_Write, + Expressions => New_List ( + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Stream_Parameter, Loc), + Attribute_Name => Name_Access), + New_Occurrence_Of (Standard_False, Loc)))); + + Append_To (Statements, + Make_Implicit_If_Statement (Nod, + Condition => Asynchronous, + Then_Statements => Asynchronous_Statements, + Else_Statements => Non_Asynchronous_Statements)); + end if; + end Build_General_Calling_Stubs; + + ----------------------------- + -- Build_RPC_Receiver_Body -- + ----------------------------- + + procedure Build_RPC_Receiver_Body + (RPC_Receiver : Entity_Id; + Request : out Entity_Id; + Subp_Id : out Entity_Id; + Subp_Index : out Entity_Id; + Stmts : out List_Id; + Decl : out Node_Id) + is + Loc : constant Source_Ptr := Sloc (RPC_Receiver); + + RPC_Receiver_Spec : Node_Id; + RPC_Receiver_Decls : List_Id; + + begin + Request := Make_Defining_Identifier (Loc, Name_R); + + RPC_Receiver_Spec := + Build_RPC_Receiver_Specification + (RPC_Receiver => RPC_Receiver, + Request_Parameter => Request); + + Subp_Id := Make_Defining_Identifier (Loc, New_Internal_Name ('P')); + Subp_Index := Subp_Id; + + -- Subp_Id may not be a constant, because in the case of the RPC + -- receiver for an RCI package, when a call is received from a RAS + -- dereference, it will be assigned during subsequent processing. + + RPC_Receiver_Decls := New_List ( + Make_Object_Declaration (Loc, + Defining_Identifier => Subp_Id, + Object_Definition => + New_Occurrence_Of (RTE (RE_Subprogram_Id), Loc), + Expression => + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (RTE (RE_Subprogram_Id), Loc), + Attribute_Name => Name_Input, + Expressions => New_List ( + Make_Selected_Component (Loc, + Prefix => Request, + Selector_Name => Name_Params))))); + + Stmts := New_List; + + Decl := + Make_Subprogram_Body (Loc, + Specification => RPC_Receiver_Spec, + Declarations => RPC_Receiver_Decls, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => Stmts)); + end Build_RPC_Receiver_Body; + + ----------------------- + -- Build_Stub_Target -- + ----------------------- + + function Build_Stub_Target + (Loc : Source_Ptr; + Decls : List_Id; + RCI_Locator : Entity_Id; + Controlling_Parameter : Entity_Id) return RPC_Target + is + Target_Info : RPC_Target (PCS_Kind => Name_GARLIC_DSA); + begin + Target_Info.Partition := + Make_Defining_Identifier (Loc, New_Internal_Name ('P')); + if Present (Controlling_Parameter) then + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Target_Info.Partition, + Constant_Present => True, + Object_Definition => + New_Occurrence_Of (RTE (RE_Partition_ID), Loc), + + Expression => + Make_Selected_Component (Loc, + Prefix => Controlling_Parameter, + Selector_Name => Name_Origin))); + + Target_Info.RPC_Receiver := + Make_Selected_Component (Loc, + Prefix => Controlling_Parameter, + Selector_Name => Name_Receiver); + + else + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Target_Info.Partition, + Constant_Present => True, + Object_Definition => + New_Occurrence_Of (RTE (RE_Partition_ID), Loc), + + Expression => + Make_Function_Call (Loc, + Name => Make_Selected_Component (Loc, + Prefix => + Make_Identifier (Loc, Chars (RCI_Locator)), + Selector_Name => + Make_Identifier (Loc, + Name_Get_Active_Partition_ID))))); + + Target_Info.RPC_Receiver := + Make_Selected_Component (Loc, + Prefix => + Make_Identifier (Loc, Chars (RCI_Locator)), + Selector_Name => + Make_Identifier (Loc, Name_Get_RCI_Package_Receiver)); + end if; + return Target_Info; + end Build_Stub_Target; + + --------------------- + -- Build_Stub_Type -- + --------------------- + + procedure Build_Stub_Type + (RACW_Type : Entity_Id; + Stub_Type : Entity_Id; + Stub_Type_Decl : out Node_Id; + RPC_Receiver_Decl : out Node_Id) + is + Loc : constant Source_Ptr := Sloc (Stub_Type); + Is_RAS : constant Boolean := not Comes_From_Source (RACW_Type); + + begin + Stub_Type_Decl := + Make_Full_Type_Declaration (Loc, + Defining_Identifier => Stub_Type, + Type_Definition => + Make_Record_Definition (Loc, + Tagged_Present => True, + Limited_Present => True, + Component_List => + Make_Component_List (Loc, + Component_Items => New_List ( + + Make_Component_Declaration (Loc, + Defining_Identifier => + Make_Defining_Identifier (Loc, Name_Origin), + Component_Definition => + Make_Component_Definition (Loc, + Aliased_Present => False, + Subtype_Indication => + New_Occurrence_Of ( + RTE (RE_Partition_ID), Loc))), + + Make_Component_Declaration (Loc, + Defining_Identifier => + Make_Defining_Identifier (Loc, Name_Receiver), + Component_Definition => + Make_Component_Definition (Loc, + Aliased_Present => False, + Subtype_Indication => + New_Occurrence_Of (RTE (RE_Unsigned_64), Loc))), + + Make_Component_Declaration (Loc, + Defining_Identifier => + Make_Defining_Identifier (Loc, Name_Addr), + Component_Definition => + Make_Component_Definition (Loc, + Aliased_Present => False, + Subtype_Indication => + New_Occurrence_Of (RTE (RE_Unsigned_64), Loc))), + + Make_Component_Declaration (Loc, + Defining_Identifier => + Make_Defining_Identifier (Loc, Name_Asynchronous), + Component_Definition => + Make_Component_Definition (Loc, + Aliased_Present => False, + Subtype_Indication => + New_Occurrence_Of ( + Standard_Boolean, Loc))))))); + + if Is_RAS then + RPC_Receiver_Decl := Empty; + else + declare + RPC_Receiver_Request : constant Entity_Id := + Make_Defining_Identifier (Loc, Name_R); + begin + RPC_Receiver_Decl := + Make_Subprogram_Declaration (Loc, + Build_RPC_Receiver_Specification ( + RPC_Receiver => Make_Defining_Identifier (Loc, + New_Internal_Name ('R')), + Request_Parameter => RPC_Receiver_Request)); + end; + end if; + end Build_Stub_Type; + + -------------------------------------- + -- Build_Subprogram_Receiving_Stubs -- + -------------------------------------- + + function Build_Subprogram_Receiving_Stubs + (Vis_Decl : Node_Id; + Asynchronous : Boolean; + Dynamically_Asynchronous : Boolean := False; + Stub_Type : Entity_Id := Empty; + RACW_Type : Entity_Id := Empty; + Parent_Primitive : Entity_Id := Empty) return Node_Id + is + Loc : constant Source_Ptr := Sloc (Vis_Decl); + + Request_Parameter : Node_Id; + -- ??? + + Decls : constant List_Id := New_List; + -- All the parameters will get declared before calling the real + -- subprograms. Also the out parameters will be declared. + + Statements : constant List_Id := New_List; + + Extra_Formal_Statements : constant List_Id := New_List; + -- Statements concerning extra formal parameters + + After_Statements : constant List_Id := New_List; + -- Statements to be executed after the subprogram call + + Inner_Decls : List_Id := No_List; + -- In case of a function, the inner declarations are needed since + -- the result may be unconstrained. + + Excep_Handlers : List_Id := No_List; + Excep_Choice : Entity_Id; + Excep_Code : List_Id; + + Parameter_List : constant List_Id := New_List; + -- List of parameters to be passed to the subprogram + + Current_Parameter : Node_Id; + + Ordered_Parameters_List : constant List_Id := + Build_Ordered_Parameters_List + (Specification (Vis_Decl)); + + Subp_Spec : Node_Id; + -- Subprogram specification + + Called_Subprogram : Node_Id; + -- The subprogram to call + + Null_Raise_Statement : Node_Id; + + Dynamic_Async : Entity_Id; + + begin + if Present (RACW_Type) then + Called_Subprogram := + New_Occurrence_Of (Parent_Primitive, Loc); + else + Called_Subprogram := + New_Occurrence_Of ( + Defining_Unit_Name (Specification (Vis_Decl)), Loc); + end if; + + Request_Parameter := + Make_Defining_Identifier (Loc, New_Internal_Name ('R')); + + if Dynamically_Asynchronous then + Dynamic_Async := + Make_Defining_Identifier (Loc, New_Internal_Name ('S')); + else + Dynamic_Async := Empty; + end if; + + if not Asynchronous or Dynamically_Asynchronous then + + -- The first statement after the subprogram call is a statement to + -- writes a Null_Occurrence into the result stream. + + Null_Raise_Statement := + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (RTE (RE_Exception_Occurrence), Loc), + Attribute_Name => Name_Write, + Expressions => New_List ( + Make_Selected_Component (Loc, + Prefix => Request_Parameter, + Selector_Name => Name_Result), + New_Occurrence_Of (RTE (RE_Null_Occurrence), Loc))); + + if Dynamically_Asynchronous then + Null_Raise_Statement := + Make_Implicit_If_Statement (Vis_Decl, + Condition => + Make_Op_Not (Loc, New_Occurrence_Of (Dynamic_Async, Loc)), + Then_Statements => New_List (Null_Raise_Statement)); + end if; + + Append_To (After_Statements, Null_Raise_Statement); + end if; + + -- Loop through every parameter and get its value from the stream. If + -- the parameter is unconstrained, then the parameter is read using + -- 'Input at the point of declaration. + + Current_Parameter := First (Ordered_Parameters_List); + while Present (Current_Parameter) loop + declare + Etyp : Entity_Id; + Constrained : Boolean; + + Object : constant Entity_Id := + Make_Defining_Identifier (Loc, + New_Internal_Name ('P')); + + Expr : Node_Id := Empty; + + Is_Controlling_Formal : constant Boolean := + Is_RACW_Controlling_Formal + (Current_Parameter, Stub_Type); + + begin + Set_Ekind (Object, E_Variable); + + if Is_Controlling_Formal then + + -- We have a controlling formal parameter. Read its address + -- rather than a real object. The address is in Unsigned_64 + -- form. + + Etyp := RTE (RE_Unsigned_64); + else + Etyp := Etype (Parameter_Type (Current_Parameter)); + end if; + + Constrained := + Is_Constrained (Etyp) or else Is_Elementary_Type (Etyp); + + if In_Present (Current_Parameter) + or else not Out_Present (Current_Parameter) + or else not Constrained + or else Is_Controlling_Formal + then + -- If an input parameter is contrained, then its reading is + -- deferred until the beginning of the subprogram body. If + -- it is unconstrained, then an expression is built for + -- the object declaration and the variable is set using + -- 'Input instead of 'Read. + + if Constrained and then not Is_Controlling_Formal then + Append_To (Statements, + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Etyp, Loc), + Attribute_Name => Name_Read, + Expressions => New_List ( + Make_Selected_Component (Loc, + Prefix => Request_Parameter, + Selector_Name => Name_Params), + New_Occurrence_Of (Object, Loc)))); + + else + Expr := Input_With_Tag_Check (Loc, + Var_Type => Etyp, + Stream => Make_Selected_Component (Loc, + Prefix => Request_Parameter, + Selector_Name => Name_Params)); + Append_To (Decls, Expr); + Expr := Make_Function_Call (Loc, + New_Occurrence_Of (Defining_Unit_Name + (Specification (Expr)), Loc)); + end if; + end if; + + -- If we do not have to output the current parameter, then it + -- can well be flagged as constant. This may allow further + -- optimizations done by the back end. + + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Object, + Constant_Present => not Constrained + and then not Out_Present (Current_Parameter), + Object_Definition => + New_Occurrence_Of (Etyp, Loc), + Expression => Expr)); + + -- An out parameter may be written back using a 'Write + -- attribute instead of a 'Output because it has been + -- constrained by the parameter given to the caller. Note that + -- out controlling arguments in the case of a RACW are not put + -- back in the stream because the pointer on them has not + -- changed. + + if Out_Present (Current_Parameter) + and then + Etype (Parameter_Type (Current_Parameter)) /= Stub_Type + then + Append_To (After_Statements, + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Etyp, Loc), + Attribute_Name => Name_Write, + Expressions => New_List ( + Make_Selected_Component (Loc, + Prefix => Request_Parameter, + Selector_Name => Name_Result), + New_Occurrence_Of (Object, Loc)))); + end if; + + -- For RACW controlling formals, the Etyp of Object is always + -- an RACW, even if the parameter is not of an anonymous access + -- type. In such case, we need to dereference it at call time. + + if Is_Controlling_Formal then + if Nkind (Parameter_Type (Current_Parameter)) /= + N_Access_Definition + then + Append_To (Parameter_List, + Make_Parameter_Association (Loc, + Selector_Name => + New_Occurrence_Of ( + Defining_Identifier (Current_Parameter), Loc), + Explicit_Actual_Parameter => + Make_Explicit_Dereference (Loc, + Unchecked_Convert_To (RACW_Type, + OK_Convert_To (RTE (RE_Address), + New_Occurrence_Of (Object, Loc)))))); + + else + Append_To (Parameter_List, + Make_Parameter_Association (Loc, + Selector_Name => + New_Occurrence_Of ( + Defining_Identifier (Current_Parameter), Loc), + Explicit_Actual_Parameter => + Unchecked_Convert_To (RACW_Type, + OK_Convert_To (RTE (RE_Address), + New_Occurrence_Of (Object, Loc))))); + end if; + + else + Append_To (Parameter_List, + Make_Parameter_Association (Loc, + Selector_Name => + New_Occurrence_Of ( + Defining_Identifier (Current_Parameter), Loc), + Explicit_Actual_Parameter => + New_Occurrence_Of (Object, Loc))); + end if; + + -- If the current parameter needs an extra formal, then read it + -- from the stream and set the corresponding semantic field in + -- the variable. If the kind of the parameter identifier is + -- E_Void, then this is a compiler generated parameter that + -- doesn't need an extra constrained status. + + -- The case of Extra_Accessibility should also be handled ??? + + if Nkind (Parameter_Type (Current_Parameter)) /= + N_Access_Definition + and then + Ekind (Defining_Identifier (Current_Parameter)) /= E_Void + and then + Present (Extra_Constrained + (Defining_Identifier (Current_Parameter))) + then + declare + Extra_Parameter : constant Entity_Id := + Extra_Constrained + (Defining_Identifier + (Current_Parameter)); + + Formal_Entity : constant Entity_Id := + Make_Defining_Identifier + (Loc, Chars (Extra_Parameter)); + + Formal_Type : constant Entity_Id := + Etype (Extra_Parameter); + + begin + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Formal_Entity, + Object_Definition => + New_Occurrence_Of (Formal_Type, Loc))); + + Append_To (Extra_Formal_Statements, + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of ( + Formal_Type, Loc), + Attribute_Name => Name_Read, + Expressions => New_List ( + Make_Selected_Component (Loc, + Prefix => Request_Parameter, + Selector_Name => Name_Params), + New_Occurrence_Of (Formal_Entity, Loc)))); + Set_Extra_Constrained (Object, Formal_Entity); + end; + end if; + end; + + Next (Current_Parameter); + end loop; + + -- Append the formal statements list at the end of regular statements + + Append_List_To (Statements, Extra_Formal_Statements); + + if Nkind (Specification (Vis_Decl)) = N_Function_Specification then + + -- The remote subprogram is a function. We build an inner block to + -- be able to hold a potentially unconstrained result in a + -- variable. + + declare + Etyp : constant Entity_Id := + Etype (Result_Definition (Specification (Vis_Decl))); + Result : constant Node_Id := + Make_Defining_Identifier (Loc, + New_Internal_Name ('R')); + begin + Inner_Decls := New_List ( + Make_Object_Declaration (Loc, + Defining_Identifier => Result, + Constant_Present => True, + Object_Definition => New_Occurrence_Of (Etyp, Loc), + Expression => + Make_Function_Call (Loc, + Name => Called_Subprogram, + Parameter_Associations => Parameter_List))); + + Append_To (After_Statements, + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Etyp, Loc), + Attribute_Name => Name_Output, + Expressions => New_List ( + Make_Selected_Component (Loc, + Prefix => Request_Parameter, + Selector_Name => Name_Result), + New_Occurrence_Of (Result, Loc)))); + end; + + Append_To (Statements, + Make_Block_Statement (Loc, + Declarations => Inner_Decls, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => After_Statements))); + + else + -- The remote subprogram is a procedure. We do not need any inner + -- block in this case. + + if Dynamically_Asynchronous then + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Dynamic_Async, + Object_Definition => + New_Occurrence_Of (Standard_Boolean, Loc))); + + Append_To (Statements, + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Standard_Boolean, Loc), + Attribute_Name => Name_Read, + Expressions => New_List ( + Make_Selected_Component (Loc, + Prefix => Request_Parameter, + Selector_Name => Name_Params), + New_Occurrence_Of (Dynamic_Async, Loc)))); + end if; + + Append_To (Statements, + Make_Procedure_Call_Statement (Loc, + Name => Called_Subprogram, + Parameter_Associations => Parameter_List)); + + Append_List_To (Statements, After_Statements); + end if; + + if Asynchronous and then not Dynamically_Asynchronous then + + -- For an asynchronous procedure, add a null exception handler + + Excep_Handlers := New_List ( + Make_Exception_Handler (Loc, + Exception_Choices => New_List (Make_Others_Choice (Loc)), + Statements => New_List (Make_Null_Statement (Loc)))); + + else + -- In the other cases, if an exception is raised, then the + -- exception occurrence is copied into the output stream and + -- no other output parameter is written. + + Excep_Choice := + Make_Defining_Identifier (Loc, New_Internal_Name ('E')); + + Excep_Code := New_List ( + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (RTE (RE_Exception_Occurrence), Loc), + Attribute_Name => Name_Write, + Expressions => New_List ( + Make_Selected_Component (Loc, + Prefix => Request_Parameter, + Selector_Name => Name_Result), + New_Occurrence_Of (Excep_Choice, Loc)))); + + if Dynamically_Asynchronous then + Excep_Code := New_List ( + Make_Implicit_If_Statement (Vis_Decl, + Condition => Make_Op_Not (Loc, + New_Occurrence_Of (Dynamic_Async, Loc)), + Then_Statements => Excep_Code)); + end if; + + Excep_Handlers := New_List ( + Make_Exception_Handler (Loc, + Choice_Parameter => Excep_Choice, + Exception_Choices => New_List (Make_Others_Choice (Loc)), + Statements => Excep_Code)); + + end if; + + Subp_Spec := + Make_Procedure_Specification (Loc, + Defining_Unit_Name => + Make_Defining_Identifier (Loc, New_Internal_Name ('F')), + + Parameter_Specifications => New_List ( + Make_Parameter_Specification (Loc, + Defining_Identifier => Request_Parameter, + Parameter_Type => + New_Occurrence_Of (RTE (RE_Request_Access), Loc)))); + + return + Make_Subprogram_Body (Loc, + Specification => Subp_Spec, + Declarations => Decls, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => Statements, + Exception_Handlers => Excep_Handlers)); + end Build_Subprogram_Receiving_Stubs; + + ------------ + -- Result -- + ------------ + + function Result return Node_Id is + begin + return Make_Identifier (Loc, Name_V); + end Result; + + ---------------------- + -- Stream_Parameter -- + ---------------------- + + function Stream_Parameter return Node_Id is + begin + return Make_Identifier (Loc, Name_S); + end Stream_Parameter; + + end GARLIC_Support; + + ----------------------------- + -- Make_Selected_Component -- + ----------------------------- + + function Make_Selected_Component + (Loc : Source_Ptr; + Prefix : Entity_Id; + Selector_Name : Name_Id) return Node_Id + is + begin + return Make_Selected_Component (Loc, + Prefix => New_Occurrence_Of (Prefix, Loc), + Selector_Name => Make_Identifier (Loc, Selector_Name)); + end Make_Selected_Component; + + ----------------------- + -- Get_Subprogram_Id -- + ----------------------- + + function Get_Subprogram_Id (Def : Entity_Id) return String_Id is + begin + return Get_Subprogram_Ids (Def).Str_Identifier; + end Get_Subprogram_Id; + + ----------------------- + -- Get_Subprogram_Id -- + ----------------------- + + function Get_Subprogram_Id (Def : Entity_Id) return Int is + begin + return Get_Subprogram_Ids (Def).Int_Identifier; + end Get_Subprogram_Id; + + ------------------------ + -- Get_Subprogram_Ids -- + ------------------------ + + function Get_Subprogram_Ids + (Def : Entity_Id) return Subprogram_Identifiers + is + Result : Subprogram_Identifiers := + Subprogram_Identifier_Table.Get (Def); + + Current_Declaration : Node_Id; + Current_Subp : Entity_Id; + Current_Subp_Str : String_Id; + Current_Subp_Number : Int := First_RCI_Subprogram_Id; + + begin + if Result.Str_Identifier = No_String then + + -- We are looking up this subprogram's identifier outside of the + -- context of generating calling or receiving stubs. Hence we are + -- processing an 'Access attribute_reference for an RCI subprogram, + -- for the purpose of obtaining a RAS value. + + pragma Assert + (Is_Remote_Call_Interface (Scope (Def)) + and then + (Nkind (Parent (Def)) = N_Procedure_Specification + or else + Nkind (Parent (Def)) = N_Function_Specification)); + + Current_Declaration := + First (Visible_Declarations + (Package_Specification_Of_Scope (Scope (Def)))); + while Present (Current_Declaration) loop + if Nkind (Current_Declaration) = N_Subprogram_Declaration + and then Comes_From_Source (Current_Declaration) + then + Current_Subp := Defining_Unit_Name (Specification ( + Current_Declaration)); + Assign_Subprogram_Identifier + (Current_Subp, Current_Subp_Number, Current_Subp_Str); + + if Current_Subp = Def then + Result := (Current_Subp_Str, Current_Subp_Number); + end if; + + Current_Subp_Number := Current_Subp_Number + 1; + end if; + + Next (Current_Declaration); + end loop; + end if; + + pragma Assert (Result.Str_Identifier /= No_String); + return Result; + end Get_Subprogram_Ids; + + ---------- + -- Hash -- + ---------- + + function Hash (F : Entity_Id) return Hash_Index is + begin + return Hash_Index (Natural (F) mod Positive (Hash_Index'Last + 1)); + end Hash; + + function Hash (F : Name_Id) return Hash_Index is + begin + return Hash_Index (Natural (F) mod Positive (Hash_Index'Last + 1)); + end Hash; + + -------------------------- + -- Input_With_Tag_Check -- + -------------------------- + + function Input_With_Tag_Check + (Loc : Source_Ptr; + Var_Type : Entity_Id; + Stream : Node_Id) return Node_Id + is + begin + return + Make_Subprogram_Body (Loc, + Specification => Make_Function_Specification (Loc, + Defining_Unit_Name => + Make_Defining_Identifier (Loc, New_Internal_Name ('S')), + Result_Definition => New_Occurrence_Of (Var_Type, Loc)), + Declarations => No_List, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, New_List ( + Make_Tag_Check (Loc, + Make_Return_Statement (Loc, + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Var_Type, Loc), + Attribute_Name => Name_Input, + Expressions => + New_List (Stream))))))); + end Input_With_Tag_Check; + + -------------------------------- + -- Is_RACW_Controlling_Formal -- + -------------------------------- + + function Is_RACW_Controlling_Formal + (Parameter : Node_Id; + Stub_Type : Entity_Id) return Boolean + is + Typ : Entity_Id; + + begin + -- If the kind of the parameter is E_Void, then it is not a + -- controlling formal (this can happen in the context of RAS). + + if Ekind (Defining_Identifier (Parameter)) = E_Void then + return False; + end if; + + -- If the parameter is not a controlling formal, then it cannot + -- be possibly a RACW_Controlling_Formal. + + if not Is_Controlling_Formal (Defining_Identifier (Parameter)) then + return False; + end if; + + Typ := Parameter_Type (Parameter); + return (Nkind (Typ) = N_Access_Definition + and then Etype (Subtype_Mark (Typ)) = Stub_Type) + or else Etype (Typ) = Stub_Type; + end Is_RACW_Controlling_Formal; + + -------------------- + -- Make_Tag_Check -- + -------------------- + + function Make_Tag_Check (Loc : Source_Ptr; N : Node_Id) return Node_Id is + Occ : constant Entity_Id := + Make_Defining_Identifier (Loc, New_Internal_Name ('E')); + + begin + return Make_Block_Statement (Loc, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => New_List (N), + + Exception_Handlers => New_List ( + Make_Exception_Handler (Loc, + Choice_Parameter => Occ, + + Exception_Choices => + New_List (New_Occurrence_Of (RTE (RE_Tag_Error), Loc)), + + Statements => + New_List (Make_Procedure_Call_Statement (Loc, + New_Occurrence_Of + (RTE (RE_Raise_Program_Error_Unknown_Tag), Loc), + New_List (New_Occurrence_Of (Occ, Loc)))))))); + end Make_Tag_Check; + + ---------------------------- + -- Need_Extra_Constrained -- + ---------------------------- + + function Need_Extra_Constrained (Parameter : Node_Id) return Boolean is + Etyp : constant Entity_Id := Etype (Parameter_Type (Parameter)); + begin + return Out_Present (Parameter) + and then Has_Discriminants (Etyp) + and then not Is_Constrained (Etyp) + and then not Is_Indefinite_Subtype (Etyp); + end Need_Extra_Constrained; + + ------------------------------------ + -- Pack_Entity_Into_Stream_Access -- + ------------------------------------ + + function Pack_Entity_Into_Stream_Access + (Loc : Source_Ptr; + Stream : Node_Id; + Object : Entity_Id; + Etyp : Entity_Id := Empty) return Node_Id + is + Typ : Entity_Id; + + begin + if Present (Etyp) then + Typ := Etyp; + else + Typ := Etype (Object); + end if; + + return + Pack_Node_Into_Stream_Access (Loc, + Stream => Stream, + Object => New_Occurrence_Of (Object, Loc), + Etyp => Typ); + end Pack_Entity_Into_Stream_Access; + + --------------------------- + -- Pack_Node_Into_Stream -- + --------------------------- + + function Pack_Node_Into_Stream + (Loc : Source_Ptr; + Stream : Entity_Id; + Object : Node_Id; + Etyp : Entity_Id) return Node_Id + is + Write_Attribute : Name_Id := Name_Write; + + begin + if not Is_Constrained (Etyp) then + Write_Attribute := Name_Output; + end if; + + return + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Etyp, Loc), + Attribute_Name => Write_Attribute, + Expressions => New_List ( + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Stream, Loc), + Attribute_Name => Name_Access), + Object)); + end Pack_Node_Into_Stream; + + ---------------------------------- + -- Pack_Node_Into_Stream_Access -- + ---------------------------------- + + function Pack_Node_Into_Stream_Access + (Loc : Source_Ptr; + Stream : Node_Id; + Object : Node_Id; + Etyp : Entity_Id) return Node_Id + is + Write_Attribute : Name_Id := Name_Write; + + begin + if not Is_Constrained (Etyp) then + Write_Attribute := Name_Output; + end if; + + return + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Etyp, Loc), + Attribute_Name => Write_Attribute, + Expressions => New_List ( + Stream, + Object)); + end Pack_Node_Into_Stream_Access; + + --------------------- + -- PolyORB_Support -- + --------------------- + + package body PolyORB_Support is + + -- Local subprograms + + procedure Add_RACW_Read_Attribute + (RACW_Type : Entity_Id; + Stub_Type : Entity_Id; + Stub_Type_Access : Entity_Id; + Declarations : List_Id); + -- Add Read attribute in Decls for the RACW type. The Read attribute + -- is added right after the RACW_Type declaration while the body is + -- inserted after Declarations. + + procedure Add_RACW_Write_Attribute + (RACW_Type : Entity_Id; + Stub_Type : Entity_Id; + Stub_Type_Access : Entity_Id; + Declarations : List_Id); + -- Same thing for the Write attribute + + procedure Add_RACW_From_Any + (RACW_Type : Entity_Id; + Stub_Type : Entity_Id; + Stub_Type_Access : Entity_Id; + Declarations : List_Id); + -- Add the From_Any TSS for this RACW type + + procedure Add_RACW_To_Any + (Designated_Type : Entity_Id; + RACW_Type : Entity_Id; + Stub_Type : Entity_Id; + Stub_Type_Access : Entity_Id; + Declarations : List_Id); + -- Add the To_Any TSS for this RACW type + + procedure Add_RACW_TypeCode + (Designated_Type : Entity_Id; + RACW_Type : Entity_Id; + Declarations : List_Id); + -- Add the TypeCode TSS for this RACW type + + procedure Add_RAS_From_Any (RAS_Type : Entity_Id); + -- Add the From_Any TSS for this RAS type + + procedure Add_RAS_To_Any (RAS_Type : Entity_Id); + -- Add the To_Any TSS for this RAS type + + procedure Add_RAS_TypeCode (RAS_Type : Entity_Id); + -- Add the TypeCode TSS for this RAS type + + procedure Add_RAS_Access_TSS (N : Node_Id); + -- Add a subprogram body for RAS Access TSS + + ------------------------------------- + -- Add_Obj_RPC_Receiver_Completion -- + ------------------------------------- + + procedure Add_Obj_RPC_Receiver_Completion + (Loc : Source_Ptr; + Decls : List_Id; + RPC_Receiver : Entity_Id; + Stub_Elements : Stub_Structure) + is + Desig : constant Entity_Id := + Etype (Designated_Type (Stub_Elements.RACW_Type)); + begin + Append_To (Decls, + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of ( + RTE (RE_Register_Obj_Receiving_Stub), Loc), + + Parameter_Associations => New_List ( + + -- Name + + Make_String_Literal (Loc, + Full_Qualified_Name (Desig)), + + -- Handler + + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of ( + Defining_Unit_Name (Parent (RPC_Receiver)), Loc), + Attribute_Name => + Name_Access), + + -- Receiver + + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of ( + Defining_Identifier ( + Stub_Elements.RPC_Receiver_Decl), Loc), + Attribute_Name => + Name_Access)))); + end Add_Obj_RPC_Receiver_Completion; + + ----------------------- + -- Add_RACW_Features -- + ----------------------- + + procedure Add_RACW_Features + (RACW_Type : Entity_Id; + Desig : Entity_Id; + Stub_Type : Entity_Id; + Stub_Type_Access : Entity_Id; + RPC_Receiver_Decl : Node_Id; + Declarations : List_Id) + is + pragma Warnings (Off); + pragma Unreferenced (RPC_Receiver_Decl); + pragma Warnings (On); + + begin + Add_RACW_From_Any + (RACW_Type => RACW_Type, + Stub_Type => Stub_Type, + Stub_Type_Access => Stub_Type_Access, + Declarations => Declarations); + + Add_RACW_To_Any + (Designated_Type => Desig, + RACW_Type => RACW_Type, + Stub_Type => Stub_Type, + Stub_Type_Access => Stub_Type_Access, + Declarations => Declarations); + + -- In the PolyORB case, the RACW 'Read and 'Write attributes + -- are implemented in terms of the From_Any and To_Any TSSs, + -- so these TSSs must be expanded before 'Read and 'Write. + + Add_RACW_Write_Attribute + (RACW_Type => RACW_Type, + Stub_Type => Stub_Type, + Stub_Type_Access => Stub_Type_Access, + Declarations => Declarations); + + Add_RACW_Read_Attribute + (RACW_Type => RACW_Type, + Stub_Type => Stub_Type, + Stub_Type_Access => Stub_Type_Access, + Declarations => Declarations); + + Add_RACW_TypeCode + (Designated_Type => Desig, + RACW_Type => RACW_Type, + Declarations => Declarations); + end Add_RACW_Features; + + ----------------------- + -- Add_RACW_From_Any -- + ----------------------- + + procedure Add_RACW_From_Any + (RACW_Type : Entity_Id; + Stub_Type : Entity_Id; + Stub_Type_Access : Entity_Id; + Declarations : List_Id) + is + Loc : constant Source_Ptr := Sloc (RACW_Type); + Is_RAS : constant Boolean := not Comes_From_Source (RACW_Type); + + Fnam : constant Entity_Id := + Make_Defining_Identifier (Loc, New_Internal_Name ('F')); + + Func_Spec : Node_Id; + Func_Decl : Node_Id; + Func_Body : Node_Id; + + Decls : List_Id; + Statements : List_Id; + Stub_Statements : List_Id; + Local_Statements : List_Id; + -- Various parts of the subprogram + + Any_Parameter : constant Entity_Id := + Make_Defining_Identifier (Loc, Name_A); + Reference : constant Entity_Id := + Make_Defining_Identifier + (Loc, New_Internal_Name ('R')); + Is_Local : constant Entity_Id := + Make_Defining_Identifier + (Loc, New_Internal_Name ('L')); + Addr : constant Entity_Id := + Make_Defining_Identifier + (Loc, New_Internal_Name ('A')); + Local_Stub : constant Entity_Id := + Make_Defining_Identifier + (Loc, New_Internal_Name ('L')); + Stubbed_Result : constant Entity_Id := + Make_Defining_Identifier + (Loc, New_Internal_Name ('S')); + + Stub_Condition : Node_Id; + -- An expression that determines whether we create a stub for the + -- newly-unpacked RACW. Normally we create a stub only for remote + -- objects, but in the case of an RACW used to implement a RAS, + -- we also create a stub for local subprograms if a pragma + -- All_Calls_Remote applies. + + Asynchronous_Flag : constant Entity_Id := + Asynchronous_Flags_Table.Get (RACW_Type); + -- The flag object declared in Add_RACW_Asynchronous_Flag + + begin + -- Object declarations + + Decls := New_List ( + Make_Object_Declaration (Loc, + Defining_Identifier => + Reference, + Object_Definition => + New_Occurrence_Of (RTE (RE_Object_Ref), Loc), + Expression => + Make_Function_Call (Loc, + Name => + New_Occurrence_Of (RTE (RE_FA_ObjRef), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Any_Parameter, Loc)))), + + Make_Object_Declaration (Loc, + Defining_Identifier => Local_Stub, + Aliased_Present => True, + Object_Definition => New_Occurrence_Of (Stub_Type, Loc)), + + Make_Object_Declaration (Loc, + Defining_Identifier => Stubbed_Result, + Object_Definition => + New_Occurrence_Of (Stub_Type_Access, Loc), + Expression => + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Local_Stub, Loc), + Attribute_Name => + Name_Unchecked_Access)), + + Make_Object_Declaration (Loc, + Defining_Identifier => Is_Local, + Object_Definition => + New_Occurrence_Of (Standard_Boolean, Loc)), + + Make_Object_Declaration (Loc, + Defining_Identifier => Addr, + Object_Definition => + New_Occurrence_Of (RTE (RE_Address), Loc))); + + -- Build_Get_Unique_RP_Call needs the type of Stubbed_Result + + Set_Etype (Stubbed_Result, Stub_Type_Access); + + -- If the ref Is_Nil, return a null pointer + + Statements := New_List ( + Make_Implicit_If_Statement (RACW_Type, + Condition => + Make_Function_Call (Loc, + Name => + New_Occurrence_Of (RTE (RE_Is_Nil), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Reference, Loc))), + Then_Statements => New_List ( + Make_Return_Statement (Loc, + Expression => + Make_Null (Loc))))); + + Append_To (Statements, + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (RTE (RE_Get_Local_Address), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Reference, Loc), + New_Occurrence_Of (Is_Local, Loc), + New_Occurrence_Of (Addr, Loc)))); + + -- If the object is located on another partition, then a stub object + -- will be created with all the information needed to rebuild the + -- real object at the other end. This stanza is always used in the + -- case of RAS types, for which a stub is required even for local + -- subprograms. + + Stub_Statements := New_List ( + Make_Assignment_Statement (Loc, + Name => Make_Selected_Component (Loc, + Prefix => Stubbed_Result, + Selector_Name => Name_Target), + Expression => + Make_Function_Call (Loc, + Name => + New_Occurrence_Of (RTE (RE_Entity_Of), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Reference, Loc)))), + + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (RTE (RE_Inc_Usage), Loc), + Parameter_Associations => New_List ( + Make_Selected_Component (Loc, + Prefix => Stubbed_Result, + Selector_Name => Name_Target))), + + Make_Assignment_Statement (Loc, + Name => Make_Selected_Component (Loc, + Prefix => Stubbed_Result, + Selector_Name => Name_Asynchronous), + Expression => + New_Occurrence_Of (Asynchronous_Flag, Loc))); + + -- ??? Issue with asynchronous calls here: the Asynchronous + -- flag is set on the stub type if, and only if, the RACW type + -- has a pragma Asynchronous. This is incorrect for RACWs that + -- implement RAS types, because in that case the /designated + -- subprogram/ (not the type) might be asynchronous, and + -- that causes the stub to need to be asynchronous too. + -- A solution is to transport a RAS as a struct containing + -- a RACW and an asynchronous flag, and to properly alter + -- the Asynchronous component in the stub type in the RAS's + -- _From_Any TSS. + + Append_List_To (Stub_Statements, + Build_Get_Unique_RP_Call (Loc, Stubbed_Result, Stub_Type)); + + -- Distinguish between the local and remote cases, and execute the + -- appropriate piece of code. + + Stub_Condition := New_Occurrence_Of (Is_Local, Loc); + + if Is_RAS then + Stub_Condition := Make_And_Then (Loc, + Left_Opnd => + Stub_Condition, + Right_Opnd => + Make_Selected_Component (Loc, + Prefix => + Unchecked_Convert_To ( + RTE (RE_RAS_Proxy_Type_Access), + New_Occurrence_Of (Addr, Loc)), + Selector_Name => + Make_Identifier (Loc, + Name_All_Calls_Remote))); + end if; + + Local_Statements := New_List ( + Make_Return_Statement (Loc, + Expression => + Unchecked_Convert_To (RACW_Type, + New_Occurrence_Of (Addr, Loc)))); + + Append_To (Statements, + Make_Implicit_If_Statement (RACW_Type, + Condition => + Stub_Condition, + Then_Statements => Local_Statements, + Else_Statements => Stub_Statements)); + + Append_To (Statements, + Make_Return_Statement (Loc, + Expression => Unchecked_Convert_To (RACW_Type, + New_Occurrence_Of (Stubbed_Result, Loc)))); + + Func_Spec := + Make_Function_Specification (Loc, + Defining_Unit_Name => + Fnam, + Parameter_Specifications => New_List ( + Make_Parameter_Specification (Loc, + Defining_Identifier => + Any_Parameter, + Parameter_Type => + New_Occurrence_Of (RTE (RE_Any), Loc))), + Result_Definition => New_Occurrence_Of (RACW_Type, Loc)); + + -- NOTE: The usage occurrences of RACW_Parameter must + -- refer to the entity in the declaration spec, not those + -- of the body spec. + + Func_Decl := Make_Subprogram_Declaration (Loc, Func_Spec); + + Func_Body := + Make_Subprogram_Body (Loc, + Specification => + Copy_Specification (Loc, Func_Spec), + Declarations => Decls, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => Statements)); + + Insert_After (Declaration_Node (RACW_Type), Func_Decl); + Append_To (Declarations, Func_Body); + + Set_Renaming_TSS (RACW_Type, Fnam, TSS_From_Any); + end Add_RACW_From_Any; + + ----------------------------- + -- Add_RACW_Read_Attribute -- + ----------------------------- + + procedure Add_RACW_Read_Attribute + (RACW_Type : Entity_Id; + Stub_Type : Entity_Id; + Stub_Type_Access : Entity_Id; + Declarations : List_Id) + is + pragma Warnings (Off); + pragma Unreferenced (Stub_Type, Stub_Type_Access); + pragma Warnings (On); + Loc : constant Source_Ptr := Sloc (RACW_Type); + + Proc_Decl : Node_Id; + Attr_Decl : Node_Id; + + Body_Node : Node_Id; + + Decls : List_Id; + Statements : List_Id; + -- Various parts of the procedure + + Procedure_Name : constant Name_Id := + New_Internal_Name ('R'); + Source_Ref : constant Entity_Id := + Make_Defining_Identifier + (Loc, New_Internal_Name ('R')); + Asynchronous_Flag : constant Entity_Id := + Asynchronous_Flags_Table.Get (RACW_Type); + pragma Assert (Present (Asynchronous_Flag)); + + function Stream_Parameter return Node_Id; + function Result return Node_Id; + -- Functions to create occurrences of the formal parameter names + + ------------ + -- Result -- + ------------ + + function Result return Node_Id is + begin + return Make_Identifier (Loc, Name_V); + end Result; + + ---------------------- + -- Stream_Parameter -- + ---------------------- + + function Stream_Parameter return Node_Id is + begin + return Make_Identifier (Loc, Name_S); + end Stream_Parameter; + + -- Start of processing for Add_RACW_Read_Attribute + + begin + -- Generate object declarations + + Decls := New_List ( + Make_Object_Declaration (Loc, + Defining_Identifier => Source_Ref, + Object_Definition => + New_Occurrence_Of (RTE (RE_Object_Ref), Loc))); + + Statements := New_List ( + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (RTE (RE_Object_Ref), Loc), + Attribute_Name => Name_Read, + Expressions => New_List ( + Stream_Parameter, + New_Occurrence_Of (Source_Ref, Loc))), + Make_Assignment_Statement (Loc, + Name => + Result, + Expression => + PolyORB_Support.Helpers.Build_From_Any_Call ( + RACW_Type, + Make_Function_Call (Loc, + Name => + New_Occurrence_Of (RTE (RE_TA_ObjRef), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Source_Ref, Loc))), + Decls))); + + Build_Stream_Procedure + (Loc, RACW_Type, Body_Node, + Make_Defining_Identifier (Loc, Procedure_Name), + Statements, Outp => True); + Set_Declarations (Body_Node, Decls); + + Proc_Decl := Make_Subprogram_Declaration (Loc, + Copy_Specification (Loc, Specification (Body_Node))); + + Attr_Decl := + Make_Attribute_Definition_Clause (Loc, + Name => New_Occurrence_Of (RACW_Type, Loc), + Chars => Name_Read, + Expression => + New_Occurrence_Of ( + Defining_Unit_Name (Specification (Proc_Decl)), Loc)); + + Insert_After (Declaration_Node (RACW_Type), Proc_Decl); + Insert_After (Proc_Decl, Attr_Decl); + Append_To (Declarations, Body_Node); + end Add_RACW_Read_Attribute; + + --------------------- + -- Add_RACW_To_Any -- + --------------------- + + procedure Add_RACW_To_Any + (Designated_Type : Entity_Id; + RACW_Type : Entity_Id; + Stub_Type : Entity_Id; + Stub_Type_Access : Entity_Id; + Declarations : List_Id) + is + Loc : constant Source_Ptr := Sloc (RACW_Type); + + Is_RAS : constant Boolean := not Comes_From_Source (RACW_Type); + + Fnam : Entity_Id; + + Stub_Elements : constant Stub_Structure := + Stubs_Table.Get (Designated_Type); + pragma Assert (Stub_Elements /= Empty_Stub_Structure); + + Func_Spec : Node_Id; + Func_Decl : Node_Id; + Func_Body : Node_Id; + + Decls : List_Id; + Statements : List_Id; + Null_Statements : List_Id; + Local_Statements : List_Id := No_List; + Stub_Statements : List_Id; + If_Node : Node_Id; + -- Various parts of the subprogram + + RACW_Parameter : constant Entity_Id + := Make_Defining_Identifier (Loc, Name_R); + + Reference : constant Entity_Id := + Make_Defining_Identifier + (Loc, New_Internal_Name ('R')); + Any : constant Entity_Id := + Make_Defining_Identifier + (Loc, New_Internal_Name ('A')); + + begin + -- Object declarations + + Decls := New_List ( + Make_Object_Declaration (Loc, + Defining_Identifier => + Reference, + Object_Definition => + New_Occurrence_Of (RTE (RE_Object_Ref), Loc)), + Make_Object_Declaration (Loc, + Defining_Identifier => + Any, + Object_Definition => + New_Occurrence_Of (RTE (RE_Any), Loc))); + + -- If the object is null, nothing to do (Reference is already + -- a Nil ref.) + + Null_Statements := New_List (Make_Null_Statement (Loc)); + + if Is_RAS then + + -- If the object is a RAS designating a local subprogram, + -- we already have a target reference. + + Local_Statements := New_List ( + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (RTE (RE_Set_Ref), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Reference, Loc), + Make_Selected_Component (Loc, + Prefix => + Unchecked_Convert_To (RTE (RE_RAS_Proxy_Type_Access), + New_Occurrence_Of (RACW_Parameter, Loc)), + Selector_Name => Make_Identifier (Loc, Name_Target))))); + + else + -- If the object is a local RACW object, use Get_Reference now + -- to obtain a reference. + + Local_Statements := New_List ( + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (RTE (RE_Get_Reference), Loc), + Parameter_Associations => New_List ( + Unchecked_Convert_To ( + RTE (RE_Address), + New_Occurrence_Of (RACW_Parameter, Loc)), + Make_String_Literal (Loc, + Full_Qualified_Name (Designated_Type)), + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of ( + Defining_Identifier ( + Stub_Elements.RPC_Receiver_Decl), Loc), + Attribute_Name => + Name_Access), + New_Occurrence_Of (Reference, Loc)))); + end if; + + -- If the object is located on another partition, use the target + -- from the stub. + + Stub_Statements := New_List ( + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (RTE (RE_Set_Ref), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Reference, Loc), + Make_Selected_Component (Loc, + Prefix => Unchecked_Convert_To (Stub_Type_Access, + New_Occurrence_Of (RACW_Parameter, Loc)), + Selector_Name => + Make_Identifier (Loc, Name_Target))))); + + -- Distinguish between the null, local and remote cases, + -- and execute the appropriate piece of code. + + If_Node := + Make_Implicit_If_Statement (RACW_Type, + Condition => + Make_Op_Eq (Loc, + Left_Opnd => New_Occurrence_Of (RACW_Parameter, Loc), + Right_Opnd => Make_Null (Loc)), + Then_Statements => Null_Statements, + Elsif_Parts => New_List ( + Make_Elsif_Part (Loc, + Condition => + Make_Op_Ne (Loc, + Left_Opnd => + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (RACW_Parameter, Loc), + Attribute_Name => Name_Tag), + Right_Opnd => + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Stub_Type, Loc), + Attribute_Name => Name_Tag)), + Then_Statements => Local_Statements)), + Else_Statements => Stub_Statements); + + Statements := New_List ( + If_Node, + Make_Assignment_Statement (Loc, + Name => + New_Occurrence_Of (Any, Loc), + Expression => + Make_Function_Call (Loc, + Name => New_Occurrence_Of (RTE (RE_TA_ObjRef), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Reference, Loc)))), + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (RTE (RE_Set_TC), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Any, Loc), + Make_Selected_Component (Loc, + Prefix => + Defining_Identifier ( + Stub_Elements.RPC_Receiver_Decl), + Selector_Name => Name_Obj_TypeCode))), + Make_Return_Statement (Loc, + Expression => + New_Occurrence_Of (Any, Loc))); + + Fnam := Make_Defining_Identifier ( + Loc, New_Internal_Name ('T')); + + Func_Spec := + Make_Function_Specification (Loc, + Defining_Unit_Name => + Fnam, + Parameter_Specifications => New_List ( + Make_Parameter_Specification (Loc, + Defining_Identifier => + RACW_Parameter, + Parameter_Type => + New_Occurrence_Of (RACW_Type, Loc))), + Result_Definition => New_Occurrence_Of (RTE (RE_Any), Loc)); + + -- NOTE: The usage occurrences of RACW_Parameter must + -- refer to the entity in the declaration spec, not in + -- the body spec. + + Func_Decl := Make_Subprogram_Declaration (Loc, Func_Spec); + + Func_Body := + Make_Subprogram_Body (Loc, + Specification => + Copy_Specification (Loc, Func_Spec), + Declarations => Decls, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => Statements)); + + Insert_After (Declaration_Node (RACW_Type), Func_Decl); + Append_To (Declarations, Func_Body); + + Set_Renaming_TSS (RACW_Type, Fnam, TSS_To_Any); + end Add_RACW_To_Any; + + ----------------------- + -- Add_RACW_TypeCode -- + ----------------------- + + procedure Add_RACW_TypeCode + (Designated_Type : Entity_Id; + RACW_Type : Entity_Id; + Declarations : List_Id) + is + Loc : constant Source_Ptr := Sloc (RACW_Type); + + Fnam : Entity_Id; + + Stub_Elements : constant Stub_Structure := + Stubs_Table.Get (Designated_Type); + pragma Assert (Stub_Elements /= Empty_Stub_Structure); + + Func_Spec : Node_Id; + Func_Decl : Node_Id; + Func_Body : Node_Id; + + begin + Fnam := + Make_Defining_Identifier (Loc, + Chars => New_Internal_Name ('T')); + + -- The spec for this subprogram has a dummy 'access RACW' + -- argument, which serves only for overloading purposes. + + Func_Spec := + Make_Function_Specification (Loc, + Defining_Unit_Name => + Fnam, + Result_Definition => New_Occurrence_Of (RTE (RE_TypeCode), Loc)); + + -- NOTE: The usage occurrences of RACW_Parameter must + -- refer to the entity in the declaration spec, not those + -- of the body spec. + + Func_Decl := Make_Subprogram_Declaration (Loc, Func_Spec); + + Func_Body := + Make_Subprogram_Body (Loc, + Specification => + Copy_Specification (Loc, Func_Spec), + Declarations => Empty_List, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => New_List ( + Make_Return_Statement (Loc, + Expression => + Make_Selected_Component (Loc, + Prefix => + Defining_Identifier ( + Stub_Elements.RPC_Receiver_Decl), + Selector_Name => Name_Obj_TypeCode))))); + + Insert_After (Declaration_Node (RACW_Type), Func_Decl); + Append_To (Declarations, Func_Body); + + Set_Renaming_TSS (RACW_Type, Fnam, TSS_TypeCode); + end Add_RACW_TypeCode; + + ------------------------------ + -- Add_RACW_Write_Attribute -- + ------------------------------ + + procedure Add_RACW_Write_Attribute + (RACW_Type : Entity_Id; + Stub_Type : Entity_Id; + Stub_Type_Access : Entity_Id; + Declarations : List_Id) + is + Loc : constant Source_Ptr := Sloc (RACW_Type); + pragma Warnings (Off); + pragma Unreferenced ( + Stub_Type, + Stub_Type_Access); + + Is_RAS : constant Boolean := not Comes_From_Source (RACW_Type); + pragma Unreferenced (Is_RAS); + pragma Warnings (On); + + Body_Node : Node_Id; + Proc_Decl : Node_Id; + Attr_Decl : Node_Id; + + Statements : List_Id; + Procedure_Name : constant Name_Id := New_Internal_Name ('R'); + + function Stream_Parameter return Node_Id; + function Object return Node_Id; + -- Functions to create occurrences of the formal parameter names + + ------------ + -- Object -- + ------------ + + function Object return Node_Id is + Object_Ref : constant Node_Id := + Make_Identifier (Loc, Name_V); + + begin + -- Etype must be set for Build_To_Any_Call + + Set_Etype (Object_Ref, RACW_Type); + + return Object_Ref; + end Object; + + ---------------------- + -- Stream_Parameter -- + ---------------------- + + function Stream_Parameter return Node_Id is + begin + return Make_Identifier (Loc, Name_S); + end Stream_Parameter; + + -- Start of processing for Add_RACW_Write_Attribute + + begin + Statements := New_List ( + Pack_Node_Into_Stream_Access (Loc, + Stream => Stream_Parameter, + Object => + Make_Function_Call (Loc, + Name => + New_Occurrence_Of (RTE (RE_FA_ObjRef), Loc), + Parameter_Associations => New_List ( + PolyORB_Support.Helpers.Build_To_Any_Call + (Object, Declarations))), + Etyp => RTE (RE_Object_Ref))); + + Build_Stream_Procedure + (Loc, RACW_Type, Body_Node, + Make_Defining_Identifier (Loc, Procedure_Name), + Statements, Outp => False); + + Proc_Decl := + Make_Subprogram_Declaration (Loc, + Copy_Specification (Loc, Specification (Body_Node))); + + Attr_Decl := + Make_Attribute_Definition_Clause (Loc, + Name => New_Occurrence_Of (RACW_Type, Loc), + Chars => Name_Write, + Expression => + New_Occurrence_Of ( + Defining_Unit_Name (Specification (Proc_Decl)), Loc)); + + Insert_After (Declaration_Node (RACW_Type), Proc_Decl); + Insert_After (Proc_Decl, Attr_Decl); + Append_To (Declarations, Body_Node); + end Add_RACW_Write_Attribute; + + ----------------------- + -- Add_RAST_Features -- + ----------------------- + + procedure Add_RAST_Features + (Vis_Decl : Node_Id; + RAS_Type : Entity_Id) + is + begin + Add_RAS_Access_TSS (Vis_Decl); + + Add_RAS_From_Any (RAS_Type); + Add_RAS_TypeCode (RAS_Type); + + -- To_Any uses TypeCode, and therefore needs to be generated last + + Add_RAS_To_Any (RAS_Type); + end Add_RAST_Features; + + ------------------------ + -- Add_RAS_Access_TSS -- + ------------------------ + + procedure Add_RAS_Access_TSS (N : Node_Id) is + Loc : constant Source_Ptr := Sloc (N); + + Ras_Type : constant Entity_Id := Defining_Identifier (N); + Fat_Type : constant Entity_Id := Equivalent_Type (Ras_Type); + -- Ras_Type is the access to subprogram type; Fat_Type is the + -- corresponding record type. + + RACW_Type : constant Entity_Id := + Underlying_RACW_Type (Ras_Type); + Desig : constant Entity_Id := + Etype (Designated_Type (RACW_Type)); + + Stub_Elements : constant Stub_Structure := + Stubs_Table.Get (Desig); + pragma Assert (Stub_Elements /= Empty_Stub_Structure); + + Proc : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => Make_TSS_Name (Ras_Type, TSS_RAS_Access)); + + Proc_Spec : Node_Id; + + -- Formal parameters + + Package_Name : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => Name_P); + + -- Target package + + Subp_Id : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => Name_S); + + -- Target subprogram + + Asynch_P : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => Name_Asynchronous); + -- Is the procedure to which the 'Access applies asynchronous? + + All_Calls_Remote : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => Name_All_Calls_Remote); + -- True if an All_Calls_Remote pragma applies to the RCI unit + -- that contains the subprogram. + + -- Common local variables + + Proc_Decls : List_Id; + Proc_Statements : List_Id; + + Subp_Ref : constant Entity_Id := + Make_Defining_Identifier (Loc, Name_R); + -- Reference that designates the target subprogram (returned + -- by Get_RAS_Info). + + Is_Local : constant Entity_Id := + Make_Defining_Identifier (Loc, Name_L); + Local_Addr : constant Entity_Id := + Make_Defining_Identifier (Loc, Name_A); + -- For the call to Get_Local_Address + + -- Additional local variables for the remote case + + Local_Stub : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => New_Internal_Name ('L')); + + Stub_Ptr : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => New_Internal_Name ('S')); + + function Set_Field + (Field_Name : Name_Id; + Value : Node_Id) return Node_Id; + -- Construct an assignment that sets the named component in the + -- returned record + + --------------- + -- Set_Field -- + --------------- + + function Set_Field + (Field_Name : Name_Id; + Value : Node_Id) return Node_Id + is + begin + return + Make_Assignment_Statement (Loc, + Name => + Make_Selected_Component (Loc, + Prefix => Stub_Ptr, + Selector_Name => Field_Name), + Expression => Value); + end Set_Field; + + -- Start of processing for Add_RAS_Access_TSS + + begin + Proc_Decls := New_List ( + + -- Common declarations + + Make_Object_Declaration (Loc, + Defining_Identifier => Subp_Ref, + Object_Definition => + New_Occurrence_Of (RTE (RE_Object_Ref), Loc)), + + Make_Object_Declaration (Loc, + Defining_Identifier => Is_Local, + Object_Definition => + New_Occurrence_Of (Standard_Boolean, Loc)), + + Make_Object_Declaration (Loc, + Defining_Identifier => Local_Addr, + Object_Definition => + New_Occurrence_Of (RTE (RE_Address), Loc)), + + Make_Object_Declaration (Loc, + Defining_Identifier => Local_Stub, + Aliased_Present => True, + Object_Definition => + New_Occurrence_Of (Stub_Elements.Stub_Type, Loc)), + + Make_Object_Declaration (Loc, + Defining_Identifier => + Stub_Ptr, + Object_Definition => + New_Occurrence_Of (Stub_Elements.Stub_Type_Access, Loc), + Expression => + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Local_Stub, Loc), + Attribute_Name => Name_Unchecked_Access))); + + Set_Etype (Stub_Ptr, Stub_Elements.Stub_Type_Access); + -- Build_Get_Unique_RP_Call needs this information + + -- Get_RAS_Info (Pkg, Subp, R); + -- Obtain a reference to the target subprogram + + Proc_Statements := New_List ( + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (RTE (RE_Get_RAS_Info), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Package_Name, Loc), + New_Occurrence_Of (Subp_Id, Loc), + New_Occurrence_Of (Subp_Ref, Loc))), + + -- Get_Local_Address (R, L, A); + -- Determine whether the subprogram is local (L), and if so + -- obtain the local address of its proxy (A). + + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (RTE (RE_Get_Local_Address), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Subp_Ref, Loc), + New_Occurrence_Of (Is_Local, Loc), + New_Occurrence_Of (Local_Addr, Loc)))); + + -- Note: Here we assume that the Fat_Type is a record containing just + -- an access to a proxy or stub object. + + Append_To (Proc_Statements, + + -- if L then + + Make_Implicit_If_Statement (N, + Condition => + New_Occurrence_Of (Is_Local, Loc), + + Then_Statements => New_List ( + + -- if A.Target = null then + + Make_Implicit_If_Statement (N, + Condition => + Make_Op_Eq (Loc, + Make_Selected_Component (Loc, + Prefix => + Unchecked_Convert_To ( + RTE (RE_RAS_Proxy_Type_Access), + New_Occurrence_Of (Local_Addr, Loc)), + Selector_Name => + Make_Identifier (Loc, Name_Target)), + Make_Null (Loc)), + + Then_Statements => New_List ( + + -- A.Target := Entity_Of (Ref); + + Make_Assignment_Statement (Loc, + Name => + Make_Selected_Component (Loc, + Prefix => + Unchecked_Convert_To ( + RTE (RE_RAS_Proxy_Type_Access), + New_Occurrence_Of (Local_Addr, Loc)), + Selector_Name => + Make_Identifier (Loc, Name_Target)), + Expression => + Make_Function_Call (Loc, + Name => + New_Occurrence_Of (RTE (RE_Entity_Of), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Subp_Ref, Loc)))), + + -- Inc_Usage (A.Target); + + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (RTE (RE_Inc_Usage), Loc), + Parameter_Associations => New_List ( + Make_Selected_Component (Loc, + Prefix => + Unchecked_Convert_To ( + RTE (RE_RAS_Proxy_Type_Access), + New_Occurrence_Of (Local_Addr, Loc)), + Selector_Name => Make_Identifier (Loc, + Name_Target)))))), + + -- end if; + -- if not All_Calls_Remote then + -- return Fat_Type!(A); + -- end if; + + Make_Implicit_If_Statement (N, + Condition => + Make_Op_Not (Loc, + New_Occurrence_Of (All_Calls_Remote, Loc)), + + Then_Statements => New_List ( + Make_Return_Statement (Loc, + Unchecked_Convert_To (Fat_Type, + New_Occurrence_Of (Local_Addr, Loc)))))))); + + Append_List_To (Proc_Statements, New_List ( + + -- Stub.Target := Entity_Of (Ref); + + Set_Field (Name_Target, + Make_Function_Call (Loc, + Name => + New_Occurrence_Of (RTE (RE_Entity_Of), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Subp_Ref, Loc)))), + + -- Inc_Usage (Stub.Target); + + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (RTE (RE_Inc_Usage), Loc), + Parameter_Associations => New_List ( + Make_Selected_Component (Loc, + Prefix => Stub_Ptr, + Selector_Name => Name_Target))), + + -- E.4.1(9) A remote call is asynchronous if it is a call to + -- a procedure, or a call through a value of an access-to-procedure + -- type, to which a pragma Asynchronous applies. + + -- Parameter Asynch_P is true when the procedure is asynchronous; + -- Expression Asynch_T is true when the type is asynchronous. + + Set_Field (Name_Asynchronous, + Make_Or_Else (Loc, + New_Occurrence_Of (Asynch_P, Loc), + New_Occurrence_Of (Boolean_Literals ( + Is_Asynchronous (Ras_Type)), Loc))))); + + Append_List_To (Proc_Statements, + Build_Get_Unique_RP_Call (Loc, + Stub_Ptr, Stub_Elements.Stub_Type)); + + Append_To (Proc_Statements, + Make_Return_Statement (Loc, + Expression => + Unchecked_Convert_To (Fat_Type, + New_Occurrence_Of (Stub_Ptr, Loc)))); + + Proc_Spec := + Make_Function_Specification (Loc, + Defining_Unit_Name => Proc, + Parameter_Specifications => New_List ( + Make_Parameter_Specification (Loc, + Defining_Identifier => Package_Name, + Parameter_Type => + New_Occurrence_Of (Standard_String, Loc)), + + Make_Parameter_Specification (Loc, + Defining_Identifier => Subp_Id, + Parameter_Type => + New_Occurrence_Of (Standard_String, Loc)), + + Make_Parameter_Specification (Loc, + Defining_Identifier => Asynch_P, + Parameter_Type => + New_Occurrence_Of (Standard_Boolean, Loc)), + + Make_Parameter_Specification (Loc, + Defining_Identifier => All_Calls_Remote, + Parameter_Type => + New_Occurrence_Of (Standard_Boolean, Loc))), + + Result_Definition => + New_Occurrence_Of (Fat_Type, Loc)); + + -- Set the kind and return type of the function to prevent + -- ambiguities between Ras_Type and Fat_Type in subsequent analysis. + + Set_Ekind (Proc, E_Function); + Set_Etype (Proc, Fat_Type); + + Discard_Node ( + Make_Subprogram_Body (Loc, + Specification => Proc_Spec, + Declarations => Proc_Decls, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => Proc_Statements))); + + Set_TSS (Fat_Type, Proc); + end Add_RAS_Access_TSS; + + ---------------------- + -- Add_RAS_From_Any -- + ---------------------- + + procedure Add_RAS_From_Any (RAS_Type : Entity_Id) is + Loc : constant Source_Ptr := Sloc (RAS_Type); + + Fnam : constant Entity_Id := Make_Defining_Identifier (Loc, + Make_TSS_Name (RAS_Type, TSS_From_Any)); + + Func_Spec : Node_Id; + + Statements : List_Id; + + Any_Parameter : constant Entity_Id := + Make_Defining_Identifier (Loc, Name_A); + + begin + Statements := New_List ( + Make_Return_Statement (Loc, + Expression => + Make_Aggregate (Loc, + Component_Associations => New_List ( + Make_Component_Association (Loc, + Choices => New_List ( + Make_Identifier (Loc, Name_Ras)), + Expression => + PolyORB_Support.Helpers.Build_From_Any_Call ( + Underlying_RACW_Type (RAS_Type), + New_Occurrence_Of (Any_Parameter, Loc), + No_List)))))); + + Func_Spec := + Make_Function_Specification (Loc, + Defining_Unit_Name => + Fnam, + Parameter_Specifications => New_List ( + Make_Parameter_Specification (Loc, + Defining_Identifier => + Any_Parameter, + Parameter_Type => + New_Occurrence_Of (RTE (RE_Any), Loc))), + Result_Definition => New_Occurrence_Of (RAS_Type, Loc)); + + Discard_Node ( + Make_Subprogram_Body (Loc, + Specification => Func_Spec, + Declarations => No_List, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => Statements))); + Set_TSS (RAS_Type, Fnam); + end Add_RAS_From_Any; + + -------------------- + -- Add_RAS_To_Any -- + -------------------- + + procedure Add_RAS_To_Any (RAS_Type : Entity_Id) is + Loc : constant Source_Ptr := Sloc (RAS_Type); + + Fnam : constant Entity_Id := Make_Defining_Identifier (Loc, + Make_TSS_Name (RAS_Type, TSS_To_Any)); + + Decls : List_Id; + Statements : List_Id; + + Func_Spec : Node_Id; + + Any : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => New_Internal_Name ('A')); + RAS_Parameter : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => New_Internal_Name ('R')); + RACW_Parameter : constant Node_Id := + Make_Selected_Component (Loc, + Prefix => RAS_Parameter, + Selector_Name => Name_Ras); + + begin + -- Object declarations + + Set_Etype (RACW_Parameter, Underlying_RACW_Type (RAS_Type)); + Decls := New_List ( + Make_Object_Declaration (Loc, + Defining_Identifier => + Any, + Object_Definition => + New_Occurrence_Of (RTE (RE_Any), Loc), + Expression => + PolyORB_Support.Helpers.Build_To_Any_Call + (RACW_Parameter, No_List))); + + Statements := New_List ( + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (RTE (RE_Set_TC), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Any, Loc), + PolyORB_Support.Helpers.Build_TypeCode_Call (Loc, + RAS_Type, Decls))), + Make_Return_Statement (Loc, + Expression => + New_Occurrence_Of (Any, Loc))); + + Func_Spec := + Make_Function_Specification (Loc, + Defining_Unit_Name => + Fnam, + Parameter_Specifications => New_List ( + Make_Parameter_Specification (Loc, + Defining_Identifier => + RAS_Parameter, + Parameter_Type => + New_Occurrence_Of (RAS_Type, Loc))), + Result_Definition => New_Occurrence_Of (RTE (RE_Any), Loc)); + + Discard_Node ( + Make_Subprogram_Body (Loc, + Specification => Func_Spec, + Declarations => Decls, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => Statements))); + Set_TSS (RAS_Type, Fnam); + end Add_RAS_To_Any; + + ---------------------- + -- Add_RAS_TypeCode -- + ---------------------- + + procedure Add_RAS_TypeCode (RAS_Type : Entity_Id) is + Loc : constant Source_Ptr := Sloc (RAS_Type); + + Fnam : constant Entity_Id := Make_Defining_Identifier (Loc, + Make_TSS_Name (RAS_Type, TSS_TypeCode)); + + Func_Spec : Node_Id; + + Decls : constant List_Id := New_List; + Name_String, Repo_Id_String : String_Id; + + begin + Func_Spec := + Make_Function_Specification (Loc, + Defining_Unit_Name => + Fnam, + Result_Definition => New_Occurrence_Of (RTE (RE_TypeCode), Loc)); + + PolyORB_Support.Helpers.Build_Name_And_Repository_Id + (RAS_Type, Name_Str => Name_String, Repo_Id_Str => Repo_Id_String); + + Discard_Node ( + Make_Subprogram_Body (Loc, + Specification => Func_Spec, + Declarations => Decls, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => New_List ( + Make_Return_Statement (Loc, + Expression => + Make_Function_Call (Loc, + Name => + New_Occurrence_Of (RTE (RE_TC_Build), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (RTE (RE_TC_Object), Loc), + Make_Aggregate (Loc, + Expressions => + New_List ( + Make_Function_Call (Loc, + Name => New_Occurrence_Of ( + RTE (RE_TA_String), Loc), + Parameter_Associations => New_List ( + Make_String_Literal (Loc, Name_String))), + Make_Function_Call (Loc, + Name => New_Occurrence_Of ( + RTE (RE_TA_String), Loc), + Parameter_Associations => New_List ( + Make_String_Literal (Loc, + Repo_Id_String)))))))))))); + Set_TSS (RAS_Type, Fnam); + end Add_RAS_TypeCode; + + ----------------------------------------- + -- Add_Receiving_Stubs_To_Declarations -- + ----------------------------------------- + + procedure Add_Receiving_Stubs_To_Declarations + (Pkg_Spec : Node_Id; + Decls : List_Id) + is + Loc : constant Source_Ptr := Sloc (Pkg_Spec); + + Pkg_RPC_Receiver : constant Entity_Id := + Make_Defining_Identifier (Loc, + New_Internal_Name ('H')); + Pkg_RPC_Receiver_Object : Node_Id; + + Pkg_RPC_Receiver_Body : Node_Id; + Pkg_RPC_Receiver_Decls : List_Id; + Pkg_RPC_Receiver_Statements : List_Id; + Pkg_RPC_Receiver_Cases : constant List_Id := New_List; + -- A Pkg_RPC_Receiver is built to decode the request + + Request : Node_Id; + -- Request object received from neutral layer + + Subp_Id : Entity_Id; + -- Subprogram identifier as received from the neutral + -- distribution core. + + Subp_Index : Entity_Id; + -- Internal index as determined by matching either the + -- method name from the request structure, or the local + -- subprogram address (in case of a RAS). + + Is_Local : constant Entity_Id := + Make_Defining_Identifier (Loc, New_Internal_Name ('L')); + Local_Address : constant Entity_Id := + Make_Defining_Identifier (Loc, New_Internal_Name ('A')); + -- Address of a local subprogram designated by a + -- reference corresponding to a RAS. + + Dispatch_On_Address : constant List_Id := New_List; + Dispatch_On_Name : constant List_Id := New_List; + + Current_Declaration : Node_Id; + Current_Stubs : Node_Id; + Current_Subprogram_Number : Int := First_RCI_Subprogram_Id; + + Subp_Info_Array : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => New_Internal_Name ('I')); + + Subp_Info_List : constant List_Id := New_List; + + Register_Pkg_Actuals : constant List_Id := New_List; + + All_Calls_Remote_E : Entity_Id; + + procedure Append_Stubs_To + (RPC_Receiver_Cases : List_Id; + Declaration : Node_Id; + Stubs : Node_Id; + Subp_Number : Int; + Subp_Dist_Name : Entity_Id; + Subp_Proxy_Addr : Entity_Id); + -- Add one case to the specified RPC receiver case list associating + -- Subprogram_Number with the subprogram declared by Declaration, for + -- which we have receiving stubs in Stubs. Subp_Number is an internal + -- subprogram index. Subp_Dist_Name is the string used to call the + -- subprogram by name, and Subp_Dist_Addr is the address of the proxy + -- object, used in the context of calls through remote + -- access-to-subprogram types. + + --------------------- + -- Append_Stubs_To -- + --------------------- + + procedure Append_Stubs_To + (RPC_Receiver_Cases : List_Id; + Declaration : Node_Id; + Stubs : Node_Id; + Subp_Number : Int; + Subp_Dist_Name : Entity_Id; + Subp_Proxy_Addr : Entity_Id) + is + Case_Stmts : List_Id; + begin + Case_Stmts := New_List ( + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of ( + Defining_Entity (Stubs), Loc), + Parameter_Associations => + New_List (New_Occurrence_Of (Request, Loc)))); + if Nkind (Specification (Declaration)) + = N_Function_Specification + or else not + Is_Asynchronous (Defining_Entity (Specification (Declaration))) + then + Append_To (Case_Stmts, Make_Return_Statement (Loc)); + end if; + + Append_To (RPC_Receiver_Cases, + Make_Case_Statement_Alternative (Loc, + Discrete_Choices => + New_List (Make_Integer_Literal (Loc, Subp_Number)), + Statements => + Case_Stmts)); + + Append_To (Dispatch_On_Name, + Make_Elsif_Part (Loc, + Condition => + Make_Function_Call (Loc, + Name => + New_Occurrence_Of (RTE (RE_Caseless_String_Eq), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Subp_Id, Loc), + New_Occurrence_Of (Subp_Dist_Name, Loc))), + Then_Statements => New_List ( + Make_Assignment_Statement (Loc, + New_Occurrence_Of (Subp_Index, Loc), + Make_Integer_Literal (Loc, + Subp_Number))))); + + Append_To (Dispatch_On_Address, + Make_Elsif_Part (Loc, + Condition => + Make_Op_Eq (Loc, + Left_Opnd => + New_Occurrence_Of (Local_Address, Loc), + Right_Opnd => + New_Occurrence_Of (Subp_Proxy_Addr, Loc)), + Then_Statements => New_List ( + Make_Assignment_Statement (Loc, + New_Occurrence_Of (Subp_Index, Loc), + Make_Integer_Literal (Loc, + Subp_Number))))); + end Append_Stubs_To; + + -- Start of processing for Add_Receiving_Stubs_To_Declarations + + begin + -- Building receiving stubs consist in several operations: + + -- - a package RPC receiver must be built. This subprogram + -- will get a Subprogram_Id from the incoming stream + -- and will dispatch the call to the right subprogram + + -- - a receiving stub for any subprogram visible in the package + -- spec. This stub will read all the parameters from the stream, + -- and put the result as well as the exception occurrence in the + -- output stream + + -- - a dummy package with an empty spec and a body made of an + -- elaboration part, whose job is to register the receiving + -- part of this RCI package on the name server. This is done + -- by calling System.Partition_Interface.Register_Receiving_Stub + + Build_RPC_Receiver_Body ( + RPC_Receiver => Pkg_RPC_Receiver, + Request => Request, + Subp_Id => Subp_Id, + Subp_Index => Subp_Index, + Stmts => Pkg_RPC_Receiver_Statements, + Decl => Pkg_RPC_Receiver_Body); + Pkg_RPC_Receiver_Decls := Declarations (Pkg_RPC_Receiver_Body); + + -- Extract local address information from the target reference: + -- if non-null, that means that this is a reference that denotes + -- one particular operation, and hence that the operation name + -- must not be taken into account for dispatching. + + Append_To (Pkg_RPC_Receiver_Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => + Is_Local, + Object_Definition => + New_Occurrence_Of (Standard_Boolean, Loc))); + Append_To (Pkg_RPC_Receiver_Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => + Local_Address, + Object_Definition => + New_Occurrence_Of (RTE (RE_Address), Loc))); + Append_To (Pkg_RPC_Receiver_Statements, + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (RTE (RE_Get_Local_Address), Loc), + Parameter_Associations => New_List ( + Make_Selected_Component (Loc, + Prefix => Request, + Selector_Name => Name_Target), + New_Occurrence_Of (Is_Local, Loc), + New_Occurrence_Of (Local_Address, Loc)))); + + -- Determine whether the reference that was used to make + -- the call was the base RCI reference (in which case + -- Local_Address is 0, and the method identifier from the + -- request must be used to determine which subprogram is + -- called) or a reference identifying one particular subprogram + -- (in which case Local_Address is the address of that + -- subprogram, and the method name from the request is + -- ignored). + -- In each case, cascaded elsifs are used to determine the + -- proper subprogram index. Using hash tables might be + -- more efficient. + + Append_To (Pkg_RPC_Receiver_Statements, + Make_Implicit_If_Statement (Pkg_Spec, + Condition => + Make_Op_Ne (Loc, + Left_Opnd => New_Occurrence_Of (Local_Address, Loc), + Right_Opnd => New_Occurrence_Of (RTE (RE_Null_Address), Loc)), + Then_Statements => New_List ( + Make_Implicit_If_Statement (Pkg_Spec, + Condition => + New_Occurrence_Of (Standard_False, Loc), + Then_Statements => New_List ( + Make_Null_Statement (Loc)), + Elsif_Parts => + Dispatch_On_Address)), + Else_Statements => New_List ( + Make_Implicit_If_Statement (Pkg_Spec, + Condition => + New_Occurrence_Of (Standard_False, Loc), + Then_Statements => New_List ( + Make_Null_Statement (Loc)), + Elsif_Parts => + Dispatch_On_Name)))); + + -- For each subprogram, the receiving stub will be built and a + -- case statement will be made on the Subprogram_Id to dispatch + -- to the right subprogram. + + All_Calls_Remote_E := Boolean_Literals ( + Has_All_Calls_Remote (Defining_Entity (Pkg_Spec))); + + Overload_Counter_Table.Reset; + Reserve_NamingContext_Methods; + + Current_Declaration := First (Visible_Declarations (Pkg_Spec)); + while Present (Current_Declaration) loop + if Nkind (Current_Declaration) = N_Subprogram_Declaration + and then Comes_From_Source (Current_Declaration) + then + declare + Loc : constant Source_Ptr := + Sloc (Current_Declaration); + -- While specifically processing Current_Declaration, use + -- its Sloc as the location of all generated nodes. + + Subp_Def : constant Entity_Id := + Defining_Unit_Name + (Specification (Current_Declaration)); + + Subp_Val : String_Id; + + Subp_Dist_Name : constant Entity_Id := + Make_Defining_Identifier (Loc, + New_External_Name ( + Related_Id => Chars (Subp_Def), + Suffix => 'D', + Suffix_Index => -1)); + + Proxy_Object_Addr : Entity_Id; + + begin + pragma Assert (Current_Subprogram_Number = + Get_Subprogram_Id (Subp_Def)); + + -- Build receiving stub + + Current_Stubs := + Build_Subprogram_Receiving_Stubs + (Vis_Decl => Current_Declaration, + Asynchronous => + Nkind (Specification (Current_Declaration)) = + N_Procedure_Specification + and then Is_Asynchronous (Subp_Def)); + + Append_To (Decls, Current_Stubs); + Analyze (Current_Stubs); + + -- Build RAS proxy + + Add_RAS_Proxy_And_Analyze (Decls, + Vis_Decl => + Current_Declaration, + All_Calls_Remote_E => + All_Calls_Remote_E, + Proxy_Object_Addr => + Proxy_Object_Addr); + + -- Compute distribution identifier + + Assign_Subprogram_Identifier ( + Subp_Def, + Current_Subprogram_Number, + Subp_Val); + + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Subp_Dist_Name, + Constant_Present => True, + Object_Definition => New_Occurrence_Of ( + Standard_String, Loc), + Expression => + Make_String_Literal (Loc, Subp_Val))); + Analyze (Last (Decls)); + + -- Add subprogram descriptor (RCI_Subp_Info) to the + -- subprograms table for this receiver. The aggregate + -- below must be kept consistent with the declaration + -- of type RCI_Subp_Info in System.Partition_Interface. + + Append_To (Subp_Info_List, + Make_Component_Association (Loc, + Choices => New_List ( + Make_Integer_Literal (Loc, + Current_Subprogram_Number)), + Expression => + Make_Aggregate (Loc, + Expressions => New_List ( + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of ( + Subp_Dist_Name, Loc), + Attribute_Name => Name_Address), + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of ( + Subp_Dist_Name, Loc), + Attribute_Name => Name_Length), + New_Occurrence_Of (Proxy_Object_Addr, Loc))))); + + Append_Stubs_To (Pkg_RPC_Receiver_Cases, + Declaration => Current_Declaration, + Stubs => Current_Stubs, + Subp_Number => Current_Subprogram_Number, + Subp_Dist_Name => Subp_Dist_Name, + Subp_Proxy_Addr => Proxy_Object_Addr); + end; + + Current_Subprogram_Number := Current_Subprogram_Number + 1; + end if; + + Next (Current_Declaration); + end loop; + + -- If we receive an invalid Subprogram_Id, it is best to do nothing + -- rather than raising an exception since we do not want someone + -- to crash a remote partition by sending invalid subprogram ids. + -- This is consistent with the other parts of the case statement + -- since even in presence of incorrect parameters in the stream, + -- every exception will be caught and (if the subprogram is not an + -- APC) put into the result stream and sent away. + + Append_To (Pkg_RPC_Receiver_Cases, + Make_Case_Statement_Alternative (Loc, + Discrete_Choices => + New_List (Make_Others_Choice (Loc)), + Statements => + New_List (Make_Null_Statement (Loc)))); + + Append_To (Pkg_RPC_Receiver_Statements, + Make_Case_Statement (Loc, + Expression => + New_Occurrence_Of (Subp_Index, Loc), + Alternatives => Pkg_RPC_Receiver_Cases)); + + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Subp_Info_Array, + Constant_Present => True, + Aliased_Present => True, + Object_Definition => + Make_Subtype_Indication (Loc, + Subtype_Mark => + New_Occurrence_Of (RTE (RE_RCI_Subp_Info_Array), Loc), + Constraint => + Make_Index_Or_Discriminant_Constraint (Loc, + New_List ( + Make_Range (Loc, + Low_Bound => Make_Integer_Literal (Loc, + First_RCI_Subprogram_Id), + High_Bound => + Make_Integer_Literal (Loc, + First_RCI_Subprogram_Id + + List_Length (Subp_Info_List) - 1))))), + Expression => + Make_Aggregate (Loc, + Component_Associations => Subp_Info_List))); + Analyze (Last (Decls)); + + Append_To (Decls, Pkg_RPC_Receiver_Body); + Analyze (Last (Decls)); + + Pkg_RPC_Receiver_Object := + Make_Object_Declaration (Loc, + Defining_Identifier => + Make_Defining_Identifier (Loc, New_Internal_Name ('R')), + Aliased_Present => True, + Object_Definition => + New_Occurrence_Of (RTE (RE_Servant), Loc)); + Append_To (Decls, Pkg_RPC_Receiver_Object); + Analyze (Last (Decls)); + + Get_Library_Unit_Name_String (Pkg_Spec); + Append_To (Register_Pkg_Actuals, + -- Name + Make_String_Literal (Loc, + Strval => String_From_Name_Buffer)); + + Append_To (Register_Pkg_Actuals, + -- Version + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of + (Defining_Entity (Pkg_Spec), Loc), + Attribute_Name => + Name_Version)); + + Append_To (Register_Pkg_Actuals, + -- Handler + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Pkg_RPC_Receiver, Loc), + Attribute_Name => Name_Access)); + + Append_To (Register_Pkg_Actuals, + -- Receiver + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of ( + Defining_Identifier ( + Pkg_RPC_Receiver_Object), Loc), + Attribute_Name => + Name_Access)); + + Append_To (Register_Pkg_Actuals, + -- Subp_Info + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Subp_Info_Array, Loc), + Attribute_Name => + Name_Address)); + + Append_To (Register_Pkg_Actuals, + -- Subp_Info_Len + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Subp_Info_Array, Loc), + Attribute_Name => + Name_Length)); + + Append_To (Register_Pkg_Actuals, + -- Is_All_Calls_Remote + New_Occurrence_Of (All_Calls_Remote_E, Loc)); + + Append_To (Decls, + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (RTE (RE_Register_Pkg_Receiving_Stub), Loc), + Parameter_Associations => Register_Pkg_Actuals)); + Analyze (Last (Decls)); + + end Add_Receiving_Stubs_To_Declarations; + + --------------------------------- + -- Build_General_Calling_Stubs -- + --------------------------------- + + procedure Build_General_Calling_Stubs + (Decls : List_Id; + Statements : List_Id; + Target_Object : Node_Id; + Subprogram_Id : Node_Id; + Asynchronous : Node_Id := Empty; + Is_Known_Asynchronous : Boolean := False; + Is_Known_Non_Asynchronous : Boolean := False; + Is_Function : Boolean; + Spec : Node_Id; + Stub_Type : Entity_Id := Empty; + RACW_Type : Entity_Id := Empty; + Nod : Node_Id) + is + Loc : constant Source_Ptr := Sloc (Nod); + + Arguments : Node_Id; + -- Name of the named values list used to transmit parameters + -- to the remote package + + Request : Node_Id; + -- The request object constructed by these stubs + + Result : Node_Id; + -- Name of the result named value (in non-APC cases) which get the + -- result of the remote subprogram. + + Result_TC : Node_Id; + -- Typecode expression for the result of the request (void + -- typecode for procedures). + + Exception_Return_Parameter : Node_Id; + -- Name of the parameter which will hold the exception sent by the + -- remote subprogram. + + Current_Parameter : Node_Id; + -- Current parameter being handled + + Ordered_Parameters_List : constant List_Id := + Build_Ordered_Parameters_List (Spec); + + Asynchronous_P : Node_Id; + -- A Boolean expression indicating whether this call is asynchronous + + Asynchronous_Statements : List_Id := No_List; + Non_Asynchronous_Statements : List_Id := No_List; + -- Statements specifics to the Asynchronous/Non-Asynchronous cases + + Extra_Formal_Statements : constant List_Id := New_List; + -- List of statements for extra formal parameters. It will appear + -- after the regular statements for writing out parameters. + + After_Statements : constant List_Id := New_List; + -- Statements to be executed after call returns (to assign + -- in out or out parameter values). + + Etyp : Entity_Id; + -- The type of the formal parameter being processed + + Is_Controlling_Formal : Boolean; + Is_First_Controlling_Formal : Boolean; + First_Controlling_Formal_Seen : Boolean := False; + -- Controlling formal parameters of distributed object + -- primitives require special handling, and the first + -- such parameter needs even more. + + begin + -- ??? document general form of stub subprograms for the PolyORB case + Request := + Make_Defining_Identifier (Loc, New_Internal_Name ('R')); + + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Request, + Aliased_Present => False, + Object_Definition => + New_Occurrence_Of (RTE (RE_Request_Access), Loc))); + + Result := + Make_Defining_Identifier (Loc, New_Internal_Name ('R')); + + if Is_Function then + Result_TC := PolyORB_Support.Helpers.Build_TypeCode_Call (Loc, + Etype (Result_Definition (Spec)), Decls); + else + Result_TC := New_Occurrence_Of (RTE (RE_TC_Void), Loc); + end if; + + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Result, + Aliased_Present => False, + Object_Definition => + New_Occurrence_Of (RTE (RE_NamedValue), Loc), + Expression => + Make_Aggregate (Loc, + Component_Associations => New_List ( + Make_Component_Association (Loc, + Choices => New_List ( + Make_Identifier (Loc, Name_Name)), + Expression => + New_Occurrence_Of (RTE (RE_Result_Name), Loc)), + Make_Component_Association (Loc, + Choices => New_List ( + Make_Identifier (Loc, Name_Argument)), + Expression => + Make_Function_Call (Loc, + Name => + New_Occurrence_Of (RTE (RE_Create_Any), Loc), + Parameter_Associations => New_List ( + Result_TC))), + Make_Component_Association (Loc, + Choices => New_List ( + Make_Identifier (Loc, Name_Arg_Modes)), + Expression => + Make_Integer_Literal (Loc, 0)))))); + + if not Is_Known_Asynchronous then + Exception_Return_Parameter := + Make_Defining_Identifier (Loc, New_Internal_Name ('E')); + + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Exception_Return_Parameter, + Object_Definition => + New_Occurrence_Of (RTE (RE_Exception_Occurrence), Loc))); + + else + Exception_Return_Parameter := Empty; + end if; + + -- Initialize and fill in arguments list + + Arguments := + Make_Defining_Identifier (Loc, New_Internal_Name ('A')); + Declare_Create_NVList (Loc, Arguments, Decls, Statements); + + Current_Parameter := First (Ordered_Parameters_List); + while Present (Current_Parameter) loop + + if Is_RACW_Controlling_Formal (Current_Parameter, Stub_Type) then + Is_Controlling_Formal := True; + Is_First_Controlling_Formal := + not First_Controlling_Formal_Seen; + First_Controlling_Formal_Seen := True; + else + Is_Controlling_Formal := False; + Is_First_Controlling_Formal := False; + end if; + + if Is_Controlling_Formal then + + -- In the case of a controlling formal argument, we send + -- its reference. + + Etyp := RACW_Type; + + else + Etyp := Etype (Parameter_Type (Current_Parameter)); + end if; + + -- The first controlling formal parameter is treated + -- specially: it is used to set the target object of + -- the call. + + if not Is_First_Controlling_Formal then + + declare + Constrained : constant Boolean := + Is_Constrained (Etyp) + or else Is_Elementary_Type (Etyp); + + Any : constant Entity_Id := + Make_Defining_Identifier (Loc, + New_Internal_Name ('A')); + + Actual_Parameter : Node_Id := + New_Occurrence_Of ( + Defining_Identifier ( + Current_Parameter), Loc); + + Expr : Node_Id; + + begin + if Is_Controlling_Formal then + + -- For a controlling formal parameter (other + -- than the first one), use the corresponding + -- RACW. If the parameter is not an anonymous + -- access parameter, that involves taking + -- its 'Unrestricted_Access. + + if Nkind (Parameter_Type (Current_Parameter)) + = N_Access_Definition + then + Actual_Parameter := OK_Convert_To + (Etyp, Actual_Parameter); + else + Actual_Parameter := OK_Convert_To (Etyp, + Make_Attribute_Reference (Loc, + Prefix => + Actual_Parameter, + Attribute_Name => + Name_Unrestricted_Access)); + end if; + + end if; + + if In_Present (Current_Parameter) + or else not Out_Present (Current_Parameter) + or else not Constrained + or else Is_Controlling_Formal + then + -- The parameter has an input value, is constrained + -- at runtime by an input value, or is a controlling + -- formal parameter (always passed as a reference) + -- other than the first one. + + Expr := PolyORB_Support.Helpers.Build_To_Any_Call ( + Actual_Parameter, Decls); + else + Expr := Make_Function_Call (Loc, + Name => + New_Occurrence_Of (RTE (RE_Create_Any), Loc), + Parameter_Associations => New_List ( + PolyORB_Support.Helpers.Build_TypeCode_Call (Loc, + Etyp, Decls))); + end if; + + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => + Any, + Aliased_Present => False, + Object_Definition => + New_Occurrence_Of (RTE (RE_Any), Loc), + Expression => + Expr)); + + Append_To (Statements, + Add_Parameter_To_NVList (Loc, + Parameter => Current_Parameter, + NVList => Arguments, + Constrained => Constrained, + Any => Any)); + + if Out_Present (Current_Parameter) + and then not Is_Controlling_Formal + then + Append_To (After_Statements, + Make_Assignment_Statement (Loc, + Name => + New_Occurrence_Of ( + Defining_Identifier (Current_Parameter), Loc), + Expression => + PolyORB_Support.Helpers.Build_From_Any_Call ( + Etype (Parameter_Type (Current_Parameter)), + New_Occurrence_Of (Any, Loc), + Decls))); + + end if; + end; + end if; + + -- If the current parameter has a dynamic constrained status, + -- then this status is transmitted as well. + -- This should be done for accessibility as well ??? + + if Nkind (Parameter_Type (Current_Parameter)) + /= N_Access_Definition + and then Need_Extra_Constrained (Current_Parameter) + then + -- In this block, we do not use the extra formal that has been + -- created because it does not exist at the time of expansion + -- when building calling stubs for remote access to subprogram + -- types. We create an extra variable of this type and push it + -- in the stream after the regular parameters. + + declare + Extra_Any_Parameter : constant Entity_Id := + Make_Defining_Identifier + (Loc, New_Internal_Name ('P')); + + begin + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => + Extra_Any_Parameter, + Aliased_Present => False, + Object_Definition => + New_Occurrence_Of (RTE (RE_Any), Loc), + Expression => + PolyORB_Support.Helpers.Build_To_Any_Call ( + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of ( + Defining_Identifier (Current_Parameter), Loc), + Attribute_Name => Name_Constrained), + Decls))); + Append_To (Extra_Formal_Statements, + Add_Parameter_To_NVList (Loc, + Parameter => Extra_Any_Parameter, + NVList => Arguments, + Constrained => True, + Any => Extra_Any_Parameter)); + end; + end if; + + Next (Current_Parameter); + end loop; + + -- Append the formal statements list to the statements + + Append_List_To (Statements, Extra_Formal_Statements); + + Append_To (Statements, + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (RTE (RE_Request_Create), Loc), + Parameter_Associations => New_List ( + Target_Object, + Subprogram_Id, + New_Occurrence_Of (Arguments, Loc), + New_Occurrence_Of (Result, Loc), + New_Occurrence_Of (RTE (RE_Nil_Exc_List), Loc)))); + + Append_To (Parameter_Associations (Last (Statements)), + New_Occurrence_Of (Request, Loc)); + + pragma Assert ( + not (Is_Known_Non_Asynchronous and Is_Known_Asynchronous)); + if Is_Known_Non_Asynchronous or Is_Known_Asynchronous then + Asynchronous_P := New_Occurrence_Of ( + Boolean_Literals (Is_Known_Asynchronous), Loc); + else + pragma Assert (Present (Asynchronous)); + Asynchronous_P := New_Copy_Tree (Asynchronous); + -- The expression node Asynchronous will be used to build + -- an 'if' statement at the end of Build_General_Calling_Stubs: + -- we need to make a copy here. + end if; + + Append_To (Parameter_Associations (Last (Statements)), + Make_Indexed_Component (Loc, + Prefix => + New_Occurrence_Of ( + RTE (RE_Asynchronous_P_To_Sync_Scope), Loc), + Expressions => New_List (Asynchronous_P))); + + Append_To (Statements, + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (RTE (RE_Request_Invoke), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Request, Loc)))); + + Non_Asynchronous_Statements := New_List (Make_Null_Statement (Loc)); + Asynchronous_Statements := New_List (Make_Null_Statement (Loc)); + + if not Is_Known_Asynchronous then + + -- Reraise an exception occurrence from the completed request. + -- If the exception occurrence is empty, this is a no-op. + + Append_To (Non_Asynchronous_Statements, + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (RTE (RE_Request_Raise_Occurrence), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Request, Loc)))); + + if Is_Function then + + -- If this is a function call, then read the value and + -- return it. + + Append_To (Non_Asynchronous_Statements, + Make_Tag_Check (Loc, + Make_Return_Statement (Loc, + PolyORB_Support.Helpers.Build_From_Any_Call ( + Etype (Result_Definition (Spec)), + Make_Selected_Component (Loc, + Prefix => Result, + Selector_Name => Name_Argument), + Decls)))); + end if; + end if; + + Append_List_To (Non_Asynchronous_Statements, + After_Statements); + + if Is_Known_Asynchronous then + Append_List_To (Statements, Asynchronous_Statements); + + elsif Is_Known_Non_Asynchronous then + Append_List_To (Statements, Non_Asynchronous_Statements); + + else + pragma Assert (Present (Asynchronous)); + Append_To (Statements, + Make_Implicit_If_Statement (Nod, + Condition => Asynchronous, + Then_Statements => Asynchronous_Statements, + Else_Statements => Non_Asynchronous_Statements)); + end if; + end Build_General_Calling_Stubs; + + ----------------------- + -- Build_Stub_Target -- + ----------------------- + + function Build_Stub_Target + (Loc : Source_Ptr; + Decls : List_Id; + RCI_Locator : Entity_Id; + Controlling_Parameter : Entity_Id) return RPC_Target + is + Target_Info : RPC_Target (PCS_Kind => Name_PolyORB_DSA); + Target_Reference : constant Entity_Id := + Make_Defining_Identifier (Loc, + New_Internal_Name ('T')); + begin + if Present (Controlling_Parameter) then + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Target_Reference, + Object_Definition => + New_Occurrence_Of (RTE (RE_Object_Ref), Loc), + Expression => + Make_Function_Call (Loc, + Name => + New_Occurrence_Of (RTE (RE_Make_Ref), Loc), + Parameter_Associations => New_List ( + Make_Selected_Component (Loc, + Prefix => Controlling_Parameter, + Selector_Name => Name_Target))))); + -- Controlling_Parameter has the same components + -- as System.Partition_Interface.RACW_Stub_Type. + + Target_Info.Object := New_Occurrence_Of (Target_Reference, Loc); + + else + Target_Info.Object := + Make_Selected_Component (Loc, + Prefix => + Make_Identifier (Loc, Chars (RCI_Locator)), + Selector_Name => + Make_Identifier (Loc, Name_Get_RCI_Package_Ref)); + end if; + return Target_Info; + end Build_Stub_Target; + + --------------------- + -- Build_Stub_Type -- + --------------------- + + procedure Build_Stub_Type + (RACW_Type : Entity_Id; + Stub_Type : Entity_Id; + Stub_Type_Decl : out Node_Id; + RPC_Receiver_Decl : out Node_Id) + is + Loc : constant Source_Ptr := Sloc (Stub_Type); + pragma Warnings (Off); + pragma Unreferenced (RACW_Type); + pragma Warnings (On); + + begin + Stub_Type_Decl := + Make_Full_Type_Declaration (Loc, + Defining_Identifier => Stub_Type, + Type_Definition => + Make_Record_Definition (Loc, + Tagged_Present => True, + Limited_Present => True, + Component_List => + Make_Component_List (Loc, + Component_Items => New_List ( + + Make_Component_Declaration (Loc, + Defining_Identifier => + Make_Defining_Identifier (Loc, Name_Target), + Component_Definition => + Make_Component_Definition (Loc, + Aliased_Present => + False, + Subtype_Indication => + New_Occurrence_Of (RTE (RE_Entity_Ptr), Loc))), + + Make_Component_Declaration (Loc, + Defining_Identifier => + Make_Defining_Identifier (Loc, Name_Asynchronous), + Component_Definition => + Make_Component_Definition (Loc, + Aliased_Present => False, + Subtype_Indication => + New_Occurrence_Of ( + Standard_Boolean, Loc))))))); + + RPC_Receiver_Decl := + Make_Object_Declaration (Loc, + Defining_Identifier => Make_Defining_Identifier (Loc, + New_Internal_Name ('R')), + Aliased_Present => True, + Object_Definition => + New_Occurrence_Of (RTE (RE_Servant), Loc)); + end Build_Stub_Type; + + ----------------------------- + -- Build_RPC_Receiver_Body -- + ----------------------------- + + procedure Build_RPC_Receiver_Body + (RPC_Receiver : Entity_Id; + Request : out Entity_Id; + Subp_Id : out Entity_Id; + Subp_Index : out Entity_Id; + Stmts : out List_Id; + Decl : out Node_Id) + is + Loc : constant Source_Ptr := Sloc (RPC_Receiver); + + RPC_Receiver_Spec : Node_Id; + RPC_Receiver_Decls : List_Id; + + begin + Request := Make_Defining_Identifier (Loc, Name_R); + + RPC_Receiver_Spec := + Build_RPC_Receiver_Specification ( + RPC_Receiver => RPC_Receiver, + Request_Parameter => Request); + + Subp_Id := Make_Defining_Identifier (Loc, Name_P); + Subp_Index := Make_Defining_Identifier (Loc, Name_I); + + RPC_Receiver_Decls := New_List ( + Make_Object_Renaming_Declaration (Loc, + Defining_Identifier => Subp_Id, + Subtype_Mark => New_Occurrence_Of (Standard_String, Loc), + Name => + Make_Explicit_Dereference (Loc, + Prefix => + Make_Selected_Component (Loc, + Prefix => Request, + Selector_Name => Name_Operation))), + + Make_Object_Declaration (Loc, + Defining_Identifier => Subp_Index, + Object_Definition => + New_Occurrence_Of (RTE (RE_Subprogram_Id), Loc), + Expression => + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (RTE (RE_Subprogram_Id), Loc), + Attribute_Name => Name_Last))); + + Stmts := New_List; + + Decl := + Make_Subprogram_Body (Loc, + Specification => RPC_Receiver_Spec, + Declarations => RPC_Receiver_Decls, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => Stmts)); + end Build_RPC_Receiver_Body; + + -------------------------------------- + -- Build_Subprogram_Receiving_Stubs -- + -------------------------------------- + + function Build_Subprogram_Receiving_Stubs + (Vis_Decl : Node_Id; + Asynchronous : Boolean; + Dynamically_Asynchronous : Boolean := False; + Stub_Type : Entity_Id := Empty; + RACW_Type : Entity_Id := Empty; + Parent_Primitive : Entity_Id := Empty) return Node_Id + is + Loc : constant Source_Ptr := Sloc (Vis_Decl); + + Request_Parameter : Node_Id; + -- ??? + + Outer_Decls : constant List_Id := New_List; + -- At the outermost level, an NVList and Any's are + -- declared for all parameters. The Dynamic_Async + -- flag also needs to be declared there to be visible + -- from the exception handling code. + + Outer_Statements : constant List_Id := New_List; + -- Statements that occur prior to the declaration of the actual + -- parameter variables. + + Decls : constant List_Id := New_List; + -- All the parameters will get declared before calling the real + -- subprograms. Also the out parameters will be declared. + -- At this level, parameters may be unconstrained. + + Statements : constant List_Id := New_List; + + Extra_Formal_Statements : constant List_Id := New_List; + -- Statements concerning extra formal parameters + + After_Statements : constant List_Id := New_List; + -- Statements to be executed after the subprogram call + + Inner_Decls : List_Id := No_List; + -- In case of a function, the inner declarations are needed since + -- the result may be unconstrained. + + Excep_Handlers : List_Id := No_List; + + Parameter_List : constant List_Id := New_List; + -- List of parameters to be passed to the subprogram + + First_Controlling_Formal_Seen : Boolean := False; + + Current_Parameter : Node_Id; + + Ordered_Parameters_List : constant List_Id := + Build_Ordered_Parameters_List + (Specification (Vis_Decl)); + + Arguments : Node_Id; + -- Name of the named values list used to retrieve parameters + + Subp_Spec : Node_Id; + -- Subprogram specification + + Called_Subprogram : Node_Id; + -- The subprogram to call + + begin + if Present (RACW_Type) then + Called_Subprogram := + New_Occurrence_Of (Parent_Primitive, Loc); + else + Called_Subprogram := + New_Occurrence_Of ( + Defining_Unit_Name (Specification (Vis_Decl)), Loc); + end if; + + Request_Parameter := + Make_Defining_Identifier (Loc, New_Internal_Name ('R')); + + Arguments := + Make_Defining_Identifier (Loc, New_Internal_Name ('A')); + Declare_Create_NVList (Loc, Arguments, Outer_Decls, Outer_Statements); + + -- Loop through every parameter and get its value from the stream. If + -- the parameter is unconstrained, then the parameter is read using + -- 'Input at the point of declaration. + + Current_Parameter := First (Ordered_Parameters_List); + while Present (Current_Parameter) loop + declare + Etyp : Entity_Id; + Constrained : Boolean; + Any : Entity_Id := Empty; + Object : constant Entity_Id := + Make_Defining_Identifier (Loc, + New_Internal_Name ('P')); + Expr : Node_Id := Empty; + + Is_Controlling_Formal : constant Boolean + := Is_RACW_Controlling_Formal (Current_Parameter, Stub_Type); + + Is_First_Controlling_Formal : Boolean := False; + begin + Set_Ekind (Object, E_Variable); + + if Is_Controlling_Formal then + + -- Controlling formals in distributed object primitive + -- operations are handled specially: + -- - the first controlling formal is used as the + -- target of the call; + -- - the remaining controlling formals are transmitted + -- as RACWs. + + Etyp := RACW_Type; + Is_First_Controlling_Formal := + not First_Controlling_Formal_Seen; + First_Controlling_Formal_Seen := True; + else + Etyp := Etype (Parameter_Type (Current_Parameter)); + end if; + + Constrained := + Is_Constrained (Etyp) + or else Is_Elementary_Type (Etyp); + + if not Is_First_Controlling_Formal then + Any := Make_Defining_Identifier (Loc, + New_Internal_Name ('A')); + Append_To (Outer_Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => + Any, + Object_Definition => + New_Occurrence_Of (RTE (RE_Any), Loc), + Expression => + Make_Function_Call (Loc, + Name => + New_Occurrence_Of (RTE (RE_Create_Any), Loc), + Parameter_Associations => New_List ( + PolyORB_Support.Helpers.Build_TypeCode_Call (Loc, + Etyp, Outer_Decls))))); + + Append_To (Outer_Statements, + Add_Parameter_To_NVList (Loc, + Parameter => Current_Parameter, + NVList => Arguments, + Constrained => Constrained, + Any => Any)); + end if; + + if Is_First_Controlling_Formal then + declare + Addr : constant Entity_Id := + Make_Defining_Identifier (Loc, + New_Internal_Name ('A')); + Is_Local : constant Entity_Id := + Make_Defining_Identifier (Loc, + New_Internal_Name ('L')); + begin + + -- Special case: obtain the first controlling + -- formal from the target of the remote call, + -- instead of the argument list. + + Append_To (Outer_Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => + Addr, + Object_Definition => + New_Occurrence_Of (RTE (RE_Address), Loc))); + Append_To (Outer_Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => + Is_Local, + Object_Definition => + New_Occurrence_Of (Standard_Boolean, Loc))); + Append_To (Outer_Statements, + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of ( + RTE (RE_Get_Local_Address), Loc), + Parameter_Associations => New_List ( + Make_Selected_Component (Loc, + Prefix => + New_Occurrence_Of ( + Request_Parameter, Loc), + Selector_Name => + Make_Identifier (Loc, Name_Target)), + New_Occurrence_Of (Is_Local, Loc), + New_Occurrence_Of (Addr, Loc)))); + + Expr := Unchecked_Convert_To (RACW_Type, + New_Occurrence_Of (Addr, Loc)); + end; + + elsif In_Present (Current_Parameter) + or else not Out_Present (Current_Parameter) + or else not Constrained + then + -- If an input parameter is contrained, then its reading is + -- deferred until the beginning of the subprogram body. If + -- it is unconstrained, then an expression is built for + -- the object declaration and the variable is set using + -- 'Input instead of 'Read. + + Expr := PolyORB_Support.Helpers.Build_From_Any_Call ( + Etyp, New_Occurrence_Of (Any, Loc), Decls); + + if Constrained then + + Append_To (Statements, + Make_Assignment_Statement (Loc, + Name => + New_Occurrence_Of (Object, Loc), + Expression => + Expr)); + Expr := Empty; + else + null; + -- Expr will be used to initialize (and constrain) + -- the parameter when it is declared. + end if; + + end if; + + -- If we do not have to output the current parameter, then + -- it can well be flagged as constant. This may allow further + -- optimizations done by the back end. + + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Object, + Constant_Present => not Constrained + and then not Out_Present (Current_Parameter), + Object_Definition => + New_Occurrence_Of (Etyp, Loc), + Expression => Expr)); + Set_Etype (Object, Etyp); + + -- An out parameter may be written back using a 'Write + -- attribute instead of a 'Output because it has been + -- constrained by the parameter given to the caller. Note that + -- out controlling arguments in the case of a RACW are not put + -- back in the stream because the pointer on them has not + -- changed. + + if Out_Present (Current_Parameter) + and then not Is_Controlling_Formal + then + Append_To (After_Statements, + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (RTE (RE_Copy_Any_Value), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Any, Loc), + PolyORB_Support.Helpers.Build_To_Any_Call ( + New_Occurrence_Of (Object, Loc), + Decls)))); + end if; + + -- For RACW controlling formals, the Etyp of Object is always + -- an RACW, even if the parameter is not of an anonymous access + -- type. In such case, we need to dereference it at call time. + + if Is_Controlling_Formal then + if Nkind (Parameter_Type (Current_Parameter)) /= + N_Access_Definition + then + Append_To (Parameter_List, + Make_Parameter_Association (Loc, + Selector_Name => + New_Occurrence_Of ( + Defining_Identifier (Current_Parameter), Loc), + Explicit_Actual_Parameter => + Make_Explicit_Dereference (Loc, + Unchecked_Convert_To (RACW_Type, + OK_Convert_To (RTE (RE_Address), + New_Occurrence_Of (Object, Loc)))))); + + else + Append_To (Parameter_List, + Make_Parameter_Association (Loc, + Selector_Name => + New_Occurrence_Of ( + Defining_Identifier (Current_Parameter), Loc), + Explicit_Actual_Parameter => + Unchecked_Convert_To (RACW_Type, + OK_Convert_To (RTE (RE_Address), + New_Occurrence_Of (Object, Loc))))); + end if; + + else + Append_To (Parameter_List, + Make_Parameter_Association (Loc, + Selector_Name => + New_Occurrence_Of ( + Defining_Identifier (Current_Parameter), Loc), + Explicit_Actual_Parameter => + New_Occurrence_Of (Object, Loc))); + end if; + + -- If the current parameter needs an extra formal, then read it + -- from the stream and set the corresponding semantic field in + -- the variable. If the kind of the parameter identifier is + -- E_Void, then this is a compiler generated parameter that + -- doesn't need an extra constrained status. + + -- The case of Extra_Accessibility should also be handled ??? + + if Nkind (Parameter_Type (Current_Parameter)) /= + N_Access_Definition + and then + Ekind (Defining_Identifier (Current_Parameter)) /= E_Void + and then + Present (Extra_Constrained + (Defining_Identifier (Current_Parameter))) + then + declare + Extra_Parameter : constant Entity_Id := + Extra_Constrained + (Defining_Identifier + (Current_Parameter)); + Extra_Any : constant Entity_Id := + Make_Defining_Identifier + (Loc, New_Internal_Name ('A')); + Formal_Entity : constant Entity_Id := + Make_Defining_Identifier + (Loc, Chars (Extra_Parameter)); + + Formal_Type : constant Entity_Id := + Etype (Extra_Parameter); + begin + Append_To (Outer_Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => + Extra_Any, + Object_Definition => + New_Occurrence_Of (RTE (RE_Any), Loc))); + + Append_To (Outer_Statements, + Add_Parameter_To_NVList (Loc, + Parameter => Extra_Parameter, + NVList => Arguments, + Constrained => True, + Any => Extra_Any)); + + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Formal_Entity, + Object_Definition => + New_Occurrence_Of (Formal_Type, Loc))); + + Append_To (Extra_Formal_Statements, + Make_Assignment_Statement (Loc, + Name => + New_Occurrence_Of (Extra_Parameter, Loc), + Expression => + PolyORB_Support.Helpers.Build_From_Any_Call ( + Etype (Extra_Parameter), + New_Occurrence_Of (Extra_Any, Loc), + Decls))); + Set_Extra_Constrained (Object, Formal_Entity); + + end; + end if; + end; + + Next (Current_Parameter); + end loop; + + Append_To (Outer_Statements, + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (RTE (RE_Request_Arguments), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Request_Parameter, Loc), + New_Occurrence_Of (Arguments, Loc)))); + + Append_List_To (Statements, Extra_Formal_Statements); + + if Nkind (Specification (Vis_Decl)) = N_Function_Specification then + + -- The remote subprogram is a function. We build an inner block to + -- be able to hold a potentially unconstrained result in a + -- variable. + + declare + Etyp : constant Entity_Id := + Etype (Result_Definition (Specification (Vis_Decl))); + Result : constant Node_Id := + Make_Defining_Identifier (Loc, + New_Internal_Name ('R')); + begin + Inner_Decls := New_List ( + Make_Object_Declaration (Loc, + Defining_Identifier => Result, + Constant_Present => True, + Object_Definition => New_Occurrence_Of (Etyp, Loc), + Expression => + Make_Function_Call (Loc, + Name => Called_Subprogram, + Parameter_Associations => Parameter_List))); + + Set_Etype (Result, Etyp); + Append_To (After_Statements, + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (RTE (RE_Set_Result), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Request_Parameter, Loc), + PolyORB_Support.Helpers.Build_To_Any_Call ( + New_Occurrence_Of (Result, Loc), + Decls)))); + -- A DSA function does not have out or inout arguments + end; + + Append_To (Statements, + Make_Block_Statement (Loc, + Declarations => Inner_Decls, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => After_Statements))); + + else + -- The remote subprogram is a procedure. We do not need any inner + -- block in this case. No specific processing is required here for + -- the dynamically asynchronous case: the indication of whether + -- call is asynchronous or not is managed by the Sync_Scope + -- attibute of the request, and is handled entirely in the + -- protocol layer. + + Append_To (After_Statements, + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (RTE (RE_Request_Set_Out), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Request_Parameter, Loc)))); + + Append_To (Statements, + Make_Procedure_Call_Statement (Loc, + Name => Called_Subprogram, + Parameter_Associations => Parameter_List)); + + Append_List_To (Statements, After_Statements); + end if; + + Subp_Spec := + Make_Procedure_Specification (Loc, + Defining_Unit_Name => + Make_Defining_Identifier (Loc, New_Internal_Name ('F')), + + Parameter_Specifications => New_List ( + Make_Parameter_Specification (Loc, + Defining_Identifier => Request_Parameter, + Parameter_Type => + New_Occurrence_Of (RTE (RE_Request_Access), Loc)))); + + -- An exception raised during the execution of an incoming + -- remote subprogram call and that needs to be sent back + -- to the caller is propagated by the receiving stubs, and + -- will be handled by the caller (the distribution runtime). + + if Asynchronous and then not Dynamically_Asynchronous then + + -- For an asynchronous procedure, add a null exception handler + + Excep_Handlers := New_List ( + Make_Exception_Handler (Loc, + Exception_Choices => New_List (Make_Others_Choice (Loc)), + Statements => New_List (Make_Null_Statement (Loc)))); + + else + + -- In the other cases, if an exception is raised, then the + -- exception occurrence is propagated. + + null; + end if; + + Append_To (Outer_Statements, + Make_Block_Statement (Loc, + Declarations => + Decls, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => Statements))); + + return + Make_Subprogram_Body (Loc, + Specification => Subp_Spec, + Declarations => Outer_Decls, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => Outer_Statements, + Exception_Handlers => Excep_Handlers)); + end Build_Subprogram_Receiving_Stubs; + ------------- + -- Helpers -- + ------------- + + package body Helpers is + + ----------------------- + -- Local Subprograms -- + ----------------------- + + function Find_Numeric_Representation + (Typ : Entity_Id) return Entity_Id; + -- Given a numeric type Typ, return the smallest integer or floarting + -- point type from Standard, or the smallest unsigned (modular) type + -- from System.Unsigned_Types, whose range encompasses that of Typ. + + function Make_Stream_Procedure_Function_Name + (Loc : Source_Ptr; + Typ : Entity_Id; + Nam : Name_Id) return Entity_Id; + -- Return the name to be assigned for stream subprogram Nam of Typ. + -- (copied from exp_strm.adb, should be shared???) + + ------------------------------------------------------------ + -- Common subprograms for building various tree fragments -- + ------------------------------------------------------------ + + function Build_Get_Aggregate_Element + (Loc : Source_Ptr; + Any : Entity_Id; + TC : Node_Id; + Idx : Node_Id) return Node_Id; + -- Build a call to Get_Aggregate_Element on Any + -- for typecode TC, returning the Idx'th element. + + generic + Subprogram : Entity_Id; + -- Reference location for constructed nodes + + Arry : Entity_Id; + -- For 'Range and Etype + + Indices : List_Id; + -- For the construction of the innermost element expression + + with procedure Add_Process_Element + (Stmts : List_Id; + Any : Entity_Id; + Counter : Entity_Id; + Datum : Node_Id); + + procedure Append_Array_Traversal + (Stmts : List_Id; + Any : Entity_Id; + Counter : Entity_Id := Empty; + Depth : Pos := 1); + -- Build nested loop statements that iterate over the elements of an + -- array Arry. The statement(s) built by Add_Process_Element are + -- executed for each element; Indices is the list of indices to be + -- used in the construction of the indexed component that denotes the + -- current element. Subprogram is the entity for the subprogram for + -- which this iterator is generated. The generated statements are + -- appended to Stmts. + + generic + Rec : Entity_Id; + -- The record entity being dealt with + + with procedure Add_Process_Element + (Stmts : List_Id; + Container : Node_Or_Entity_Id; + Counter : in out Int; + Rec : Entity_Id; + Field : Node_Id); + -- Rec is the instance of the record type, or Empty. + -- Field is either the N_Defining_Identifier for a component, + -- or an N_Variant_Part. + + procedure Append_Record_Traversal + (Stmts : List_Id; + Clist : Node_Id; + Container : Node_Or_Entity_Id; + Counter : in out Int); + -- Process component list Clist. Individual fields are passed + -- to Field_Processing. Each variant part is also processed. + -- Container is the outer Any (for From_Any/To_Any), + -- the outer typecode (for TC) to which the operation applies. + + ----------------------------- + -- Append_Record_Traversal -- + ----------------------------- + + procedure Append_Record_Traversal + (Stmts : List_Id; + Clist : Node_Id; + Container : Node_Or_Entity_Id; + Counter : in out Int) + is + CI : constant List_Id := Component_Items (Clist); + VP : constant Node_Id := Variant_Part (Clist); + + Item : Node_Id := First (CI); + Def : Entity_Id; + + begin + while Present (Item) loop + Def := Defining_Identifier (Item); + if not Is_Internal_Name (Chars (Def)) then + Add_Process_Element + (Stmts, Container, Counter, Rec, Def); + end if; + Next (Item); + end loop; + + if Present (VP) then + Add_Process_Element (Stmts, Container, Counter, Rec, VP); + end if; + end Append_Record_Traversal; + + ------------------------- + -- Build_From_Any_Call -- + ------------------------- + + function Build_From_Any_Call + (Typ : Entity_Id; + N : Node_Id; + Decls : List_Id) return Node_Id + is + Loc : constant Source_Ptr := Sloc (N); + + U_Type : Entity_Id := Underlying_Type (Typ); + + Fnam : Entity_Id := Empty; + Lib_RE : RE_Id := RE_Null; + + begin + + -- First simple case where the From_Any function is present + -- in the type's TSS. + + Fnam := Find_Inherited_TSS (U_Type, TSS_From_Any); + + if Sloc (U_Type) <= Standard_Location then + U_Type := Base_Type (U_Type); + end if; + + -- Check first for Boolean and Character. These are enumeration + -- types, but we treat them specially, since they may require + -- special handling in the transfer protocol. However, this + -- special handling only applies if they have standard + -- representation, otherwise they are treated like any other + -- enumeration type. + + if Present (Fnam) then + null; + + elsif U_Type = Standard_Boolean then + Lib_RE := RE_FA_B; + + elsif U_Type = Standard_Character then + Lib_RE := RE_FA_C; + + elsif U_Type = Standard_Wide_Character then + Lib_RE := RE_FA_WC; + + elsif U_Type = Standard_Wide_Wide_Character then + Lib_RE := RE_FA_WWC; + + -- Floating point types + + elsif U_Type = Standard_Short_Float then + Lib_RE := RE_FA_SF; + + elsif U_Type = Standard_Float then + Lib_RE := RE_FA_F; + + elsif U_Type = Standard_Long_Float then + Lib_RE := RE_FA_LF; + + elsif U_Type = Standard_Long_Long_Float then + Lib_RE := RE_FA_LLF; + + -- Integer types + + elsif U_Type = Etype (Standard_Short_Short_Integer) then + Lib_RE := RE_FA_SSI; + + elsif U_Type = Etype (Standard_Short_Integer) then + Lib_RE := RE_FA_SI; + + elsif U_Type = Etype (Standard_Integer) then + Lib_RE := RE_FA_I; + + elsif U_Type = Etype (Standard_Long_Integer) then + Lib_RE := RE_FA_LI; + + elsif U_Type = Etype (Standard_Long_Long_Integer) then + Lib_RE := RE_FA_LLI; + + -- Unsigned integer types + + elsif U_Type = RTE (RE_Short_Short_Unsigned) then + Lib_RE := RE_FA_SSU; + + elsif U_Type = RTE (RE_Short_Unsigned) then + Lib_RE := RE_FA_SU; + + elsif U_Type = RTE (RE_Unsigned) then + Lib_RE := RE_FA_U; + + elsif U_Type = RTE (RE_Long_Unsigned) then + Lib_RE := RE_FA_LU; + + elsif U_Type = RTE (RE_Long_Long_Unsigned) then + Lib_RE := RE_FA_LLU; + + elsif U_Type = Standard_String then + Lib_RE := RE_FA_String; + + -- Other (non-primitive) types + + else + declare + Decl : Entity_Id; + begin + Build_From_Any_Function (Loc, U_Type, Decl, Fnam); + Append_To (Decls, Decl); + end; + end if; + + -- Call the function + + if Lib_RE /= RE_Null then + pragma Assert (No (Fnam)); + Fnam := RTE (Lib_RE); + end if; + + return + Make_Function_Call (Loc, + Name => New_Occurrence_Of (Fnam, Loc), + Parameter_Associations => New_List (N)); + end Build_From_Any_Call; + + ----------------------------- + -- Build_From_Any_Function -- + ----------------------------- + + procedure Build_From_Any_Function + (Loc : Source_Ptr; + Typ : Entity_Id; + Decl : out Node_Id; + Fnam : out Entity_Id) + is + Spec : Node_Id; + Decls : constant List_Id := New_List; + Stms : constant List_Id := New_List; + Any_Parameter : constant Entity_Id + := Make_Defining_Identifier (Loc, New_Internal_Name ('A')); + begin + Fnam := Make_Stream_Procedure_Function_Name (Loc, + Typ, Name_uFrom_Any); + + Spec := + Make_Function_Specification (Loc, + Defining_Unit_Name => Fnam, + Parameter_Specifications => New_List ( + Make_Parameter_Specification (Loc, + Defining_Identifier => + Any_Parameter, + Parameter_Type => + New_Occurrence_Of (RTE (RE_Any), Loc))), + Result_Definition => New_Occurrence_Of (Typ, Loc)); + + -- The following is taken care of by Exp_Dist.Add_RACW_From_Any + + pragma Assert + (not (Is_Remote_Access_To_Class_Wide_Type (Typ))); + + if Is_Derived_Type (Typ) + and then not Is_Tagged_Type (Typ) + then + Append_To (Stms, + Make_Return_Statement (Loc, + Expression => + OK_Convert_To ( + Typ, + Build_From_Any_Call ( + Root_Type (Typ), + New_Occurrence_Of (Any_Parameter, Loc), + Decls)))); + + elsif Is_Record_Type (Typ) + and then not Is_Derived_Type (Typ) + and then not Is_Tagged_Type (Typ) + then + if Nkind (Declaration_Node (Typ)) = N_Subtype_Declaration then + Append_To (Stms, + Make_Return_Statement (Loc, + Expression => + OK_Convert_To ( + Typ, + Build_From_Any_Call ( + Etype (Typ), + New_Occurrence_Of (Any_Parameter, Loc), + Decls)))); + else + declare + Disc : Entity_Id := Empty; + Discriminant_Associations : List_Id; + Rdef : constant Node_Id := + Type_Definition (Declaration_Node (Typ)); + Component_Counter : Int := 0; + + -- The returned object + + Res : constant Entity_Id := + Make_Defining_Identifier (Loc, + New_Internal_Name ('R')); + + Res_Definition : Node_Id := New_Occurrence_Of (Typ, Loc); + + procedure FA_Rec_Add_Process_Element + (Stmts : List_Id; + Any : Entity_Id; + Counter : in out Int; + Rec : Entity_Id; + Field : Node_Id); + + procedure FA_Append_Record_Traversal is + new Append_Record_Traversal + (Rec => Res, + Add_Process_Element => FA_Rec_Add_Process_Element); + + -------------------------------- + -- FA_Rec_Add_Process_Element -- + -------------------------------- + + procedure FA_Rec_Add_Process_Element + (Stmts : List_Id; + Any : Entity_Id; + Counter : in out Int; + Rec : Entity_Id; + Field : Node_Id) + is + begin + if Nkind (Field) = N_Defining_Identifier then + + -- A regular component + + Append_To (Stmts, + Make_Assignment_Statement (Loc, + Name => Make_Selected_Component (Loc, + Prefix => + New_Occurrence_Of (Rec, Loc), + Selector_Name => + New_Occurrence_Of (Field, Loc)), + Expression => + Build_From_Any_Call (Etype (Field), + Build_Get_Aggregate_Element (Loc, + Any => Any, + Tc => Build_TypeCode_Call (Loc, + Etype (Field), Decls), + Idx => Make_Integer_Literal (Loc, + Counter)), + Decls))); + + else + -- A variant part + + declare + Variant : Node_Id; + Struct_Counter : Int := 0; + + Block_Decls : constant List_Id := New_List; + Block_Stmts : constant List_Id := New_List; + VP_Stmts : List_Id; + + Alt_List : constant List_Id := New_List; + Choice_List : List_Id; + + Struct_Any : constant Entity_Id := + Make_Defining_Identifier (Loc, + New_Internal_Name ('S')); + + begin + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => + Struct_Any, + Constant_Present => + True, + Object_Definition => + New_Occurrence_Of (RTE (RE_Any), Loc), + Expression => + Make_Function_Call (Loc, + Name => New_Occurrence_Of ( + RTE (RE_Extract_Union_Value), Loc), + Parameter_Associations => New_List ( + Build_Get_Aggregate_Element (Loc, + Any => Any, + Tc => Make_Function_Call (Loc, + Name => New_Occurrence_Of ( + RTE (RE_Any_Member_Type), Loc), + Parameter_Associations => + New_List ( + New_Occurrence_Of (Any, Loc), + Make_Integer_Literal (Loc, + Counter))), + Idx => Make_Integer_Literal (Loc, + Counter)))))); + + Append_To (Stmts, + Make_Block_Statement (Loc, + Declarations => + Block_Decls, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => Block_Stmts))); + + Append_To (Block_Stmts, + Make_Case_Statement (Loc, + Expression => + Make_Selected_Component (Loc, + Prefix => Rec, + Selector_Name => + Chars (Name (Field))), + Alternatives => + Alt_List)); + + Variant := First_Non_Pragma (Variants (Field)); + + while Present (Variant) loop + Choice_List := New_Copy_List_Tree + (Discrete_Choices (Variant)); + + VP_Stmts := New_List; + FA_Append_Record_Traversal ( + Stmts => VP_Stmts, + Clist => Component_List (Variant), + Container => Struct_Any, + Counter => Struct_Counter); + + Append_To (Alt_List, + Make_Case_Statement_Alternative (Loc, + Discrete_Choices => Choice_List, + Statements => + VP_Stmts)); + Next_Non_Pragma (Variant); + end loop; + end; + end if; + Counter := Counter + 1; + end FA_Rec_Add_Process_Element; + + begin + -- First all discriminants + + if Has_Discriminants (Typ) then + Disc := First_Discriminant (Typ); + Discriminant_Associations := New_List; + + while Present (Disc) loop + declare + Disc_Var_Name : constant Entity_Id := + Make_Defining_Identifier (Loc, Chars (Disc)); + Disc_Type : constant Entity_Id := + Etype (Disc); + begin + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => + Disc_Var_Name, + Constant_Present => True, + Object_Definition => + New_Occurrence_Of (Disc_Type, Loc), + Expression => + Build_From_Any_Call (Etype (Disc), + Build_Get_Aggregate_Element (Loc, + Any => Any_Parameter, + Tc => Build_TypeCode_Call + (Loc, Etype (Disc), Decls), + Idx => Make_Integer_Literal + (Loc, Component_Counter)), + Decls))); + Component_Counter := Component_Counter + 1; + + Append_To (Discriminant_Associations, + Make_Discriminant_Association (Loc, + Selector_Names => New_List ( + New_Occurrence_Of (Disc, Loc)), + Expression => + New_Occurrence_Of (Disc_Var_Name, Loc))); + end; + Next_Discriminant (Disc); + end loop; + + Res_Definition := Make_Subtype_Indication (Loc, + Subtype_Mark => Res_Definition, + Constraint => + Make_Index_Or_Discriminant_Constraint (Loc, + Discriminant_Associations)); + end if; + + -- Now we have all the discriminants in variables, we can + -- declared a constrained object. Note that we are not + -- initializing (non-discriminant) components directly in + -- the object declarations, because which fields to + -- initialize depends (at run time) on the discriminant + -- values. + + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => + Res, + Object_Definition => + Res_Definition)); + + -- ... then all components + + FA_Append_Record_Traversal (Stms, + Clist => Component_List (Rdef), + Container => Any_Parameter, + Counter => Component_Counter); + + Append_To (Stms, + Make_Return_Statement (Loc, + Expression => New_Occurrence_Of (Res, Loc))); + end; + end if; + + elsif Is_Array_Type (Typ) then + declare + Constrained : constant Boolean := Is_Constrained (Typ); + + procedure FA_Ary_Add_Process_Element + (Stmts : List_Id; + Any : Entity_Id; + Counter : Entity_Id; + Datum : Node_Id); + -- Assign the current element (as identified by Counter) of + -- Any to the variable denoted by name Datum, and advance + -- Counter by 1. If Datum is not an Any, a call to From_Any + -- for its type is inserted. + + -------------------------------- + -- FA_Ary_Add_Process_Element -- + -------------------------------- + + procedure FA_Ary_Add_Process_Element + (Stmts : List_Id; + Any : Entity_Id; + Counter : Entity_Id; + Datum : Node_Id) + is + Assignment : constant Node_Id := + Make_Assignment_Statement (Loc, + Name => Datum, + Expression => Empty); + + Element_Any : constant Node_Id := + Build_Get_Aggregate_Element (Loc, + Any => Any, + Tc => Build_TypeCode_Call (Loc, + Etype (Datum), Decls), + Idx => New_Occurrence_Of (Counter, Loc)); + + begin + -- Note: here we *prepend* statements to Stmts, so + -- we must do it in reverse order. + + Prepend_To (Stmts, + Make_Assignment_Statement (Loc, + Name => + New_Occurrence_Of (Counter, Loc), + Expression => + Make_Op_Add (Loc, + Left_Opnd => + New_Occurrence_Of (Counter, Loc), + Right_Opnd => + Make_Integer_Literal (Loc, 1)))); + + if Nkind (Datum) /= N_Attribute_Reference then + + -- We ignore the value of the length of each + -- dimension, since the target array has already + -- been constrained anyway. + + if Etype (Datum) /= RTE (RE_Any) then + Set_Expression (Assignment, + Build_From_Any_Call ( + Component_Type (Typ), + Element_Any, + Decls)); + else + Set_Expression (Assignment, Element_Any); + end if; + Prepend_To (Stmts, Assignment); + end if; + end FA_Ary_Add_Process_Element; + + Counter : constant Entity_Id := + Make_Defining_Identifier (Loc, Name_J); + + Initial_Counter_Value : Int := 0; + + Component_TC : constant Entity_Id := + Make_Defining_Identifier (Loc, Name_T); + + Res : constant Entity_Id := + Make_Defining_Identifier (Loc, Name_R); + + procedure Append_From_Any_Array_Iterator is + new Append_Array_Traversal ( + Subprogram => Fnam, + Arry => Res, + Indices => New_List, + Add_Process_Element => FA_Ary_Add_Process_Element); + + Res_Subtype_Indication : Node_Id := + New_Occurrence_Of (Typ, Loc); + + begin + if not Constrained then + declare + Ndim : constant Int := Number_Dimensions (Typ); + Lnam : Name_Id; + Hnam : Name_Id; + Indx : Node_Id := First_Index (Typ); + Indt : Entity_Id; + + Ranges : constant List_Id := New_List; + + begin + for J in 1 .. Ndim loop + Lnam := New_External_Name ('L', J); + Hnam := New_External_Name ('H', J); + Indt := Etype (Indx); + + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => + Make_Defining_Identifier (Loc, Lnam), + Constant_Present => + True, + Object_Definition => + New_Occurrence_Of (Indt, Loc), + Expression => + Build_From_Any_Call ( + Indt, + Build_Get_Aggregate_Element (Loc, + Any => Any_Parameter, + Tc => Build_TypeCode_Call (Loc, + Indt, Decls), + Idx => Make_Integer_Literal (Loc, J - 1)), + Decls))); + + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => + Make_Defining_Identifier (Loc, Hnam), + Constant_Present => + True, + Object_Definition => + New_Occurrence_Of (Indt, Loc), + Expression => Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Indt, Loc), + Attribute_Name => Name_Val, + Expressions => New_List ( + Make_Op_Subtract (Loc, + Left_Opnd => + Make_Op_Add (Loc, + Left_Opnd => + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Indt, Loc), + Attribute_Name => + Name_Pos, + Expressions => New_List ( + Make_Identifier (Loc, Lnam))), + Right_Opnd => + Make_Function_Call (Loc, + Name => New_Occurrence_Of (RTE ( + RE_Get_Nested_Sequence_Length), + Loc), + Parameter_Associations => + New_List ( + New_Occurrence_Of ( + Any_Parameter, Loc), + Make_Integer_Literal (Loc, + J)))), + Right_Opnd => + Make_Integer_Literal (Loc, 1)))))); + + Append_To (Ranges, + Make_Range (Loc, + Low_Bound => Make_Identifier (Loc, Lnam), + High_Bound => Make_Identifier (Loc, Hnam))); + + Next_Index (Indx); + end loop; + + -- Now we have all the necessary bound information: + -- apply the set of range constraints to the + -- (unconstrained) nominal subtype of Res. + + Initial_Counter_Value := Ndim; + Res_Subtype_Indication := Make_Subtype_Indication (Loc, + Subtype_Mark => + Res_Subtype_Indication, + Constraint => + Make_Index_Or_Discriminant_Constraint (Loc, + Constraints => Ranges)); + end; + end if; + + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Res, + Object_Definition => Res_Subtype_Indication)); + Set_Etype (Res, Typ); + + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Counter, + Object_Definition => + New_Occurrence_Of (RTE (RE_Long_Unsigned), Loc), + Expression => + Make_Integer_Literal (Loc, Initial_Counter_Value))); + + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Component_TC, + Constant_Present => True, + Object_Definition => + New_Occurrence_Of (RTE (RE_TypeCode), Loc), + Expression => + Build_TypeCode_Call (Loc, + Component_Type (Typ), Decls))); + + Append_From_Any_Array_Iterator (Stms, + Any_Parameter, Counter); + + Append_To (Stms, + Make_Return_Statement (Loc, + Expression => New_Occurrence_Of (Res, Loc))); + end; + + elsif Is_Integer_Type (Typ) or else Is_Unsigned_Type (Typ) then + Append_To (Stms, + Make_Return_Statement (Loc, + Expression => + Unchecked_Convert_To ( + Typ, + Build_From_Any_Call ( + Find_Numeric_Representation (Typ), + New_Occurrence_Of (Any_Parameter, Loc), + Decls)))); + + else + -- Default: type is represented as an opaque sequence of bytes + + declare + Strm : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => New_Internal_Name ('S')); + Res : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => New_Internal_Name ('R')); + + begin + -- Strm : Buffer_Stream_Type; + + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => + Strm, + Aliased_Present => + True, + Object_Definition => + New_Occurrence_Of (RTE (RE_Buffer_Stream_Type), Loc))); + + -- Any_To_BS (Strm, A); + + Append_To (Stms, + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (RTE (RE_Any_To_BS), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Any_Parameter, Loc), + New_Occurrence_Of (Strm, Loc)))); + + -- declare + -- Res : constant T := T'Input (Strm); + -- begin + -- Release_Buffer (Strm); + -- return Res; + -- end; + + Append_To (Stms, Make_Block_Statement (Loc, + Declarations => New_List ( + Make_Object_Declaration (Loc, + Defining_Identifier => Res, + Constant_Present => True, + Object_Definition => + New_Occurrence_Of (Typ, Loc), + Expression => + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Typ, Loc), + Attribute_Name => Name_Input, + Expressions => New_List ( + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Strm, Loc), + Attribute_Name => Name_Access))))), + + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => New_List ( + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (RTE (RE_Release_Buffer), Loc), + Parameter_Associations => + New_List ( + New_Occurrence_Of (Strm, Loc))), + Make_Return_Statement (Loc, + Expression => New_Occurrence_Of (Res, Loc)))))); + + end; + end if; + + Decl := + Make_Subprogram_Body (Loc, + Specification => Spec, + Declarations => Decls, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => Stms)); + end Build_From_Any_Function; + + --------------------------------- + -- Build_Get_Aggregate_Element -- + --------------------------------- + + function Build_Get_Aggregate_Element + (Loc : Source_Ptr; + Any : Entity_Id; + TC : Node_Id; + Idx : Node_Id) return Node_Id + is + begin + return Make_Function_Call (Loc, + Name => + New_Occurrence_Of ( + RTE (RE_Get_Aggregate_Element), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Any, Loc), + TC, + Idx)); + end Build_Get_Aggregate_Element; + + ------------------------- + -- Build_Reposiroty_Id -- + ------------------------- + + procedure Build_Name_And_Repository_Id + (E : Entity_Id; + Name_Str : out String_Id; + Repo_Id_Str : out String_Id) + is + begin + Start_String; + Store_String_Chars ("DSA:"); + Get_Library_Unit_Name_String (Scope (E)); + Store_String_Chars ( + Name_Buffer (Name_Buffer'First + .. Name_Buffer'First + Name_Len - 1)); + Store_String_Char ('.'); + Get_Name_String (Chars (E)); + Store_String_Chars ( + Name_Buffer (Name_Buffer'First + .. Name_Buffer'First + Name_Len - 1)); + Store_String_Chars (":1.0"); + Repo_Id_Str := End_String; + Name_Str := String_From_Name_Buffer; + end Build_Name_And_Repository_Id; + + ----------------------- + -- Build_To_Any_Call -- + ----------------------- + + function Build_To_Any_Call + (N : Node_Id; + Decls : List_Id) return Node_Id + is + Loc : constant Source_Ptr := Sloc (N); + + Typ : Entity_Id := Etype (N); + U_Type : Entity_Id; + + Fnam : Entity_Id := Empty; + Lib_RE : RE_Id := RE_Null; + + begin + -- If N is a selected component, then maybe its Etype + -- has not been set yet: try to use the Etype of the + -- selector_name in that case. + + if No (Typ) and then Nkind (N) = N_Selected_Component then + Typ := Etype (Selector_Name (N)); + end if; + pragma Assert (Present (Typ)); + + -- The full view, if Typ is private; the completion, + -- if Typ is incomplete. + + U_Type := Underlying_Type (Typ); + + -- First simple case where the To_Any function is present + -- in the type's TSS. + + Fnam := Find_Inherited_TSS (U_Type, TSS_To_Any); + + -- Check first for Boolean and Character. These are enumeration + -- types, but we treat them specially, since they may require + -- special handling in the transfer protocol. However, this + -- special handling only applies if they have standard + -- representation, otherwise they are treated like any other + -- enumeration type. + + if Sloc (U_Type) <= Standard_Location then + U_Type := Base_Type (U_Type); + end if; + + if Present (Fnam) then + null; + + elsif U_Type = Standard_Boolean then + Lib_RE := RE_TA_B; + + elsif U_Type = Standard_Character then + Lib_RE := RE_TA_C; + + elsif U_Type = Standard_Wide_Character then + Lib_RE := RE_TA_WC; + + elsif U_Type = Standard_Wide_Wide_Character then + Lib_RE := RE_TA_WWC; + + -- Floating point types + + elsif U_Type = Standard_Short_Float then + Lib_RE := RE_TA_SF; + + elsif U_Type = Standard_Float then + Lib_RE := RE_TA_F; + + elsif U_Type = Standard_Long_Float then + Lib_RE := RE_TA_LF; + + elsif U_Type = Standard_Long_Long_Float then + Lib_RE := RE_TA_LLF; + + -- Integer types + + elsif U_Type = Etype (Standard_Short_Short_Integer) then + Lib_RE := RE_TA_SSI; + + elsif U_Type = Etype (Standard_Short_Integer) then + Lib_RE := RE_TA_SI; + + elsif U_Type = Etype (Standard_Integer) then + Lib_RE := RE_TA_I; + + elsif U_Type = Etype (Standard_Long_Integer) then + Lib_RE := RE_TA_LI; + + elsif U_Type = Etype (Standard_Long_Long_Integer) then + Lib_RE := RE_TA_LLI; + + -- Unsigned integer types + + elsif U_Type = RTE (RE_Short_Short_Unsigned) then + Lib_RE := RE_TA_SSU; + + elsif U_Type = RTE (RE_Short_Unsigned) then + Lib_RE := RE_TA_SU; + + elsif U_Type = RTE (RE_Unsigned) then + Lib_RE := RE_TA_U; + + elsif U_Type = RTE (RE_Long_Unsigned) then + Lib_RE := RE_TA_LU; + + elsif U_Type = RTE (RE_Long_Long_Unsigned) then + Lib_RE := RE_TA_LLU; + + elsif U_Type = Standard_String then + Lib_RE := RE_TA_String; + + elsif U_Type = Underlying_Type (RTE (RE_TypeCode)) then + Lib_RE := RE_TA_TC; + + -- Other (non-primitive) types + + else + declare + Decl : Entity_Id; + begin + Build_To_Any_Function (Loc, U_Type, Decl, Fnam); + Append_To (Decls, Decl); + end; + end if; + + -- Call the function + + if Lib_RE /= RE_Null then + pragma Assert (No (Fnam)); + Fnam := RTE (Lib_RE); + end if; + + return + Make_Function_Call (Loc, + Name => New_Occurrence_Of (Fnam, Loc), + Parameter_Associations => New_List (N)); + end Build_To_Any_Call; + + --------------------------- + -- Build_To_Any_Function -- + --------------------------- + + procedure Build_To_Any_Function + (Loc : Source_Ptr; + Typ : Entity_Id; + Decl : out Node_Id; + Fnam : out Entity_Id) + is + Spec : Node_Id; + Decls : constant List_Id := New_List; + Stms : constant List_Id := New_List; + + Expr_Parameter : constant Entity_Id := + Make_Defining_Identifier (Loc, Name_E); + + Any : constant Entity_Id := + Make_Defining_Identifier (Loc, Name_A); + + Any_Decl : Node_Id; + Result_TC : Node_Id := Build_TypeCode_Call (Loc, Typ, Decls); + + begin + Fnam := Make_Stream_Procedure_Function_Name (Loc, + Typ, Name_uTo_Any); + + Spec := + Make_Function_Specification (Loc, + Defining_Unit_Name => Fnam, + Parameter_Specifications => New_List ( + Make_Parameter_Specification (Loc, + Defining_Identifier => + Expr_Parameter, + Parameter_Type => + New_Occurrence_Of (Typ, Loc))), + Result_Definition => New_Occurrence_Of (RTE (RE_Any), Loc)); + Set_Etype (Expr_Parameter, Typ); + + Any_Decl := + Make_Object_Declaration (Loc, + Defining_Identifier => + Any, + Object_Definition => + New_Occurrence_Of (RTE (RE_Any), Loc)); + + if Is_Derived_Type (Typ) and then not Is_Tagged_Type (Typ) then + declare + Rt_Type : constant Entity_Id + := Root_Type (Typ); + Expr : constant Node_Id + := OK_Convert_To ( + Rt_Type, + New_Occurrence_Of (Expr_Parameter, Loc)); + begin + Set_Expression (Any_Decl, Build_To_Any_Call (Expr, Decls)); + end; + + elsif Is_Record_Type (Typ) and then not Is_Tagged_Type (Typ) then + if Nkind (Declaration_Node (Typ)) = N_Subtype_Declaration then + declare + Rt_Type : constant Entity_Id + := Etype (Typ); + Expr : constant Node_Id + := OK_Convert_To ( + Rt_Type, + New_Occurrence_Of (Expr_Parameter, Loc)); + + begin + Set_Expression (Any_Decl, + Build_To_Any_Call (Expr, Decls)); + end; + + else + declare + Disc : Entity_Id := Empty; + Rdef : constant Node_Id := + Type_Definition (Declaration_Node (Typ)); + Counter : Int := 0; + Elements : constant List_Id := New_List; + + procedure TA_Rec_Add_Process_Element + (Stmts : List_Id; + Container : Node_Or_Entity_Id; + Counter : in out Int; + Rec : Entity_Id; + Field : Node_Id); + + procedure TA_Append_Record_Traversal is + new Append_Record_Traversal + (Rec => Expr_Parameter, + Add_Process_Element => TA_Rec_Add_Process_Element); + + -------------------------------- + -- TA_Rec_Add_Process_Element -- + -------------------------------- + + procedure TA_Rec_Add_Process_Element + (Stmts : List_Id; + Container : Node_Or_Entity_Id; + Counter : in out Int; + Rec : Entity_Id; + Field : Node_Id) + is + Field_Ref : Node_Id; + + begin + if Nkind (Field) = N_Defining_Identifier then + + -- A regular component + + Field_Ref := Make_Selected_Component (Loc, + Prefix => New_Occurrence_Of (Rec, Loc), + Selector_Name => New_Occurrence_Of (Field, Loc)); + Set_Etype (Field_Ref, Etype (Field)); + + Append_To (Stmts, + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of ( + RTE (RE_Add_Aggregate_Element), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Any, Loc), + Build_To_Any_Call (Field_Ref, Decls)))); + + else + -- A variant part + + declare + Variant : Node_Id; + Struct_Counter : Int := 0; + + Block_Decls : constant List_Id := New_List; + Block_Stmts : constant List_Id := New_List; + VP_Stmts : List_Id; + + Alt_List : constant List_Id := New_List; + Choice_List : List_Id; + + Union_Any : constant Entity_Id := + Make_Defining_Identifier (Loc, + New_Internal_Name ('U')); + + Struct_Any : constant Entity_Id := + Make_Defining_Identifier (Loc, + New_Internal_Name ('S')); + + function Make_Discriminant_Reference + return Node_Id; + -- Build a selected component for the + -- discriminant of this variant part. + + --------------------------------- + -- Make_Discriminant_Reference -- + --------------------------------- + + function Make_Discriminant_Reference + return Node_Id + is + Nod : constant Node_Id := + Make_Selected_Component (Loc, + Prefix => Rec, + Selector_Name => + Chars (Name (Field))); + begin + Set_Etype (Nod, Name (Field)); + return Nod; + end Make_Discriminant_Reference; + + begin + Append_To (Stmts, + Make_Block_Statement (Loc, + Declarations => + Block_Decls, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => Block_Stmts))); + + Append_To (Block_Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Union_Any, + Object_Definition => + New_Occurrence_Of (RTE (RE_Any), Loc), + Expression => + Make_Function_Call (Loc, + Name => New_Occurrence_Of ( + RTE (RE_Create_Any), Loc), + Parameter_Associations => New_List ( + Make_Function_Call (Loc, + Name => + New_Occurrence_Of ( + RTE (RE_Any_Member_Type), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Container, Loc), + Make_Integer_Literal (Loc, + Counter))))))); + + Append_To (Block_Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Struct_Any, + Object_Definition => + New_Occurrence_Of (RTE (RE_Any), Loc), + Expression => + Make_Function_Call (Loc, + Name => New_Occurrence_Of ( + RTE (RE_Create_Any), Loc), + Parameter_Associations => New_List ( + Make_Function_Call (Loc, + Name => + New_Occurrence_Of ( + RTE (RE_Any_Member_Type), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Union_Any, Loc), + Make_Integer_Literal (Loc, + Uint_0))))))); + + Append_To (Block_Stmts, + Make_Case_Statement (Loc, + Expression => + Make_Discriminant_Reference, + Alternatives => + Alt_List)); + + Variant := First_Non_Pragma (Variants (Field)); + while Present (Variant) loop + Choice_List := New_Copy_List_Tree + (Discrete_Choices (Variant)); + + VP_Stmts := New_List; + TA_Append_Record_Traversal ( + Stmts => VP_Stmts, + Clist => Component_List (Variant), + Container => Struct_Any, + Counter => Struct_Counter); + + -- Append discriminant value and inner struct + -- to union aggregate. + + Append_To (VP_Stmts, + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of ( + RTE (RE_Add_Aggregate_Element), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Union_Any, Loc), + Build_To_Any_Call ( + Make_Discriminant_Reference, + Block_Decls)))); + + Append_To (VP_Stmts, + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of ( + RTE (RE_Add_Aggregate_Element), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Union_Any, Loc), + New_Occurrence_Of (Struct_Any, Loc)))); + + -- Append union to outer aggregate + + Append_To (VP_Stmts, + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of ( + RTE (RE_Add_Aggregate_Element), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Container, Loc), + Make_Function_Call (Loc, + Name => New_Occurrence_Of ( + RTE (RE_Any_Aggregate_Build), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of ( + Union_Any, Loc)))))); + + Append_To (Alt_List, + Make_Case_Statement_Alternative (Loc, + Discrete_Choices => Choice_List, + Statements => + VP_Stmts)); + Next_Non_Pragma (Variant); + end loop; + end; + end if; + end TA_Rec_Add_Process_Element; + + begin + -- First all discriminants + + if Has_Discriminants (Typ) then + Disc := First_Discriminant (Typ); + + while Present (Disc) loop + Append_To (Elements, + Make_Component_Association (Loc, + Choices => New_List ( + Make_Integer_Literal (Loc, Counter)), + Expression => + Build_To_Any_Call ( + Make_Selected_Component (Loc, + Prefix => Expr_Parameter, + Selector_Name => Chars (Disc)), + Decls))); + Counter := Counter + 1; + Next_Discriminant (Disc); + end loop; + + else + -- Make elements an empty array + + declare + Dummy_Any : constant Entity_Id := + Make_Defining_Identifier (Loc, + Chars => New_Internal_Name ('A')); + + begin + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Dummy_Any, + Object_Definition => + New_Occurrence_Of (RTE (RE_Any), Loc))); + + Append_To (Elements, + Make_Component_Association (Loc, + Choices => New_List ( + Make_Range (Loc, + Low_Bound => + Make_Integer_Literal (Loc, 1), + High_Bound => + Make_Integer_Literal (Loc, 0))), + Expression => + New_Occurrence_Of (Dummy_Any, Loc))); + end; + end if; + + Set_Expression (Any_Decl, + Make_Function_Call (Loc, + Name => New_Occurrence_Of ( + RTE (RE_Any_Aggregate_Build), Loc), + Parameter_Associations => New_List ( + Result_TC, + Make_Aggregate (Loc, + Component_Associations => Elements)))); + Result_TC := Empty; + + -- ... then all components + + TA_Append_Record_Traversal (Stms, + Clist => Component_List (Rdef), + Container => Any, + Counter => Counter); + end; + end if; + + elsif Is_Array_Type (Typ) then + declare + Constrained : constant Boolean := Is_Constrained (Typ); + + procedure TA_Ary_Add_Process_Element + (Stmts : List_Id; + Any : Entity_Id; + Counter : Entity_Id; + Datum : Node_Id); + + -------------------------------- + -- TA_Ary_Add_Process_Element -- + -------------------------------- + + procedure TA_Ary_Add_Process_Element + (Stmts : List_Id; + Any : Entity_Id; + Counter : Entity_Id; + Datum : Node_Id) + is + pragma Warnings (Off); + pragma Unreferenced (Counter); + pragma Warnings (On); + + Element_Any : Node_Id; + + begin + if Etype (Datum) = RTE (RE_Any) then + Element_Any := Datum; + else + Element_Any := Build_To_Any_Call (Datum, Decls); + end if; + + Append_To (Stmts, + Make_Procedure_Call_Statement (Loc, + Name => New_Occurrence_Of ( + RTE (RE_Add_Aggregate_Element), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Any, Loc), + Element_Any))); + end TA_Ary_Add_Process_Element; + + procedure Append_To_Any_Array_Iterator is + new Append_Array_Traversal ( + Subprogram => Fnam, + Arry => Expr_Parameter, + Indices => New_List, + Add_Process_Element => TA_Ary_Add_Process_Element); + + Index : Node_Id; + + begin + Set_Expression (Any_Decl, + Make_Function_Call (Loc, + Name => + New_Occurrence_Of (RTE (RE_Create_Any), Loc), + Parameter_Associations => New_List (Result_TC))); + Result_TC := Empty; + + if not Constrained then + Index := First_Index (Typ); + for J in 1 .. Number_Dimensions (Typ) loop + Append_To (Stms, + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of ( + RTE (RE_Add_Aggregate_Element), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Any, Loc), + Build_To_Any_Call ( + OK_Convert_To (Etype (Index), + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Expr_Parameter, Loc), + Attribute_Name => Name_First, + Expressions => New_List ( + Make_Integer_Literal (Loc, J)))), + Decls)))); + Next_Index (Index); + end loop; + end if; + + Append_To_Any_Array_Iterator (Stms, Any); + end; + + elsif Is_Integer_Type (Typ) or else Is_Unsigned_Type (Typ) then + Set_Expression (Any_Decl, + Build_To_Any_Call ( + OK_Convert_To ( + Find_Numeric_Representation (Typ), + New_Occurrence_Of (Expr_Parameter, Loc)), + Decls)); + + else + -- Default: type is represented as an opaque sequence of bytes + + declare + Strm : constant Entity_Id := Make_Defining_Identifier (Loc, + New_Internal_Name ('S')); + + begin + -- Strm : aliased Buffer_Stream_Type; + + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => + Strm, + Aliased_Present => + True, + Object_Definition => + New_Occurrence_Of (RTE (RE_Buffer_Stream_Type), Loc))); + + -- Allocate_Buffer (Strm); + + Append_To (Stms, + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (RTE (RE_Allocate_Buffer), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Strm, Loc)))); + + -- T'Output (Strm'Access, E); + + Append_To (Stms, + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Typ, Loc), + Attribute_Name => Name_Output, + Expressions => New_List ( + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Strm, Loc), + Attribute_Name => Name_Access), + New_Occurrence_Of (Expr_Parameter, Loc)))); + + -- BS_To_Any (Strm, A); + + Append_To (Stms, + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (RTE (RE_BS_To_Any), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Strm, Loc), + New_Occurrence_Of (Any, Loc)))); + + -- Release_Buffer (Strm); + + Append_To (Stms, + Make_Procedure_Call_Statement (Loc, + Name => + New_Occurrence_Of (RTE (RE_Release_Buffer), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Strm, Loc)))); + end; + end if; + + Append_To (Decls, Any_Decl); + + if Present (Result_TC) then + Append_To (Stms, + Make_Procedure_Call_Statement (Loc, + Name => New_Occurrence_Of (RTE (RE_Set_TC), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Any, Loc), + Result_TC))); + end if; + + Append_To (Stms, + Make_Return_Statement (Loc, + Expression => New_Occurrence_Of (Any, Loc))); + + Decl := + Make_Subprogram_Body (Loc, + Specification => Spec, + Declarations => Decls, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => Stms)); + end Build_To_Any_Function; + + ------------------------- + -- Build_TypeCode_Call -- + ------------------------- + + function Build_TypeCode_Call + (Loc : Source_Ptr; + Typ : Entity_Id; + Decls : List_Id) return Node_Id + is + U_Type : Entity_Id := Underlying_Type (Typ); + -- The full view, if Typ is private; the completion, + -- if Typ is incomplete. + + Fnam : Entity_Id := Empty; + Lib_RE : RE_Id := RE_Null; + + Expr : Node_Id; + + begin + -- Special case System.PolyORB.Interface.Any: its primitives have + -- not been set yet, so can't call Find_Inherited_TSS. + + if Typ = RTE (RE_Any) then + Fnam := RTE (RE_TC_Any); + + else + -- First simple case where the TypeCode is present + -- in the type's TSS. + + Fnam := Find_Inherited_TSS (U_Type, TSS_TypeCode); + end if; + + if No (Fnam) then + if Sloc (U_Type) <= Standard_Location then + + -- Do not try to build alias typecodes for subtypes from + -- Standard. + + U_Type := Base_Type (U_Type); + end if; + + if U_Type = Standard_Boolean then + Lib_RE := RE_TC_B; + + elsif U_Type = Standard_Character then + Lib_RE := RE_TC_C; + + elsif U_Type = Standard_Wide_Character then + Lib_RE := RE_TC_WC; + + elsif U_Type = Standard_Wide_Wide_Character then + Lib_RE := RE_TC_WWC; + + -- Floating point types + + elsif U_Type = Standard_Short_Float then + Lib_RE := RE_TC_SF; + + elsif U_Type = Standard_Float then + Lib_RE := RE_TC_F; + + elsif U_Type = Standard_Long_Float then + Lib_RE := RE_TC_LF; + + elsif U_Type = Standard_Long_Long_Float then + Lib_RE := RE_TC_LLF; + + -- Integer types (walk back to the base type) + + elsif U_Type = Etype (Standard_Short_Short_Integer) then + Lib_RE := RE_TC_SSI; + + elsif U_Type = Etype (Standard_Short_Integer) then + Lib_RE := RE_TC_SI; + + elsif U_Type = Etype (Standard_Integer) then + Lib_RE := RE_TC_I; + + elsif U_Type = Etype (Standard_Long_Integer) then + Lib_RE := RE_TC_LI; + + elsif U_Type = Etype (Standard_Long_Long_Integer) then + Lib_RE := RE_TC_LLI; + + -- Unsigned integer types + + elsif U_Type = RTE (RE_Short_Short_Unsigned) then + Lib_RE := RE_TC_SSU; + + elsif U_Type = RTE (RE_Short_Unsigned) then + Lib_RE := RE_TC_SU; + + elsif U_Type = RTE (RE_Unsigned) then + Lib_RE := RE_TC_U; + + elsif U_Type = RTE (RE_Long_Unsigned) then + Lib_RE := RE_TC_LU; + + elsif U_Type = RTE (RE_Long_Long_Unsigned) then + Lib_RE := RE_TC_LLU; + + elsif U_Type = Standard_String then + Lib_RE := RE_TC_String; + + -- Other (non-primitive) types + + else + declare + Decl : Entity_Id; + begin + Build_TypeCode_Function (Loc, U_Type, Decl, Fnam); + Append_To (Decls, Decl); + end; + end if; + + if Lib_RE /= RE_Null then + Fnam := RTE (Lib_RE); + end if; + end if; + + -- Call the function + + Expr := + Make_Function_Call (Loc, Name => New_Occurrence_Of (Fnam, Loc)); + + -- Allow Expr to be used as arg to Build_To_Any_Call immediately + + Set_Etype (Expr, RTE (RE_TypeCode)); + + return Expr; + end Build_TypeCode_Call; + + ----------------------------- + -- Build_TypeCode_Function -- + ----------------------------- + + procedure Build_TypeCode_Function + (Loc : Source_Ptr; + Typ : Entity_Id; + Decl : out Node_Id; + Fnam : out Entity_Id) + is + Spec : Node_Id; + Decls : constant List_Id := New_List; + Stms : constant List_Id := New_List; + + TCNam : constant Entity_Id := + Make_Stream_Procedure_Function_Name (Loc, + Typ, Name_uTypeCode); + + Parameters : List_Id; + + procedure Add_String_Parameter + (S : String_Id; + Parameter_List : List_Id); + -- Add a literal for S to Parameters + + procedure Add_TypeCode_Parameter + (TC_Node : Node_Id; + Parameter_List : List_Id); + -- Add the typecode for Typ to Parameters + + procedure Add_Long_Parameter + (Expr_Node : Node_Id; + Parameter_List : List_Id); + -- Add a signed long integer expression to Parameters + + procedure Initialize_Parameter_List + (Name_String : String_Id; + Repo_Id_String : String_Id; + Parameter_List : out List_Id); + -- Return a list that contains the first two parameters + -- for a parameterized typecode: name and repository id. + + function Make_Constructed_TypeCode + (Kind : Entity_Id; + Parameters : List_Id) return Node_Id; + -- Call TC_Build with the given kind and parameters + + procedure Return_Constructed_TypeCode (Kind : Entity_Id); + -- Make a return statement that calls TC_Build with the given + -- typecode kind, and the constructed parameters list. + + procedure Return_Alias_TypeCode (Base_TypeCode : Node_Id); + -- Return a typecode that is a TC_Alias for the given typecode + + -------------------------- + -- Add_String_Parameter -- + -------------------------- + + procedure Add_String_Parameter + (S : String_Id; + Parameter_List : List_Id) + is + begin + Append_To (Parameter_List, + Make_Function_Call (Loc, + Name => + New_Occurrence_Of (RTE (RE_TA_String), Loc), + Parameter_Associations => New_List ( + Make_String_Literal (Loc, S)))); + end Add_String_Parameter; + + ---------------------------- + -- Add_TypeCode_Parameter -- + ---------------------------- + + procedure Add_TypeCode_Parameter + (TC_Node : Node_Id; + Parameter_List : List_Id) + is + begin + Append_To (Parameter_List, + Make_Function_Call (Loc, + Name => + New_Occurrence_Of (RTE (RE_TA_TC), Loc), + Parameter_Associations => New_List ( + TC_Node))); + end Add_TypeCode_Parameter; + + ------------------------ + -- Add_Long_Parameter -- + ------------------------ + + procedure Add_Long_Parameter + (Expr_Node : Node_Id; + Parameter_List : List_Id) + is + begin + Append_To (Parameter_List, + Make_Function_Call (Loc, + Name => + New_Occurrence_Of (RTE (RE_TA_LI), Loc), + Parameter_Associations => New_List (Expr_Node))); + end Add_Long_Parameter; + + ------------------------------- + -- Initialize_Parameter_List -- + ------------------------------- + + procedure Initialize_Parameter_List + (Name_String : String_Id; + Repo_Id_String : String_Id; + Parameter_List : out List_Id) + is + begin + Parameter_List := New_List; + Add_String_Parameter (Name_String, Parameter_List); + Add_String_Parameter (Repo_Id_String, Parameter_List); + end Initialize_Parameter_List; + + --------------------------- + -- Return_Alias_TypeCode -- + --------------------------- + + procedure Return_Alias_TypeCode + (Base_TypeCode : Node_Id) + is + begin + Add_TypeCode_Parameter (Base_TypeCode, Parameters); + Return_Constructed_TypeCode (RTE (RE_TC_Alias)); + end Return_Alias_TypeCode; + + ------------------------------- + -- Make_Constructed_TypeCode -- + ------------------------------- + + function Make_Constructed_TypeCode + (Kind : Entity_Id; + Parameters : List_Id) return Node_Id + is + Constructed_TC : constant Node_Id := + Make_Function_Call (Loc, + Name => + New_Occurrence_Of (RTE (RE_TC_Build), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Kind, Loc), + Make_Aggregate (Loc, + Expressions => Parameters))); + begin + Set_Etype (Constructed_TC, RTE (RE_TypeCode)); + return Constructed_TC; + end Make_Constructed_TypeCode; + + --------------------------------- + -- Return_Constructed_TypeCode -- + --------------------------------- + + procedure Return_Constructed_TypeCode (Kind : Entity_Id) is + begin + Append_To (Stms, + Make_Return_Statement (Loc, + Expression => + Make_Constructed_TypeCode (Kind, Parameters))); + end Return_Constructed_TypeCode; + + ------------------ + -- Record types -- + ------------------ + + procedure TC_Rec_Add_Process_Element + (Params : List_Id; + Any : Entity_Id; + Counter : in out Int; + Rec : Entity_Id; + Field : Node_Id); + + procedure TC_Append_Record_Traversal is + new Append_Record_Traversal ( + Rec => Empty, + Add_Process_Element => TC_Rec_Add_Process_Element); + + -------------------------------- + -- TC_Rec_Add_Process_Element -- + -------------------------------- + + procedure TC_Rec_Add_Process_Element + (Params : List_Id; + Any : Entity_Id; + Counter : in out Int; + Rec : Entity_Id; + Field : Node_Id) + is + pragma Warnings (Off); + pragma Unreferenced (Any, Counter, Rec); + pragma Warnings (On); + + begin + if Nkind (Field) = N_Defining_Identifier then + + -- A regular component + + Add_TypeCode_Parameter ( + Build_TypeCode_Call (Loc, Etype (Field), Decls), Params); + Get_Name_String (Chars (Field)); + Add_String_Parameter (String_From_Name_Buffer, Params); + + else + + -- A variant part + + declare + Discriminant_Type : constant Entity_Id := + Etype (Name (Field)); + + Is_Enum : constant Boolean := + Is_Enumeration_Type (Discriminant_Type); + + Union_TC_Params : List_Id; + + U_Name : constant Name_Id := + New_External_Name (Chars (Typ), 'U', -1); + + Name_Str : String_Id; + Struct_TC_Params : List_Id; + + Variant : Node_Id; + Choice : Node_Id; + Default : constant Node_Id := + Make_Integer_Literal (Loc, -1); + + Dummy_Counter : Int := 0; + + procedure Add_Params_For_Variant_Components; + -- Add a struct TypeCode and a corresponding member name + -- to the union parameter list. + + -- Ordering of declarations is a complete mess in this + -- area, it is supposed to be types/varibles, then + -- subprogram specs, then subprogram bodies ??? + + --------------------------------------- + -- Add_Params_For_Variant_Components -- + --------------------------------------- + + procedure Add_Params_For_Variant_Components + is + S_Name : constant Name_Id := + New_External_Name (U_Name, 'S', -1); + + begin + Get_Name_String (S_Name); + Name_Str := String_From_Name_Buffer; + Initialize_Parameter_List + (Name_Str, Name_Str, Struct_TC_Params); + + -- Build struct parameters + + TC_Append_Record_Traversal (Struct_TC_Params, + Component_List (Variant), + Empty, + Dummy_Counter); + + Add_TypeCode_Parameter + (Make_Constructed_TypeCode + (RTE (RE_TC_Struct), Struct_TC_Params), + Union_TC_Params); + + Add_String_Parameter (Name_Str, Union_TC_Params); + end Add_Params_For_Variant_Components; + + begin + Get_Name_String (U_Name); + Name_Str := String_From_Name_Buffer; + + Initialize_Parameter_List + (Name_Str, Name_Str, Union_TC_Params); + + Add_String_Parameter (Name_Str, Params); + + -- Add union in enclosing parameter list + + Add_TypeCode_Parameter + (Make_Constructed_TypeCode + (RTE (RE_TC_Union), Union_TC_Params), + Parameters); + + -- Build union parameters + + Add_TypeCode_Parameter + (Discriminant_Type, Union_TC_Params); + Add_Long_Parameter (Default, Union_TC_Params); + + Variant := First_Non_Pragma (Variants (Field)); + while Present (Variant) loop + Choice := First (Discrete_Choices (Variant)); + while Present (Choice) loop + case Nkind (Choice) is + when N_Range => + declare + L : constant Uint := + Expr_Value (Low_Bound (Choice)); + H : constant Uint := + Expr_Value (High_Bound (Choice)); + J : Uint := L; + -- 3.8.1(8) guarantees that the bounds of + -- this range are static. + + Expr : Node_Id; + + begin + while J <= H loop + if Is_Enum then + Expr := New_Occurrence_Of ( + Get_Enum_Lit_From_Pos ( + Discriminant_Type, J, Loc), Loc); + else + Expr := + Make_Integer_Literal (Loc, J); + end if; + Append_To (Union_TC_Params, + Build_To_Any_Call (Expr, Decls)); + Add_Params_For_Variant_Components; + J := J + Uint_1; + end loop; + end; + + when N_Others_Choice => + Add_Long_Parameter ( + Make_Integer_Literal (Loc, 0), + Union_TC_Params); + Add_Params_For_Variant_Components; + + when others => + Append_To (Union_TC_Params, + Build_To_Any_Call (Choice, Decls)); + Add_Params_For_Variant_Components; + + end case; + + end loop; + + Next_Non_Pragma (Variant); + end loop; + + end; + end if; + end TC_Rec_Add_Process_Element; + + Type_Name_Str : String_Id; + Type_Repo_Id_Str : String_Id; + + begin + pragma Assert (not Is_Itype (Typ)); + Fnam := TCNam; + + Spec := + Make_Function_Specification (Loc, + Defining_Unit_Name => Fnam, + Parameter_Specifications => Empty_List, + Result_Definition => + New_Occurrence_Of (RTE (RE_TypeCode), Loc)); + + Build_Name_And_Repository_Id (Typ, + Name_Str => Type_Name_Str, Repo_Id_Str => Type_Repo_Id_Str); + Initialize_Parameter_List + (Type_Name_Str, Type_Repo_Id_Str, Parameters); + + if Is_Derived_Type (Typ) + and then not Is_Tagged_Type (Typ) + then + declare + Parent_Type : Entity_Id := Etype (Typ); + begin + + if Is_Itype (Parent_Type) then + + -- Skip implicit base type + + Parent_Type := Etype (Parent_Type); + end if; + + Return_Alias_TypeCode ( + Build_TypeCode_Call (Loc, Parent_Type, Decls)); + end; + + elsif Is_Integer_Type (Typ) + or else Is_Unsigned_Type (Typ) + then + Return_Alias_TypeCode ( + Build_TypeCode_Call (Loc, + Find_Numeric_Representation (Typ), Decls)); + + elsif Is_Record_Type (Typ) + and then not Is_Tagged_Type (Typ) + then + if Nkind (Declaration_Node (Typ)) = N_Subtype_Declaration then + Return_Alias_TypeCode ( + Build_TypeCode_Call (Loc, Etype (Typ), Decls)); + else + declare + Disc : Entity_Id := Empty; + Rdef : constant Node_Id := + Type_Definition (Declaration_Node (Typ)); + Dummy_Counter : Int := 0; + begin + -- First all discriminants + + if Has_Discriminants (Typ) then + Disc := First_Discriminant (Typ); + end if; + while Present (Disc) loop + Add_TypeCode_Parameter ( + Build_TypeCode_Call (Loc, Etype (Disc), Decls), + Parameters); + Get_Name_String (Chars (Disc)); + Add_String_Parameter ( + String_From_Name_Buffer, + Parameters); + Next_Discriminant (Disc); + end loop; + + -- ... then all components + + TC_Append_Record_Traversal + (Parameters, Component_List (Rdef), + Empty, Dummy_Counter); + Return_Constructed_TypeCode (RTE (RE_TC_Struct)); + end; + end if; + + elsif Is_Array_Type (Typ) then + declare + Ndim : constant Pos := Number_Dimensions (Typ); + Inner_TypeCode : Node_Id; + Constrained : constant Boolean := Is_Constrained (Typ); + Indx : Node_Id := First_Index (Typ); + + begin + Inner_TypeCode := Build_TypeCode_Call (Loc, + Component_Type (Typ), + Decls); + + for J in 1 .. Ndim loop + if Constrained then + Inner_TypeCode := Make_Constructed_TypeCode + (RTE (RE_TC_Array), New_List ( + Build_To_Any_Call ( + OK_Convert_To (RTE (RE_Long_Unsigned), + Make_Attribute_Reference (Loc, + Prefix => + New_Occurrence_Of (Typ, Loc), + Attribute_Name => + Name_Length, + Expressions => New_List ( + Make_Integer_Literal (Loc, + Ndim - J + 1)))), + Decls), + Build_To_Any_Call (Inner_TypeCode, Decls))); + + else + -- Unconstrained case: add low bound for each + -- dimension. + + Add_TypeCode_Parameter + (Build_TypeCode_Call (Loc, Etype (Indx), Decls), + Parameters); + Get_Name_String (New_External_Name ('L', J)); + Add_String_Parameter ( + String_From_Name_Buffer, + Parameters); + Next_Index (Indx); + + Inner_TypeCode := Make_Constructed_TypeCode + (RTE (RE_TC_Sequence), New_List ( + Build_To_Any_Call ( + OK_Convert_To (RTE (RE_Long_Unsigned), + Make_Integer_Literal (Loc, 0)), + Decls), + Build_To_Any_Call (Inner_TypeCode, Decls))); + end if; + end loop; + + if Constrained then + Return_Alias_TypeCode (Inner_TypeCode); + else + Add_TypeCode_Parameter (Inner_TypeCode, Parameters); + Start_String; + Store_String_Char ('V'); + Add_String_Parameter (End_String, Parameters); + Return_Constructed_TypeCode (RTE (RE_TC_Struct)); + end if; + end; + + else + -- Default: type is represented as an opaque sequence of bytes + + Return_Alias_TypeCode + (New_Occurrence_Of (RTE (RE_TC_Opaque), Loc)); + end if; + + Decl := + Make_Subprogram_Body (Loc, + Specification => Spec, + Declarations => Decls, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => Stms)); + end Build_TypeCode_Function; + + --------------------------------- + -- Find_Numeric_Representation -- + --------------------------------- + + function Find_Numeric_Representation + (Typ : Entity_Id) return Entity_Id + is + FST : constant Entity_Id := First_Subtype (Typ); + P_Size : constant Uint := Esize (FST); + + begin + if Is_Unsigned_Type (Typ) then + if P_Size <= Standard_Short_Short_Integer_Size then + return RTE (RE_Short_Short_Unsigned); + + elsif P_Size <= Standard_Short_Integer_Size then + return RTE (RE_Short_Unsigned); + + elsif P_Size <= Standard_Integer_Size then + return RTE (RE_Unsigned); + + elsif P_Size <= Standard_Long_Integer_Size then + return RTE (RE_Long_Unsigned); + + else + return RTE (RE_Long_Long_Unsigned); + end if; + + elsif Is_Integer_Type (Typ) then + if P_Size <= Standard_Short_Short_Integer_Size then + return Standard_Short_Short_Integer; + + elsif P_Size <= Standard_Short_Integer_Size then + return Standard_Short_Integer; + + elsif P_Size <= Standard_Integer_Size then + return Standard_Integer; + + elsif P_Size <= Standard_Long_Integer_Size then + return Standard_Long_Integer; + + else + return Standard_Long_Long_Integer; + end if; + + elsif Is_Floating_Point_Type (Typ) then + if P_Size <= Standard_Short_Float_Size then + return Standard_Short_Float; + + elsif P_Size <= Standard_Float_Size then + return Standard_Float; + + elsif P_Size <= Standard_Long_Float_Size then + return Standard_Long_Float; + + else + return Standard_Long_Long_Float; + end if; + + else + raise Program_Error; + end if; + + -- TBD: fixed point types??? + -- TBverified numeric types with a biased representation??? + + end Find_Numeric_Representation; + + --------------------------- + -- Append_Array_Traversal -- + --------------------------- + + procedure Append_Array_Traversal + (Stmts : List_Id; + Any : Entity_Id; + Counter : Entity_Id := Empty; + Depth : Pos := 1) + is + Loc : constant Source_Ptr := Sloc (Subprogram); + Typ : constant Entity_Id := Etype (Arry); + Constrained : constant Boolean := Is_Constrained (Typ); + Ndim : constant Pos := Number_Dimensions (Typ); + + Inner_Any, Inner_Counter : Entity_Id; + + Loop_Stm : Node_Id; + Inner_Stmts : constant List_Id := New_List; + + begin + if Depth > Ndim then + + -- Processing for one element of an array + + declare + Element_Expr : constant Node_Id := + Make_Indexed_Component (Loc, + New_Occurrence_Of (Arry, Loc), + Indices); + + begin + Set_Etype (Element_Expr, Component_Type (Typ)); + Add_Process_Element (Stmts, + Any => Any, + Counter => Counter, + Datum => Element_Expr); + end; + + return; + end if; + + Append_To (Indices, + Make_Identifier (Loc, New_External_Name ('L', Depth))); + + if not Constrained or else Depth > 1 then + Inner_Any := Make_Defining_Identifier (Loc, + New_External_Name ('A', Depth)); + Set_Etype (Inner_Any, RTE (RE_Any)); + else + Inner_Any := Empty; + end if; + + if Present (Counter) then + Inner_Counter := Make_Defining_Identifier (Loc, + New_External_Name ('J', Depth)); + else + Inner_Counter := Empty; + end if; + + declare + Loop_Any : Node_Id := Inner_Any; + begin + + -- For the first dimension of a constrained array, we add + -- elements directly in the corresponding Any; there is no + -- intervening inner Any. + + if No (Loop_Any) then + Loop_Any := Any; + end if; + + Append_Array_Traversal (Inner_Stmts, + Any => Loop_Any, + Counter => Inner_Counter, + Depth => Depth + 1); + end; + + Loop_Stm := + Make_Implicit_Loop_Statement (Subprogram, + Iteration_Scheme => + Make_Iteration_Scheme (Loc, + Loop_Parameter_Specification => + Make_Loop_Parameter_Specification (Loc, + Defining_Identifier => + Make_Defining_Identifier (Loc, + Chars => New_External_Name ('L', Depth)), + + Discrete_Subtype_Definition => + Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Arry, Loc), + Attribute_Name => Name_Range, + + Expressions => New_List ( + Make_Integer_Literal (Loc, Depth))))), + Statements => Inner_Stmts); + + declare + Decls : constant List_Id := New_List; + Dimen_Stmts : constant List_Id := New_List; + Length_Node : Node_Id; + + Inner_Any_TypeCode : constant Entity_Id := + Make_Defining_Identifier (Loc, + New_External_Name ('T', Depth)); + + Inner_Any_TypeCode_Expr : Node_Id; + + begin + if Depth = 1 then + if Constrained then + Inner_Any_TypeCode_Expr := + Make_Function_Call (Loc, + Name => + New_Occurrence_Of (RTE (RE_Get_TC), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Any, Loc))); + else + Inner_Any_TypeCode_Expr := + Make_Function_Call (Loc, + Name => + New_Occurrence_Of (RTE (RE_Any_Member_Type), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Any, Loc), + Make_Integer_Literal (Loc, Ndim))); + end if; + else + Inner_Any_TypeCode_Expr := + Make_Function_Call (Loc, + Name => + New_Occurrence_Of (RTE (RE_Content_Type), Loc), + Parameter_Associations => New_List ( + Make_Identifier (Loc, + New_External_Name ('T', Depth - 1)))); + end if; + + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Inner_Any_TypeCode, + Constant_Present => True, + Object_Definition => New_Occurrence_Of ( + RTE (RE_TypeCode), Loc), + Expression => Inner_Any_TypeCode_Expr)); + + if Present (Inner_Any) then + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Inner_Any, + Object_Definition => + New_Occurrence_Of (RTE (RE_Any), Loc), + Expression => + Make_Function_Call (Loc, + Name => + New_Occurrence_Of ( + RTE (RE_Create_Any), Loc), + Parameter_Associations => New_List ( + New_Occurrence_Of (Inner_Any_TypeCode, Loc))))); + end if; + + if Present (Inner_Counter) then + Append_To (Decls, + Make_Object_Declaration (Loc, + Defining_Identifier => Inner_Counter, + Object_Definition => + New_Occurrence_Of (RTE (RE_Long_Unsigned), Loc), + Expression => + Make_Integer_Literal (Loc, 0))); + end if; + + if not Constrained then + Length_Node := Make_Attribute_Reference (Loc, + Prefix => New_Occurrence_Of (Arry, Loc), + Attribute_Name => Name_Length, + Expressions => + New_List (Make_Integer_Literal (Loc, Depth))); + Set_Etype (Length_Node, RTE (RE_Long_Unsigned)); + + Add_Process_Element (Dimen_Stmts, + Datum => Length_Node, + Any => Inner_Any, + Counter => Inner_Counter); + end if; + + -- Loop_Stm does approrpriate processing for each element + -- of Inner_Any. + + Append_To (Dimen_Stmts, Loop_Stm); + + -- Link outer and inner any + + if Present (Inner_Any) then + Add_Process_Element (Dimen_Stmts, + Any => Any, + Counter => Counter, + Datum => New_Occurrence_Of (Inner_Any, Loc)); + end if; + + Append_To (Stmts, + Make_Block_Statement (Loc, + Declarations => + Decls, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => Dimen_Stmts))); + end; + end Append_Array_Traversal; + + ----------------------------------------- + -- Make_Stream_Procedure_Function_Name -- + ----------------------------------------- + + function Make_Stream_Procedure_Function_Name + (Loc : Source_Ptr; + Typ : Entity_Id; + Nam : Name_Id) return Entity_Id + is + begin + -- For tagged types, we use a canonical name so that it matches + -- the primitive spec. For all other cases, we use a serialized + -- name so that multiple generations of the same procedure do not + -- clash. + + if Is_Tagged_Type (Typ) then + return Make_Defining_Identifier (Loc, Nam); + else + return Make_Defining_Identifier (Loc, + Chars => + New_External_Name (Nam, ' ', Increment_Serial_Number)); + end if; + end Make_Stream_Procedure_Function_Name; + end Helpers; + + ----------------------------------- + -- Reserve_NamingContext_Methods -- + ----------------------------------- + + procedure Reserve_NamingContext_Methods is + Str_Resolve : constant String := "resolve"; + begin + Name_Buffer (1 .. Str_Resolve'Length) := Str_Resolve; + Name_Len := Str_Resolve'Length; + Overload_Counter_Table.Set (Name_Find, 1); + end Reserve_NamingContext_Methods; + + end PolyORB_Support; + + ------------------------------- + -- RACW_Type_Is_Asynchronous -- + ------------------------------- + + procedure RACW_Type_Is_Asynchronous (RACW_Type : Entity_Id) is + Asynchronous_Flag : constant Entity_Id := + Asynchronous_Flags_Table.Get (RACW_Type); + begin + Replace (Expression (Parent (Asynchronous_Flag)), + New_Occurrence_Of (Standard_True, Sloc (Asynchronous_Flag))); + end RACW_Type_Is_Asynchronous; + + ------------------------- + -- RCI_Package_Locator -- + ------------------------- + + function RCI_Package_Locator + (Loc : Source_Ptr; + Package_Spec : Node_Id) return Node_Id + is + Inst : Node_Id; + Pkg_Name : String_Id; + + begin + Get_Library_Unit_Name_String (Package_Spec); + Pkg_Name := String_From_Name_Buffer; + Inst := + Make_Package_Instantiation (Loc, + Defining_Unit_Name => + Make_Defining_Identifier (Loc, New_Internal_Name ('R')), + Name => + New_Occurrence_Of (RTE (RE_RCI_Locator), Loc), + Generic_Associations => New_List ( + Make_Generic_Association (Loc, + Selector_Name => + Make_Identifier (Loc, Name_RCI_Name), + Explicit_Generic_Actual_Parameter => + Make_String_Literal (Loc, + Strval => Pkg_Name)))); + + RCI_Locator_Table.Set (Defining_Unit_Name (Package_Spec), + Defining_Unit_Name (Inst)); + return Inst; + end RCI_Package_Locator; + + ----------------------------------------------- + -- Remote_Types_Tagged_Full_View_Encountered -- + ----------------------------------------------- + + procedure Remote_Types_Tagged_Full_View_Encountered + (Full_View : Entity_Id) + is + Stub_Elements : constant Stub_Structure := + Stubs_Table.Get (Full_View); + begin + if Stub_Elements /= Empty_Stub_Structure then + Add_RACW_Primitive_Declarations_And_Bodies + (Full_View, + Stub_Elements.RPC_Receiver_Decl, + List_Containing (Declaration_Node (Full_View))); + end if; + end Remote_Types_Tagged_Full_View_Encountered; + + ------------------- + -- Scope_Of_Spec -- + ------------------- + + function Scope_Of_Spec (Spec : Node_Id) return Entity_Id is + Unit_Name : Node_Id; + + begin + Unit_Name := Defining_Unit_Name (Spec); + while Nkind (Unit_Name) /= N_Defining_Identifier loop + Unit_Name := Defining_Identifier (Unit_Name); + end loop; + + return Unit_Name; + end Scope_Of_Spec; + + ---------------------- + -- Set_Renaming_TSS -- + ---------------------- + + procedure Set_Renaming_TSS + (Typ : Entity_Id; + Nam : Entity_Id; + TSS_Nam : TSS_Name_Type) + is + Loc : constant Source_Ptr := Sloc (Nam); + Spec : constant Node_Id := Parent (Nam); + + TSS_Node : constant Node_Id := + Make_Subprogram_Renaming_Declaration (Loc, + Specification => + Copy_Specification (Loc, + Spec => Spec, + New_Name => Make_TSS_Name (Typ, TSS_Nam)), + Name => New_Occurrence_Of (Nam, Loc)); + + Snam : constant Entity_Id := + Defining_Unit_Name (Specification (TSS_Node)); + + begin + if Nkind (Spec) = N_Function_Specification then + Set_Ekind (Snam, E_Function); + Set_Etype (Snam, Entity (Result_Definition (Spec))); + else + Set_Ekind (Snam, E_Procedure); + Set_Etype (Snam, Standard_Void_Type); + end if; + + Set_TSS (Typ, Snam); + end Set_Renaming_TSS; + + ---------------------------------------------- + -- Specific_Add_Obj_RPC_Receiver_Completion -- + ---------------------------------------------- + + procedure Specific_Add_Obj_RPC_Receiver_Completion + (Loc : Source_Ptr; + Decls : List_Id; + RPC_Receiver : Entity_Id; + Stub_Elements : Stub_Structure) is + begin + case Get_PCS_Name is + when Name_PolyORB_DSA => + PolyORB_Support.Add_Obj_RPC_Receiver_Completion (Loc, + Decls, RPC_Receiver, Stub_Elements); + when others => + GARLIC_Support.Add_Obj_RPC_Receiver_Completion (Loc, + Decls, RPC_Receiver, Stub_Elements); + end case; + end Specific_Add_Obj_RPC_Receiver_Completion; + + -------------------------------- + -- Specific_Add_RACW_Features -- + -------------------------------- + + procedure Specific_Add_RACW_Features + (RACW_Type : Entity_Id; + Desig : Entity_Id; + Stub_Type : Entity_Id; + Stub_Type_Access : Entity_Id; + RPC_Receiver_Decl : Node_Id; + Declarations : List_Id) is + begin + case Get_PCS_Name is + when Name_PolyORB_DSA => + PolyORB_Support.Add_RACW_Features ( + RACW_Type, + Desig, + Stub_Type, + Stub_Type_Access, + RPC_Receiver_Decl, + Declarations); + + when others => + GARLIC_Support.Add_RACW_Features ( + RACW_Type, + Stub_Type, + Stub_Type_Access, + RPC_Receiver_Decl, + Declarations); + end case; + end Specific_Add_RACW_Features; + + -------------------------------- + -- Specific_Add_RAST_Features -- + -------------------------------- + + procedure Specific_Add_RAST_Features + (Vis_Decl : Node_Id; + RAS_Type : Entity_Id) is + begin + case Get_PCS_Name is + when Name_PolyORB_DSA => + PolyORB_Support.Add_RAST_Features (Vis_Decl, RAS_Type); + when others => + GARLIC_Support.Add_RAST_Features (Vis_Decl, RAS_Type); + end case; + end Specific_Add_RAST_Features; + + -------------------------------------------------- + -- Specific_Add_Receiving_Stubs_To_Declarations -- + -------------------------------------------------- + + procedure Specific_Add_Receiving_Stubs_To_Declarations + (Pkg_Spec : Node_Id; + Decls : List_Id) + is + begin + case Get_PCS_Name is + when Name_PolyORB_DSA => + PolyORB_Support.Add_Receiving_Stubs_To_Declarations ( + Pkg_Spec, Decls); + when others => + GARLIC_Support.Add_Receiving_Stubs_To_Declarations ( + Pkg_Spec, Decls); + end case; + end Specific_Add_Receiving_Stubs_To_Declarations; + + ------------------------------------------ + -- Specific_Build_General_Calling_Stubs -- + ------------------------------------------ + + procedure Specific_Build_General_Calling_Stubs + (Decls : List_Id; + Statements : List_Id; + Target : RPC_Target; + Subprogram_Id : Node_Id; + Asynchronous : Node_Id := Empty; + Is_Known_Asynchronous : Boolean := False; + Is_Known_Non_Asynchronous : Boolean := False; + Is_Function : Boolean; + Spec : Node_Id; + Stub_Type : Entity_Id := Empty; + RACW_Type : Entity_Id := Empty; + Nod : Node_Id) + is + begin + case Get_PCS_Name is + when Name_PolyORB_DSA => + PolyORB_Support.Build_General_Calling_Stubs ( + Decls, + Statements, + Target.Object, + Subprogram_Id, + Asynchronous, + Is_Known_Asynchronous, + Is_Known_Non_Asynchronous, + Is_Function, + Spec, + Stub_Type, + RACW_Type, + Nod); + when others => + GARLIC_Support.Build_General_Calling_Stubs ( + Decls, + Statements, + Target.Partition, + Target.RPC_Receiver, + Subprogram_Id, + Asynchronous, + Is_Known_Asynchronous, + Is_Known_Non_Asynchronous, + Is_Function, + Spec, + Stub_Type, + RACW_Type, + Nod); + end case; + end Specific_Build_General_Calling_Stubs; + + -------------------------------------- + -- Specific_Build_RPC_Receiver_Body -- + -------------------------------------- + + procedure Specific_Build_RPC_Receiver_Body + (RPC_Receiver : Entity_Id; + Request : out Entity_Id; + Subp_Id : out Entity_Id; + Subp_Index : out Entity_Id; + Stmts : out List_Id; + Decl : out Node_Id) + is + begin + case Get_PCS_Name is + when Name_PolyORB_DSA => + PolyORB_Support.Build_RPC_Receiver_Body + (RPC_Receiver, + Request, + Subp_Id, + Subp_Index, + Stmts, + Decl); + when others => + GARLIC_Support.Build_RPC_Receiver_Body + (RPC_Receiver, + Request, + Subp_Id, + Subp_Index, + Stmts, + Decl); + end case; + end Specific_Build_RPC_Receiver_Body; + + -------------------------------- + -- Specific_Build_Stub_Target -- + -------------------------------- + + function Specific_Build_Stub_Target + (Loc : Source_Ptr; + Decls : List_Id; + RCI_Locator : Entity_Id; + Controlling_Parameter : Entity_Id) return RPC_Target + is + begin + case Get_PCS_Name is + when Name_PolyORB_DSA => + return PolyORB_Support.Build_Stub_Target (Loc, + Decls, RCI_Locator, Controlling_Parameter); + when others => + return GARLIC_Support.Build_Stub_Target (Loc, + Decls, RCI_Locator, Controlling_Parameter); + end case; + end Specific_Build_Stub_Target; + + ------------------------------ + -- Specific_Build_Stub_Type -- + ------------------------------ + + procedure Specific_Build_Stub_Type + (RACW_Type : Entity_Id; + Stub_Type : Entity_Id; + Stub_Type_Decl : out Node_Id; + RPC_Receiver_Decl : out Node_Id) + is + begin + case Get_PCS_Name is + when Name_PolyORB_DSA => + PolyORB_Support.Build_Stub_Type ( + RACW_Type, Stub_Type, + Stub_Type_Decl, RPC_Receiver_Decl); + when others => + GARLIC_Support.Build_Stub_Type ( + RACW_Type, Stub_Type, + Stub_Type_Decl, RPC_Receiver_Decl); + end case; + end Specific_Build_Stub_Type; + + function Specific_Build_Subprogram_Receiving_Stubs + (Vis_Decl : Node_Id; + Asynchronous : Boolean; + Dynamically_Asynchronous : Boolean := False; + Stub_Type : Entity_Id := Empty; + RACW_Type : Entity_Id := Empty; + Parent_Primitive : Entity_Id := Empty) return Node_Id + is + begin + case Get_PCS_Name is + when Name_PolyORB_DSA => + return PolyORB_Support.Build_Subprogram_Receiving_Stubs ( + Vis_Decl, + Asynchronous, + Dynamically_Asynchronous, + Stub_Type, + RACW_Type, + Parent_Primitive); + when others => + return GARLIC_Support.Build_Subprogram_Receiving_Stubs ( + Vis_Decl, + Asynchronous, + Dynamically_Asynchronous, + Stub_Type, + RACW_Type, + Parent_Primitive); + end case; + end Specific_Build_Subprogram_Receiving_Stubs; + + -------------------------- + -- Underlying_RACW_Type -- + -------------------------- + + function Underlying_RACW_Type (RAS_Typ : Entity_Id) return Entity_Id is + Record_Type : Entity_Id; + + begin + if Ekind (RAS_Typ) = E_Record_Type then + Record_Type := RAS_Typ; + else + pragma Assert (Present (Equivalent_Type (RAS_Typ))); + Record_Type := Equivalent_Type (RAS_Typ); + end if; + + return + Etype (Subtype_Indication ( + Component_Definition ( + First (Component_Items (Component_List ( + Type_Definition (Declaration_Node (Record_Type)))))))); + end Underlying_RACW_Type; + +end Exp_Dist; |