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Diffstat (limited to 'gcc-4.4.3/gcc/ada/exp_ch7.ads')
| -rw-r--r-- | gcc-4.4.3/gcc/ada/exp_ch7.ads | 248 |
1 files changed, 0 insertions, 248 deletions
diff --git a/gcc-4.4.3/gcc/ada/exp_ch7.ads b/gcc-4.4.3/gcc/ada/exp_ch7.ads deleted file mode 100644 index b6c3ff26c..000000000 --- a/gcc-4.4.3/gcc/ada/exp_ch7.ads +++ /dev/null @@ -1,248 +0,0 @@ ------------------------------------------------------------------------------- --- -- --- GNAT COMPILER COMPONENTS -- --- -- --- E X P _ C H 7 -- --- -- --- S p e c -- --- -- --- Copyright (C) 1992-2008, 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 3, 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 COPYING3. If not, go to -- --- http://www.gnu.org/licenses for a complete copy of the license. -- --- -- --- GNAT was originally developed by the GNAT team at New York University. -- --- Extensive contributions were provided by Ada Core Technologies Inc. -- --- -- ------------------------------------------------------------------------------- - -with Namet; use Namet; -with Types; use Types; - -package Exp_Ch7 is - - procedure Expand_N_Package_Body (N : Node_Id); - procedure Expand_N_Package_Declaration (N : Node_Id); - - ----------------------------- - -- Finalization Management -- - ----------------------------- - - function In_Finalization_Root (E : Entity_Id) return Boolean; - -- True if current scope is in package System.Finalization_Root. Used - -- to avoid certain expansions that would involve circularity in the - -- Rtsfind mechanism. - - procedure Build_Final_List (N : Node_Id; Typ : Entity_Id); - -- Build finalization list for anonymous access types, and for access - -- types that are frozen before their designated types are known to - -- be controlled. - - procedure Build_Controlling_Procs (Typ : Entity_Id); - -- Typ is a record, and array type having controlled components. - -- Create the procedures Deep_Initialize, Deep_Adjust and Deep_Finalize - -- that take care of finalization management at run-time. - - procedure Build_Late_Proc (Typ : Entity_Id; Nam : Name_Id); - -- Build one controlling procedure when a late body overrides one of - -- the controlling operations. - - function Controller_Component (Typ : Entity_Id) return Entity_Id; - -- Returns the entity of the component whose name is 'Name_uController' - - function CW_Or_Has_Controlled_Part (T : Entity_Id) return Boolean; - -- True if T is a class-wide type, or if it has controlled parts ("part" - -- means T or any of its subcomponents). This is the same as - -- Needs_Finalization, except when pragma Restrictions (No_Finalization) - -- applies, in which case we know that class-wide objects do not contain - -- controlled parts. - - procedure Expand_Ctrl_Function_Call (N : Node_Id); - -- Expand a call to a function returning a controlled value. That is to - -- say attach the result of the call to the current finalization list, - -- which is the one of the transient scope created for such constructs. - - function Find_Final_List - (E : Entity_Id; - Ref : Node_Id := Empty) return Node_Id; - -- E is an entity representing a controlled object, a controlled type or a - -- scope. If Ref is not empty, it is a reference to a controlled record, - -- the closest Final list is in the controller component of the record - -- containing Ref otherwise this function returns a reference to the final - -- list attached to the closest dynamic scope (that can be E itself) - -- creating this final list if necessary. - - function Has_New_Controlled_Component (E : Entity_Id) return Boolean; - -- E is a type entity. Give the same result as Has_Controlled_Component - -- except for tagged extensions where the result is True only if the - -- latest extension contains a controlled component. - - function Make_Attach_Call - (Obj_Ref : Node_Id; - Flist_Ref : Node_Id; - With_Attach : Node_Id) return Node_Id; - -- Attach the referenced object to the referenced Final Chain 'Flist_Ref' - -- With_Attach is an expression of type Short_Short_Integer which can be - -- either '0' to signify no attachment, '1' for attachment to a simply - -- linked list or '2' for attachment to a doubly linked list. - - function Make_Init_Call - (Ref : Node_Id; - Typ : Entity_Id; - Flist_Ref : Node_Id; - With_Attach : Node_Id) return List_Id; - -- Ref is an expression (with no-side effect and is not required to have - -- been previously analyzed) that references the object to be initialized. - -- Typ is the expected type of Ref, which is either a controlled type - -- (Is_Controlled) or a type with controlled components (Has_Controlled). - -- With_Attach is an integer expression which is the attachment level, - -- see System.Finalization_Implementation.Attach_To_Final_List for the - -- documentation of Nb_Link. - -- - -- This function will generate the appropriate calls to make sure that the - -- objects referenced by Ref are initialized. The generated code is quite - -- different for an IS_Controlled type or a HAS_Controlled type, but this - -- is not the problem for the caller, the details are in the body. - - function Make_Adjust_Call - (Ref : Node_Id; - Typ : Entity_Id; - Flist_Ref : Node_Id; - With_Attach : Node_Id; - Allocator : Boolean := False) return List_Id; - -- Ref is an expression (with no-side effect and is not required to have - -- been previously analyzed) that references the object to be adjusted. Typ - -- is the expected type of Ref, which is a controlled type (Is_Controlled) - -- or a type with controlled components (Has_Controlled). With_Attach is an - -- integer expression giving the attachment level (see documentation of - -- Attach_To_Final_List.Nb_Link param documentation in s-finimp.ads. - -- Note: if Typ is Finalize_Storage_Only and the object is at library - -- level, then With_Attach will be ignored, and a zero link level will be - -- passed to Attach_To_Final_List. - -- - -- This function will generate the appropriate calls to make sure that the - -- objects referenced by Ref are adjusted. The generated code is quite - -- different depending on the fact the type IS_Controlled or HAS_Controlled - -- but this is not the problem of the caller, the details are in the body. - -- The objects must be attached when the adjust takes place after an - -- initialization expression but not when it takes place after a regular - -- assignment. - -- - -- If Allocator is True, we are adjusting a newly-created object. The - -- existing chaining pointers should not be left unchanged, because they - -- may come from a bit-for-bit copy of those from an initializing object. - -- So, when this flag is True, if the chaining pointers should otherwise - -- be left unset, instead they are reset to null. - - function Make_Final_Call - (Ref : Node_Id; - Typ : Entity_Id; - With_Detach : Node_Id) return List_Id; - -- Ref is an expression (with no-side effect and is not required to have - -- been previously analyzed) that references the object to be Finalized. - -- Typ is the expected type of Ref, which is a controlled type - -- (Is_Controlled) or a type with controlled components (Has_Controlled). - -- With_Detach is a boolean expression indicating whether to detach the - -- controlled object from whatever finalization list it is currently - -- attached to. - -- - -- This function will generate the appropriate calls to make sure that the - -- objects referenced by Ref are finalized. The generated code is quite - -- different depending on the fact the type IS_Controlled or HAS_Controlled - -- but this is not the problem of the caller, the details are in the body. - -- The objects must be detached when finalizing an unchecked deallocated - -- object but not when finalizing the target of an assignment, it is not - -- necessary either on scope exit. - - function Make_Handler_For_Ctrl_Operation (Loc : Source_Ptr) return Node_Id; - -- Generate an implicit exception handler with an 'others' choice, - -- converting any occurrence to a raise of Program_Error. - - function Needs_Finalization (T : Entity_Id) return Boolean; - -- True if T potentially needs finalization actions. True if T is - -- controlled, or has subcomponents. Also True if T is a class-wide type, - -- because some type extension might add controlled subcomponents, except - -- that if pragma Restrictions (No_Finalization) applies, this is False for - -- class-wide types. - - -------------------------------------------- - -- Task and Protected Object finalization -- - -------------------------------------------- - - function Cleanup_Array - (N : Node_Id; - Obj : Node_Id; - Typ : Entity_Id) return List_Id; - -- Generate loops to finalize any tasks or simple protected objects that - -- are subcomponents of an array. - - function Cleanup_Protected_Object - (N : Node_Id; - Ref : Node_Id) return Node_Id; - -- Generate code to finalize a protected object without entries - - function Cleanup_Record - (N : Node_Id; - Obj : Node_Id; - Typ : Entity_Id) return List_Id; - -- For each subcomponent of a record that contains tasks or simple - -- protected objects, generate the appropriate finalization call. - - function Cleanup_Task - (N : Node_Id; - Ref : Node_Id) return Node_Id; - -- Generate code to finalize a task - - function Has_Simple_Protected_Object (T : Entity_Id) return Boolean; - -- Check whether composite type contains a simple protected component - - function Is_Simple_Protected_Type (T : Entity_Id) return Boolean; - -- Check whether argument is a protected type without entries. Protected - -- types with entries are controlled, and their cleanup is handled by the - -- standard finalization machinery. For simple protected types we generate - -- inline code to release their locks. - - -------------------------------- - -- Transient Scope Management -- - -------------------------------- - - procedure Expand_Cleanup_Actions (N : Node_Id); - -- Expand the necessary stuff into a scope to enable finalization of local - -- objects and deallocation of transient data when exiting the scope. N is - -- a "scope node" that is to say one of the following: N_Block_Statement, - -- N_Subprogram_Body, N_Task_Body, N_Entry_Body. - - procedure Establish_Transient_Scope (N : Node_Id; Sec_Stack : Boolean); - -- Push a new transient scope on the scope stack. N is the node responsible - -- for the need of a transient scope. If Sec_Stack is True then the - -- secondary stack is brought in, otherwise it isn't. - - function Node_To_Be_Wrapped return Node_Id; - -- return the node to be wrapped if the current scope is transient - - procedure Store_Before_Actions_In_Scope (L : List_Id); - -- Append the list L of actions to the end of the before-actions store in - -- the top of the scope stack - - procedure Store_After_Actions_In_Scope (L : List_Id); - -- Append the list L of actions to the beginning of the after-actions store - -- in the top of the scope stack - - procedure Wrap_Transient_Declaration (N : Node_Id); - -- N is an object declaration. Expand the finalization calls after the - -- declaration and make the outer scope being the transient one. - - procedure Wrap_Transient_Expression (N : Node_Id); - -- N is a sub-expression. Expand a transient block around an expression - - procedure Wrap_Transient_Statement (N : Node_Id); - -- N is a statement. Expand a transient block around an instruction - -end Exp_Ch7; |