diff options
Diffstat (limited to 'gcc-4.2.1/gcc/ada/s-taprob.ads')
| -rw-r--r-- | gcc-4.2.1/gcc/ada/s-taprob.ads | 229 |
1 files changed, 0 insertions, 229 deletions
diff --git a/gcc-4.2.1/gcc/ada/s-taprob.ads b/gcc-4.2.1/gcc/ada/s-taprob.ads deleted file mode 100644 index 3ff908258..000000000 --- a/gcc-4.2.1/gcc/ada/s-taprob.ads +++ /dev/null @@ -1,229 +0,0 @@ ------------------------------------------------------------------------------- --- -- --- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS -- --- -- --- S Y S T E M . T A S K I N G . P R O T E C T E D _ O B J E C T S -- --- -- --- S p e c -- --- -- --- Copyright (C) 1992-2005, Free Software Foundation, Inc. -- --- -- --- GNARL 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. GNARL 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 GNARL; see file COPYING. If not, write -- --- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, -- --- Boston, MA 02110-1301, USA. -- --- -- --- As a special exception, if other files instantiate generics from this -- --- unit, or you link this unit with other files to produce an executable, -- --- this unit does not by itself cause the resulting executable to be -- --- covered by the GNU General Public License. This exception does not -- --- however invalidate any other reasons why the executable file might be -- --- covered by the GNU Public License. -- --- -- --- GNARL was developed by the GNARL team at Florida State University. -- --- Extensive contributions were provided by Ada Core Technologies, Inc. -- --- -- ------------------------------------------------------------------------------- - --- This package provides necessary definitions to handle simple (i.e without --- entries) protected objects. - --- All the routines that handle protected objects with entries have been moved --- to two children: Entries and Operations. Note that Entries only contains --- the type declaration and the OO primitives. This is needed to avoid --- circular dependency. - --- This package is part of the high level tasking interface used by the --- compiler to expand Ada 95 tasking constructs into simpler run time calls --- (aka GNARLI, GNU Ada Run-time Library Interface) - --- Note: the compiler generates direct calls to this interface, via Rtsfind. --- Any changes to this interface may require corresponding compiler changes --- in exp_ch9.adb and possibly exp_ch7.adb - -package System.Tasking.Protected_Objects is - pragma Elaborate_Body; - - --------------------------------- - -- Compiler Interface (GNARLI) -- - --------------------------------- - - -- The compiler will expand in the GNAT tree the following construct: - - -- protected PO is - -- procedure P; - -- private - -- open : boolean := false; - -- end PO; - - -- protected body PO is - -- procedure P is - -- ...variable declarations... - -- begin - -- ...B... - -- end P; - -- end PO; - - -- as follows: - - -- protected type poT is - -- procedure p; - -- private - -- open : boolean := false; - -- end poT; - -- type poTV is limited record - -- open : boolean := false; - -- _object : aliased protection; - -- end record; - -- procedure poPT__pN (_object : in out poTV); - -- procedure poPT__pP (_object : in out poTV); - -- freeze poTV [ - -- procedure poTVI (_init : in out poTV) is - -- begin - -- _init.open := false; - -- object-init-proc (_init._object); - -- initialize_protection (_init._object'unchecked_access, - -- unspecified_priority); - -- return; - -- end _init_proc; - -- ] - -- po : poT; - -- poTVI (poTV!(po)); - - -- procedure poPT__pN (_object : in out poTV) is - -- poR : protection renames _object._object; - -- openP : boolean renames _object.open; - -- ...variable declarations... - -- begin - -- ...B... - -- return; - -- end poPT__pN; - - -- procedure poPT__pP (_object : in out poTV) is - -- procedure _clean is - -- begin - -- unlock (_object._object'unchecked_access); - -- return; - -- end _clean; - -- begin - -- lock (_object._object'unchecked_access); - -- B2b : begin - -- poPT__pN (_object); - -- at end - -- _clean; - -- end B2b; - -- return; - -- end poPT__pP; - - Null_Protected_Entry : constant := Null_Entry; - - Max_Protected_Entry : constant := Max_Entry; - - type Protected_Entry_Index is new Entry_Index - range Null_Protected_Entry .. Max_Protected_Entry; - - type Barrier_Function_Pointer is access - function - (O : System.Address; - E : Protected_Entry_Index) - return Boolean; - -- Pointer to a function which evaluates the barrier of a protected - -- entry body. O is a pointer to the compiler-generated record - -- representing the protected object, and E is the index of the - -- entry serviced by the body. - - type Entry_Action_Pointer is access - procedure - (O : System.Address; - P : System.Address; - E : Protected_Entry_Index); - -- Pointer to a procedure which executes the sequence of statements - -- of a protected entry body. O is a pointer to the compiler-generated - -- record representing the protected object, P is a pointer to the - -- record of entry parameters, and E is the index of the - -- entry serviced by the body. - - type Entry_Body is record - Barrier : Barrier_Function_Pointer; - Action : Entry_Action_Pointer; - end record; - -- The compiler-generated code passes objects of this type to the GNARL - -- to allow it to access the executable code of an entry body. - - type Entry_Body_Access is access all Entry_Body; - - type Protection is limited private; - -- This type contains the GNARL state of a protected object. The - -- application-defined portion of the state (i.e. private objects) - -- is maintained by the compiler-generated code. - -- Note that there are now 2 Protection types. One for the simple - -- case (no entries) and one for the general case that needs the whole - -- Finalization mechanism. - -- This split helps in the case of restricted run time where we want to - -- minimize the size of the code. - - type Protection_Access is access all Protection; - - Null_PO : constant Protection_Access := null; - - procedure Initialize_Protection - (Object : Protection_Access; - Ceiling_Priority : Integer); - -- Initialize the Object parameter so that it can be used by the runtime - -- to keep track of the runtime state of a protected object. - - procedure Lock (Object : Protection_Access); - -- Lock a protected object for write access. Upon return, the caller - -- owns the lock to this object, and no other call to Lock or - -- Lock_Read_Only with the same argument will return until the - -- corresponding call to Unlock has been made by the caller. - - procedure Lock_Read_Only (Object : Protection_Access); - -- Lock a protected object for read access. Upon return, the caller - -- owns the lock for read access, and no other calls to Lock with the - -- same argument will return until the corresponding call to Unlock - -- has been made by the caller. Other calls to Lock_Read_Only may (but - -- need not) return before the call to Unlock, and the corresponding - -- callers will also own the lock for read access. - -- - -- Note: we are not currently using this interface, it is provided - -- for possible future use. At the current time, everyone uses Lock - -- for both read and write locks. - - procedure Unlock (Object : Protection_Access); - -- Relinquish ownership of the lock for the object represented by - -- the Object parameter. If this ownership was for write access, or - -- if it was for read access where there are no other read access - -- locks outstanding, one (or more, in the case of Lock_Read_Only) - -- of the tasks waiting on this lock (if any) will be given the - -- lock and allowed to return from the Lock or Lock_Read_Only call. - -private - type Protection is record - L : aliased Task_Primitives.Lock; - -- Lock used to ensure mutual exclusive access to the protected object - - Ceiling : System.Any_Priority; - -- Ceiling priority associated to the protected object - - Owner : Task_Id; - -- This field contains the protected object's owner. Null_Task - -- indicates that the protected object is not currently being used. - -- This information is used for detecting the type of potentially - -- blocking operations described in the ARM 9.5.1, par. 15 (external - -- calls on a protected subprogram with the same target object as that - -- of the protected action). - end record; - - procedure Finalize_Protection (Object : in out Protection); - -- Clean up a Protection object (in particular, finalize the associated - -- Lock object). The compiler generates calls automatically to this - -- procedure - -end System.Tasking.Protected_Objects; |