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Diffstat (limited to 'gcc-4.2.1/gcc/ada/s-tpoben.ads')
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diff --git a/gcc-4.2.1/gcc/ada/s-tpoben.ads b/gcc-4.2.1/gcc/ada/s-tpoben.ads deleted file mode 100644 index 53ae4bf50..000000000 --- a/gcc-4.2.1/gcc/ada/s-tpoben.ads +++ /dev/null @@ -1,200 +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 . -- --- E N T R I E 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 contains all the simple primitives related to --- Protected_Objects with entries (i.e init, lock, unlock). --- The handling of protected objects with no entries is done in --- System.Tasking.Protected_Objects, the complex routines for protected --- objects with entries in System.Tasking.Protected_Objects.Operations. --- The split between Entries and Operations is needed to break circular --- dependencies inside the run time. - --- Note: the compiler generates direct calls to this interface, via Rtsfind. --- Any changes to this interface may require corresponding compiler changes. - -with Ada.Finalization; --- used for Limited_Controlled - -with Unchecked_Conversion; - -package System.Tasking.Protected_Objects.Entries is - pragma Elaborate_Body; - - subtype Positive_Protected_Entry_Index is - Protected_Entry_Index range 1 .. Protected_Entry_Index'Last; - - type Find_Body_Index_Access is access - function - (O : System.Address; - E : Protected_Entry_Index) - return Protected_Entry_Index; - - type Protected_Entry_Body_Array is - array (Positive_Protected_Entry_Index range <>) of Entry_Body; - -- This is an array of the executable code for all entry bodies of - -- a protected type. - - type Protected_Entry_Body_Access is access all Protected_Entry_Body_Array; - - type Protected_Entry_Queue_Array is - array (Protected_Entry_Index range <>) of Entry_Queue; - - -- 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 is a simplified version of this type declared in - -- System.Tasking.PO_Simple that handle the simple case (no entries). - - type Protection_Entries (Num_Entries : Protected_Entry_Index) is new - Ada.Finalization.Limited_Controlled - with record - L : aliased Task_Primitives.Lock; - -- The underlying lock associated with a Protection_Entries. - -- Note that you should never (un)lock Object.L directly, but instead - -- use Lock_Entries/Unlock_Entries. - - Compiler_Info : System.Address; - -- Pointer to compiler-generated record representing protected object - - Call_In_Progress : Entry_Call_Link; - -- Pointer to the entry call being executed (if any) - - Ceiling : System.Any_Priority; - -- Ceiling priority associated with 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). - - Old_Base_Priority : System.Any_Priority; - -- Task's base priority when the protected operation was called - - Pending_Action : Boolean; - -- Flag indicating that priority has been dipped temporarily in order - -- to avoid violating the priority ceiling of the lock associated with - -- this protected object, in Lock_Server. The flag tells Unlock_Server - -- or Unlock_And_Update_Server to restore the old priority to - -- Old_Base_Priority. This is needed because of situations (bad - -- language design?) where one needs to lock a PO but to do so would - -- violate the priority ceiling. For example, this can happen when an - -- entry call has been requeued to a lower-priority object, and the - -- caller then tries to cancel the call while its own priority is - -- higher than the ceiling of the new PO. - - Finalized : Boolean := False; - -- Set to True by Finalize to make this routine idempotent - - Entry_Bodies : Protected_Entry_Body_Access; - -- Pointer to an array containing the executable code for all entry - -- bodies of a protected type. - - -- The following function maps the entry index in a call (which denotes - -- the queue to the proper entry) into the body of the entry. - - Find_Body_Index : Find_Body_Index_Access; - Entry_Queues : Protected_Entry_Queue_Array (1 .. Num_Entries); - end record; - - -- No default initial values for this type, since call records - -- will need to be re-initialized before every use. - - type Protection_Entries_Access is access all Protection_Entries'Class; - -- See comments in s-tassta.adb about the implicit call to Current_Master - -- generated by this declaration. - - function To_Address is - new Unchecked_Conversion (Protection_Entries_Access, System.Address); - function To_Protection is - new Unchecked_Conversion (System.Address, Protection_Entries_Access); - - function Has_Interrupt_Or_Attach_Handler - (Object : Protection_Entries_Access) return Boolean; - -- Returns True if an Interrupt_Handler or Attach_Handler pragma applies - -- to the protected object. That is to say this primitive returns False for - -- Protection, but is overriden to return True when interrupt handlers are - -- declared so the check required by C.3.1(11) can be implemented in - -- System.Tasking.Protected_Objects.Initialize_Protection. - - procedure Initialize_Protection_Entries - (Object : Protection_Entries_Access; - Ceiling_Priority : Integer; - Compiler_Info : System.Address; - Entry_Bodies : Protected_Entry_Body_Access; - Find_Body_Index : Find_Body_Index_Access); - -- 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_Entries (Object : Protection_Entries_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. Program_Error is raised in case of - -- ceiling violation. - - procedure Lock_Entries - (Object : Protection_Entries_Access; Ceiling_Violation : out Boolean); - -- Same as above, but return the ceiling violation status instead of - -- raising Program_Error. - - procedure Lock_Read_Only_Entries (Object : Protection_Entries_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_Entries (Object : Protection_Entries_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 - - procedure Finalize (Object : in out Protection_Entries); - -- Clean up a Protection object; in particular, finalize the associated - -- Lock object. - -end System.Tasking.Protected_Objects.Entries; |