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Diffstat (limited to 'gcc-4.4.0/gcc/ada/s-tasini.ads')
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diff --git a/gcc-4.4.0/gcc/ada/s-tasini.ads b/gcc-4.4.0/gcc/ada/s-tasini.ads deleted file mode 100644 index 0b2f45092..000000000 --- a/gcc-4.4.0/gcc/ada/s-tasini.ads +++ /dev/null @@ -1,190 +0,0 @@ ------------------------------------------------------------------------------- --- -- --- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS -- --- -- --- S Y S T E M . T A S K I N G . I N I T I A L I Z A T I O N -- --- -- --- S p e c -- --- -- --- Copyright (C) 1992-2009, 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 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. -- --- -- --- As a special exception under Section 7 of GPL version 3, you are granted -- --- additional permissions described in the GCC Runtime Library Exception, -- --- version 3.1, as published by the Free Software Foundation. -- --- -- --- You should have received a copy of the GNU General Public License and -- --- a copy of the GCC Runtime Library Exception along with this program; -- --- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- --- <http://www.gnu.org/licenses/>. -- --- -- --- GNARL was developed by the GNARL team at Florida State University. -- --- Extensive contributions were provided by Ada Core Technologies, Inc. -- --- -- ------------------------------------------------------------------------------- - --- This package provides overall initialization of the tasking portion of the --- RTS. This package must be elaborated before any tasking features are used. - -package System.Tasking.Initialization is - - procedure Remove_From_All_Tasks_List (T : Task_Id); - -- Remove T from All_Tasks_List. Call this function with RTS_Lock taken - - --------------------------------- - -- Tasking-Specific Soft Links -- - --------------------------------- - - -- These permit us to leave out certain portions of the tasking - -- run-time system if they are not used. They are only used internally - -- by the tasking run-time system. - - -- So far, the only example is support for Ada.Task_Attributes - - type Proc_T is access procedure (T : Task_Id); - - procedure Finalize_Attributes (T : Task_Id); - procedure Initialize_Attributes (T : Task_Id); - - Finalize_Attributes_Link : Proc_T := Finalize_Attributes'Access; - -- should be called with abort deferred and T.L write-locked - - Initialize_Attributes_Link : Proc_T := Initialize_Attributes'Access; - -- should be called with abort deferred, but holding no locks - - ------------------------- - -- Abort Defer/Undefer -- - ------------------------- - - -- Defer_Abort defers the affects of low-level abort and priority change - -- in the calling task until a matching Undefer_Abort call is executed. - - -- Undefer_Abort DOES MORE than just undo the effects of one call to - -- Defer_Abort. It is the universal "polling point" for deferred - -- processing, including the following: - - -- 1) base priority changes - - -- 2) abort/ATC - - -- Abort deferral MAY be nested (Self_ID.Deferral_Level is a count), but - -- to avoid waste and undetected errors, it generally SHOULD NOT be - -- nested. The symptom of over-deferring abort is that an exception may - -- fail to be raised, or an abort may fail to take place. - - -- Therefore, there are two sets of the inlineable defer/undefer routines, - -- which are the ones to be used inside GNARL. One set allows nesting. The - -- other does not. People who maintain the GNARL should try to avoid using - -- the nested versions, or at least look very critically at the places - -- where they are used. - - -- In general, any GNARL call that is potentially blocking, or whose - -- semantics require that it sometimes raise an exception, or that is - -- required to be an abort completion point, must be made with abort - -- Deferral_Level = 1. - - -- In general, non-blocking GNARL calls, which may be made from inside a - -- protected action, are likely to need to allow nested abort deferral. - - -- With some critical exceptions (which are supposed to be documented), - -- internal calls to the tasking runtime system assume abort is already - -- deferred, and do not modify the deferral level. - - -- There is also a set of non-inlineable defer/undefer routines, for direct - -- call from the compiler. These are not inlineable because they may need - -- to be called via pointers ("soft links"). For the sake of efficiency, - -- the version with Self_ID as parameter should used wherever possible. - -- These are all nestable. - - -- Non-nestable inline versions - - procedure Defer_Abort (Self_ID : Task_Id); - pragma Inline (Defer_Abort); - - procedure Undefer_Abort (Self_ID : Task_Id); - pragma Inline (Undefer_Abort); - - -- Nestable inline versions - - procedure Defer_Abort_Nestable (Self_ID : Task_Id); - pragma Inline (Defer_Abort_Nestable); - - procedure Undefer_Abort_Nestable (Self_ID : Task_Id); - pragma Inline (Undefer_Abort_Nestable); - - procedure Do_Pending_Action (Self_ID : Task_Id); - -- Only call with no locks, and when Self_ID.Pending_Action = True Perform - -- necessary pending actions (e.g. abort, priority change). This procedure - -- is usually called when needed as a result of calling Undefer_Abort, - -- although in the case of e.g. No_Abort restriction, it can be necessary - -- to force execution of pending actions. - - function Check_Abort_Status return Integer; - -- Returns Boolean'Pos (True) iff abort signal should raise - -- Standard.Abort_Signal. Only used by IRIX currently. - - -------------------------- - -- Change Base Priority -- - -------------------------- - - procedure Change_Base_Priority (T : Task_Id); - -- Change the base priority of T. Has to be called with the affected - -- task's ATCB write-locked. May temporarily release the lock. - - ---------------------- - -- Task Lock/Unlock -- - ---------------------- - - procedure Task_Lock (Self_ID : Task_Id); - pragma Inline (Task_Lock); - - procedure Task_Unlock (Self_ID : Task_Id); - pragma Inline (Task_Unlock); - -- These are versions of Lock_Task and Unlock_Task created for use - -- within the GNARL. - - procedure Final_Task_Unlock (Self_ID : Task_Id); - -- This version is only for use in Terminate_Task, when the task is - -- relinquishing further rights to its own ATCB. There is a very - -- interesting potential race condition there, where the old task may run - -- concurrently with a new task that is allocated the old tasks (now - -- reused) ATCB. The critical thing here is to not make any reference to - -- the ATCB after the lock is released. See also comments on - -- Terminate_Task and Unlock. - - procedure Wakeup_Entry_Caller - (Self_ID : Task_Id; - Entry_Call : Entry_Call_Link; - New_State : Entry_Call_State); - pragma Inline (Wakeup_Entry_Caller); - -- This is called at the end of service of an entry call, to abort the - -- caller if he is in an abortable part, and to wake up the caller if he - -- is on Entry_Caller_Sleep. Call it holding the lock of Entry_Call.Self. - -- - -- Timed_Call or Simple_Call: - -- The caller is waiting on Entry_Caller_Sleep, in Wait_For_Completion, - -- or Wait_For_Completion_With_Timeout. - -- - -- Conditional_Call: - -- The caller might be in Wait_For_Completion, - -- waiting for a rendezvous (possibly requeued without abort) to - -- complete. - -- - -- Asynchronous_Call: - -- The caller may be executing in the abortable part an async. select, - -- or on a time delay, if Entry_Call.State >= Was_Abortable. - - procedure Locked_Abort_To_Level - (Self_ID : Task_Id; - T : Task_Id; - L : ATC_Level); - pragma Inline (Locked_Abort_To_Level); - -- Abort a task to a specified ATC level. Call this only with T locked - -end System.Tasking.Initialization; |