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+------------------------------------------------------------------------------
+-- --
+-- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
+-- --
+-- S Y S T E M . T A S K I N G . E N T R Y _ C A L L S --
+-- --
+-- 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 internal RTS calls implementing operations
+-- that apply to general entry calls, that is, calls to either
+-- protected or task entries.
+
+-- These declarations are not part of the GNARL Interface
+
+package System.Tasking.Entry_Calls is
+
+ procedure Wait_For_Completion (Entry_Call : Entry_Call_Link);
+ -- This procedure suspends the calling task until the specified entry
+ -- call has either been completed or cancelled. It performs other
+ -- operations required of suspended tasks, such as performing
+ -- dynamic priority changes. On exit, the call will not be queued.
+ -- This waits for calls on task or protected entries.
+ -- Abortion must be deferred when calling this procedure.
+ -- Call this only when holding Self (= Entry_Call.Self) or global RTS lock.
+
+ procedure Wait_For_Completion_With_Timeout
+ (Entry_Call : Entry_Call_Link;
+ Wakeup_Time : Duration;
+ Mode : Delay_Modes;
+ Yielded : out Boolean);
+ -- Same as Wait_For_Completion but wait for a timeout with the value
+ -- specified in Wakeup_Time as well.
+ -- On return, Yielded indicates whether the wait has performed a yield.
+ -- Check_Exception must be called after calling this procedure.
+
+ procedure Wait_Until_Abortable
+ (Self_ID : Task_Id;
+ Call : Entry_Call_Link);
+ -- This procedure suspends the calling task until the specified entry
+ -- call is queued abortably or completes.
+ -- Abortion must be deferred when calling this procedure, and the global
+ -- RTS lock taken when Single_Lock.
+
+ procedure Try_To_Cancel_Entry_Call (Succeeded : out Boolean);
+ pragma Inline (Try_To_Cancel_Entry_Call);
+ -- Try to cancel async. entry call.
+ -- Effect includes Abort_To_Level and Wait_For_Completion.
+ -- Cancelled = True iff the cancellation was successful, i.e.,
+ -- the call was not Done before this call.
+ -- On return, the call is off-queue and the ATC level is reduced by one.
+
+ procedure Reset_Priority
+ (Acceptor : Task_Id;
+ Acceptor_Prev_Priority : Rendezvous_Priority);
+ pragma Inline (Reset_Priority);
+ -- Reset the priority of a task completing an accept statement to
+ -- the value it had before the call.
+ -- Acceptor should always be equal to Self.
+
+ procedure Check_Exception
+ (Self_ID : Task_Id;
+ Entry_Call : Entry_Call_Link);
+ pragma Inline (Check_Exception);
+ -- Raise any pending exception from the Entry_Call.
+ -- This should be called at the end of every compiler interface procedure
+ -- that implements an entry call.
+ -- In principle, the caller should not be abort-deferred (unless the
+ -- application program violates the Ada language rules by doing entry calls
+ -- from within protected operations -- an erroneous practice apparently
+ -- followed with success by some adventurous GNAT users).
+ -- Absolutely, the caller should not be holding any locks, or there
+ -- will be deadlock.
+
+end System.Tasking.Entry_Calls;