------------------------------------------------------------------------------
--                                                                          --
--                GNU ADA RUN-TIME LIBRARY (GNARL) COMPONENTS               --
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--             S Y S T E M . T A S K I N G . E N T R Y _ C A L L S          --
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--                             $Revision: 1.12 $                            --
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--            Copyright (C) 1991-1998, Florida State University             --
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------------------------------------------------------------------------------

package System.Tasking.Entry_Calls is

   procedure Wait_For_Completion
     (Self_ID : Task_ID;
      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_ID locked.

   procedure Wait_For_Completion_With_Timeout
     (Self_ID     : Task_ID;
      Entry_Call  : Entry_Call_Link;
      Wakeup_Time : Duration;
      Mode        : Delay_Modes);
   --  Same as Wait_For_Completion but it wait for a timeout with the value
   --  specified in Wakeup_Time as well.
   --  Self_ID will be locked by 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.

   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 cancelation 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_Prev_Priority : Rendezvous_Priority;
      Acceptor               : Task_ID);
   pragma Inline (Reset_Priority);
   --  Reset the priority of a task completing an accept statement to
   --  the value it had before the call.

   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;