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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [gcc/] [ada/] [s-tasque.ads] - Blame information for rev 706

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1 706 jeremybenn
------------------------------------------------------------------------------
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--                                                                          --
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--                 GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS                 --
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--                                                                          --
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--                 S Y S T E M . T A S K I N G . Q U E U I N G              --
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--                                                                          --
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--                                  S p e c                                 --
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--                                                                          --
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--         Copyright (C) 1992-2009, Free Software Foundation, Inc.          --
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--                                                                          --
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-- GNARL is free software; you can  redistribute it  and/or modify it under --
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-- terms of the  GNU General Public License as published  by the Free Soft- --
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-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
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-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
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--                                                                          --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception,   --
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-- version 3.1, as published by the Free Software Foundation.               --
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--                                                                          --
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-- You should have received a copy of the GNU General Public License and    --
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-- a copy of the GCC Runtime Library Exception along with this program;     --
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-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
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-- <http://www.gnu.org/licenses/>.                                          --
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--                                                                          --
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-- GNARL was developed by the GNARL team at Florida State University.       --
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-- Extensive contributions were provided by Ada Core Technologies, Inc.     --
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--                                                                          --
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------------------------------------------------------------------------------
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with System.Tasking.Protected_Objects.Entries;
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package System.Tasking.Queuing is
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   package POE renames System.Tasking.Protected_Objects.Entries;
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   procedure Broadcast_Program_Error
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     (Self_ID      : Task_Id;
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      Object       : POE.Protection_Entries_Access;
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      Pending_Call : Entry_Call_Link;
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      RTS_Locked   : Boolean := False);
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   --  Raise Program_Error in all tasks calling the protected entries of Object
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   --  The exception will not be raised immediately for the calling task; it
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   --  will be deferred until it calls Check_Exception.
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   --  RTS_Locked indicates whether the global RTS lock is taken (only
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   --  relevant if Single_Lock is True).
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   procedure Enqueue (E : in out Entry_Queue; Call : Entry_Call_Link);
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   --  Enqueue Call at the end of entry_queue E
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   procedure Dequeue (E : in out Entry_Queue; Call : Entry_Call_Link);
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   --  Dequeue Call from entry_queue E
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   function Head (E : Entry_Queue) return Entry_Call_Link;
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   pragma Inline (Head);
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   --  Return the head of entry_queue E
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   procedure Dequeue_Head
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     (E    : in out Entry_Queue;
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      Call : out Entry_Call_Link);
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   --  Remove and return the head of entry_queue E
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   function Onqueue (Call : Entry_Call_Link) return Boolean;
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   pragma Inline (Onqueue);
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   --  Return True if Call is on any entry_queue at all
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   function Count_Waiting (E : Entry_Queue) return Natural;
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   --  Return number of calls on the waiting queue of E
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   procedure Select_Task_Entry_Call
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     (Acceptor         : Task_Id;
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      Open_Accepts     : Accept_List_Access;
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      Call             : out Entry_Call_Link;
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      Selection        : out Select_Index;
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      Open_Alternative : out Boolean);
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   --  Select an entry for rendezvous.  On exit:
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   --    Call will contain a pointer to the entry call record selected;
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   --    Selection will contain the index of the alternative selected
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   --    Open_Alternative will be True if there were any open alternatives
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   procedure Select_Protected_Entry_Call
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     (Self_ID : Task_Id;
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      Object  : POE.Protection_Entries_Access;
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      Call    : out Entry_Call_Link);
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   --  Select an entry of a protected object
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   procedure Enqueue_Call (Entry_Call : Entry_Call_Link);
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   procedure Dequeue_Call (Entry_Call : Entry_Call_Link);
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   --  Enqueue (dequeue) the call to (from) whatever server they are
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   --  calling, whether a task or a protected object.
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   procedure Requeue_Call_With_New_Prio
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     (Entry_Call : Entry_Call_Link; Prio : System.Any_Priority);
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   --  Change Priority of the call and re insert to the queue when priority
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   --  queueing is in effect. When FIFO is enforced, this routine
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   --  should not have any effect.
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end System.Tasking.Queuing;

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