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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [gcc/] [ada/] [s-tpoaal.adb] - 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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--             SYSTEM.TASK_PRIMITIVES.OPERATIONS.ATCB_ALLOCATION            --
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--                                                                          --
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--                                  B o d y                                 --
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--                                                                          --
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--             Copyright (C) 2011, 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 Ada.Unchecked_Deallocation;
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separate (System.Task_Primitives.Operations)
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package body ATCB_Allocation is
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   ---------------
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   -- Free_ATCB --
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   ---------------
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   procedure Free_ATCB (T : Task_Id) is
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      Tmp     : Task_Id := T;
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      Is_Self : constant Boolean := T = Self;
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      procedure Free is new
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        Ada.Unchecked_Deallocation (Ada_Task_Control_Block, Task_Id);
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   begin
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      if Is_Self then
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         declare
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            Local_ATCB : aliased Ada_Task_Control_Block (0);
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            --  Create a dummy ATCB and initialize it minimally so that "Free"
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            --  can still call Self and Defer/Undefer_Abort after Tmp is freed
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            --  by the underlying memory management library.
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         begin
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            Local_ATCB.Common.LL.Thread        := T.Common.LL.Thread;
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            Local_ATCB.Common.Current_Priority := T.Common.Current_Priority;
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            Specific.Set (Local_ATCB'Unchecked_Access);
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            Free (Tmp);
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            --  Note: it is assumed here that for all platforms, Specific.Set
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            --  deletes the task specific information if passed a null value.
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            Specific.Set (null);
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         end;
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      else
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         Free (Tmp);
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      end if;
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   end Free_ATCB;
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   --------------
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   -- New_ATCB --
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   --------------
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   function New_ATCB (Entry_Num : Task_Entry_Index) return Task_Id is
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   begin
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      return new Ada_Task_Control_Block (Entry_Num);
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   end New_ATCB;
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end ATCB_Allocation;

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