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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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