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