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Diffstat (limited to 'gcc-4.9/gcc/ada/s-tpoaal.adb')
| -rw-r--r-- | gcc-4.9/gcc/ada/s-tpoaal.adb | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/ada/s-tpoaal.adb b/gcc-4.9/gcc/ada/s-tpoaal.adb new file mode 100644 index 000000000..1d25fb84b --- /dev/null +++ b/gcc-4.9/gcc/ada/s-tpoaal.adb @@ -0,0 +1,83 @@ +------------------------------------------------------------------------------ +-- -- +-- 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; |