| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS -- |
| -- -- |
| -- SYSTEM.TASK_PRIMITIVES.OPERATIONS.ATCB_ALLOCATION -- |
| -- -- |
| -- B o d y -- |
| -- -- |
| -- Copyright (C) 2011-2021, 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; |
