1------------------------------------------------------------------------------
2--                                                                          --
3--                 GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS                 --
4--                                                                          --
5--                SYSTEM.TASK_PRIMITIVES.OPERATIONS.SPECIFIC                --
6--                                                                          --
7--                                 B o d y                                  --
8--                                                                          --
9--          Copyright (C) 1992-2019, Free Software Foundation, Inc.         --
10--                                                                          --
11-- GNARL is free software; you can  redistribute it  and/or modify it under --
12-- terms of the  GNU General Public License as published  by the Free Soft- --
13-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
14-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
15-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
16-- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
17--                                                                          --
18-- As a special exception under Section 7 of GPL version 3, you are granted --
19-- additional permissions described in the GCC Runtime Library Exception,   --
20-- version 3.1, as published by the Free Software Foundation.               --
21--                                                                          --
22-- You should have received a copy of the GNU General Public License and    --
23-- a copy of the GCC Runtime Library Exception along with this program;     --
24-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
25-- <http://www.gnu.org/licenses/>.                                          --
26--                                                                          --
27-- GNARL was developed by the GNARL team at Florida State University.       --
28-- Extensive contributions were provided by Ada Core Technologies, Inc.     --
29--                                                                          --
30------------------------------------------------------------------------------
31
32--  This is a POSIX-like version of this package
33
34separate (System.Task_Primitives.Operations)
35package body Specific is
36
37   ATCB_Key : aliased pthread_key_t;
38   --  Key used to find the Ada Task_Id associated with a thread
39
40   ----------------
41   -- Initialize --
42   ----------------
43
44   procedure Initialize (Environment_Task : Task_Id) is
45      pragma Warnings (Off, Environment_Task);
46      Result : Interfaces.C.int;
47   begin
48      Result := pthread_key_create (ATCB_Key'Access, null);
49      pragma Assert (Result = 0);
50   end Initialize;
51
52   -------------------
53   -- Is_Valid_Task --
54   -------------------
55
56   function Is_Valid_Task return Boolean is
57   begin
58      return  pthread_getspecific (ATCB_Key) /= System.Null_Address;
59   end Is_Valid_Task;
60
61   ---------
62   -- Set --
63   ---------
64
65   procedure Set (Self_Id : Task_Id) is
66      Result : Interfaces.C.int;
67   begin
68      Result := pthread_setspecific (ATCB_Key, To_Address (Self_Id));
69      pragma Assert (Result = 0);
70   end Set;
71
72   ----------
73   -- Self --
74   ----------
75
76   function Self return Task_Id is
77   begin
78      return To_Task_Id (pthread_getspecific (ATCB_Key));
79   end Self;
80
81end Specific;
82