gcc/ada/s-tpopsp-posix.adb

   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) 1992-2008, 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 2,  or (at your option) any later ver- --
  14 -- sion. GNARL 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.  See the GNU General Public License --
  17 -- for  more details.  You should have  received  a copy of the GNU General --
  18 -- Public License  distributed with GNARL; see file COPYING.  If not, write --
  19 -- to  the  Free Software Foundation,  51  Franklin  Street,  Fifth  Floor, --
  20 -- Boston, MA 02110-1301, USA.                                              --
  21 --                                                                          --
  22 -- As a special exception,  if other files  instantiate  generics from this --
  23 -- unit, or you link  this unit with other files  to produce an executable, --
  24 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  25 -- covered  by the  GNU  General  Public  License.  This exception does not --
  26 -- however invalidate  any other reasons why  the executable file  might be --
  27 -- covered by the  GNU Public License.                                      --
  28 --                                                                          --
  29 -- GNARL was developed by the GNARL team at Florida State University.       --
  30 -- Extensive contributions were provided by Ada Core Technologies, Inc.     --
  31 --                                                                          --
  32 ------------------------------------------------------------------------------
  33
  34 --  This is a POSIX-like version of this package.
  35
  36 separate (System.Task_Primitives.Operations)
  37 package body Specific is
  38
  39    ----------------
  40    -- Initialize --
  41    ----------------
  42
  43    procedure Initialize (Environment_Task : Task_Id) is
  44       pragma Warnings (Off, Environment_Task);
  45       Result : Interfaces.C.int;
  46    begin
  47       Result := pthread_key_create (ATCB_Key'Access, null);
  48       pragma Assert (Result = 0);
  49    end Initialize;
  50
  51    -------------------
  52    -- Is_Valid_Task --
  53    -------------------
  54
  55    function Is_Valid_Task return Boolean is
  56    begin
  57       return  pthread_getspecific (ATCB_Key) /= System.Null_Address;
  58    end Is_Valid_Task;
  59
  60    ---------
  61    -- Set --
  62    ---------
  63
  64    procedure Set (Self_Id : Task_Id) is
  65       Result : Interfaces.C.int;
  66    begin
  67       Result := pthread_setspecific (ATCB_Key, To_Address (Self_Id));
  68       pragma Assert (Result = 0);
  69    end Set;
  70
  71    ----------
  72    -- Self --
  73    ----------
  74
  75    function Self return Task_Id is
  76    begin
  77       return To_Task_Id (pthread_getspecific (ATCB_Key));
  78    end Self;
  79
  80 end Specific;