gcc/ada/s-tpopsp-posix.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                 GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS                 --
   4 --                                                                          --
   5 --    S Y S T E M . T A S K _ P R I M I T I V E S . O P E R A T I O N S .   --
   6 --                             S P E C I F I C                              --
   7 --                                                                          --
   8 --                                 B o d y                                  --
   9 --                                                                          --
  10 --            Copyright (C) 1992-2005, Free Software Fundation, Inc.        --
  11 --                                                                          --
  12 -- GNARL is free software; you can  redistribute it  and/or modify it under --
  13 -- terms of the  GNU General Public License as published  by the Free Soft- --
  14 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  15 -- sion. GNARL is distributed in the hope that it will be useful, but WITH- --
  16 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  17 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  18 -- for  more details.  You should have  received  a copy of the GNU General --
  19 -- Public License  distributed with GNARL; see file COPYING.  If not, write --
  20 -- to  the  Free Software Foundation,  51  Franklin  Street,  Fifth  Floor, --
  21 -- Boston, MA 02110-1301, USA.                                              --
  22 --                                                                          --
  23 -- As a special exception,  if other files  instantiate  generics from this --
  24 -- unit, or you link  this unit with other files  to produce an executable, --
  25 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  26 -- covered  by the  GNU  General  Public  License.  This exception does not --
  27 -- however invalidate  any other reasons why  the executable file  might be --
  28 -- covered by the  GNU Public License.                                      --
  29 --                                                                          --
  30 -- GNARL was developed by the GNARL team at Florida State University.       --
  31 -- Extensive contributions were provided by Ada Core Technologies, Inc.     --
  32 --                                                                          --
  33 ------------------------------------------------------------------------------
  34
  35 --  This is a POSIX-like version of this package.
  36
  37 separate (System.Task_Primitives.Operations)
  38 package body Specific is
  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
  81 end Specific;