gcc/ada/7stpopsp.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                GNU ADA RUN-TIME LIBRARY (GNARL) COMPONENTS               --
   4 --                                                                          --
   5 --                SYSTEM.TASK_PRIMITIVES.OPERATIONS.SPECIFIC                --
   6 --                                                                          --
   7 --                                  B o d y                                 --
   8 --                                                                          --
   9 --            Copyright (C) 1992-2002, Free Software Fundation, 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,  59 Temple Place - Suite 330,  Boston, --
  20 -- MA 02111-1307, 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
  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
  68    begin
  69       Result := pthread_setspecific (ATCB_Key, To_Address (Self_Id));
  70       pragma Assert (Result = 0);
  71    end Set;
  72
  73    ----------
  74    -- Self --
  75    ----------
  76
  77    function Self return Task_ID is
  78
  79    begin
  80       return To_Task_Id (pthread_getspecific (ATCB_Key));
  81    end Self;
  82
  83 end Specific;