gcc/ada/s-tpopsp-vxworks.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) 1992-2007, 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 VxWorks version of this package where foreign threads are
  35 --  recognized.
  36
  37 separate (System.Task_Primitives.Operations)
  38 package body Specific is
  39
  40    ATCB_Key : aliased System.Address := System.Null_Address;
  41    --  Key used to find the Ada Task_Id associated with a thread
  42
  43    ATCB_Key_Addr : System.Address := ATCB_Key'Address;
  44    pragma Export (Ada, ATCB_Key_Addr, "__gnat_ATCB_key_addr");
  45    --  Exported to support the temporary AE653 task registration
  46    --  implementation. This mechanism is used to minimize impact on other
  47    --  targets.
  48
  49    ------------
  50    -- Delete --
  51    ------------
  52
  53    procedure Delete is
  54       Result : STATUS;
  55    begin
  56       Result := taskVarDelete (taskIdSelf, ATCB_Key'Access);
  57       pragma Assert (Result /= ERROR);
  58    end Delete;
  59
  60    ----------------
  61    -- Initialize --
  62    ----------------
  63
  64    procedure Initialize is
  65    begin
  66       null;
  67    end Initialize;
  68
  69    -------------------
  70    -- Is_Valid_Task --
  71    -------------------
  72
  73    function Is_Valid_Task return Boolean is
  74    begin
  75       return taskVarGet (taskIdSelf, ATCB_Key'Access) /= ERROR;
  76    end Is_Valid_Task;
  77
  78    ---------
  79    -- Set --
  80    ---------
  81
  82    procedure Set (Self_Id : Task_Id) is
  83       Result : STATUS;
  84
  85    begin
  86       if taskVarGet (0, ATCB_Key'Access) = ERROR then
  87          Result := taskVarAdd (0, ATCB_Key'Access);
  88          pragma Assert (Result = OK);
  89       end if;
  90
  91       ATCB_Key := To_Address (Self_Id);
  92    end Set;
  93
  94    ----------
  95    -- Self --
  96    ----------
  97
  98    function Self return Task_Id is
  99    begin
 100       return To_Task_Id (ATCB_Key);
 101    end Self;
 102
 103 end Specific;