------------------------------------------------------------------------------
--                                                                          --
--                 GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS                 --
--                                                                          --
--                 S Y S T E M . T A S K _ P R I M I T I V E S              --
--                                                                          --
--                                  S p e c                                 --
--                                                                          --
--          Copyright (C) 1991-2011, Free Software Foundation, Inc.         --
--                                                                          --
-- GNARL is free software; you can  redistribute it  and/or modify it under --
-- terms of the  GNU General Public License as published  by the Free Soft- --
-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
--                                                                          --
-- As a special exception under Section 7 of GPL version 3, you are granted --
-- additional permissions described in the GCC Runtime Library Exception,   --
-- version 3.1, as published by the Free Software Foundation.               --
--                                                                          --
-- You should have received a copy of the GNU General Public License and    --
-- a copy of the GCC Runtime Library Exception along with this program;     --
-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
-- <http://www.gnu.org/licenses/>.                                          --
--                                                                          --
-- GNARL was developed by the GNARL team at Florida State University.       --
-- Extensive contributions were provided by Ada Core Technologies, Inc.     --
--                                                                          --
------------------------------------------------------------------------------

--  This is a no tasking version of this package

pragma Polling (Off);
--  Turn off polling, we do not want ATC polling to take place during tasking
--  operations. It causes infinite loops and other problems.

package System.Task_Primitives is
   pragma Preelaborate;

   type Lock is new Integer;

   type RTS_Lock is new Integer;

   type Suspension_Object is new Integer;

   type Task_Body_Access is access procedure;

   type Private_Data is record
      Thread : aliased Integer;
      CV     : aliased Integer;
      L      : aliased RTS_Lock;
   end record;

   subtype Task_Address is System.Address;
   --  In some versions of Task_Primitives, notably for VMS, Task_Address is
   --  the short version of address defined in System.Aux_DEC. To avoid
   --  dragging Aux_DEC into tasking packages a tasking specific subtype is
   --  defined here.

   Task_Address_Size : constant := Standard'Address_Size;
   --  The size of Task_Address

   Alternate_Stack_Size : constant := 0;
   --  No alternate signal stack is used on this platform

end System.Task_Primitives;
