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              --
6--                                                                          --
7--                                  S p e c                                 --
8--                                                                          --
9--          Copyright (C) 1991-2011, 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 3,  or (at your option) any later ver- --
14-- sion.  GNAT 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.                                     --
17--                                                                          --
18-- As a special exception under Section 7 of GPL version 3, you are granted --
19-- additional permissions described in the GCC Runtime Library Exception,   --
20-- version 3.1, as published by the Free Software Foundation.               --
21--                                                                          --
22-- You should have received a copy of the GNU General Public License and    --
23-- a copy of the GCC Runtime Library Exception along with this program;     --
24-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
25-- <http://www.gnu.org/licenses/>.                                          --
26--                                                                          --
27-- GNARL was developed by the GNARL team at Florida State University.       --
28-- Extensive contributions were provided by Ada Core Technologies, Inc.     --
29--                                                                          --
30------------------------------------------------------------------------------
31
32--  This is a no tasking version of this package
33
34pragma Polling (Off);
35--  Turn off polling, we do not want ATC polling to take place during tasking
36--  operations. It causes infinite loops and other problems.
37
38package System.Task_Primitives is
39   pragma Preelaborate;
40
41   type Lock is new Integer;
42
43   type RTS_Lock is new Integer;
44
45   type Suspension_Object is new Integer;
46
47   type Task_Body_Access is access procedure;
48
49   type Private_Data is record
50      Thread : aliased Integer;
51      CV     : aliased Integer;
52      L      : aliased RTS_Lock;
53   end record;
54
55   subtype Task_Address is System.Address;
56   --  In some versions of Task_Primitives, notably for VMS, Task_Address is
57   --  the short version of address defined in System.Aux_DEC. To avoid
58   --  dragging Aux_DEC into tasking packages a tasking specific subtype is
59   --  defined here.
60
61   Task_Address_Size : constant := Standard'Address_Size;
62   --  The size of Task_Address
63
64   Alternate_Stack_Size : constant := 0;
65   --  No alternate signal stack is used on this platform
66
67end System.Task_Primitives;
68