1------------------------------------------------------------------------------
2--                                                                          --
3--                 GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS                 --
4--                                                                          --
5--     S Y S T E M . S T A C K _ C H E C K I N G . O P E R A T I O N S      --
6--                                                                          --
7--                                  S p e c                                 --
8--                                                                          --
9--          Copyright (C) 1999-2018, 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 version of this package is for implementations which use
33--  the stack limit approach (the limit of the stack is stored into a per
34--  thread variable).
35
36pragma Restrictions (No_Elaboration_Code);
37--  We want to guarantee the absence of elaboration code because the binder
38--  does not handle references to this package.
39
40pragma Polling (Off);
41--  Turn off polling, we do not want polling to take place during stack
42--  checking operations. It causes infinite loops and other problems.
43
44package System.Stack_Checking.Operations is
45   pragma Preelaborate;
46
47   procedure Initialize_Stack_Limit;
48   pragma Export (C, Initialize_Stack_Limit,
49                    "__gnat_initialize_stack_limit");
50   --  This procedure is called before elaboration to setup the stack limit
51   --  for the environment task and to register the hook to be called at
52   --  task creation.
53end System.Stack_Checking.Operations;
54