gcc/ada/s-stchop-limit.ads

   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) 1999-2009, 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
  36 pragma 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
  40 pragma 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
  44 package 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.
  53 end System.Stack_Checking.Operations;