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) 1999-2007, 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 version of this package is for implementations which use
  35 --  the stack limit approach (the limit of the stack is stored into a per
  36 --  thread variable).
  37
  38 pragma Restrictions (No_Elaboration_Code);
  39 --  We want to guarantee the absence of elaboration code because the binder
  40 --  does not handle references to this package.
  41
  42 pragma Polling (Off);
  43 --  Turn off polling, we do not want polling to take place during stack
  44 --  checking operations. It causes infinite loops and other problems.
  45
  46 package System.Stack_Checking.Operations is
  47    pragma Preelaborate;
  48
  49    procedure Initialize_Stack_Limit;
  50    pragma Export (C, Initialize_Stack_Limit,
  51                     "__gnat_initialize_stack_limit");
  52    --  This procedure is called before elaboration to setup the stack limit
  53    --  for the environment task and to register the hook to be called at
  54    --  task creation.
  55 end System.Stack_Checking.Operations;