gcc/ada/g-ctrl_c.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUN-TIME COMPONENTS                         --
   4 --                                                                          --
   5 --                          G N A T . C T R L _ C                           --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --                      Copyright (C) 2002-2010, AdaCore                    --
  10 --                                                                          --
  11 -- GNAT 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 -- GNAT was originally developed  by the GNAT team at  New York University. --
  28 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  29 --                                                                          --
  30 ------------------------------------------------------------------------------
  31
  32 --  This package may be used to intercept the interruption of a running
  33 --  program by the operator typing Control-C, without having to use an Ada
  34 --  interrupt handler protected object.
  35
  36 --  This package is currently implemented under Windows and Unix platforms
  37
  38 --  Note concerning Unix systems:
  39
  40 --  The behavior of this package when using tasking depends on the interaction
  41 --  between sigaction() and the thread library.
  42
  43 package GNAT.Ctrl_C is
  44
  45    type Handler_Type is access procedure;
  46    --  Any parameterless library level procedure can be used as a handler.
  47    --  Handler_Type should not propagate exceptions.
  48
  49    procedure Install_Handler (Handler : Handler_Type);
  50    --  Set up Handler to be called if the operator hits Ctrl-C, instead of the
  51    --  standard Control-C handler.
  52
  53    procedure Uninstall_Handler;
  54    --  Reinstall the standard Control-C handler.
  55    --  If Install_Handler has never been called, this procedure has no effect.
  56
  57 private
  58    pragma Import (C, Uninstall_Handler, "__gnat_uninstall_int_handler");
  59 end GNAT.Ctrl_C;