File : 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 -- --
19 -- --
20 -- --
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;