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1// SignalHandler.hh for Fluxbox Window Manager
2// Copyright (c) 2002 Henrik Kinnunen (fluxgen@linuxmail.org)
3//
4// Permission is hereby granted, free of charge, to any person obtaining a
5// copy of this software and associated documentation files (the "Software"),
6// to deal in the Software without restriction, including without limitation
7// the rights to use, copy, modify, merge, publish, distribute, sublicense,
8// and/or sell copies of the Software, and to permit persons to whom the
9// Software is furnished to do so, subject to the following conditions:
10//
11// The above copyright notice and this permission notice shall be included in
12// all copies or substantial portions of the Software.
13//
14// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
19// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
20// DEALINGS IN THE SOFTWARE.
21
22// $Id: SignalHandler.hh,v 1.1 2002/08/13 23:57:04 fluxgen Exp $
23
24#ifndef FBTK_SIGNALHANDLER_HH
25#define FBTK_SIGNALHANDLER_HH
26
27#include <signal.h>
28
29namespace FbTk {
30
31/**
32 Handles system signals, singleton.
33*/
34class SignalHandler {
35public:
36 /**
37 Inherit this class to handle signals.
38 */
39 class EventHandler {
40 public:
41 virtual void handleSignal(int signum) = 0;
42 };
43
44 /// get singleton object
45 static SignalHandler *instance();
46 /**
47 Register an event handler
48 @return true on success else false
49 @param signum signal number
50 @param eh event handler
51 @param oldhandler_ret return handler to old sighandler
52 */
53 bool registerHandler(int signum, EventHandler *eh, EventHandler **oldhandler_ret = 0);
54 /**
55 removes the signum handler
56 @param signum signal number
57 */
58 void removeHandler(int signum);
59private:
60 SignalHandler();
61
62 static void handleSignal(int signum);
63
64 static EventHandler *s_signal_handler[NSIG]; ///< NSIG defined in signal.h
65};
66
67}; // end namespace FbTk
68
69#endif // FBTK_SIGNALHANDLER_HH