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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 1.3 2002/08/17 22:15:04 fluxgen Exp $
23
24#ifndef FBTK_SIGNALHANDLER_HH
25#define FBTK_SIGNALHANDLER_HH
26
27#include "EventHandler.hh"
28
29#include <signal.h>
30
31namespace FbTk {
32
33struct SignalEvent {
34 int signum;
35};
36
37/**
38 Handles system signals, singleton.
39 Usage: inherit the class EventHandler and then register
40 it to SignalHandler by calling registerHandler with
41 a signal number
42*/
43class SignalHandler {
44public:
45
46 /// get singleton object
47 static SignalHandler *instance();
48 /**
49 Register an event handler
50 @return true on success else false
51 @param signum signal number
52 @param eh event handler
53 @param oldhandler_ret return handler to old sighandler
54 */
55 bool registerHandler(int signum, EventHandler<SignalEvent> *eh, EventHandler<SignalEvent> **oldhandler_ret = 0);
56 /**
57 removes the signum handler
58 @param signum signal number
59 */
60 void removeHandler(int signum);
61private:
62 SignalHandler();
63
64 static void handleSignal(int signum);
65
66 static EventHandler<SignalEvent> *s_signal_handler[NSIG]; ///< NSIG defined in signal.h
67};
68
69}; // end namespace FbTk
70
71#endif // FBTK_SIGNALHANDLER_HH