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authorfluxgen <fluxgen>2002-08-14 00:01:57 (GMT)
committerfluxgen <fluxgen>2002-08-14 00:01:57 (GMT)
commitc87d64e19a6d061b03bb6722595571e6c068a333 (patch)
tree187873c66b67eb2eb34f606f110347f8c29ae9b1 /src/SignalHandler.cc
parentfdd8313050bb2f36a204e9104dc78c9c268e4d52 (diff)
downloadfluxbox-c87d64e19a6d061b03bb6722595571e6c068a333.zip
fluxbox-c87d64e19a6d061b03bb6722595571e6c068a333.tar.bz2
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1// SignalHandler.cc 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.cc,v 1.1 2002/08/13 23:57:04 fluxgen Exp $
23
24#include "SignalHandler.hh"
25
26namespace FbTk {
27
28SignalHandler::EventHandler *SignalHandler::s_signal_handler[NSIG];
29
30SignalHandler::SignalHandler() {
31 // clear signal list
32 for (int i=0; i < NSIG; ++i)
33 s_signal_handler[i] = 0;
34}
35
36SignalHandler *SignalHandler::instance() {
37 static SignalHandler singleton;
38 return &singleton;
39}
40
41bool SignalHandler::registerHandler(int signum, EventHandler *eh, EventHandler **oldhandler_ret) {
42 // must be less than NSIG
43 if (signum >= NSIG)
44 return false;
45
46 // get old signal handler for this signum
47 if (oldhandler_ret != 0)
48 *oldhandler_ret = s_signal_handler[signum];
49
50 struct sigaction sa;
51 // set callback
52 sa.sa_handler = SignalHandler::handleSignal;
53 sigemptyset (&sa.sa_mask);
54 sa.sa_flags = 0;
55
56 if (sigaction(signum, &sa, 0) == -1)
57 return false;
58
59 s_signal_handler[signum] = eh;
60
61 return true;
62}
63
64void SignalHandler::removeHandler(int signum) {
65 if (signum < NSIG)
66 s_signal_handler[signum] = 0; // clear handler pointer
67}
68
69void SignalHandler::handleSignal(int signum) {
70 // make sure we got a handler for this signal
71 if (s_signal_handler[signum] != 0)
72 s_signal_handler[signum]->handleSignal(signum);
73}
74
75};