82 lines
2.5 KiB
C++
82 lines
2.5 KiB
C++
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// SignalHandler.cc for Fluxbox Window Manager
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// Copyright (c) 2002 Henrik Kinnunen (fluxgen@linuxmail.org)
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the "Software"),
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// to deal in the Software without restriction, including without limitation
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// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// and/or sell copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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// $Id: SignalHandler.cc,v 1.1 2002/11/26 16:01:27 fluxgen Exp $
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#include "SignalHandler.hh"
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namespace FbTk {
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EventHandler<SignalEvent> *SignalHandler::s_signal_handler[NSIG];
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SignalHandler::SignalHandler() {
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// clear signal list
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for (int i=0; i < NSIG; ++i)
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s_signal_handler[i] = 0;
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}
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SignalHandler *SignalHandler::instance() {
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static SignalHandler singleton;
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return &singleton;
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}
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bool SignalHandler::registerHandler(int signum, EventHandler<SignalEvent> *eh,
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EventHandler<SignalEvent> **oldhandler_ret) {
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// must be less than NSIG
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if (signum >= NSIG)
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return false;
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// get old signal handler for this signum
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if (oldhandler_ret != 0)
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*oldhandler_ret = s_signal_handler[signum];
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struct sigaction sa;
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// set callback
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sa.sa_handler = SignalHandler::handleSignal;
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sigemptyset (&sa.sa_mask);
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sa.sa_flags = 0;
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if (sigaction(signum, &sa, 0) == -1)
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return false;
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s_signal_handler[signum] = eh;
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return true;
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}
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void SignalHandler::removeHandler(int signum) {
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if (signum < NSIG)
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s_signal_handler[signum] = 0; // clear handler pointer
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}
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void SignalHandler::handleSignal(int signum) {
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if (signum >= NSIG)
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return;
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// make sure we got a handler for this signal
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if (s_signal_handler[signum] != 0) {
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SignalEvent sigev;
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sigev.signum = signum;
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s_signal_handler[signum]->handleEvent(&sigev);
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}
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}
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};
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