// SignalHandler.cc for Fluxbox Window Manager // Copyright (c) 2002 Henrik Kinnunen (fluxgen@linuxmail.org) // // Permission is hereby granted, free of charge, to any person obtaining a // copy of this software and associated documentation files (the "Software"), // to deal in the Software without restriction, including without limitation // the rights to use, copy, modify, merge, publish, distribute, sublicense, // and/or sell copies of the Software, and to permit persons to whom the // Software is furnished to do so, subject to the following conditions: // // The above copyright notice and this permission notice shall be included in // all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL // THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER // DEALINGS IN THE SOFTWARE. // $Id: SignalHandler.cc,v 1.3 2002/10/12 13:28:03 fluxgen Exp $ #include "SignalHandler.hh" namespace FbTk { EventHandler<SignalEvent> *SignalHandler::s_signal_handler[NSIG]; SignalHandler::SignalHandler() { // clear signal list for (int i=0; i < NSIG; ++i) s_signal_handler[i] = 0; } SignalHandler *SignalHandler::instance() { static SignalHandler singleton; return &singleton; } bool SignalHandler::registerHandler(int signum, EventHandler<SignalEvent> *eh, EventHandler<SignalEvent> **oldhandler_ret) { // must be less than NSIG if (signum >= NSIG) return false; // get old signal handler for this signum if (oldhandler_ret != 0) *oldhandler_ret = s_signal_handler[signum]; struct sigaction sa; // set callback sa.sa_handler = SignalHandler::handleSignal; sigemptyset (&sa.sa_mask); sa.sa_flags = 0; if (sigaction(signum, &sa, 0) == -1) return false; s_signal_handler[signum] = eh; return true; } void SignalHandler::removeHandler(int signum) { if (signum < NSIG) s_signal_handler[signum] = 0; // clear handler pointer } void SignalHandler::handleSignal(int signum) { if (signum >= NSIG) return; // make sure we got a handler for this signal if (s_signal_handler[signum] != 0) { SignalEvent sigev; sigev.signum = signum; s_signal_handler[signum]->handleEvent(&sigev); } } };