// SignalHandler.hh for FbTk // Copyright (c) 2002 - 2003 Henrik Kinnunen (fluxgen at fluxbox dot 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. // $Id$ #ifndef FBTK_SIGNALHANDLER_HH #define FBTK_SIGNALHANDLER_HH #include <signal.h> namespace FbTk { /// Base class that SignalHandler calls when it gets a signal /// Use this to catch system signals class SignalEventHandler { public: virtual void handleSignal(int signum) = 0; virtual ~SignalEventHandler() { } }; /// Handles system signals, singleton. /** Usage: inherit the class SignalEventHandler and then register it to SignalHandler by calling registerHandler with a signal number */ class SignalHandler { public: /// get singleton object static SignalHandler &instance(); /** Register an event handler @return true on success else false @param signum signal number @param eh event handler @param oldhandler_ret return handler to old sighandler */ bool registerHandler(int signum, SignalEventHandler *eh, SignalEventHandler **oldhandler_ret = 0); #ifdef NOT_USED /** removes the signum handler @param signum signal number */ void removeHandler(int signum); #endif private: SignalHandler(); static void handleSignal(int signum); static SignalEventHandler *s_signal_handler[NSIG]; ///< NSIG defined in signal.h }; } // end namespace FbTk #endif // FBTK_SIGNALHANDLER_HH