70 lines
2.3 KiB
C++
70 lines
2.3 KiB
C++
// SignalHandler.hh for FbTk
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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.hh,v 1.4 2003/01/05 23:34:38 fluxgen Exp $
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#ifndef FBTK_SIGNALHANDLER_HH
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#define FBTK_SIGNALHANDLER_HH
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#include <signal.h>
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namespace FbTk {
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class SignalEventHandler {
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public:
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virtual void handleSignal(int signum) = 0;
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};
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/**
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Handles system signals, singleton.
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Usage: inherit the class SignalEventHandler and then register
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it to SignalHandler by calling registerHandler with
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a signal number
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*/
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class SignalHandler {
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public:
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/// get singleton object
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static SignalHandler *instance();
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/**
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Register an event handler
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@return true on success else false
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@param signum signal number
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@param eh event handler
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@param oldhandler_ret return handler to old sighandler
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*/
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bool registerHandler(int signum, SignalEventHandler *eh, SignalEventHandler **oldhandler_ret = 0);
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/**
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removes the signum handler
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@param signum signal number
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*/
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void removeHandler(int signum);
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private:
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SignalHandler();
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static void handleSignal(int signum);
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static SignalEventHandler *s_signal_handler[NSIG]; ///< NSIG defined in signal.h
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};
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}; // end namespace FbTk
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#endif // FBTK_SIGNALHANDLER_HH
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