unixsignalhandler.hpp

/* Copyright (c) 2014-2015, The Nuria Project
 * The NuriaProject Framework is free software: you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, either version 3 of the License,
 * or (at your option) any later version.
 * 
 * The NuriaProject Framework is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with The NuriaProject Framework.
 * If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef UNIXSIGNALHANDLER_HPP
#define UNIXSIGNALHANDLER_HPP

#include "callback.hpp"
#include <QObject>

namespace Nuria {

class UnixSignalHandlerPrivate;

class NURIA_CORE_EXPORT UnixSignalHandler : public QObject {
        Q_OBJECT
public:
        
        static UnixSignalHandler *get ();
        
        ~UnixSignalHandler () override;
        
        bool listenToUnixSignal (int signalId);
        
        bool ignoreUnixSignal (int signalId);
        
        bool isListeningTo (int signalId);
        
        void invokeOnSignal (int signalId, const Callback &callback);
        
signals:
        
        void signalRaised (int signalId);
        
        void sigTerm ();
        
        void sigInterrupt ();
        
        void sigUser1 ();
        
        void sigUser2 ();
        
private slots:
        
        void signalDelegate ();
        
private:
        explicit UnixSignalHandler (QObject *parent = 0);
        
        bool createInternalPipe ();
        void printError (const char *message);
        bool tryReadUnixSignal ();
        void invokeSignalHandlers (int signalId);
        
        UnixSignalHandlerPrivate *d_ptr;
        
};

}

#endif // UNIXSIGNALHANDLER_HPP