EventSink.h

/*
 * Copyright (C) 2006-2013 Marc Boris Duerner
 *
 * This library 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 2.1 of the License, or (at your option) any later version.
 *
 * As a special exception, you may use this file as part of a free
 * software library without restriction. Specifically, if other files
 * instantiate templates or use macros or inline functions from this
 * file, or you compile this file and link it with other files to
 * produce an executable, this file does not by itself cause the
 * resulting executable to be covered by the GNU General Public
 * License. This exception does not however invalidate any other
 * reasons why the executable file might be covered by the GNU Library
 * General Public License.
 *
 * This library 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 this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */

#ifndef PT_SYSTEM_EVENTSINK_H
#define PT_SYSTEM_EVENTSINK_H

#include <Pt/System/Api.h>
#include <Pt/System/Mutex.h>
#include <Pt/Event.h>
#include <list>

namespace Pt {

namespace System {

class EventSource;

class PT_SYSTEM_API EventSink : private NonCopyable
{
    friend class EventSource;

    public:
        EventSink();

        virtual ~EventSink();

        void commitEvent(const Event& ev);

        void queueEvent(const Event& ev);

        void wake();

    protected:
        virtual void onCommitEvent(const Event& ev) = 0;

        virtual void onQueueEvent(const Event& ev) = 0;

        virtual void onWake() = 0;

    private:
        void onConnect(EventSource& source);

        void onDisconnect(EventSource& source);

        void onUnsubscribe(EventSource& source);

    private:
        mutable RecursiveMutex _mutex;
        std::list<EventSource*> _sources;
};

} // namespace System

} // namespace Pt

#endif // PT_SYSTEM_EVENTSINK_H