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# ratecontroller.h Example File
network/torrent/ratecontroller.h

    /****************************************************************************
    **
    ** Copyright (C) 2004-2006 Trolltech ASA. All rights reserved.
    **
    ** This file is part of the example classes of the Qt Toolkit.
    **
    ** Licensees holding valid Qt Preview licenses may use this file in
    ** accordance with the Qt Preview License Agreement provided with the
    ** Software.
    **
    ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
    ** information about Qt Commercial License Agreements.
    **
    ** Contact info@trolltech.com if any conditions of this licensing are
    ** not clear to you.
    **
    ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
    ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
    **
    ****************************************************************************/

    #ifndef RATECONTROLLER_H
    #define RATECONTROLLER_H

    #include <QObject>
    #include <QSet>
    #include <QTime>

    class PeerWireClient;

    class RateController : public QObject
    {
        Q_OBJECT

    public:
        inline RateController(QObject *parent = 0)
            : QObject(parent), transferScheduled(false) { }
        static RateController *instance();

        void addSocket(PeerWireClient *socket);
        void removeSocket(PeerWireClient *socket);

        inline int uploadLimit() const { return upLimit; }
        inline int downloadLimit() const { return downLimit; }
        inline void setUploadLimit(int bytesPerSecond) { upLimit = bytesPerSecond; }
        void setDownloadLimit(int bytesPerSecond);

    public slots:
        void transfer();
        void scheduleTransfer();

    private:
        QTime stopWatch;
        QSet<PeerWireClient *> sockets;
        int upLimit;
        int downLimit;
        bool transferScheduled;
    };

    #endif