ratecontroller.h

qt-x11-opensource-src-4.1.4.tar.gz源码

/****************************************************************************
**
** Copyright (C) 2004-2006 Trolltech ASA. All rights reserved.
**
** This file is part of the example classes of the Qt Toolkit.
**
** This file may be used under the terms of the GNU General Public
** License version 2.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of
** this file.  Please review the following information to ensure GNU
** General Public Licensing requirements will be met:
** http://www.trolltech.com/products/qt/opensource.html
**
** If you are unsure which license is appropriate for your use, please
** review the following information:
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** sales department at [e-mail].
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** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
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#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