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fortunethread.cpp

/****************************************************************************
**
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** This file is part of the example classes of the Qt Toolkit.
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** Foundation and appearing in the files LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file.  Alternatively you may (at
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#include <QtNetwork>

#include "fortunethread.h"

FortuneThread::FortuneThread(QObject *parent)
    : QThread(parent), quit(false)
{
}

//! [0]
00054 FortuneThread::~FortuneThread()
{
    quit = true;
    cond.wakeOne();
    wait();
}
//! [0]

//! [1] //! [2]
00063 void FortuneThread::requestNewFortune(const QString &hostName, quint16 port)
{
//! [1]
    QMutexLocker locker(&mutex);
    this->hostName = hostName;
    this->port = port;
//! [3]
    if (!isRunning())
        start();
    else
        cond.wakeOne();
}
//! [2] //! [3]

//! [4]
00078 void FortuneThread::run()
{
    mutex.lock();
//! [4] //! [5]
    QString serverName = hostName;
    quint16 serverPort = port;
    mutex.unlock();
//! [5]

//! [6]
    while (!quit) {
//! [7]
        const int Timeout = 5 * 1000;

        QTcpSocket socket;
        socket.connectToHost(serverName, serverPort);
//! [6] //! [8]

        if (!socket.waitForConnected(Timeout)) {
            emit error(socket.error(), socket.errorString());
            return;
        }
//! [8] //! [9]

        while (socket.bytesAvailable() < (int)sizeof(quint16)) {
            if (!socket.waitForReadyRead(Timeout)) {
                emit error(socket.error(), socket.errorString());
                return;
            }
//! [9] //! [10]
        }
//! [10] //! [11]

        quint16 blockSize;
        QDataStream in(&socket);
        in.setVersion(QDataStream::Qt_4_0);
        in >> blockSize;
//! [11] //! [12]

        while (socket.bytesAvailable() < blockSize) {
            if (!socket.waitForReadyRead(Timeout)) {
                emit error(socket.error(), socket.errorString());
                return;
            }
//! [12] //! [13]
        }
//! [13] //! [14]

        QMutexLocker locker(&mutex);

        QString fortune;
        in >> fortune;
        emit newFortune(fortune);
//! [7] //! [14] //! [15]

        cond.wait(&mutex);
        serverName = hostName;
        serverPort = port;
    }
//! [15]
}

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