Home · All Namespaces · All Classes · Main Classes · Grouped Classes · Modules · Functions

fortunethread.cpp Example File
network/blockingfortuneclient/fortunethread.cpp

 /****************************************************************************
 **
 ** Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
 ** Contact: Qt Software Information ([email protected])
 **
 ** This file is part of the example classes of the Qt Toolkit.
 **
 ** Commercial Usage
 ** Licensees holding valid Qt Commercial licenses may use this file in
 ** accordance with the Qt Commercial License Agreement provided with the
 ** Software or, alternatively, in accordance with the terms contained in
 ** a written agreement between you and Nokia.
 **
 **
 ** GNU General Public License Usage
 ** Alternatively, this file may be used under the terms of the GNU
 ** General Public License versions 2.0 or 3.0 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.fsf.org/licensing/licenses/info/GPLv2.html and
 ** http://www.gnu.org/copyleft/gpl.html.  In addition, as a special
 ** exception, Nokia gives you certain additional rights. These rights
 ** are described in the Nokia Qt GPL Exception version 1.3, included in
 ** the file GPL_EXCEPTION.txt in this package.
 **
 ** Qt for Windows(R) Licensees
 ** As a special exception, Nokia, as the sole copyright holder for Qt
 ** Designer, grants users of the Qt/Eclipse Integration plug-in the
 ** right for the Qt/Eclipse Integration to link to functionality
 ** provided by Qt Designer and its related libraries.
 **
 ** If you are unsure which license is appropriate for your use, please
 ** contact the sales department at [email protected].
 **
 ****************************************************************************/

 #include <QtNetwork>

 #include "fortunethread.h"

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

 FortuneThread::~FortuneThread()
 {
     quit = true;
     cond.wakeOne();
     wait();
 }

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

 void FortuneThread::run()
 {
     mutex.lock();
     QString serverName = hostName;
     quint16 serverPort = port;
     mutex.unlock();

     while (!quit) {
         const int Timeout = 5 * 1000;

         QTcpSocket socket;
         socket.connectToHost(serverName, serverPort);

         if (!socket.waitForConnected(Timeout)) {
             emit error(socket.error(), socket.errorString());
             return;
         }

         while (socket.bytesAvailable() < (int)sizeof(quint16)) {
             if (!socket.waitForReadyRead(Timeout)) {
                 emit error(socket.error(), socket.errorString());
                 return;
             }
         }

         quint16 blockSize;
         QDataStream in(&socket);
         in.setVersion(QDataStream::Qt_4_0);
         in >> blockSize;

         while (socket.bytesAvailable() < blockSize) {
             if (!socket.waitForReadyRead(Timeout)) {
                 emit error(socket.error(), socket.errorString());
                 return;
             }
         }

         QMutexLocker locker(&mutex);

         QString fortune;
         in >> fortune;
         emit newFortune(fortune);

         cond.wait(&mutex);
         serverName = hostName;
         serverPort = port;
     }
 }


Copyright © 2008 Nokia Trademarks
Qt 4.4.3