![]() |
Home · All Namespaces · All Classes · Main Classes · Grouped Classes · Modules · Functions |
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (qt-info@nokia.com)
**
** This file is part of the example classes of the Qt Toolkit.
**
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** 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 qt-sales@nokia.com.
**
****************************************************************************/
#include <QtCore>
#include <stdio.h>
#include <stdlib.h>
const int DataSize = 100000;
const int BufferSize = 8192;
char buffer[BufferSize];
QWaitCondition bufferNotEmpty;
QWaitCondition bufferNotFull;
QMutex mutex;
int numUsedBytes = 0;
class Producer : public QThread
{
public:
void run();
};
void Producer::run()
{
qsrand(QTime(0,0,0).secsTo(QTime::currentTime()));
for (int i = 0; i < DataSize; ++i) {
mutex.lock();
if (numUsedBytes == BufferSize)
bufferNotFull.wait(&mutex);
mutex.unlock();
buffer[i % BufferSize] = "ACGT"[(int)qrand() % 4];
mutex.lock();
++numUsedBytes;
bufferNotEmpty.wakeAll();
mutex.unlock();
}
}
class Consumer : public QThread
{
public:
void run();
};
void Consumer::run()
{
for (int i = 0; i < DataSize; ++i) {
mutex.lock();
if (numUsedBytes == 0)
bufferNotEmpty.wait(&mutex);
mutex.unlock();
fprintf(stderr, "%c", buffer[i % BufferSize]);
mutex.lock();
--numUsedBytes;
bufferNotFull.wakeAll();
mutex.unlock();
}
fprintf(stderr, "\n");
}
int main(int argc, char *argv[])
{
QCoreApplication app(argc, argv);
Producer producer;
Consumer consumer;
producer.start();
consumer.start();
producer.wait();
consumer.wait();
return 0;
}
Copyright © 2009 Nokia Corporation and/or its subsidiary(-ies) | Trademarks | Qt 4.5.0-rc1 |