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/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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 Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtCore>
#include <stdio.h>
#include <stdlib.h>
//! [0]
const int DataSize = 100000;
const int BufferSize = 8192;
char buffer[BufferSize];
QWaitCondition bufferNotEmpty;
QWaitCondition bufferNotFull;
QMutex mutex;
int numUsedBytes = 0;
//! [0]
//! [1]
class Producer : public QThread
//! [1] //! [2]
{
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();
}
}
//! [2]
//! [3]
class Consumer : public QThread
//! [3] //! [4]
{
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");
}
//! [4]
//! [5]
int main(int argc, char *argv[])
//! [5] //! [6]
{
QCoreApplication app(argc, argv);
Producer producer;
Consumer consumer;
producer.start();
consumer.start();
producer.wait();
consumer.wait();
return 0;
}
//! [6]
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