f14e268694
Change-Id: Ia7b1f02cab9fa0fc9e487ca49d75e85ed0cfee9d Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
138 lines
3.7 KiB
C++
138 lines
3.7 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/legal
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** You may use this file under the terms of the BSD license as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
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** of its contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include <QtCore>
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#include <stdio.h>
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#include <stdlib.h>
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//! [0]
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const int DataSize = 100000;
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const int BufferSize = 8192;
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char buffer[BufferSize];
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QWaitCondition bufferNotEmpty;
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QWaitCondition bufferNotFull;
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QMutex mutex;
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int numUsedBytes = 0;
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//! [0]
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//! [1]
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class Producer : public QThread
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//! [1] //! [2]
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{
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public:
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Producer(QObject *parent = NULL) : QThread(parent)
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{
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}
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void run()
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{
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qsrand(QTime(0,0,0).secsTo(QTime::currentTime()));
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for (int i = 0; i < DataSize; ++i) {
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mutex.lock();
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if (numUsedBytes == BufferSize)
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bufferNotFull.wait(&mutex);
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mutex.unlock();
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buffer[i % BufferSize] = "ACGT"[(int)qrand() % 4];
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mutex.lock();
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++numUsedBytes;
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bufferNotEmpty.wakeAll();
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mutex.unlock();
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}
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}
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};
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//! [2]
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//! [3]
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class Consumer : public QThread
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//! [3] //! [4]
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{
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Q_OBJECT
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public:
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Consumer(QObject *parent = NULL) : QThread(parent)
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{
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}
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void run()
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{
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for (int i = 0; i < DataSize; ++i) {
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mutex.lock();
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if (numUsedBytes == 0)
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bufferNotEmpty.wait(&mutex);
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mutex.unlock();
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fprintf(stderr, "%c", buffer[i % BufferSize]);
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mutex.lock();
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--numUsedBytes;
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bufferNotFull.wakeAll();
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mutex.unlock();
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}
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fprintf(stderr, "\n");
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}
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signals:
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void stringConsumed(const QString &text);
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};
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//! [4]
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//! [5]
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int main(int argc, char *argv[])
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//! [5] //! [6]
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{
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QCoreApplication app(argc, argv);
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Producer producer;
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Consumer consumer;
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producer.start();
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consumer.start();
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producer.wait();
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consumer.wait();
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return 0;
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}
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//! [6]
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#include "waitconditions.moc"
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