diff options
| author | Lars Knoll <lars.knoll@nokia.com> | 2009-03-23 10:18:55 +0100 |
|---|---|---|
| committer | Simon Hausmann <simon.hausmann@nokia.com> | 2009-03-23 10:18:55 +0100 |
| commit | e5fcad302d86d316390c6b0f62759a067313e8a9 (patch) | |
| tree | c2afbf6f1066b6ce261f14341cf6d310e5595bc1 /examples/threads/waitconditions | |
Long live Qt 4.5!
Diffstat (limited to 'examples/threads/waitconditions')
| -rw-r--r-- | examples/threads/waitconditions/waitconditions.cpp | 126 | ||||
| -rw-r--r-- | examples/threads/waitconditions/waitconditions.pro | 20 |
2 files changed, 146 insertions, 0 deletions
diff --git a/examples/threads/waitconditions/waitconditions.cpp b/examples/threads/waitconditions/waitconditions.cpp new file mode 100644 index 0000000000..44188d58c6 --- /dev/null +++ b/examples/threads/waitconditions/waitconditions.cpp @@ -0,0 +1,126 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (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 either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** 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 1.0, included in the file LGPL_EXCEPTION.txt in this +** package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 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 the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at qt-sales@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] diff --git a/examples/threads/waitconditions/waitconditions.pro b/examples/threads/waitconditions/waitconditions.pro new file mode 100644 index 0000000000..8c34cecdb8 --- /dev/null +++ b/examples/threads/waitconditions/waitconditions.pro @@ -0,0 +1,20 @@ +###################################################################### +# Automatically generated by qmake (1.08a) Fri Jan 7 15:25:07 2005 +###################################################################### + +TEMPLATE = app +CONFIG -= moc app_bundle +DEPENDPATH += . +INCLUDEPATH += . + +# Input +SOURCES += waitconditions.cpp +CONFIG += qt warn_on create_prl link_prl console +OBJECTS_DIR=.obj/debug-shared +MOC_DIR=.moc/debug-shared + +# install +target.path = $$[QT_INSTALL_EXAMPLES]/threads/waitconditions +sources.files = $$SOURCES $$HEADERS $$RESOURCES $$FORMS waitconditions.pro +sources.path = $$[QT_INSTALL_EXAMPLES]/threads/waitconditions +INSTALLS += target sources |