Extends QThread to create thread
Foundations of Qt Development\Chapter12\inorderthreads\main.cpp /* * Copyright (c) 2006-2007, Johan Thelin * * All rights reserved. * * Redistribution and use in source and binary forms, with or without modification, * are permitted provided that the following conditions are met: * * * Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * Neither the name of APress nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * */ #include <QApplication> #include <QThread> #include <QMutex> #include <QMessageBox> #include <QtDebug> class TextThread : public QThread { public: TextThread( QString text ); void run(); private: QString m_text; }; bool stopThreads = false; TextThread::TextThread( QString text ) : QThread() { m_text = text; } QMutex mutex; void TextThread::run() { while( !stopThreads ) { mutex.lock(); if( stopThreads ) return; qDebug() << m_text; sleep( 1 ); mutex.unlock(); } } int main( int argc, char **argv ) { QApplication app( argc, argv ); TextThread foo( "Foo" ), bar( "Bar" ); foo.start(); bar.start(); QMessageBox::information( 0, "Threading", "Close me to stop!" ); stopThreads = true; foo.wait(); bar.wait(); return 0; }
1. | Using QThread | ||
2. | Producer and consumer by Qt thread | ||
3. | Thread sleeps | ||
4. | Wait condition |