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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "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 Digia Plc and its Subsidiary(-ies) 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."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "thread.h"
/*
* QThread derived class with additional capability to move a QObject to the
* new thread, to stop the thread and move the QObject back to the thread where
*it came from.
*/
Thread::Thread( QObject *parent)
: QThread (parent)
{
//we need a class that receives signals from other threads and emits a signal in response
shutDownHelper=new QSignalMapper;
shutDownHelper->setMapping(this,0);
connect(this, SIGNAL(started()), this, SLOT(setReadyStatus() ), Qt::DirectConnection);
connect(this, SIGNAL(aboutToStop()), shutDownHelper, SLOT(map()) );
}
//------------------------------------------------------
Thread::~Thread()
{
delete shutDownHelper;
}
//------------------------------------------------------
// starts thread, moves worker to this thread and blocks
void Thread::launchWorker(QObject *worker)
{
this->worker = worker;
start();
worker->moveToThread(this);
shutDownHelper->moveToThread(this);
connect(shutDownHelper, SIGNAL(mapped(int) ), this, SLOT(stopExecutor()), Qt::DirectConnection );
mutex.lock();
waitCondition.wait(&mutex);
}
//------------------------------------------------------
// puts a command to stop processing in the event queue of worker thread
void Thread::stop()
{
emit aboutToStop();
}
//------------------------------------------------------
// methods above this line should be called in gui thread context
// methods below this line are private and will be run in secondary thread context
//------------------------------------------------------
void Thread::stopExecutor() //secondary thread context
{
exit();
}
//------------------------------------------------------
void Thread::setReadyStatus()
{
waitCondition.wakeAll();
}
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