3c74720f74
The 'worker' function argument shadows the class member of the same
name, and 'worker = worker;' assigns the function argument to itself,
not to the member as intended.
examples/tutorials/threads/movedobject/thread.cpp:69: warning:
explicitly assigning a variable of type 'QObject *' to itself [-Wself-
worker = worker;
~~~~~~ ^ ~~~~~~
Change-Id: If4adf486a86a4ba4e7f7040a7771a70b7dd9aa86
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
101 lines
3.7 KiB
C++
101 lines
3.7 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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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 Nokia Corporation and its Subsidiary(-ies) nor
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** the names of its contributors may be used to endorse or promote
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** products derived from this software without specific prior written
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** permission.
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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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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "thread.h"
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/*
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* QThread derived class with additional capability to move a QObject to the
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* new thread, to stop the thread and move the QObject back to the thread where
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*it came from.
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*/
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Thread::Thread( QObject *parent)
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: QThread (parent)
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{
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//we need a class that receives signals from other threads and emits a signal in response
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shutDownHelper=new QSignalMapper;
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shutDownHelper->setMapping(this,0);
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connect(this, SIGNAL(started()), this, SLOT(setReadyStatus() ), Qt::DirectConnection);
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connect(this, SIGNAL(aboutToStop()), shutDownHelper, SLOT(map()) );
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}
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//------------------------------------------------------
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Thread::~Thread()
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{
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delete shutDownHelper;
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}
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//------------------------------------------------------
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// starts thread, moves worker to this thread and blocks
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void Thread::launchWorker(QObject *worker)
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{
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this->worker = worker;
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start();
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worker->moveToThread(this);
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shutDownHelper->moveToThread(this);
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connect(shutDownHelper, SIGNAL(mapped(int) ), this, SLOT(stopExecutor()), Qt::DirectConnection );
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mutex.lock();
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waitCondition.wait(&mutex);
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}
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//------------------------------------------------------
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// puts a command to stop processing in the event queue of worker thread
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void Thread::stop()
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{
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emit aboutToStop();
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}
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//------------------------------------------------------
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// methods above this line should be called in gui thread context
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// methods below this line are private and will be run in secondary thread context
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//------------------------------------------------------
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void Thread::stopExecutor() //secondary thread context
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{
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exit();
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}
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//------------------------------------------------------
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void Thread::setReadyStatus()
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{
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waitCondition.wakeAll();
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}
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