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/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the documentation 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 Technology Preview License Agreement accompanying
** this package.
**
** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
//! [0]
QReadWriteLock lock;
void ReaderThread::run()
{
...
lock.lockForRead();
read_file();
lock.unlock();
...
}
void WriterThread::run()
{
...
lock.lockForWrite();
write_file();
lock.unlock();
...
}
//! [0]
//! [1]
QReadWriteLock lock;
QByteArray readData()
{
QReadLocker locker(&lock);
...
return data;
}
//! [1]
//! [2]
QReadWriteLock lock;
QByteArray readData()
{
lock.lockForRead();
...
lock.unlock();
return data;
}
//! [2]
//! [3]
QReadWriteLock lock;
void writeData(const QByteArray &data)
{
QWriteLocker locker(&lock);
...
}
//! [3]
//! [4]
QReadWriteLock lock;
void writeData(const QByteArray &data)
{
lock.lockForWrite();
...
lock.unlock();
}
//! [4]
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