doc/html/qmutex-h.html


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<p>This is the verbatim text of the qmutex.h include file. It is provided only for illustration; the copyright remains with Trolltech.
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/****************************************************************************
** $Id: qt/qmutex.h   3.3.8   edited Jan 11 14:38 $
**
** Definition of QMutex class
**
** Created : 931107
**
** Copyright (C) 1992-2007 Trolltech ASA.  All rights reserved.
**
** This file is part of the tools module of the Qt GUI Toolkit.
**
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** License versions 2.0 or 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Alternatively you may (at your option) use any
** later version of the GNU General Public License if such license has
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** and the KDE Free Qt Foundation.
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** Public Licensing requirements will be met:
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** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
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** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
** herein.
**
**********************************************************************/

#ifndef QMUTEX_H
#define QMUTEX_H

#ifndef QT_H
#include "qglobal.h"
#endif // QT_H

#if defined(QT_THREAD_SUPPORT)

class QMutexPrivate;

const int Q_MUTEX_NORMAL = 0;
const int Q_MUTEX_RECURSIVE = 1;

class Q_EXPORT QMutex
{
    friend class QThread;
    friend class QWaitCondition;
    friend class QWaitConditionPrivate;

public:
    QMutex(bool recursive = FALSE);
    virtual ~QMutex();

    void lock();
    void unlock();
    bool locked();
    bool tryLock();

private:
    QMutexPrivate * d;

#if defined(Q_DISABLE_COPY)
    QMutex( const QMutex &amp; );
    QMutex &amp;operator=( const QMutex &amp; );
#endif
};

class Q_EXPORT QMutexLocker
{
public:
    QMutexLocker( QMutex * );
    ~QMutexLocker();

    QMutex *mutex() const;

private:
    QMutex *mtx;

#if defined(Q_DISABLE_COPY)
    QMutexLocker( const QMutexLocker &amp; );
    QMutexLocker &amp;operator=( const QMutexLocker &amp; );
#endif
};

inline QMutexLocker::QMutexLocker( QMutex *m )
    : mtx( m )
{
    if ( mtx ) mtx-&gt;lock();
}

inline QMutexLocker::~QMutexLocker()
{
    if ( mtx ) mtx-&gt;unlock();
}

inline QMutex *QMutexLocker::mutex() const
{
    return mtx;
}

#endif

#endif
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