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qmutex.h

This is the verbatim text of the qmutex.h include file. It is provided only for illustration; the copyright remains with Trolltech.

/****************************************************************************
** $Id: qt/qmutex.h   3.3.6   edited Aug 31 2005 $
**
** Definition of QMutex class
**
** Created : 931107
**
** Copyright (C) 1992-2005 Trolltech AS.  All rights reserved.
**
** This file is part of the tools module of the Qt GUI Toolkit.
**
** This file may be distributed under the terms of the Q Public License
** as defined by Trolltech AS of Norway and appearing in the file
** LICENSE.QPL included in the packaging of this file.
**
** This file may be distributed and/or modified under the terms of the
** GNU General Public License version 2 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.
**
** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
** licenses may use this file in accordance with the Qt Commercial License
** Agreement provided with the Software.
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** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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**   information about Qt Commercial License Agreements.
** See http://www.trolltech.com/qpl/ for QPL licensing information.
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**********************************************************************/

#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 & );
    QMutex &operator=( const QMutex & );
#endif
};

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

    QMutex *mutex() const;

private:
    QMutex *mtx;

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

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

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

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

#endif

#endif