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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   3.2.1   edited May 13 09:08 $
    **
    ** Definition of QMutex class
    **
    ** Created : 931107
    **
    ** Copyright (C) 1992-2002 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.
    **
    ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
    ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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    ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
    **   information about Qt Commercial License Agreements.
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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