/****************************************************************************
**
** Definition of TQMutex class
**
** Created : 931107
**
** Copyright (C) 1992-2008 Trolltech ASA.  All rights reserved.
**
** This file is part of the tools module of the TQt GUI Toolkit.
**
** This file may be used under the terms of the GNU General
** Public License versions 2.0 or 3.0 as published by the Free
** Software Foundation and appearing in the files LICENSE.GPL2
** and LICENSE.GPL3 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 been
** publicly approved by Trolltech ASA (or its successors, if any)
** and the KDE Free TQt Foundation.
**
** Please review the following information to ensure GNU General
** Public Licensing requirements will be met:
** http://trolltech.com/products/qt/licenses/licensing/opensource/.
** If you are unsure which license is appropriate for your use, please
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** or contact the sales department at sales@trolltech.com.
**
** This file may be used under the terms of the Q Public License as
** defined by Trolltech ASA and appearing in the file LICENSE.TQPL
** included in the packaging of this file.  Licensees holding valid TQt
** Commercial licenses may use this file in accordance with the TQt
** Commercial License Agreement provided with the Software.
**
** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
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**********************************************************************/

#ifndef TQMUTEX_H
#define TQMUTEX_H

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

#if defined(TQT_THREAD_SUPPORT)

class TQMutexPrivate;

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

class TQ_EXPORT TQMutex
{
    friend class TQThread;
    friend class TQWaitCondition;
    friend class TQWaitConditionPrivate;

public:
    TQMutex(bool recursive = false);
    virtual ~TQMutex();

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

private:
    TQMutexPrivate * d;

#if defined(TQ_DISABLE_COPY)
    TQMutex( const TQMutex & );
    TQMutex &operator=( const TQMutex & );
#endif

public:
    int level();
};

class TQ_EXPORT TQMutexLocker
{
public:
    TQMutexLocker( TQMutex * );
    ~TQMutexLocker();

    TQMutex *mutex() const;

private:
    TQMutex *mtx;

#if defined(TQ_DISABLE_COPY)
    TQMutexLocker( const TQMutexLocker & );
    TQMutexLocker &operator=( const TQMutexLocker & );
#endif
};

inline TQMutexLocker::TQMutexLocker( TQMutex *m )
    : mtx( m )
{
    if ( mtx ) mtx->lock();
}

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

inline TQMutex *TQMutexLocker::mutex() const
{
    return mtx;
}

#endif

#endif
