/****************************************************************************
**
** Copyright (C) 1992-2004 Trolltech AS. All rights reserved.
**
** This file is part of the core module of the Qt Toolkit.
**
** Licensees holding valid Qt Preview licenses may use this file in
** accordance with the Qt Preview License Agreement provided with the
** Software.
**
** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
** information about Qt Commercial License Agreements.
**
** Contact info@trolltech.com if any conditions of this licensing are
** not clear to you.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/

#include "qmutex.h"
#include "qatomic.h"

/*!
    Constructs a mutex locker based on mutex \a m.
*/
QMutexLocker::QMutexLocker(QStaticMutex &m)
{
    if (!m) { // mutex not yet initialized... do it now
        QMutex *x = new QMutex;
        if (!q_atomic_test_and_set_ptr(&m, 0, x))
            delete x; // someone beat us to it
    }
    mtx = reinterpret_cast<QMutex *>(m);
    relock();
}

/*!
    \fn bool QMutex::locked()

    Use isLocked() instead.
*/
