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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QMUTEX_P_H
#define QMUTEX_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists for the convenience
// of qmutex.cpp, qmutex_unix.cpp, and qmutex_win.cpp.  This header
// file may change from version to version without notice, or even be
// removed.
//
// We mean it.
//

#include <QtCore/qglobal.h>
#include <QtCore/qnamespace.h>
#include <QtCore/qmutex.h>

#if defined(Q_OS_SYMBIAN)
# include <e32std.h>
#endif

QT_BEGIN_NAMESPACE

class QMutexPrivate : public QMutexData {
public:
    QMutexPrivate(QMutex::RecursionMode mode);
    ~QMutexPrivate();

    bool wait(int timeout = -1);
    void wakeUp();

    // 1ms = 1000000ns
    enum { MaximumSpinTimeThreshold = 1000000 };
    volatile qint64 maximumSpinTime;
    volatile qint64 averageWaitTime;
    Qt::HANDLE owner;
    uint count;

#if defined(Q_OS_UNIX) && !defined(Q_OS_LINUX) && !defined(Q_OS_SYMBIAN)
    volatile bool wakeup;
    pthread_mutex_t mutex;
    pthread_cond_t cond;
#elif defined(Q_OS_WIN32) || defined(Q_OS_WINCE)
    HANDLE event;
#elif defined(Q_OS_SYMBIAN)
    RSemaphore lock;
#endif
};

inline QMutexData::QMutexData(QMutex::RecursionMode mode)
    : recursive(mode == QMutex::Recursive)
{}

inline QMutexData::~QMutexData() {}

QT_END_NAMESPACE

#endif // QMUTEX_P_H