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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** GNU Lesser General Public License Usage
** Alternatively, 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 1.0, 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.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://www.qtsoftware.com/contact.
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QMUTEX_P_H
#define QMUTEX_P_H
#include "qglobal.h"
#if defined(_OS_UNIX_) || defined(_OS_MAC_)
#include <pthread.h>
#elif defined(_OS_WIN32_)
#include <windows.h>
#endif
class QAtomicInt
{
public:
QAtomicInt(int v=0) : m_value(v) {}
bool testAndSet(int expectedValue,int newValue);
int fetchAndAdd(int valueToAdd);
operator int () const { return m_value; }
bool operator==(int value) const { return m_value == value; }
bool operator!=(int value) const { return m_value != value; }
bool operator!() const { return m_value == 0; }
private:
volatile int m_value;
};
class QMutexPrivate
{
public:
QMutexPrivate();
~QMutexPrivate();
void wait();
void wakeUp();
QAtomicInt contenders;
#if defined(_OS_UNIX_) || defined(_OS_MAC_)
volatile bool wakeup;
pthread_mutex_t mutex;
pthread_cond_t cond;
#elif defined(_OS_WIN32_)
HANDLE event;
#else
#error "unsupported platform"
#endif
};
#endif // QMUTEX_P_H
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