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diff --git a/qtools/qmutex_p.h b/qtools/qmutex_p.h
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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