/****************************************************************************

**

** All rights reserved.

** 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 Technology Preview License Agreement accompanying

** this package.

**

** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.

**

** If you have questions regarding the use of this file, please contact

** Nokia at qt-info@nokia.com.

**

**

**

**

**

**

**

**

** $QT_END_LICENSE$

**

****************************************************************************/

#ifndef QBASICATOMIC_H

#define QBASICATOMIC_H

#include <QtCore/qglobal.h>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Core)

class Q_CORE_EXPORT QBasicAtomicInt

{

public:

#ifdef QT_ARCH_PARISC

    int _q_lock[4];

#endif

#if defined(QT_ARCH_WINDOWS) || defined(QT_ARCH_WINDOWSCE)

    union { // needed for Q_BASIC_ATOMIC_INITIALIZER

        volatile long _q_value;

    };

#else

    volatile int _q_value;

#endif

    // Non-atomic API

    inline bool operator==(int value) const

    {

        return _q_value == value;

    }

    inline bool operator!=(int value) const

    {

        return _q_value != value;

    }

    inline bool operator!() const

    {

        return _q_value == 0;

    }

    inline operator int() const

    {

        return _q_value;

    }

    inline QBasicAtomicInt &operator=(int value)

    {

#ifdef QT_ARCH_PARISC

        this->_q_lock[0] = this->_q_lock[1] = this->_q_lock[2] = this->_q_lock[3] = -1;

#endif

        _q_value = value;

        return *this;

    }

    // Atomic API, implemented in qatomic_XXX.h

    static bool isReferenceCountingNative();

    static bool isReferenceCountingWaitFree();

    bool ref();

    bool deref();

    static bool isTestAndSetNative();

    static bool isTestAndSetWaitFree();

    bool testAndSetRelaxed(int expectedValue, int newValue);

    bool testAndSetAcquire(int expectedValue, int newValue);

    bool testAndSetRelease(int expectedValue, int newValue);

    bool testAndSetOrdered(int expectedValue, int newValue);

    static bool isFetchAndStoreNative();

    static bool isFetchAndStoreWaitFree();

    int fetchAndStoreRelaxed(int newValue);

    int fetchAndStoreAcquire(int newValue);

    int fetchAndStoreRelease(int newValue);

    int fetchAndStoreOrdered(int newValue);

    static bool isFetchAndAddNative();

    static bool isFetchAndAddWaitFree();

    int fetchAndAddRelaxed(int valueToAdd);

    int fetchAndAddAcquire(int valueToAdd);

    int fetchAndAddRelease(int valueToAdd);

    int fetchAndAddOrdered(int valueToAdd);

};

template <typename T>

class QBasicAtomicPointer

{

public:

#ifdef QT_ARCH_PARISC

    int _q_lock[4];

#endif

#if defined(QT_ARCH_WINDOWS) || defined(QT_ARCH_WINDOWSCE)

    union {

        T * volatile _q_value;

#  if !defined(Q_OS_WINCE) && !defined(__i386__) && !defined(_M_IX86)

        qint64

#  else

        long

#  endif

        volatile _q_value_integral;

    };

#else

    T * volatile _q_value;

#endif

    // Non-atomic API

    inline bool operator==(T *value) const

    {

        return _q_value == value;

    }

    inline bool operator!=(T *value) const

    {

        return !operator==(value);

    }

    inline bool operator!() const

    {

        return operator==(0);

    }

    inline operator T *() const

    {

        return _q_value;

    }

    inline T *operator->() const

    {

        return _q_value;

    }

    inline QBasicAtomicPointer<T> &operator=(T *value)

    {

#ifdef QT_ARCH_PARISC

        this->_q_lock[0] = this->_q_lock[1] = this->_q_lock[2] = this->_q_lock[3] = -1;

#endif

        _q_value = value;

        return *this;

    }

    // Atomic API, implemented in qatomic_XXX.h

    static bool isTestAndSetNative();

    static bool isTestAndSetWaitFree();

    bool testAndSetRelaxed(T *expectedValue, T *newValue);

    bool testAndSetAcquire(T *expectedValue, T *newValue);

    bool testAndSetRelease(T *expectedValue, T *newValue);

    bool testAndSetOrdered(T *expectedValue, T *newValue);

    static bool isFetchAndStoreNative();

    static bool isFetchAndStoreWaitFree();

    T *fetchAndStoreRelaxed(T *newValue);

    T *fetchAndStoreAcquire(T *newValue);

    T *fetchAndStoreRelease(T *newValue);

    T *fetchAndStoreOrdered(T *newValue);

    static bool isFetchAndAddNative();

    static bool isFetchAndAddWaitFree();

    T *fetchAndAddRelaxed(qptrdiff valueToAdd);

    T *fetchAndAddAcquire(qptrdiff valueToAdd);

    T *fetchAndAddRelease(qptrdiff valueToAdd);

    T *fetchAndAddOrdered(qptrdiff valueToAdd);

};

#ifdef QT_ARCH_PARISC

#  define Q_BASIC_ATOMIC_INITIALIZER(a) {{-1,-1,-1,-1},(a)}

#elif defined(QT_ARCH_WINDOWS) || defined(QT_ARCH_WINDOWSCE)

#  define Q_BASIC_ATOMIC_INITIALIZER(a) { {(a)} }

#else

#  define Q_BASIC_ATOMIC_INITIALIZER(a) { (a) }

#endif

QT_END_NAMESPACE

QT_END_HEADER

#if defined(QT_MOC) || defined(QT_BUILD_QMAKE) || defined(QT_RCC) || defined(QT_UIC) || defined(QT_BOOTSTRAPPED)

#  include <QtCore/qatomic_bootstrap.h>

#else

#  include <QtCore/qatomic_arch.h>

#endif

#endif // QBASIC_ATOMIC