/****************************************************************************
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** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
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** This file is part of the QtCore module of the Qt Toolkit.
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** 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
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** file. Please review the following information to ensure the GNU General
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****************************************************************************/

#ifndef QOLDBASICATOMIC_H
#define QOLDBASICATOMIC_H

#include <QtCore/qglobal.h>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE


#if 0
// silence syncqt warnings
QT_END_NAMESPACE
QT_END_HEADER

#pragma qt_no_master_include
#pragma qt_sync_stop_processing
#endif

class Q_CORE_EXPORT QBasicAtomicInt
{
public:
    volatile int _q_value;

    // Atomic API, implemented in qatomic_XXX.h

    int load() const { return _q_value; }
    int loadAcquire() { return _q_value; }
    void store(int newValue) { _q_value = newValue; }
    void storeRelease(int newValue) { _q_value = newValue; }

    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:
    T * volatile _q_value;

    // Atomic API, implemented in qatomic_XXX.h

    T *load() const { return _q_value; }
    T *loadAcquire() { return _q_value; }
    void store(T *newValue) { _q_value = newValue; }
    void storeRelease(T *newValue) { _q_value = newValue; }

    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);
};

#define Q_BASIC_ATOMIC_INITIALIZER(a) { (a) }

QT_END_NAMESPACE
QT_END_HEADER

#endif // QOLDBASICATOMIC_H