/****************************************************************************
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** Alternatively, this file may be used under the terms of the GNU General
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****************************************************************************/

#ifndef QATOMIC_UNIX_H
#define QATOMIC_UNIX_H

#include <QtCore/qgenericatomic.h>

QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE

#if 0
// silence syncqt warnings
QT_END_NAMESPACE
QT_END_HEADER

#pragma qt_sync_stop_processing
#endif

#define Q_ATOMIC_INT_REFERENCE_COUNTING_IS_NOT_NATIVE
#define Q_ATOMIC_INT_TEST_AND_SET_IS_NOT_NATIVE
#define Q_ATOMIC_INT_FETCH_AND_STORE_IS_NOT_NATIVE
#define Q_ATOMIC_INT_FETCH_AND_ADD_IS_NOT_NATIVE

#define Q_ATOMIC_INT32_IS_SUPPORTED

#define Q_ATOMIC_POINTER_TEST_AND_SET_IS_NOT_NATIVE
#define Q_ATOMIC_POINTER_FETCH_AND_STORE_IS_NOT_NATIVE
#define Q_ATOMIC_POINTER_FETCH_AND_ADD_IS_NOT_NATIVE

template<> struct QAtomicIntegerTraits<int> { enum { IsInteger = 1 }; };

// No definition, needs specialization
template <typename T> struct QAtomicOps;

template <>
struct QAtomicOps<int> : QGenericAtomicOps<QAtomicOps<int> >
{
    typedef int Type;

    static inline bool isTestAndSetNative() { return false; }
    static inline bool isTestAndSetWaitFree() { return false; }
    Q_CORE_EXPORT static bool testAndSetRelaxed(int &_q_value, int expectedValue, int newValue);
};

template <>
struct QAtomicOps<void *> : QGenericAtomicOps<QAtomicOps<void *> >
{
    typedef void *Type;

    static inline bool isTestAndSetNative() { return false; }
    static inline bool isTestAndSetWaitFree() { return false; }
    Q_CORE_EXPORT static bool testAndSetRelaxed(void *&_q_value, void *expectedValue, void *newValue);
};

template <typename T>
struct QAtomicOps<T *> : QGenericAtomicOps<QAtomicOps<T *> >
{
    typedef T *Type;

    // helper to strip cv qualifiers
    static inline void *nocv(const T *p) { return const_cast<void *>(static_cast<const volatile void *>(p)); }

    static inline bool isTestAndSetNative() { return false; }
    static inline bool isTestAndSetWaitFree() { return false; }
    static inline bool testAndSetRelaxed(T *&_q_value, T *expectedValue, T *newValue)
    {
        // forward to the void* specialization
        void *voidp = nocv(_q_value);
        bool returnValue = QAtomicOps<void *>::testAndSetRelaxed(voidp, nocv(expectedValue), nocv(newValue));
        _q_value = reinterpret_cast<T *>(voidp);
        return returnValue;
    }
};

QT_END_NAMESPACE
QT_END_HEADER

#endif // QATOMIC_UNIX_H