source: trunk/src/corelib/thread/qatomic.h@ 492

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#ifndef QATOMIC_H
#define QATOMIC_H

#include <QtCore/qglobal.h>
#include <QtCore/qbasicatomic.h>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Core)

// High-level atomic integer operations
class Q_CORE_EXPORT QAtomicInt : public QBasicAtomicInt
{
public:
    inline QAtomicInt(int value = 0)
    {
#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;
    }
    inline QAtomicInt(const QAtomicInt &other)
    {
#ifdef QT_ARCH_PARISC
        this->_q_lock[0] = this->_q_lock[1] = this->_q_lock[2] = this->_q_lock[3] = -1;
#endif
        _q_value = other._q_value;
    }

    inline QAtomicInt &operator=(int value)
    {
        (void) QBasicAtomicInt::operator=(value);
        return *this;
    }

    inline QAtomicInt &operator=(const QAtomicInt &other)
    {
        (void) QBasicAtomicInt::operator=(other);
        return *this;
    }

#ifdef qdoc
    bool operator==(int value) const;
    bool operator!=(int value) const;
    bool operator!() const;
    operator int() const;

    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);
#endif
};

// High-level atomic pointer operations
template <typename T>
class QAtomicPointer : public QBasicAtomicPointer<T>