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| |
| #ifndef QT3DCORE_QHANDLE_P_H |
| #define QT3DCORE_QHANDLE_P_H |
| |
| // |
| // W A R N I N G |
| // ------------- |
| // |
| // This file is not part of the Qt API. It exists for the convenience |
| // of other Qt classes. This header file may change from version to |
| // version without notice, or even be removed. |
| // |
| // We mean it. |
| // |
| |
| #include <Qt3DCore/qt3dcore_global.h> |
| #include <QtCore/QDebug> |
| #include <QtCore/qhashfunctions.h> |
| |
| QT_BEGIN_NAMESPACE |
| |
| namespace Qt3DCore { |
| |
| template <typename T> |
| class QHandle |
| { |
| public: |
| struct Data { |
| union { |
| quintptr counter; |
| Data *nextFree; |
| }; |
| }; |
| QHandle() |
| : d(nullptr), |
| counter(0) |
| {} |
| QHandle(Data *d) |
| : d(d), |
| counter(d->counter) |
| { |
| } |
| QHandle(const QHandle &other) |
| : d(other.d), |
| counter(other.counter) |
| { |
| } |
| QHandle &operator=(const QHandle &other) |
| { |
| d = other.d; |
| counter = other.counter; |
| return *this; |
| } |
| |
| inline T *operator->() const; |
| T *data() const; |
| |
| quintptr handle() const { return reinterpret_cast<quintptr>(d); } |
| bool isNull() const { return !d; } |
| |
| Data *data_ptr() const { return d; } |
| |
| bool operator==(const QHandle &other) const { return d == other.d && counter == other.counter; } |
| bool operator!=(const QHandle &other) const { return !operator==(other); } |
| private: |
| Data *d; |
| quintptr counter; |
| }; |
| |
| |
| template <typename T> |
| QDebug operator<<(QDebug dbg, const QHandle<T> &h) |
| { |
| QDebugStateSaver saver(dbg); |
| QString binNumber = QString::number(h.handle(), 2).rightJustified(32, QChar::fromLatin1('0')); |
| dbg.nospace() << " m_handle = " << h.handle() |
| << " = " << binNumber; |
| return dbg; |
| } |
| |
| template <typename T> |
| uint qHash(const QHandle<T> &h, uint seed) |
| { |
| using QT_PREPEND_NAMESPACE(qHash); |
| return qHash(h.handle(), seed); |
| } |
| |
| } // Qt3DCore |
| |
| // simpler than fighting the Q_DECLARE_TYPEINFO macro, use QString as a dummy to get movable semantics |
| template <typename T> |
| class QTypeInfo<Qt3DCore::QHandle<T> > |
| : public QTypeInfoMerger<Qt3DCore::QHandle<T>, QString> {}; |
| |
| QT_END_NAMESPACE |
| |
| #endif // QT3DCORE_QRHANDLE_H |