| 1 | // Copyright (C) 2020 Klaralvdalens Datakonsult AB (KDAB). |
|---|
| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
|---|
| 3 | #ifndef QT3DCORE_QHANDLE_P_H |
|---|
| 4 | #define QT3DCORE_QHANDLE_P_H |
|---|
| 5 | |
|---|
| 6 | // |
|---|
| 7 | // W A R N I N G |
|---|
| 8 | // ------------- |
|---|
| 9 | // |
|---|
| 10 | // This file is not part of the Qt API. It exists for the convenience |
|---|
| 11 | // of other Qt classes. This header file may change from version to |
|---|
| 12 | // version without notice, or even be removed. |
|---|
| 13 | // |
|---|
| 14 | // We mean it. |
|---|
| 15 | // |
|---|
| 16 | |
|---|
| 17 | #include <Qt3DCore/qt3dcore_global.h> |
|---|
| 18 | #include <QtCore/QDebug> |
|---|
| 19 | #include <QtCore/qhashfunctions.h> |
|---|
| 20 | #include <private/qglobal_p.h> |
|---|
| 21 | |
|---|
| 22 | QT_BEGIN_NAMESPACE |
|---|
| 23 | |
|---|
| 24 | namespace Qt3DCore { |
|---|
| 25 | |
|---|
| 26 | template <typename T> |
|---|
| 27 | class QHandle |
|---|
| 28 | { |
|---|
| 29 | public: |
|---|
| 30 | struct Data { |
|---|
| 31 | union { |
|---|
| 32 | quintptr counter; |
|---|
| 33 | Data *nextFree; |
|---|
| 34 | }; |
|---|
| 35 | }; |
|---|
| 36 | QHandle() |
|---|
| 37 | : d(nullptr), |
|---|
| 38 | counter(0) |
|---|
| 39 | {} |
|---|
| 40 | QHandle(Data *d) |
|---|
| 41 | : d(d), |
|---|
| 42 | counter(d->counter) |
|---|
| 43 | { |
|---|
| 44 | } |
|---|
| 45 | QHandle(const QHandle &other) |
|---|
| 46 | : d(other.d), |
|---|
| 47 | counter(other.counter) |
|---|
| 48 | { |
|---|
| 49 | } |
|---|
| 50 | QHandle &operator=(const QHandle &other) |
|---|
| 51 | { |
|---|
| 52 | d = other.d; |
|---|
| 53 | counter = other.counter; |
|---|
| 54 | return *this; |
|---|
| 55 | } |
|---|
| 56 | |
|---|
| 57 | inline T *operator->() const; |
|---|
| 58 | T *data() const; |
|---|
| 59 | |
|---|
| 60 | quintptr handle() const { return reinterpret_cast<quintptr>(d); } |
|---|
| 61 | bool isNull() const { return !d; } |
|---|
| 62 | |
|---|
| 63 | Data *data_ptr() const { return d; } |
|---|
| 64 | |
|---|
| 65 | bool operator==(const QHandle &other) const { return d == other.d && counter == other.counter; } |
|---|
| 66 | bool operator!=(const QHandle &other) const { return !operator==(other); } |
|---|
| 67 | private: |
|---|
| 68 | Data *d; |
|---|
| 69 | quintptr counter; |
|---|
| 70 | }; |
|---|
| 71 | |
|---|
| 72 | |
|---|
| 73 | template <typename T> |
|---|
| 74 | QDebug operator<<(QDebug dbg, const QHandle<T> &h) |
|---|
| 75 | { |
|---|
| 76 | QDebugStateSaver saver(dbg); |
|---|
| 77 | QString binNumber = QString::number(h.handle(), 2).rightJustified(32, QChar::fromLatin1(c: '0')); |
|---|
| 78 | dbg.nospace() << " m_handle = " << h.handle() |
|---|
| 79 | << " = " << binNumber; |
|---|
| 80 | return dbg; |
|---|
| 81 | } |
|---|
| 82 | |
|---|
| 83 | template <typename T> |
|---|
| 84 | size_t qHash(const QHandle<T> &h, size_t seed) |
|---|
| 85 | { |
|---|
| 86 | using QT_PREPEND_NAMESPACE(qHash); |
|---|
| 87 | return qHash(h.handle(), seed); |
|---|
| 88 | } |
|---|
| 89 | |
|---|
| 90 | template <typename T> |
|---|
| 91 | size_t qHash(const QHandle<T> &h) |
|---|
| 92 | { |
|---|
| 93 | using QT_PREPEND_NAMESPACE(qHash); |
|---|
| 94 | return qHash(h.handle()); |
|---|
| 95 | } |
|---|
| 96 | |
|---|
| 97 | } // Qt3DCore |
|---|
| 98 | |
|---|
| 99 | // simpler than fighting the Q_DECLARE_TYPEINFO macro, use QString as a dummy to get movable semantics |
|---|
| 100 | template <typename T> |
|---|
| 101 | class QTypeInfo<Qt3DCore::QHandle<T> > |
|---|
| 102 | : public QTypeInfoMerger<Qt3DCore::QHandle<T>, QString> {}; |
|---|
| 103 | |
|---|
| 104 | QT_END_NAMESPACE |
|---|
| 105 | |
|---|
| 106 | #endif // QT3DCORE_QRHANDLE_H |
|---|
| 107 | |
|---|
