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39
40//
41// W A R N I N G
42// -------------
43//
44// This file is not part of the Qt API. It exists for the convenience
45// of internal files. This header file may change from version to version
46// without notice, or even be removed.
47//
48// We mean it.
49//
50
51#include <QtCore/private/qglobal_p.h>
52
53#ifndef QSCOPEDPOINTER_P_H
54#define QSCOPEDPOINTER_P_H
55
56#include "QtCore/qscopedpointer.h"
57
58QT_BEGIN_NAMESPACE
59
60
61/* Internal helper class - exposes the data through data_ptr (legacy from QShared).
62 Required for some internal Qt classes, do not use otherwise. */
63template <typename T, typename Cleanup = QScopedPointerDeleter<T> >
64class QCustomScopedPointer : public QScopedPointer<T, Cleanup>
65{
66public:
67 explicit inline QCustomScopedPointer(T *p = nullptr)
68 : QScopedPointer<T, Cleanup>(p)
69 {
70 }
71
72 inline T *&data_ptr()
73 {
74 return this->d;
75 }
76
77 inline bool operator==(const QCustomScopedPointer<T, Cleanup> &other) const
78 {
79 return this->d == other.d;
80 }
81
82 inline bool operator!=(const QCustomScopedPointer<T, Cleanup> &other) const
83 {
84 return this->d != other.d;
85 }
86
87private:
88 Q_DISABLE_COPY(QCustomScopedPointer)
89};
90
91/* Internal helper class - a handler for QShared* classes, to be used in QCustomScopedPointer */
92template <typename T>
93class QScopedPointerSharedDeleter
94{
95public:
96 static inline void cleanup(T *d)
97 {
98 if (d && !d->ref.deref())
99 delete d;
100 }
101};
102
103/* Internal.
104 This class is basically a scoped pointer pointing to a ref-counted object
105 */
106template <typename T>
107class QScopedSharedPointer : public QCustomScopedPointer<T, QScopedPointerSharedDeleter<T> >
108{
109public:
110 explicit inline QScopedSharedPointer(T *p = nullptr)
111 : QCustomScopedPointer<T, QScopedPointerSharedDeleter<T> >(p)
112 {
113 }
114
115 inline void detach()
116 {
117 qAtomicDetach(this->d);
118 }
119
120 inline void assign(T *other)
121 {
122 if (this->d == other)
123 return;
124 if (other)
125 other->ref.ref();
126 T *oldD = this->d;
127 this->d = other;
128 QScopedPointerSharedDeleter<T>::cleanup(oldD);
129 }
130
131 inline bool operator==(const QScopedSharedPointer<T> &other) const
132 {
133 return this->d == other.d;
134 }
135
136 inline bool operator!=(const QScopedSharedPointer<T> &other) const
137 {
138 return this->d != other.d;
139 }
140
141private:
142 Q_DISABLE_COPY(QScopedSharedPointer)
143};
144
145
146QT_END_NAMESPACE
147
148#endif
149