Qt 4.8
qscopedpointer_p.h
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41 
42 //
43 // W A R N I N G
44 // -------------
45 //
46 // This file is not part of the Qt API. It exists for the convenience
47 // of internal files. This header file may change from version to version
48 // without notice, or even be removed.
49 //
50 // We mean it.
51 //
52 
53 #ifndef QSCOPEDPOINTER_P_H
54 #define QSCOPEDPOINTER_P_H
55 
56 #include "QtCore/qscopedpointer.h"
57 
60 QT_MODULE(Core)
61 
62 
63 /* Internal helper class - exposes the data through data_ptr (legacy from QShared).
64  Required for some internal Qt classes, do not use otherwise. */
65 template <typename T, typename Cleanup = QScopedPointerDeleter<T> >
66 class QCustomScopedPointer : public QScopedPointer<T, Cleanup>
67 {
68 public:
69  explicit inline QCustomScopedPointer(T *p = 0)
70  : QScopedPointer<T, Cleanup>(p)
71  {
72  }
73 
74  inline T *&data_ptr()
75  {
76  return this->d;
77  }
78 
79  inline bool operator==(const QCustomScopedPointer<T, Cleanup> &other) const
80  {
81  return this->d == other.d;
82  }
83 
84  inline bool operator!=(const QCustomScopedPointer<T, Cleanup> &other) const
85  {
86  return this->d != other.d;
87  }
88 
89 private:
91 };
92 
93 /* Internal helper class - a handler for QShared* classes, to be used in QCustomScopedPointer */
94 template <typename T>
96 {
97 public:
98  static inline void cleanup(T *d)
99  {
100  if (d && !d->ref.deref())
101  delete d;
102  }
103 };
104 
105 /* Internal.
106  This class is basically a scoped pointer pointing to a ref-counted object
107  */
108 template <typename T>
109 class QScopedSharedPointer : public QCustomScopedPointer<T, QScopedPointerSharedDeleter<T> >
110 {
111 public:
112  explicit inline QScopedSharedPointer(T *p = 0)
114  {
115  }
116 
117  inline void detach()
118  {
119  qAtomicDetach(this->d);
120  }
121 
122  inline void assign(T *other)
123  {
124  if (this->d == other)
125  return;
126  if (other)
127  other->ref.ref();
128  T *oldD = this->d;
129  this->d = other;
131  }
132 
133  inline bool operator==(const QScopedSharedPointer<T> &other) const
134  {
135  return this->d == other.d;
136  }
137 
138  inline bool operator!=(const QScopedSharedPointer<T> &other) const
139  {
140  return this->d != other.d;
141  }
142 
143 private:
145 };
146 
147 
150 
151 #endif
void qAtomicDetach(T *&d)
This is a helper for the detach method of implicitly shared classes.
Definition: qatomic.h:214
#define QT_END_NAMESPACE
This macro expands to.
Definition: qglobal.h:90
#define QT_MODULE(x)
Definition: qglobal.h:2783
bool operator==(const QCustomScopedPointer< T, Cleanup > &other) const
#define QT_BEGIN_HEADER
Definition: qglobal.h:136
#define Q_DISABLE_COPY(Class)
Disables the use of copy constructors and assignment operators for the given Class.
Definition: qglobal.h:2523
bool operator==(const QScopedSharedPointer< T > &other) const
The QScopedPointer class stores a pointer to a dynamically allocated object, and deletes it upon dest...
#define QT_BEGIN_NAMESPACE
This macro expands to.
Definition: qglobal.h:89
bool operator!=(const QCustomScopedPointer< T, Cleanup > &other) const
bool operator!=(const QScopedSharedPointer< T > &other) const
#define QT_END_HEADER
Definition: qglobal.h:137