Qt 4.8
qthreadstorage.h
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41 
42 #ifndef QTHREADSTORAGE_H
43 #define QTHREADSTORAGE_H
44 
45 #include <QtCore/qglobal.h>
46 
47 #ifndef QT_NO_THREAD
48 
50 
52 
53 QT_MODULE(Core)
54 
56 {
57 public:
58  explicit QThreadStorageData(void (*func)(void *));
59  ~QThreadStorageData();
60 
61  void** get() const;
62  void** set(void* p);
63 
64  static void finish(void**);
65  int id;
66 };
67 
68 #if !defined(QT_MOC_CPP)
69 // MOC_SKIP_BEGIN
70 
71 // pointer specialization
72 template <typename T>
73 inline
75 {
76  void **v = d.get();
77  if (!v) v = d.set(0);
78  return *(reinterpret_cast<T**>(v));
79 }
80 
81 template <typename T>
82 inline
84 {
85  void **v = d.get();
86  return v ? *(reinterpret_cast<T**>(v)) : 0;
87 }
88 
89 template <typename T>
90 inline
92 { (void) d.set(*t); }
93 
94 template <typename T>
95 inline
96 void qThreadStorage_deleteData(void *d, T **)
97 { delete static_cast<T *>(d); }
98 
99 // value-based specialization
100 template <typename T>
101 inline
103 {
104  void **v = d.get();
105  if (!v) v = d.set(new T());
106  return *(reinterpret_cast<T*>(*v));
107 }
108 
109 template <typename T>
110 inline
112 {
113  void **v = d.get();
114  return v ? *(reinterpret_cast<T*>(*v)) : T();
115 }
116 
117 template <typename T>
118 inline
120 { (void) d.set(new T(*t)); }
121 
122 template <typename T>
123 inline
124 void qThreadStorage_deleteData(void *d, T *)
125 { delete static_cast<T *>(d); }
126 
127 
128 // MOC_SKIP_END
129 #endif
130 
131 template <class T>
133 {
134 private:
136 
138 
139  static inline void deleteData(void *x)
140  { qThreadStorage_deleteData(x, reinterpret_cast<T*>(0)); }
141 
142 public:
143  inline QThreadStorage() : d(deleteData) { }
144  inline ~QThreadStorage() { }
145 
146  inline bool hasLocalData() const
147  { return d.get() != 0; }
148 
149  inline T& localData()
150  { return qThreadStorage_localData(d, reinterpret_cast<T*>(0)); }
151  inline T localData() const
152  { return qThreadStorage_localData_const(d, reinterpret_cast<T*>(0)); }
153 
154  inline void setLocalData(T t)
155  { qThreadStorage_setLocalData(d, &t); }
156 };
157 
159 
161 
162 #endif // QT_NO_THREAD
163 
164 #endif // QTHREADSTORAGE_H
double d
Definition: qnumeric_p.h:62
T *& qThreadStorage_localData(QThreadStorageData &d, T **)
#define QT_END_NAMESPACE
This macro expands to.
Definition: qglobal.h:90
static void deleteData(void *x)
#define QT_MODULE(x)
Definition: qglobal.h:2783
T localData() const
Returns a copy of the data that was set by the calling thread.
#define QT_BEGIN_HEADER
Definition: qglobal.h:136
QThreadStorageData d
#define Q_DISABLE_COPY(Class)
Disables the use of copy constructors and assignment operators for the given Class.
Definition: qglobal.h:2523
#define QT_BEGIN_NAMESPACE
This macro expands to.
Definition: qglobal.h:89
T & localData()
Returns a reference to the data that was set by the calling thread.
void ** get() const
void ** set(void *p)
bool hasLocalData() const
If T is a pointer type, returns true if the calling thread has non-zero data available.
#define Q_CORE_EXPORT
Definition: qglobal.h:1449
void setLocalData(T t)
Sets the local data for the calling thread to data.
~QThreadStorage()
Destroys the per-thread data storage object.
void qThreadStorage_setLocalData(QThreadStorageData &d, T **t)
QThreadStorage()
Constructs a new per-thread data storage object.
void qThreadStorage_deleteData(void *d, T **)
#define class
T * qThreadStorage_localData_const(const QThreadStorageData &d, T **)
#define QT_END_HEADER
Definition: qglobal.h:137
The QThreadStorage class provides per-thread data storage.