1/****************************************************************************
2**
3** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
4** Contact: http://www.qt-project.org/legal
5**
6** This file is part of the QtCore module of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:LGPL$
9** Commercial License Usage
10** Licensees holding valid commercial Qt licenses may use this file in
11** accordance with the commercial license agreement provided with the
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15** use the contact form at http://qt.digia.com/contact-us.
16**
17** GNU Lesser General Public License Usage
18** Alternatively, this file may be used under the terms of the GNU Lesser
19** General Public License version 2.1 as published by the Free Software
20** Foundation and appearing in the file LICENSE.LGPL included in the
21** packaging of this file. Please review the following information to
22** ensure the GNU Lesser General Public License version 2.1 requirements
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25** In addition, as a special exception, Digia gives you certain additional
26** rights. These rights are described in the Digia Qt LGPL Exception
27** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
28**
29** GNU General Public License Usage
30** Alternatively, this file may be used under the terms of the GNU
31** General Public License version 3.0 as published by the Free Software
32** Foundation and appearing in the file LICENSE.GPL included in the
33** packaging of this file. Please review the following information to
34** ensure the GNU General Public License version 3.0 requirements will be
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40****************************************************************************/
41
42#ifndef QTHREADSTORAGE_H
43#define QTHREADSTORAGE_H
44
45#include <QtCore/qglobal.h>
46
47#ifndef QT_NO_THREAD
48
49QT_BEGIN_HEADER
50
51QT_BEGIN_NAMESPACE
52
53QT_MODULE(Core)
54
55class Q_CORE_EXPORT QThreadStorageData
56{
57public:
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
72template <typename T>
73inline
74T *&qThreadStorage_localData(QThreadStorageData &d, T **)
75{
76 void **v = d.get();
77 if (!v) v = d.set(0);
78 return *(reinterpret_cast<T**>(v));
79}
80
81template <typename T>
82inline
83T *qThreadStorage_localData_const(const QThreadStorageData &d, T **)
84{
85 void **v = d.get();
86 return v ? *(reinterpret_cast<T**>(v)) : 0;
87}
88
89template <typename T>
90inline
91void qThreadStorage_setLocalData(QThreadStorageData &d, T **t)
92{ (void) d.set(*t); }
93
94template <typename T>
95inline
96void qThreadStorage_deleteData(void *d, T **)
97{ delete static_cast<T *>(d); }
98
99// value-based specialization
100template <typename T>
101inline
102T &qThreadStorage_localData(QThreadStorageData &d, T *)
103{
104 void **v = d.get();
105 if (!v) v = d.set(new T());
106 return *(reinterpret_cast<T*>(*v));
107}
108
109template <typename T>
110inline
111T qThreadStorage_localData_const(const QThreadStorageData &d, T *)
112{
113 void **v = d.get();
114 return v ? *(reinterpret_cast<T*>(*v)) : T();
115}
116
117template <typename T>
118inline
119void qThreadStorage_setLocalData(QThreadStorageData &d, T *t)
120{ (void) d.set(new T(*t)); }
121
122template <typename T>
123inline
124void qThreadStorage_deleteData(void *d, T *)
125{ delete static_cast<T *>(d); }
126
127
128// MOC_SKIP_END
129#endif
130
131template <class T>
132class QThreadStorage
133{
134private:
135 QThreadStorageData d;
136
137 Q_DISABLE_COPY(QThreadStorage)
138
139 static inline void deleteData(void *x)
140 { qThreadStorage_deleteData(x, reinterpret_cast<T*>(0)); }
141
142public:
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
158QT_END_NAMESPACE
159
160QT_END_HEADER
161
162#endif // QT_NO_THREAD
163
164#endif // QTHREADSTORAGE_H
165