- Main Page
- Related Pages
- Modules
- Namespaces
- Classes
- Files
- Directories
- Examples

- File List
- File Members

# qthreadstorage.h

Go to the documentation of this file.

    00001 /****************************************************************************
    00002 **
    00003 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
    00004 ** All rights reserved.
    00005 ** Contact: Nokia Corporation (qt-info@nokia.com)
    00006 **
    00007 ** This file is part of the QtCore module of the Qt Toolkit.
    00008 **
    00009 ** $QT_BEGIN_LICENSE:LGPL$
    00010 ** Commercial Usage
    00011 ** Licensees holding valid Qt Commercial licenses may use this file in
    00012 ** accordance with the Qt Commercial License Agreement provided with the
    00013 ** Software or, alternatively, in accordance with the terms contained in
    00014 ** a written agreement between you and Nokia.
    00015 **
    00016 ** GNU Lesser General Public License Usage
    00017 ** Alternatively, this file may be used under the terms of the GNU Lesser
    00018 ** General Public License version 2.1 as published by the Free Software
    00019 ** Foundation and appearing in the file LICENSE.LGPL included in the
    00020 ** packaging of this file.  Please review the following information to
    00021 ** ensure the GNU Lesser General Public License version 2.1 requirements
    00022 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
    00023 **
    00024 ** In addition, as a special exception, Nokia gives you certain additional
    00025 ** rights.  These rights are described in the Nokia Qt LGPL Exception
    00026 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this module.
    00027 **
    00028 ** GNU General Public License Usage
    00029 ** Alternatively, this file may be used under the terms of the GNU
    00030 ** General Public License version 3.0 as published by the Free Software
    00031 ** Foundation and appearing in the file LICENSE.GPL included in the
    00032 ** packaging of this file.  Please review the following information to
    00033 ** ensure the GNU General Public License version 3.0 requirements will be
    00034 ** met: http://www.gnu.org/copyleft/gpl.html.
    00035 **
    00036 ** If you have questions regarding the use of this file, please contact
    00037 ** Nokia at qt-info@nokia.com.
    00038 ** $QT_END_LICENSE$
    00039 **
    00040 ****************************************************************************/
    00041
    00042 #ifndef QTHREADSTORAGE_H
    00043 #define QTHREADSTORAGE_H
    00044
    00045 #include <QtCore/qglobal.h>
    00046
    00047 #ifndef QT_NO_THREAD
    00048
    00049 QT_BEGIN_HEADER
    00050
    00051 QT_BEGIN_NAMESPACE
    00052
    00053 QT_MODULE(Core)
    00054
    00055 class Q_CORE_EXPORT QThreadStorageData
    00056 {
    00057 public:
    00058     explicit QThreadStorageData(void (*func)(void *));
    00059     ~QThreadStorageData();
    00060
    00061     void** get() const;
    00062     void** set(void* p);
    00063
    00064     static void finish(void**);
    00065     int id;
    00066 };
    00067
    00068 #if !defined(QT_MOC_CPP)
    00069 // MOC_SKIP_BEGIN
    00070
    00071 // pointer specialization
    00072 template <typename T>
    00073 inline
    00074 T *&qThreadStorage_localData(QThreadStorageData &d, T **)
    00075 {
    00076     void **v = d.get();
    00077     if (!v) v = d.set(0);
    00078     return *(reinterpret_cast<T**>(v));
    00079 }
    00080
    00081 template <typename T>
    00082 inline
    00083 T *qThreadStorage_localData_const(const QThreadStorageData &d, T **)
    00084 {
    00085     void **v = d.get();
    00086     return v ? *(reinterpret_cast<T**>(v)) : 0;
    00087 }
    00088
    00089 template <typename T>
    00090 inline
    00091 void qThreadStorage_setLocalData(QThreadStorageData &d, T **t)
    00092 { (void) d.set(*t); }
    00093
    00094 #ifndef QT_NO_PARTIAL_TEMPLATE_SPECIALIZATION
    00095
    00096 // value-based specialization
    00097 template <typename T>
    00098 inline
    00099 T &qThreadStorage_localData(QThreadStorageData &d, T *)
    00100 {
    00101     void **v = d.get();
    00102     if (!v) v = d.set(new T());
    00103     return *(reinterpret_cast<T*>(*v));
    00104 }
    00105
    00106 template <typename T>
    00107 inline
    00108 T qThreadStorage_localData_const(const QThreadStorageData &d, T *)
    00109 {
    00110     void **v = d.get();
    00111     return v ? *(reinterpret_cast<T*>(*v)) : T();
    00112 }
    00113
    00114 template <typename T>
    00115 inline
    00116 void qThreadStorage_setLocalData(QThreadStorageData &d, T *t)
    00117 { (void) d.set(new T(*t)); }
    00118
    00119 #endif // QT_NO_PARTIAL_TEMPLATE_SPECIALIZATION
    00120
    00121 // MOC_SKIP_END
    00122 #endif
    00123
    00124 template <class T>
    00125 class QThreadStorage
    00126 {
    00127 private:
    00128     QThreadStorageData d;
    00129
    00130     Q_DISABLE_COPY(QThreadStorage)
    00131
    00132     static inline void deleteData(void *x)
    00133     { delete static_cast<T>(x); }
    00134
    00135 public:
    00136     inline QThreadStorage() : d(deleteData) { }
    00137     inline ~QThreadStorage() { }
    00138
    00139     inline bool hasLocalData() const
    00140     { return d.get() != 0; }
    00141
    00142     inline T& localData()
    00143     { return qThreadStorage_localData(d, reinterpret_cast<T*>(0)); }
    00144     inline T localData() const
    00145     { return qThreadStorage_localData_const(d, reinterpret_cast<T*>(0)); }
    00146
    00147     inline void setLocalData(T t)
    00148     { qThreadStorage_setLocalData(d, &t); }
    00149 };
    00150
    00151 QT_END_NAMESPACE
    00152
    00153 QT_END_HEADER
    00154
    00155 #endif // QT_NO_THREAD
    00156
    00157 #endif // QTHREADSTORAGE_H