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src/qt/src/tools/qthreadstorage.h
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00001 /****************************************************************************
00002 ** $Id: qt/qthreadstorage.h   3.3.8   edited Jan 11 14:46 $
00003 **
00004 ** ...
00005 **
00006 ** Copyright (C) 2005-2007 Trolltech ASA.  All rights reserved.
00007 **
00008 ** This file is part of the tools module of the Qt GUI Toolkit.
00009 **
00010 ** This file may be distributed under the terms of the Q Public License
00011 ** as defined by Trolltech ASA of Norway and appearing in the file
00012 ** LICENSE.QPL included in the packaging of this file.
00013 **
00014 ** This file may be distributed and/or modified under the terms of the
00015 ** GNU General Public License version 2 as published by the Free Software
00016 ** Foundation and appearing in the file LICENSE.GPL included in the
00017 ** packaging of this file.
00018 **
00019 ** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
00020 ** licenses may use this file in accordance with the Qt Commercial License
00021 ** Agreement provided with the Software.
00022 **
00023 ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
00024 ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
00025 **
00026 ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
00027 **   information about Qt Commercial License Agreements.
00028 ** See http://www.trolltech.com/qpl/ for QPL licensing information.
00029 ** See http://www.trolltech.com/gpl/ for GPL licensing information.
00030 **
00031 ** Contact info@trolltech.com if any conditions of this licensing are
00032 ** not clear to you.
00033 **
00034 **********************************************************************/
00035 
00036 #ifndef QTHREADSTORAGE_H
00037 #define QTHREADSTORAGE_H
00038 
00039 #ifdef QT_THREAD_SUPPORT
00040 
00041 #ifndef QT_H
00042 #include "qglobal.h"
00043 #endif // QT_H
00044 
00045 class Q_EXPORT QThreadStorageData
00046 {
00047 public:
00048     QThreadStorageData( void (*func)(void *) );
00049     ~QThreadStorageData();
00050 
00051     void** get() const;
00052     void** set( void* p );
00053 
00054     static void finish( void** );
00055     int id;
00056 };
00057 
00058 
00059 template <class T>
00060 class QThreadStorage
00061 {
00062 private:
00063     QThreadStorageData d;
00064 
00065 #if defined(Q_DISABLE_COPY)
00066     // disable copy constructor and operator=
00067     QThreadStorage( const QThreadStorage & );
00068     QThreadStorage &operator=( const QThreadStorage & );
00069 #endif // Q_DISABLE_COPY
00070 
00071     static void deleteData( void *x ) { delete (T)x; }
00072 
00073 public:
00074     inline QThreadStorage() : d( deleteData ) {  }
00075     inline ~QThreadStorage() { }
00076 
00077     inline bool hasLocalData() const
00078     { return d.get() != 0; }
00079 
00080     inline T& localData()
00081     { void **v = d.get(); if ( !v ) v = d.set( 0 ); return *(T*)v; }
00082 
00083     inline T localData() const
00084     { void **v = d.get(); return ( v ? *(T*)v : 0 ); }
00085 
00086     inline void setLocalData( T t )
00087     { (void) d.set( t ); }
00088 };
00089 
00090 #endif // QT_THREAD_SUPPORT
00091 
00092 #endif // QTHREADSTORAGE_H
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