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# qthreadstorage.h

This is the verbatim text of the qthreadstorage.h include file. It is provided only for illustration; the copyright remains with Trolltech.

    /****************************************************************************
    ** $Id: qt/qthreadstorage.h   3.3.4   edited Oct 29 2003 $
    **
    ** ...
    **
    ** Copyright (C) 2003 Trolltech AS.  All rights reserved.
    **
    ** This file is part of the tools module of the Qt GUI Toolkit.
    **
    ** This file may be distributed under the terms of the Q Public License
    ** as defined by Trolltech AS of Norway and appearing in the file
    ** LICENSE.QPL included in the packaging of this file.
    **
    ** This file may be distributed and/or modified under the terms of the
    ** GNU General Public License version 2 as published by the Free Software
    ** Foundation and appearing in the file LICENSE.GPL included in the
    ** packaging of this file.
    **
    ** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
    ** licenses may use this file in accordance with the Qt Commercial License
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    ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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    #ifndef QTHREADSTORAGE_H
    #define QTHREADSTORAGE_H

    #ifdef QT_THREAD_SUPPORT

    #ifndef QT_H
    #include "qglobal.h"
    #endif // QT_H

    class Q_EXPORT QThreadStorageData
    {
    public:
        QThreadStorageData( void (*func)(void *) );
        ~QThreadStorageData();

        void** get() const;
        void** set( void* p );

        static void finish( void** );
        int id;
    };

    template <class T>
    class QThreadStorage
    {
    private:
        QThreadStorageData d;

    #if defined(Q_DISABLE_COPY)
        // disable copy constructor and operator=
        QThreadStorage( const QThreadStorage & );
        QThreadStorage &operator=( const QThreadStorage & );
    #endif // Q_DISABLE_COPY

        static void deleteData( void *x ) { delete (T)x; }

    public:
        inline QThreadStorage() : d( deleteData ) {  }
        inline ~QThreadStorage() { }

        inline bool hasLocalData() const
        { return d.get() != 0; }

        inline T& localData()
        { void **v = d.get(); if ( !v ) v = d.set( 0 ); return *(T*)v; }

        inline T localData() const
        { void **v = d.get(); return ( v ? *(T*)v : 0 ); }

        inline void setLocalData( T t )
        { (void) d.set( t ); }
    };

    #endif // QT_THREAD_SUPPORT

    #endif // QTHREADSTORAGE_H