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src/qt/include/qptrqueue.h
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00001 /****************************************************************************
00002 ** $Id: qt/qptrqueue.h   3.3.8   edited Jan 11 14:38 $
00003 **
00004 ** Definition of QPtrQueue template/macro class
00005 **
00006 ** Created : 920917
00007 **
00008 ** Copyright (C) 1992-2007 Trolltech ASA.  All rights reserved.
00009 **
00010 ** This file is part of the tools module of the Qt GUI Toolkit.
00011 **
00012 ** This file may be distributed under the terms of the Q Public License
00013 ** as defined by Trolltech ASA of Norway and appearing in the file
00014 ** LICENSE.QPL included in the packaging of this file.
00015 **
00016 ** This file may be distributed and/or modified under the terms of the
00017 ** GNU General Public License version 2 as published by the Free Software
00018 ** Foundation and appearing in the file LICENSE.GPL included in the
00019 ** packaging of this file.
00020 **
00021 ** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
00022 ** licenses may use this file in accordance with the Qt Commercial License
00023 ** Agreement provided with the Software.
00024 **
00025 ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
00026 ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
00027 **
00028 ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
00029 **   information about Qt Commercial License Agreements.
00030 ** See http://www.trolltech.com/qpl/ for QPL licensing information.
00031 ** See http://www.trolltech.com/gpl/ for GPL licensing information.
00032 **
00033 ** Contact info@trolltech.com if any conditions of this licensing are
00034 ** not clear to you.
00035 **
00036 **********************************************************************/
00037 
00038 #ifndef QPTRQUEUE_H
00039 #define QPTRQUEUE_H
00040 
00041 #ifndef QT_H
00042 #include "qglist.h"
00043 #endif // QT_H
00044 
00045 template<class type>
00046 class QPtrQueue : protected QGList
00047 {
00048 public:
00049     QPtrQueue()                         {}
00050     QPtrQueue( const QPtrQueue<type> &q ) : QGList(q) {}
00051     ~QPtrQueue()                        { clear(); }
00052     QPtrQueue<type>& operator=(const QPtrQueue<type> &q)
00053                         { return (QPtrQueue<type>&)QGList::operator=(q); }
00054     bool  autoDelete() const            { return QPtrCollection::autoDelete(); }
00055     void  setAutoDelete( bool del )     { QPtrCollection::setAutoDelete(del); }
00056     uint  count()   const               { return QGList::count(); }
00057     bool  isEmpty() const               { return QGList::count() == 0; }
00058     void  enqueue( const type *d )      { QGList::append(Item(d)); }
00059     type *dequeue()                     { return (type *)QGList::takeFirst();}
00060     bool  remove()                      { return QGList::removeFirst(); }
00061     void  clear()                       { QGList::clear(); }
00062     type *head()    const               { return (type *)QGList::cfirst(); }
00063           operator type *() const       { return (type *)QGList::cfirst(); }
00064     type *current() const               { return (type *)QGList::cfirst(); }
00065 
00066 #ifdef Q_QDOC
00067 protected:
00068     virtual QDataStream& read( QDataStream&, QPtrCollection::Item& );
00069     virtual QDataStream& write( QDataStream&, QPtrCollection::Item ) const;
00070 #endif
00071 
00072 private:
00073     void  deleteItem( Item d );
00074 };
00075 
00076 #if !defined(Q_BROKEN_TEMPLATE_SPECIALIZATION)
00077 template<> inline void QPtrQueue<void>::deleteItem( QPtrCollection::Item )
00078 {
00079 }
00080 #endif
00081 
00082 template<class type> inline void QPtrQueue<type>::deleteItem( QPtrCollection::Item d )
00083 {
00084     if ( del_item ) delete (type *)d;
00085 }
00086 
00087 #ifndef QT_NO_COMPAT
00088 #define QQueue QPtrQueue
00089 #endif
00090 
00091 #endif // QPTRQUEUE_H
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