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/****************************************************************************
** $Id$
**
** ...
**
** Copyright (C) 2001-2002 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
** Agreement provided with the Software.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
** information about Qt Commercial License Agreements.
** See http://www.trolltech.com/qpl/ for QPL licensing information.
** See http://www.trolltech.com/gpl/ for GPL licensing information.
**
** Contact info@trolltech.com if any conditions of this licensing are
** not clear to you.
**
**********************************************************************/
#ifndef QCLEANUPHANDLER_H
#define QCLEANUPHANDLER_H
#ifndef QT_H
#include <qptrlist.h>
#endif // QT_H
template<class Type>
class QCleanupHandler
{
public:
QCleanupHandler() : cleanupObjects( 0 ) {}
~QCleanupHandler() { clear(); }
Type* add( Type **object ) {
if ( !cleanupObjects )
cleanupObjects = new QPtrList<Type*>;
cleanupObjects->insert( 0, object );
return *object;
}
void remove( Type **object ) {
if ( !cleanupObjects )
return;
if ( cleanupObjects->findRef( object ) >= 0 )
(void) cleanupObjects->take();
}
bool isEmpty() const {
return cleanupObjects ? cleanupObjects->isEmpty() : TRUE;
}
void clear() {
if ( !cleanupObjects )
return;
QPtrListIterator<Type*> it( *cleanupObjects );
Type **object;
while ( ( object = it.current() ) ) {
delete *object;
*object = 0;
cleanupObjects->remove( object );
}
delete cleanupObjects;
cleanupObjects = 0;
}
private:
QPtrList<Type*> *cleanupObjects;
};
template<class Type>
class QSingleCleanupHandler
{
public:
QSingleCleanupHandler() : object( 0 ) {}
~QSingleCleanupHandler() {
if ( object ) {
delete *object;
*object = 0;
}
}
Type* set( Type **o ) {
object = o;
return *object;
}
void reset() { object = 0; }
private:
Type **object;
};
template<class Type>
class QSharedCleanupHandler
{
public:
QSharedCleanupHandler() : object( 0 ) {}
~QSharedCleanupHandler() {
if ( object ) {
if ( (*object)->deref() )
delete *object;
*object = 0;
}
}
Type* set( Type **o ) {
object = o;
return *object;
}
void reset() { object = 0; }
private:
Type **object;
};
#endif //QCLEANUPHANDLER_H
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