/**************************************************************************** ** $Id$ ** ** ... ** ** 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