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authorTimothy Pearson <kb9vqf@pearsoncomputing.net>2011-07-10 15:24:15 -0500
committerTimothy Pearson <kb9vqf@pearsoncomputing.net>2011-07-10 15:24:15 -0500
commitbd0f3345a938b35ce6a12f6150373b0955b8dd12 (patch)
tree7a520322212d48ebcb9fbe1087e7fca28b76185c /src/tools/qcleanuphandler.h
downloadqt3-bd0f3345a938b35ce6a12f6150373b0955b8dd12.tar.gz
qt3-bd0f3345a938b35ce6a12f6150373b0955b8dd12.zip
Add Qt3 development HEAD version
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+/****************************************************************************
+**
+** ...
+**
+** Copyright (C) 2001-2008 Trolltech ASA. All rights reserved.
+**
+** This file is part of the tools module of the Qt GUI Toolkit.
+**
+** This file may be used under the terms of the GNU General
+** Public License versions 2.0 or 3.0 as published by the Free
+** Software Foundation and appearing in the files LICENSE.GPL2
+** and LICENSE.GPL3 included in the packaging of this file.
+** Alternatively you may (at your option) use any later version
+** of the GNU General Public License if such license has been
+** publicly approved by Trolltech ASA (or its successors, if any)
+** and the KDE Free Qt Foundation.
+**
+** Please review the following information to ensure GNU General
+** Public Licensing requirements will be met:
+** http://trolltech.com/products/qt/licenses/licensing/opensource/.
+** If you are unsure which license is appropriate for your use, please
+** review the following information:
+** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
+** or contact the sales department at sales@trolltech.com.
+**
+** This file may be used under the terms of the Q Public License as
+** defined by Trolltech ASA and appearing in the file LICENSE.QPL
+** included in the packaging of this file. Licensees holding valid Qt
+** Commercial 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 WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
+** herein.
+**
+**********************************************************************/
+
+#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