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Diffstat (limited to 'src/declarative/qml/ftw/qdeletewatcher_p.h')
-rw-r--r-- | src/declarative/qml/ftw/qdeletewatcher_p.h | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/src/declarative/qml/ftw/qdeletewatcher_p.h b/src/declarative/qml/ftw/qdeletewatcher_p.h new file mode 100644 index 0000000000..34ef46bc17 --- /dev/null +++ b/src/declarative/qml/ftw/qdeletewatcher_p.h @@ -0,0 +1,113 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the QtDeclarative module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** GNU Lesser General Public License Usage +** This file may be used under the terms of the GNU Lesser General Public +** License version 2.1 as published by the Free Software Foundation and +** appearing in the file LICENSE.LGPL included in the packaging of this +** file. Please review the following information to ensure the GNU Lesser +** General Public License version 2.1 requirements will be met: +** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU General +** Public License version 3.0 as published by the Free Software Foundation +** and appearing in the file LICENSE.GPL included in the packaging of this +** file. Please review the following information to ensure the GNU General +** Public License version 3.0 requirements will be met: +** http://www.gnu.org/copyleft/gpl.html. +** +** Other Usage +** Alternatively, this file may be used in accordance with the terms and +** conditions contained in a signed written agreement between you and Nokia. +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef QDELETEWATCHER_P_H +#define QDELETEWATCHER_P_H + +// +// W A R N I N G +// ------------- +// +// This file is not part of the Qt API. It exists purely as an +// implementation detail. This header file may change from version to +// version without notice, or even be removed. +// +// We mean it. +// + +#include <QtCore/qglobal.h> + +QT_BEGIN_NAMESPACE + +class QDeleteWatchable +{ +public: + inline QDeleteWatchable(); + inline ~QDeleteWatchable(); +private: + friend class QDeleteWatcher; + bool *_w; +}; + +class QDeleteWatcher { +public: + inline QDeleteWatcher(QDeleteWatchable *data); + inline ~QDeleteWatcher(); + inline bool wasDeleted() const; +private: + void *operator new(size_t); + bool *_w; + bool _s; + QDeleteWatchable *m_d; +}; + +QDeleteWatchable::QDeleteWatchable() +: _w(0) +{ +} + +QDeleteWatchable::~QDeleteWatchable() +{ + if (_w) *_w = true; +} + +QDeleteWatcher::QDeleteWatcher(QDeleteWatchable *data) +: _s(false), m_d(data) +{ + if (!m_d->_w) + m_d->_w = &_s; + _w = m_d->_w; +} + +QDeleteWatcher::~QDeleteWatcher() +{ + if (false == *_w && &_s == m_d->_w) + m_d->_w = 0; +} + +bool QDeleteWatcher::wasDeleted() const +{ + return *_w; +} + +QT_END_NAMESPACE + +#endif // QDELETEWATCHER_P_H |