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-/****************************************************************************
-**
-** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: http://www.qt-project.org/
-**
-** 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 QDECLARATIVEREFCOUNT_P_H
-#define QDECLARATIVEREFCOUNT_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>
-#include <QtCore/qatomic.h>
-
-QT_BEGIN_HEADER
-
-QT_BEGIN_NAMESPACE
-
-
-class QDeclarativeRefCount
-{
-public:
- inline QDeclarativeRefCount();
- inline virtual ~QDeclarativeRefCount();
- inline void addref();
- inline void release();
-
-protected:
- inline virtual void destroy();
-
-private:
- QAtomicInt refCount;
-};
-
-template<class T>
-class QDeclarativeRefPointer
-{
-public:
- inline QDeclarativeRefPointer();
- inline QDeclarativeRefPointer(T *);
- inline QDeclarativeRefPointer(const QDeclarativeRefPointer<T> &);
- inline ~QDeclarativeRefPointer();
-
- inline QDeclarativeRefPointer<T> &operator=(const QDeclarativeRefPointer<T> &o);
- inline QDeclarativeRefPointer<T> &operator=(T *);
-
- inline bool isNull() const { return !o; }
-
- inline T* operator->() const { return o; }
- inline T& operator*() const { return *o; }
- inline operator T*() const { return o; }
- inline T* data() const { return o; }
-
- inline QDeclarativeRefPointer<T> &take(T *);
-
-private:
- T *o;
-};
-
-QDeclarativeRefCount::QDeclarativeRefCount()
-: refCount(1)
-{
-}
-
-QDeclarativeRefCount::~QDeclarativeRefCount()
-{
- Q_ASSERT(refCount.load() == 0);
-}
-
-void QDeclarativeRefCount::addref()
-{
- Q_ASSERT(refCount.load() > 0);
- refCount.ref();
-}
-
-void QDeclarativeRefCount::release()
-{
- Q_ASSERT(refCount.load() > 0);
- if (!refCount.deref())
- destroy();
-}
-
-void QDeclarativeRefCount::destroy()
-{
- delete this;
-}
-
-template<class T>
-QDeclarativeRefPointer<T>::QDeclarativeRefPointer()
-: o(0)
-{
-}
-
-template<class T>
-QDeclarativeRefPointer<T>::QDeclarativeRefPointer(T *o)
-: o(o)
-{
- if (o) o->addref();
-}
-
-template<class T>
-QDeclarativeRefPointer<T>::QDeclarativeRefPointer(const QDeclarativeRefPointer<T> &other)
-: o(other.o)
-{
- if (o) o->addref();
-}
-
-template<class T>
-QDeclarativeRefPointer<T>::~QDeclarativeRefPointer()
-{
- if (o) o->release();
-}
-
-template<class T>
-QDeclarativeRefPointer<T> &QDeclarativeRefPointer<T>::operator=(const QDeclarativeRefPointer<T> &other)
-{
- if (other.o) other.o->addref();
- if (o) o->release();
- o = other.o;
- return *this;
-}
-
-template<class T>
-QDeclarativeRefPointer<T> &QDeclarativeRefPointer<T>::operator=(T *other)
-{
- if (other) other->addref();
- if (o) o->release();
- o = other;
- return *this;
-}
-
-/*!
-Takes ownership of \a other. take() does *not* add a reference, as it assumes ownership
-of the callers reference of other.
-*/
-template<class T>
-QDeclarativeRefPointer<T> &QDeclarativeRefPointer<T>::take(T *other)
-{
- if (o) o->release();
- o = other;
- return *this;
-}
-
-QT_END_NAMESPACE
-
-QT_END_HEADER
-
-#endif // QDECLARATIVEREFCOUNT_P_H