1 /****************************************************************************
3 ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
4 ** All rights reserved.
5 ** Contact: Nokia Corporation (qt-info@nokia.com)
7 ** This file is part of the QtDeclarative module of the Qt Toolkit.
9 ** $QT_BEGIN_LICENSE:LGPL$
10 ** GNU Lesser General Public License Usage
11 ** This file may be used under the terms of the GNU Lesser General Public
12 ** License version 2.1 as published by the Free Software Foundation and
13 ** appearing in the file LICENSE.LGPL included in the packaging of this
14 ** file. Please review the following information to ensure the GNU Lesser
15 ** General Public License version 2.1 requirements will be met:
16 ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
18 ** In addition, as a special exception, Nokia gives you certain additional
19 ** rights. These rights are described in the Nokia Qt LGPL Exception
20 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
22 ** GNU General Public License Usage
23 ** Alternatively, this file may be used under the terms of the GNU General
24 ** Public License version 3.0 as published by the Free Software Foundation
25 ** and appearing in the file LICENSE.GPL included in the packaging of this
26 ** file. Please review the following information to ensure the GNU General
27 ** Public License version 3.0 requirements will be met:
28 ** http://www.gnu.org/copyleft/gpl.html.
31 ** Alternatively, this file may be used in accordance with the terms and
32 ** conditions contained in a signed written agreement between you and Nokia.
40 ****************************************************************************/
42 #ifndef QDECLARATIVEREFCOUNT_P_H
43 #define QDECLARATIVEREFCOUNT_P_H
49 // This file is not part of the Qt API. It exists purely as an
50 // implementation detail. This header file may change from version to
51 // version without notice, or even be removed.
56 #include <QtCore/qglobal.h>
57 #include <QtCore/qatomic.h>
63 QT_MODULE(Declarative)
65 class QDeclarativeRefCount
68 inline QDeclarativeRefCount();
69 inline virtual ~QDeclarativeRefCount();
71 inline void release();
74 inline virtual void destroy();
81 class QDeclarativeRefPointer
84 inline QDeclarativeRefPointer();
85 inline QDeclarativeRefPointer(T *);
86 inline QDeclarativeRefPointer(const QDeclarativeRefPointer<T> &);
87 inline ~QDeclarativeRefPointer();
89 inline QDeclarativeRefPointer<T> &operator=(const QDeclarativeRefPointer<T> &o);
90 inline QDeclarativeRefPointer<T> &operator=(T *);
92 inline bool isNull() const { return !o; }
94 inline T* operator->() const { return o; }
95 inline T& operator*() const { return *o; }
96 inline operator T*() const { return o; }
97 inline T* data() const { return o; }
99 inline QDeclarativeRefPointer<T> &take(T *);
105 QDeclarativeRefCount::QDeclarativeRefCount()
110 QDeclarativeRefCount::~QDeclarativeRefCount()
112 Q_ASSERT(refCount.load() == 0);
115 void QDeclarativeRefCount::addref()
117 Q_ASSERT(refCount.load() > 0);
121 void QDeclarativeRefCount::release()
123 Q_ASSERT(refCount.load() > 0);
124 if (!refCount.deref())
128 void QDeclarativeRefCount::destroy()
134 QDeclarativeRefPointer<T>::QDeclarativeRefPointer()
140 QDeclarativeRefPointer<T>::QDeclarativeRefPointer(T *o)
147 QDeclarativeRefPointer<T>::QDeclarativeRefPointer(const QDeclarativeRefPointer<T> &other)
154 QDeclarativeRefPointer<T>::~QDeclarativeRefPointer()
160 QDeclarativeRefPointer<T> &QDeclarativeRefPointer<T>::operator=(const QDeclarativeRefPointer<T> &other)
162 if (other.o) other.o->addref();
169 QDeclarativeRefPointer<T> &QDeclarativeRefPointer<T>::operator=(T *other)
171 if (other) other->addref();
178 Takes ownership of \a other. take() does *not* add a reference, as it assumes ownership
179 of the callers reference of other.
182 QDeclarativeRefPointer<T> &QDeclarativeRefPointer<T>::take(T *other)
193 #endif // QDECLARATIVEREFCOUNT_P_H