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/****************************************************************************
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**
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** Copyright (C) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the Qt Script Generator project on Qt Labs.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** No Commercial Usage
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** This file contains pre-release code and may not be distributed.
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** You may use this file in accordance with the terms and conditions
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** contained in the Technology Preview License Agreement accompanying
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** this package.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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**
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**
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef CODEMODEL_POINTER_H
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#define CODEMODEL_POINTER_H
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#include <QtCore/QSharedData>
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// Since the atomic API changed in 4.4 we need to hack a little here
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// to make it work with both 4.3 and 4.4 until that is not required
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#if QT_VERSION >= 0x040400
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# include <QtCore/qatomic.h>
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template <class T> class CodeModelPointer: public QAtomicPointer<T>
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#else
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template <class T> class CodeModelPointer
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#endif // QT_VERSION >= 0x040400
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{
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public:
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typedef T Type;
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#if QT_VERSION < 0x040400
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inline T &operator*() { return *d; }
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inline const T &operator*() const { return *d; }
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inline T *operator->() { return d; }
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inline const T *operator->() const { return d; }
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inline operator T *() { return d; }
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inline operator const T *() const { return d; }
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inline T *data() { return d; }
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inline const T *data() const { return d; }
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inline const T *constData() const { return d; }
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inline bool operator==(const CodeModelPointer<T> &other) const { return d == other.d; }
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inline bool operator!=(const CodeModelPointer<T> &other) const { return d != other.d; }
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inline bool operator==(const T *ptr) const { return d == ptr; }
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inline bool operator!=(const T *ptr) const { return d != ptr; }
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inline CodeModelPointer() { d = 0; }
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inline ~CodeModelPointer() { if (d && !d->ref.deref()) delete d; }
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explicit CodeModelPointer(T *data);
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inline CodeModelPointer(const CodeModelPointer<T> &o) : d(o.d) { if (d) d->ref.ref(); }
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inline CodeModelPointer<T> & operator=(const CodeModelPointer<T> &o) {
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if (o.d != d) {
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T *x = o.d;
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if (x) x->ref.ref();
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x = qAtomicSetPtr(&d, x);
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if (x && !x->ref.deref())
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delete x;
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}
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return *this;
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}
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inline CodeModelPointer &operator=(T *o) {
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if (o != d) {
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T *x = o;
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if (x) x->ref.ref();
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x = qAtomicSetPtr(&d, x);
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if (x && !x->ref.deref())
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delete x;
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}
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return *this;
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}
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inline bool operator!() const { return !d; }
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private:
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T *d;
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#else // QT_VERSION < 0x040400
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inline CodeModelPointer(T *value = 0) : QAtomicPointer<T>(value) {}
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inline CodeModelPointer &operator=(T *o) {
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QAtomicPointer<T>::operator=(o);
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return *this;
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}
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inline T *data() { return (T *) *this; }
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inline const T *data() const { return (const T *) *this; }
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inline const T *constData() const { return (const T *) *this; }
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#endif
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};
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#if QT_VERSION < 0x040400
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template <class T>
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Q_INLINE_TEMPLATE CodeModelPointer<T>::CodeModelPointer(T *adata) : d(adata)
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{ if (d) d->ref.ref(); }
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#endif
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#endif // CODEMODEL_POINTER_H
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