codemodel_pointer.h
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r10 | /**************************************************************************** | ||
** | ||||
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r87 | ** Copyright (C) 2008-2009 Nokia Corporation and/or its subsidiary(-ies). | ||
** All rights reserved. | ||||
** Contact: Nokia Corporation (qt-info@nokia.com) | ||||
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r10 | ** | ||
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r87 | ** This file is part of the Qt Script Generator project on Qt Labs. | ||
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r10 | ** | ||
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r87 | ** $QT_BEGIN_LICENSE:LGPL$ | ||
** No Commercial Usage | ||||
** This file contains pre-release code and may not be distributed. | ||||
** You may use this file in accordance with the terms and conditions | ||||
** contained in the Technology Preview License Agreement accompanying | ||||
** this package. | ||||
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r10 | ** | ||
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r87 | ** GNU Lesser General Public License Usage | ||
** Alternatively, this file may be used under the terms of the GNU Lesser | ||||
** General Public License version 2.1 as published by the Free Software | ||||
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** 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. | ||||
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r10 | ** | ||
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r87 | ** In addition, as a special exception, Nokia gives you certain additional | ||
** rights. These rights are described in the Nokia Qt LGPL Exception | ||||
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** | ||||
** $QT_END_LICENSE$ | ||||
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r10 | ** | ||
****************************************************************************/ | ||||
#ifndef CODEMODEL_POINTER_H | ||||
#define CODEMODEL_POINTER_H | ||||
#include <QtCore/QSharedData> | ||||
// Since the atomic API changed in 4.4 we need to hack a little here | ||||
// to make it work with both 4.3 and 4.4 until that is not required | ||||
#if QT_VERSION >= 0x040400 | ||||
# include <QtCore/qatomic.h> | ||||
template <class T> class CodeModelPointer: public QAtomicPointer<T> | ||||
#else | ||||
template <class T> class CodeModelPointer | ||||
#endif // QT_VERSION >= 0x040400 | ||||
{ | ||||
public: | ||||
typedef T Type; | ||||
#if QT_VERSION < 0x040400 | ||||
inline T &operator*() { return *d; } | ||||
inline const T &operator*() const { return *d; } | ||||
inline T *operator->() { return d; } | ||||
inline const T *operator->() const { return d; } | ||||
inline operator T *() { return d; } | ||||
inline operator const T *() const { return d; } | ||||
inline T *data() { return d; } | ||||
inline const T *data() const { return d; } | ||||
inline const T *constData() const { return d; } | ||||
inline bool operator==(const CodeModelPointer<T> &other) const { return d == other.d; } | ||||
inline bool operator!=(const CodeModelPointer<T> &other) const { return d != other.d; } | ||||
inline bool operator==(const T *ptr) const { return d == ptr; } | ||||
inline bool operator!=(const T *ptr) const { return d != ptr; } | ||||
inline CodeModelPointer() { d = 0; } | ||||
inline ~CodeModelPointer() { if (d && !d->ref.deref()) delete d; } | ||||
explicit CodeModelPointer(T *data); | ||||
inline CodeModelPointer(const CodeModelPointer<T> &o) : d(o.d) { if (d) d->ref.ref(); } | ||||
inline CodeModelPointer<T> & operator=(const CodeModelPointer<T> &o) { | ||||
if (o.d != d) { | ||||
T *x = o.d; | ||||
if (x) x->ref.ref(); | ||||
x = qAtomicSetPtr(&d, x); | ||||
if (x && !x->ref.deref()) | ||||
delete x; | ||||
} | ||||
return *this; | ||||
} | ||||
inline CodeModelPointer &operator=(T *o) { | ||||
if (o != d) { | ||||
T *x = o; | ||||
if (x) x->ref.ref(); | ||||
x = qAtomicSetPtr(&d, x); | ||||
if (x && !x->ref.deref()) | ||||
delete x; | ||||
} | ||||
return *this; | ||||
} | ||||
inline bool operator!() const { return !d; } | ||||
private: | ||||
T *d; | ||||
#else // QT_VERSION < 0x040400 | ||||
inline CodeModelPointer(T *value = 0) : QAtomicPointer<T>(value) {} | ||||
inline CodeModelPointer &operator=(T *o) { | ||||
QAtomicPointer<T>::operator=(o); | ||||
return *this; | ||||
} | ||||
inline T *data() { return (T *) *this; } | ||||
inline const T *data() const { return (const T *) *this; } | ||||
inline const T *constData() const { return (const T *) *this; } | ||||
#endif | ||||
}; | ||||
#if QT_VERSION < 0x040400 | ||||
template <class T> | ||||
Q_INLINE_TEMPLATE CodeModelPointer<T>::CodeModelPointer(T *adata) : d(adata) | ||||
{ if (d) d->ref.ref(); } | ||||
#endif | ||||
#endif // CODEMODEL_POINTER_H | ||||