/****************************************************************************
**
-** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
-** All rights reserved.
-** Contact: Nokia Corporation (qt-info@nokia.com)
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/
**
** This file is part of the QtCore module of the Qt Toolkit.
**
**
**
**
+**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtCore/qglobal.h>
#include <QtCore/qvariant.h>
+#include <private/qdeclarativedata_p.h>
QT_BEGIN_NAMESPACE
+class QDeclarativeGuardImpl
+{
+public:
+ inline QDeclarativeGuardImpl();
+ inline QDeclarativeGuardImpl(QObject *);
+ inline QDeclarativeGuardImpl(const QDeclarativeGuardImpl &);
+ inline ~QDeclarativeGuardImpl();
+
+ QObject *o;
+ QDeclarativeGuardImpl *next;
+ QDeclarativeGuardImpl **prev;
+
+ inline void addGuard();
+ inline void remGuard();
+};
+
class QObject;
template<class T>
-class QDeclarativeGuard
+class QDeclarativeGuard : private QDeclarativeGuardImpl
{
- QObject *o;
- QDeclarativeGuard<QObject> *next;
- QDeclarativeGuard<QObject> **prev;
friend class QDeclarativeData;
public:
inline QDeclarativeGuard();
inline QDeclarativeGuard<T> &operator=(const QDeclarativeGuard<T> &o);
inline QDeclarativeGuard<T> &operator=(T *);
+
+ inline T *object() const;
+ inline void setObject(T *g);
inline bool isNull() const
{ return !o; }
protected:
virtual void objectDestroyed(T *) {}
-
-private:
- inline void addGuard();
- inline void remGuard();
};
QT_END_NAMESPACE
Q_DECLARE_METATYPE(QDeclarativeGuard<QObject>)
-#include "private/qdeclarativedata_p.h"
-
QT_BEGIN_NAMESPACE
+QDeclarativeGuardImpl::QDeclarativeGuardImpl()
+: o(0), next(0), prev(0)
+{
+}
+
+QDeclarativeGuardImpl::QDeclarativeGuardImpl(QObject *g)
+: o(g), next(0), prev(0)
+{
+ if (o) addGuard();
+}
+
+QDeclarativeGuardImpl::QDeclarativeGuardImpl(const QDeclarativeGuardImpl &g)
+: o(g.o), next(0), prev(0)
+{
+ if (o) addGuard();
+}
+
+QDeclarativeGuardImpl::~QDeclarativeGuardImpl()
+{
+ if (prev) remGuard();
+ o = 0;
+}
+
+void QDeclarativeGuardImpl::addGuard()
+{
+ Q_ASSERT(!prev);
+
+ if (QObjectPrivate::get(o)->wasDeleted)
+ return;
+
+ QDeclarativeData *data = QDeclarativeData::get(o, true);
+ next = data->guards;
+ if (next) next->prev = &next;
+ data->guards = this;
+ prev = &data->guards;
+}
+
+void QDeclarativeGuardImpl::remGuard()
+{
+ Q_ASSERT(prev);
+
+ if (next) next->prev = prev;
+ *prev = next;
+ next = 0;
+ prev = 0;
+}
+
template<class T>
QDeclarativeGuard<T>::QDeclarativeGuard()
-: o(0), next(0), prev(0)
{
}
template<class T>
QDeclarativeGuard<T>::QDeclarativeGuard(T *g)
-: o(g), next(0), prev(0)
+: QDeclarativeGuardImpl(g)
{
- if (o) addGuard();
}
template<class T>
QDeclarativeGuard<T>::QDeclarativeGuard(const QDeclarativeGuard<T> &g)
-: o(g.o), next(0), prev(0)
+: QDeclarativeGuardImpl(g)
{
- if (o) addGuard();
}
template<class T>
QDeclarativeGuard<T>::~QDeclarativeGuard()
{
- if (prev) remGuard();
- o = 0;
}
template<class T>
QDeclarativeGuard<T> &QDeclarativeGuard<T>::operator=(const QDeclarativeGuard<T> &g)
{
- if (g.o != o) {
- if (prev) remGuard();
- o = g.o;
- if (o) addGuard();
- }
+ setObject(g.object());
return *this;
}
template<class T>
QDeclarativeGuard<T> &QDeclarativeGuard<T>::operator=(T *g)
{
+ setObject(g);
+ return *this;
+}
+
+template<class T>
+T *QDeclarativeGuard<T>::object() const
+{
+ return static_cast<T *>(o);
+};
+
+template<class T>
+void QDeclarativeGuard<T>::setObject(T *g)
+{
if (g != o) {
if (prev) remGuard();
o = g;
if (o) addGuard();
}
- return *this;
}
QT_END_NAMESPACE