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Diffstat (limited to 'src/qml/qml/ftw/qlazilyallocated_p.h')
-rw-r--r-- | src/qml/qml/ftw/qlazilyallocated_p.h | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/src/qml/qml/ftw/qlazilyallocated_p.h b/src/qml/qml/ftw/qlazilyallocated_p.h new file mode 100644 index 0000000000..960d84d5e7 --- /dev/null +++ b/src/qml/qml/ftw/qlazilyallocated_p.h @@ -0,0 +1,146 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/ +** +** This file is part of the QtQml 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 QLAZILYALLOCATED_P_H +#define QLAZILYALLOCATED_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 <private/qflagpointer_p.h> + +QT_BEGIN_NAMESPACE + +template<typename T> +class QLazilyAllocated { +public: + inline QLazilyAllocated(); + inline ~QLazilyAllocated(); + + inline bool isAllocated() const; + + inline T *operator->() const; + + inline T &value(); + inline const T &value() const; + + inline bool flag() const; + inline void setFlag(); + inline void clearFlag(); + inline void setFlagValue(bool); +private: + mutable QFlagPointer<T> d; +}; + +template<typename T> +QLazilyAllocated<T>::QLazilyAllocated() +{ +} + +template<typename T> +QLazilyAllocated<T>::~QLazilyAllocated() +{ + delete *d; +} + +template<typename T> +bool QLazilyAllocated<T>::isAllocated() const +{ + return !d.isNull(); +} + +template<typename T> +T &QLazilyAllocated<T>::value() +{ + if (d.isNull()) d = new T; + return *(*d); +} + +template<typename T> +const T &QLazilyAllocated<T>::value() const +{ + if (d.isNull()) d = new T; + return *(*d); +} + +template<typename T> +T *QLazilyAllocated<T>::operator->() const +{ + return *d; +} + +template<typename T> +bool QLazilyAllocated<T>::flag() const +{ + return d.flag(); +} + +template<typename T> +void QLazilyAllocated<T>::setFlag() +{ + d.setFlag(); +} + +template<typename T> +void QLazilyAllocated<T>::clearFlag() +{ + d.clearFlag(); +} + +template<typename T> +void QLazilyAllocated<T>::setFlagValue(bool v) +{ + d.setFlagValue(v); +} + +QT_END_NAMESPACE + +#endif // QLAZILYALLOCATED_P_H |