/**************************************************************************** | |
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** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). | |
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** | |
** GNU General Public License Usage | |
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****************************************************************************/ | |
#ifndef QSCOPEDPOINTER_H | |
#define QSCOPEDPOINTER_H | |
#include <QtCore/qglobal.h> | |
QT_BEGIN_HEADER | |
QT_BEGIN_NAMESPACE | |
QT_MODULE(Core) | |
template <typename T> | |
struct QScopedPointerDeleter | |
{ | |
static inline void cleanup(T *pointer) | |
{ | |
// Enforce a complete type. | |
// If you get a compile error here, read the secion on forward declared | |
// classes in the QScopedPointer documentation. | |
typedef char IsIncompleteType[ sizeof(T) ? 1 : -1 ]; | |
(void) sizeof(IsIncompleteType); | |
delete pointer; | |
} | |
}; | |
template <typename T> | |
struct QScopedPointerArrayDeleter | |
{ | |
static inline void cleanup(T *pointer) | |
{ | |
// Enforce a complete type. | |
// If you get a compile error here, read the secion on forward declared | |
// classes in the QScopedPointer documentation. | |
typedef char IsIncompleteType[ sizeof(T) ? 1 : -1 ]; | |
(void) sizeof(IsIncompleteType); | |
delete [] pointer; | |
} | |
}; | |
struct QScopedPointerPodDeleter | |
{ | |
static inline void cleanup(void *pointer) { if (pointer) qFree(pointer); } | |
}; | |
template <typename T, typename Cleanup = QScopedPointerDeleter<T> > | |
class QScopedPointer | |
{ | |
#ifndef Q_CC_NOKIAX86 | |
typedef T *QScopedPointer:: *RestrictedBool; | |
#endif | |
public: | |
explicit inline QScopedPointer(T *p = 0) : d(p) | |
{ | |
} | |
inline ~QScopedPointer() | |
{ | |
T *oldD = this->d; | |
Cleanup::cleanup(oldD); | |
this->d = 0; | |
} | |
inline T &operator*() const | |
{ | |
Q_ASSERT(d); | |
return *d; | |
} | |
inline T *operator->() const | |
{ | |
Q_ASSERT(d); | |
return d; | |
} | |
inline bool operator!() const | |
{ | |
return !d; | |
} | |
#if defined(Q_CC_NOKIAX86) || defined(Q_QDOC) | |
inline operator bool() const | |
{ | |
return isNull() ? 0 : &QScopedPointer::d; | |
} | |
#else | |
inline operator RestrictedBool() const | |
{ | |
return isNull() ? 0 : &QScopedPointer::d; | |
} | |
#endif | |
inline T *data() const | |
{ | |
return d; | |
} | |
inline bool isNull() const | |
{ | |
return !d; | |
} | |
inline void reset(T *other = 0) | |
{ | |
if (d == other) | |
return; | |
T *oldD = d; | |
d = other; | |
Cleanup::cleanup(oldD); | |
} | |
inline T *take() | |
{ | |
T *oldD = d; | |
d = 0; | |
return oldD; | |
} | |
inline void swap(QScopedPointer<T, Cleanup> &other) | |
{ | |
qSwap(d, other.d); | |
} | |
typedef T *pointer; | |
protected: | |
T *d; | |
private: | |
Q_DISABLE_COPY(QScopedPointer) | |
}; | |
template <class T, class Cleanup> | |
inline bool operator==(const QScopedPointer<T, Cleanup> &lhs, const QScopedPointer<T, Cleanup> &rhs) | |
{ | |
return lhs.data() == rhs.data(); | |
} | |
template <class T, class Cleanup> | |
inline bool operator!=(const QScopedPointer<T, Cleanup> &lhs, const QScopedPointer<T, Cleanup> &rhs) | |
{ | |
return lhs.data() != rhs.data(); | |
} | |
template <class T, class Cleanup> | |
Q_INLINE_TEMPLATE void qSwap(QScopedPointer<T, Cleanup> &p1, QScopedPointer<T, Cleanup> &p2) | |
{ p1.swap(p2); } | |
template <typename T, typename Cleanup = QScopedPointerArrayDeleter<T> > | |
class QScopedArrayPointer : public QScopedPointer<T, Cleanup> | |
{ | |
public: | |
explicit inline QScopedArrayPointer(T *p = 0) | |
: QScopedPointer<T, Cleanup>(p) | |
{ | |
} | |
inline T &operator[](int i) | |
{ | |
return this->d[i]; | |
} | |
inline const T &operator[](int i) const | |
{ | |
return this->d[i]; | |
} | |
private: | |
Q_DISABLE_COPY(QScopedArrayPointer) | |
}; | |
QT_END_NAMESPACE | |
QT_END_HEADER | |
#endif // QSCOPEDPOINTER_H |