The QExplicitlySharedDataPointer class represents a pointer to an explicitly shared object.
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template<typename T>
class QExplicitlySharedDataPointer< T >
The QExplicitlySharedDataPointer class represents a pointer to an explicitly shared object. This class implements thread-safe reference counting.
Except for one major difference QExplicitlySharedDataPointer is very similar to a QSharedDataPointer.
The methods in QExplicitlySharedDataPointer do not provide automatic copy on write functionality. Instead there is a detach() method which must be called when a copy is required.
If your application uses this class and calls detach() frequently, consider using QSharedDataPointer.
- See also
- QSharedData, QSharedDataPointer
template<typename T >
| QExplicitlySharedDataPointer< T >::pointer |
template<typename T >
| QExplicitlySharedDataPointer< T >::Type |
template<typename T >
| QExplicitlySharedDataPointer< T >::QExplicitlySharedDataPointer |
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Constructs a QExplicitlySharedDataPointer initialized to a nullptr.
template<class T >
| QExplicitlySharedDataPointer< T >::QExplicitlySharedDataPointer |
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T * |
data | ) |
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Constructs a QExplicitlySharedDataPointer which points to the given data and increments the reference count.
template<typename T >
| QExplicitlySharedDataPointer< T >::QExplicitlySharedDataPointer |
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const QExplicitlySharedDataPointer< T > & |
other | ) |
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Copy constructs a new QExplicitlySharedDataPointer from other. The reference count of the data is incremented.
template<typename T >
template<class X >
| QExplicitlySharedDataPointer< T >::QExplicitlySharedDataPointer |
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const QExplicitlySharedDataPointer< X > & |
other | ) |
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Copy constructs a new QExplicitlySharedDataPointer by statically casting other. The reference count of the data is incremented.
template<typename T >
| QExplicitlySharedDataPointer< T >::QExplicitlySharedDataPointer |
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QExplicitlySharedDataPointer< T > && |
other | ) |
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Move constructs a new QExplicitlySharedDataPointer from other.
template<typename T >
| QExplicitlySharedDataPointer< T >::~QExplicitlySharedDataPointer |
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Decrements the reference count of data. If the reference count becomes 0 the data is deleted.
template<typename T >
| T * QExplicitlySharedDataPointer< T >::clone |
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Creates and returns a deep copy of the current data. This method is called by detach() when the reference count is greater than 1 in order to create the new copy.
- See also
- QSharedDataPointer::clone()
template<typename T >
| const T * QExplicitlySharedDataPointer< T >::constData |
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Returns a const pointer to the shared data object.
- See also
- data()
template<typename T >
| T * QExplicitlySharedDataPointer< T >::data |
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Returns a pointer to the shared data object.
template<typename T >
| void QExplicitlySharedDataPointer< T >::detach |
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If the data reference count is greater than 1, then this method creates a deep copy of the shared data and sets the current QExplicitlySharedDataPointer to point to the copy.
template<typename T >
| QExplicitlySharedDataPointer< T >::operator bool |
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const |
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Returns true if data is not a nullptr.
template<typename T >
| bool QExplicitlySharedDataPointer< T >::operator! |
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Returns true if data is a nullptr.
template<typename T >
template<class U >
| bool QExplicitlySharedDataPointer< T >::operator!= |
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const QExplicitlySharedDataPointer< U > & |
other | ) |
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Returns true if this QExplicitlySharedDataPointer is not equal to other, otherwise returns false.
template<typename T >
| bool QExplicitlySharedDataPointer< T >::operator!= |
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const T * |
ptr | ) |
const |
Returns true if this QExplicitlySharedDataPointer is not equal to ptr, otherwise returns false.
template<typename T >
| T & QExplicitlySharedDataPointer< T >::operator* |
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Provides access to the data.
template<typename T >
| T * QExplicitlySharedDataPointer< T >::operator-> |
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Provides access to the data.
template<typename T >
| T * QExplicitlySharedDataPointer< T >::operator-> |
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const |
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Provides read only access to the data.
template<typename T >
| QExplicitlySharedDataPointer< T > & QExplicitlySharedDataPointer< T >::operator= |
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const QExplicitlySharedDataPointer< T > & |
other | ) |
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Assigns other to the current QSharedDataPointer and increments the reference count. The reference count of the old shared data object is decremented. If the reference count of the old shared data object becomes 0, the old shared data object is deleted.
template<typename T >
| QExplicitlySharedDataPointer< T > & QExplicitlySharedDataPointer< T >::operator= |
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QExplicitlySharedDataPointer< T > && |
other | ) |
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Move assigns from other and returns a reference to this object.
template<typename T >
| QExplicitlySharedDataPointer & QExplicitlySharedDataPointer< T >::operator= |
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T * |
other | ) |
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Sets the current QExplicitlySharedDataPointer to other and increments the reference count. The reference count of the old shared data is decremented. If the reference count of the old shared data object becomes 0, the old shared data object is deleted.
template<typename T >
template<class U >
| bool QExplicitlySharedDataPointer< T >::operator== |
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const QExplicitlySharedDataPointer< U > & |
other | ) |
const |
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Returns true if this QExplicitlySharedDataPointer is equal to other, otherwise returns false.
template<typename T >
| bool QExplicitlySharedDataPointer< T >::operator== |
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const T * |
ptr | ) |
const |
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Returns true if this QExplicitlySharedDataPointer is equal to ptr, otherwise returns false.
template<typename T >
| void QExplicitlySharedDataPointer< T >::reset |
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Resets the current QExplicitlySharedDataPointer to a nullptr. If the reference count becomes 0 the data will be destroyed.
template<typename T >
| void QExplicitlySharedDataPointer< T >::swap |
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QExplicitlySharedDataPointer< T > & |
other | ) |
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Swap this QExplicitlySharedDataPointer with other.
2.0.0