toast::weak_unintrusive_ptr< T > Class Template Reference
[toast unintrusive pointer]

#include <toast/weak_unintrusive_ptr.hpp>

List of all members.

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Detailed Description

template<class T>
class toast::weak_unintrusive_ptr< T >

Weak unintrusive smart pointer.

The complement of toast::unintrusive_ptr. Weak pointers are used to avoid circular references. If A -> B -> A, then without using weak pointers A and B will keep each other alive perpetually because their reference counts can never reach zero without the other dying.

Since a weak pointer doesn't keep the object alive, when calling lock() the returned unintrusive_ptr may be NULL. You will need to check for this before using the returned unintrusive_ptr.

Public Types
typedef T	element_type
Public Member Functions
	weak_unintrusive_ptr (weak_unintrusive_ptr const &r)
template<class Y>
	weak_unintrusive_ptr (weak_unintrusive_ptr< Y > const &r)
template<class Y>
	weak_unintrusive_ptr (unintrusive_ptr< Y > const &r)
weak_unintrusive_ptr &	operator= (weak_unintrusive_ptr const &r)
template<class Y>
weak_unintrusive_ptr &	operator= (weak_unintrusive_ptr< Y > const &r)
template<class Y>
weak_unintrusive_ptr &	operator= (unintrusive_ptr< Y > const &r)
long	use_count () const
bool	expired () const
unintrusive_ptr< T >	lock () const
void	reset ()
void	swap (weak_unintrusive_ptr< T > &b)
Friends
class	count_wrapper
class	unintrusive_ptr

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Constructor & Destructor Documentation

template<class T>

template<class Y>

toast::weak_unintrusive_ptr< T >::weak_unintrusive_ptr

(

unintrusive_ptr< Y > const &

r

)

[inline]

Warning:

This constructor reads *and* potentially writes to the provided unintrusive_ptr. Simultaneous read/writes are not thread- safe.

References toast::unintrusive_ptr< T >::m_wrapper.

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The documentation for this class was generated from the following file:

• toast/weak_unintrusive_ptr.hpp