std::weak_ptr::lock
From cppreference.com
| std::shared_ptr<T> lock() const |
(since C++11) | |
Creates a new shared_ptr that shares ownership of the managed object. If there is no managed object, i.e. *this is empty, then the returned shared_ptr also is empty.
Effectively returns expired() ? shared_ptr<T>() : shared_ptr<T>(*this).
Contents |
[edit] Parameters
(none)
[edit] Return value
A shared_ptr which shares ownership of the owned object.
[edit] Exceptions
[edit] Notes
Both this function and the constructor of shared_ptr may be used to acquire temporary ownership of the managed object. The difference is that the constructor of std::shared_ptr<T> throws an exception when the std::weak_ptr argument is empty, while std::weak_ptr<T>::lock() constructs an empty std::shared_ptr<T>.
[edit] Example
| This section is incomplete Reason: no example |
[edit] See also
| checks whether the referenced object was already deleted (public member function) | |
