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std::weak_ptr::lock

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< cpp‎ | memory‎ | weak ptr

 
 
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initializer_list(C++11)
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rel_ops::operator!=
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swap
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Gestión de memoria dinámica
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Allocators
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std::weak_ptr
Las funciones miembro
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weak_ptr::weak_ptr
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Observers
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weak_ptr::use_count
weak_ptr::expired
weak_ptr::lock
weak_ptr::owner_before
Terceros funciones
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Non-member functions
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std::swap
 
std::shared_ptr<T> lock() const
(desde C++11)
Crea un nuevo shared_ptr que comparte la propiedad del objeto administrado. Si no hay ningún objeto administrado, es decir *this está vacío, entonces el shared_ptr regresó también está vacío .
Original:
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.
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Efectivamente vuelve expired() ? shared_ptr<T>() : shared_ptr<T>(*this) .
Original:
Effectively returns expired() ? shared_ptr<T>() : shared_ptr<T>(*this).
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Contenido

[editar] Parámetros

(Ninguno)
Original:
(none)
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[editar] Valor de retorno

A shared_ptr que comparte la propiedad del objeto de propiedad .
Original:
A shared_ptr which shares ownership of the owned object.
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[editar] Excepciones

noexcept specification:  
noexcept
  (desde C++11)

[editar] Notas

Tanto esta función y el constructor de shared_ptr puede utilizarse para adquirir el dominio temporal del objeto gestionado. La diferencia es que el constructor de std::shared_ptr<T> produce una excepción cuando el argumento std::weak_ptr está vacío, mientras que std::weak_ptr<T>::lock() construye un std::shared_ptr<T> vacío .
Original:
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>.
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[editar] Ejemplo

[editar] Ver también

Comprueba si el objeto de referencia ya ha sido eliminado
Original:
checks whether the referenced object was already deleted
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(miembro público función) [edit]