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std::weak_ptr::lock

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< cpp‎ | memory‎ | weak ptr

 
 
Utilidades de la biblioteca
Escriba apoyo (basic types, RTTI, type traits)
Gestión de memoria dinámica
Gestión de errores
Programa de servicios públicos
Funciones variadic
Fecha y hora
Objetos Function
(C++11)
Operadores relacionales
Original:
Relational operators
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Pares y tuplas
Original:
Pairs and tuples
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(C++11)
Cambiar, hacia adelante y mover
Original:
Swap, forward and move
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(C++11)
(C++11)
(C++11)
 
Gestión de memoria dinámica
Bajo la gestión de memoria de nivel
Los asignadores
Original:
Allocators
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Inicializar el almacenamiento
Original:
Uninitialized storage
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Punteros inteligentes
Original:
Smart pointers
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(C++11)
(C++11)
(C++11)
(obsoleto)
(C++11)
Garbage soporte colección
Original:
Garbage collection support
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Varios
Original:
Miscellaneous
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(C++11)
(C++11)
C Library
Original:
C Library
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std::weak_ptr
Las funciones miembro
Original:
Member functions
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Modificadores
Original:
Modifiers
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Los observadores
Original:
Observers
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weak_ptr::lock
Terceros funciones
Original:
Non-member functions
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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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(función miembro público) [editar]