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std::weak_ptr::lock

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< cpp‎ | memory‎ | weak ptr

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Os operadores relacionais
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rel_ops::operator!=
rel_ops::operator>
rel_ops::operator<=
rel_ops::operator>=
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Pairs and tuples
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Swap, forward and move
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std::weak_ptr
Funções de membro
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Member functions
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weak_ptr::weak_ptr
weak_ptr::~weak_ptr
weak_ptr::operator=
Modificadores
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weak_ptr::reset
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Observadores
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weak_ptr::use_count
weak_ptr::expired
weak_ptr::lock
weak_ptr::owner_before
Não-membros funções
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Non-member functions
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std::shared_ptr<T> lock() const
 (desde C++11)
Cria um novo shared_ptr que partes a propriedade do objeto gerenciado. Se não houver um objeto gerenciado, ou seja *this está vazia, então o shared_ptr voltou também está vazia.
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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Efetivamente retorna expired() ? shared_ptr<T>() : shared_ptr<T>(*this).
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Effectively returns expired() ? shared_ptr<T>() : shared_ptr<T>(*this).
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Índice

[editar] Parâmetros

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

A shared_ptr que compartilha a propriedade do objeto de propriedade.
Original:
A shared_ptr which shares ownership of the owned object.
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[editar] Exceções

noexcept specification:  
noexcept
  (desde C++11)

[editar] Notas

Tanto esta função eo construtor de shared_ptr pode ser usado para adquirir a propriedade temporária do objeto gerenciado. A diferença é que o construtor de std::shared_ptr<T> lança uma exceção quando o argumento std::weak_ptr está vazio, enquanto constrói uma std::weak_ptr<T>::lock() std::shared_ptr<T> vazio.
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] Exemplo

Esta seção está incompleta
Motivo: sem exemplo

[editar] Veja também
Verifica se o objeto referenciado já foi excluído
Original:
checks whether the referenced object was already deleted
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(função pública membro) [edit]
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