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std::weak_ptr::lock

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< cpp‎ | memory‎ | weak ptr

 
 
 
La gestion dynamique de la mémoire
Faible niveau de gestion de la mémoire
Répartiteurs
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Allocators
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allocator
allocator_traits (C++11)
allocator_arg_t (C++11)
allocator_arg (C++11)
uses_allocator (C++11)
scoped_allocator_adaptor (C++11)
Non initialisée stockage
Original:
Uninitialized storage
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uninitialized_copy
uninitialized_copy_n (C++11)
uninitialized_fill
uninitialized_fill_n
raw_storage_iterator
get_temporary_buffer
return_temporary_buffer
Pointeurs intelligents
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Smart pointers
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unique_ptr (C++11)
shared_ptr (C++11)
weak_ptr (C++11)
auto_ptr (obsolète)
owner_less (C++11)
enable_shared_from_this (C++11)
bad_weak_ptr (C++11)
default_delete (C++11)
Soutien garbage collection
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Garbage collection support
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declare_reachable (C++11)
undeclare_reachable (C++11)
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undeclare_no_pointers (C++11)
pointer_safety (C++11)
get_pointer_safety (C++11)
Divers
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Miscellaneous
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pointer_traits (C++11)
addressof (C++11)
align (C++11)
Bibliothèque C
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C Library
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std::weak_ptr
Les fonctions membres
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Member functions
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weak_ptr::weak_ptr
weak_ptr::~weak_ptr
weak_ptr::operator=
Modificateurs
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Modifiers
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weak_ptr::reset
weak_ptr::swap
Des observateurs
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Observers
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weak_ptr::use_count
weak_ptr::expired
weak_ptr::lock
weak_ptr::owner_before
Tiers fonctions
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Non-member functions
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std::swap
 
std::shared_ptr<T> lock() const
(depuis C++11)
Crée un nouveau shared_ptr qui partage la propriété de l'objet géré. S'il n'y a pas d'objet géré, c'est à dire *this est vide, alors le shared_ptr retournée est aussi vide .
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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Retourne effectivement expired() ? shared_ptr<T>() : shared_ptr<T>(*this) .
Original:
Effectively returns expired() ? shared_ptr<T>() : shared_ptr<T>(*this).
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Sommaire

[modifier] Paramètres

(Aucun)
Original:
(none)
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[modifier] Retourne la valeur

Un shared_ptr qui partage la propriété de l'objet possédé .
Original:
A shared_ptr which shares ownership of the owned object.
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[modifier] Exceptions

noexcept specification:  
noexcept
   (depuis C++11)

[modifier] Notes

Tant cette fonction et le constructeur de shared_ptr peuvent être utilisés pour acquérir la propriété temporaire de l'objet géré. La différence est que le constructeur de std::shared_ptr<T> lève une exception si l'argument est vide std::weak_ptr, tandis que std::weak_ptr<T>::lock() construit une std::shared_ptr<T> vide .
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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[modifier] Exemple

[modifier] Voir aussi

vérifie si l'objet référencé a déjà été supprimé
Original:
checks whether the referenced object was already deleted
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(fonction membre publique) [edit]