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std::weak_ptr::lock

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Dynamische Speicherverwaltung
Low-Level-Speicherverwaltung
Zuweiser
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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)
Initialisierter Speicher
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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
Intelligente Zeiger
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Smart pointers
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unique_ptr(C++11)
shared_ptr(C++11)
weak_ptr(C++11)
auto_ptr(veraltet)
owner_less(C++11)
enable_shared_from_this(C++11)
bad_weak_ptr(C++11)
default_delete(C++11)
Garbage Collection Unterstützung
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Garbage collection support
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declare_reachable(C++11)
undeclare_reachable(C++11)
declare_no_pointers(C++11)
undeclare_no_pointers(C++11)
pointer_safety(C++11)
get_pointer_safety(C++11)
Verschiedenes
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Miscellaneous
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pointer_traits(C++11)
addressof(C++11)
align(C++11)
C-Bibliothek
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C Library
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std::weak_ptr
Member-Funktionen
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Member functions
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weak_ptr::weak_ptr
weak_ptr::~weak_ptr
weak_ptr::operator=
Modifiers
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Modifiers
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weak_ptr::reset
weak_ptr::swap
Beobachter
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Observers
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weak_ptr::use_count
weak_ptr::expired
weak_ptr::lock
weak_ptr::owner_before
Non-Member-Funktionen
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Non-member functions
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std::swap
 
std::shared_ptr<T> lock() const
(seit C++11)
Erstellt eine neue shared_ptr, dass das Eigentum des verwalteten Objekts Aktien. Wenn es keine verwaltete Objekt, dh *this leer ist, dann die zurückgegebene shared_ptr auch ist leer .
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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Effektiv gibt expired() ? shared_ptr<T>() : shared_ptr<T>(*this) .
Original:
Effectively returns expired() ? shared_ptr<T>() : shared_ptr<T>(*this).
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Inhaltsverzeichnis

[Bearbeiten] Parameter

(None)
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(none)
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[Bearbeiten] Rückgabewert

A shared_ptr das Eigentum des eigenen Objekts Aktie .
Original:
A shared_ptr which shares ownership of the owned object.
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[Bearbeiten] Ausnahmen

noexcept specification:  
noexcept
  (seit C++11)

[Bearbeiten] Notes

Sowohl diese Funktion und der Konstrukteur des shared_ptr kann verwendet werden, um vorübergehende Besitz des verwalteten Objekts zu erwerben. Der Unterschied ist, dass der Konstrukteur std::shared_ptr<T> eine Ausnahme, wenn der std::weak_ptr Argument leer ist wirft, während std::weak_ptr<T>::lock() eine leere std::shared_ptr<T> konstruiert .
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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[Bearbeiten] Beispiel

[Bearbeiten] Siehe auch

prüft, ob das referenzierte Objekt wurde bereits gelöscht
Original:
checks whether the referenced object was already deleted
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(öffentliche Elementfunktion) [edit]