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std::allocator::allocate

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< cpp‎ | memory‎ | allocator

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C++
 
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::allocator
Member-Funktionen
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Member functions
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allocator::allocator
allocator::~allocator
allocator::address
allocator::allocate
allocator::deallocate
allocator::max_size
allocator::construct
allocator::destroy
Non-Member-Funktionen
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Non-member functions
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operator==
operator!=
 
pointer allocate( size_type n, std::allocator<void>::const_pointer hint = 0 );
Ordnet n * sizeof(T) Bytes initialisierten Speicher durch den Aufruf ::operator new(std::size_t), aber es ist nicht angegeben, wann und wie diese Funktion aufgerufen wird. Der Zeiger hint kann zur Lokalität der Referenz darstellen: die Zuweisungseinrichtung, wenn durch die Ausführung unterstützt, wird versuchen, den neuen Speicherblock so nahe wie möglich zu verteilen .. hint
Original:
Allocates n * sizeof(T) bytes of uninitialized storage by calling ::operator new(std::size_t), but it is unspecified when and how this function is called. The pointer hint may be used to provide locality of reference: the allocator, if supported by the implementation, will attempt to allocate the new memory block as close as possible to hint.
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Inhaltsverzeichnis

[Bearbeiten] Parameter

n -
die Anzahl der Objekte, um Speicherplatz für zuzuteilen
Original:
the number of objects to allocate storage for
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hint -
Zeiger auf eine Speicherstelle in der Nähe
Original:
pointer to a nearby memory location
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[Bearbeiten] Rückgabewert

Zeiger auf das erste Byte eines Speicherblocks geeigneterweise ausgerichtet und ausreichend, um eine Anordnung von Gegenständen vom Typ n T halten .
Original:
Pointer to the first byte of a memory block suitably aligned and sufficient to hold an array of n objects of type T.
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[Bearbeiten] Ausnahmen

Wirft std::bad_alloc, falls die Zuweisung nicht .
Original:
Throws std::bad_alloc if allocation fails.
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[Bearbeiten] Siehe auch

[statisch]
ordnet initialisierten Speicher mit der Zuweisung
Original:
allocates uninitialized storage using the allocator
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(public static Elementfunktion of std::allocator_traits) [edit]
Von „https://de.cppreference.com/mwiki/index.php?title=cpp/memory/allocator/allocate&oldid=27225“