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std::allocator::allocate

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< cpp‎ | memory‎ | allocator

 
 
Gerenciamento de memória dinâmica
Gerenciamento de memória de baixo nível
Alocadores
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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)
Uninitialized armazenamento
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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
Ponteiros inteligentes
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Smart pointers
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unique_ptr(C++11)
shared_ptr(C++11)
weak_ptr(C++11)
auto_ptr(obsoleta)
owner_less(C++11)
enable_shared_from_this(C++11)
bad_weak_ptr(C++11)
default_delete(C++11)
Apoio a coleta de lixo
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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)
Diversos
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Miscellaneous
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pointer_traits(C++11)
addressof(C++11)
align(C++11)
C Library
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C Library
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std::allocator
Funções de membro
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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
Não-membros funções
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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 );
Aloca n * sizeof(T) bytes de armazenamento não inicializado chamando ::operator new(std::size_t), mas é não especificado quando e como esta função é chamada. O hint ponteiro pode ser usado para fornecer localidade de referência: o alocador, se suportado pela implementação, tentará alocar o novo bloco de memória tão próximo quanto possível para 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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Índice

[editar] Parâmetros

n -
o número de objetos para alocar memória para
Original:
the number of objects to allocate storage for
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hint -
ponteiro para uma localização de memória nas proximidades
Original:
pointer to a nearby memory location
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[editar] Valor de retorno

Ponteiro para o primeiro byte de um bloco de memória adequadamente alinhado e suficiente para manter uma matriz de objetos de n T tipo.
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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[editar] Exceções

Lança std::bad_alloc se alocação falhar.
Original:
Throws std::bad_alloc if allocation fails.
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[editar] Veja também

[estática]
aloca não inicializado de armazenamento usando o alocador
Original:
allocates uninitialized storage using the allocator
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(of std::allocator_traits função public static membro) [edit]