std::allocator::allocate

 

C++

Idioma

Conceptos

Utilidades de la biblioteca

Strings biblioteca

Contenedores biblioteca

Algoritmos biblioteca

Los iteradores biblioteca

Numéricos biblioteca

Entrada / salida de la biblioteca

Localizaciones biblioteca

Expresiones biblioteca Regular (C++11)

Operaciones de biblioteca Atómica (C++11)

Tema Biblioteca de ayuda (C++11)

 

Gestión de memoria dinámica

Bajo la gestión de memoria de nivel
Los asignadores Original: Allocators The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
allocator
allocator_traits (C++11)
allocator_arg_t (C++11)
allocator_arg (C++11)
uses_allocator (C++11)
scoped_allocator_adaptor (C++11)
Inicializar el almacenamiento Original: Uninitialized storage The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
uninitialized_copy
uninitialized_copy_n (C++11)
uninitialized_fill
uninitialized_fill_n
raw_storage_iterator
get_temporary_buffer
return_temporary_buffer
Punteros inteligentes Original: Smart pointers The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
unique_ptr (C++11)
shared_ptr (C++11)
weak_ptr (C++11)
auto_ptr (obsoleto)
owner_less (C++11)
enable_shared_from_this (C++11)
bad_weak_ptr (C++11)
default_delete (C++11)
Garbage soporte colección Original: Garbage collection support The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
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)
Varios Original: Miscellaneous The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
pointer_traits (C++11)
addressof (C++11)
align (C++11)
C Library Original: C Library The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
malloc calloc	realloc free

 

std::allocator

Las funciones miembro Original: Member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

allocator::allocator

allocator::~allocator

allocator::address

allocator::allocate

allocator::deallocate

allocator::max_size

allocator::construct

allocator::destroy

Terceros funciones Original: Non-member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

operator== operator!=

 

pointer allocate( size_type n, std::allocator<void>::const_pointer hint = 0 );

Asigna n * sizeof(T) bytes de almacenamiento sin inicializar llamando ::operator new(std::size_t), pero es sin especificar cuándo y cómo esta función se llama. El hint puntero puede ser utilizado para proporcionar localidad de referencia: el asignador, si es compatible con la aplicación, intentará asignar el nuevo bloque de memoria lo más cerca posible a 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.

The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

Parámetros

n	-	el número de objetos a asignar almacenamiento para Original: the number of objects to allocate storage for The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
hint	-	puntero a una ubicación de memoria cercano Original: pointer to a nearby memory location The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Valor de retorno

Puntero al primer byte de un bloque de memoria convenientemente alineada y suficiente para contener una matriz de objetos n de 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.

The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

Excepciones

Lanza std::bad_alloc si la asignación no .

Original:

Throws std::bad_alloc if allocation fails.

The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

Ver también

allocate [estático]	asigna almacenamiento sin inicializar utilizando el asignador Original: allocates uninitialized storage using the allocator The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (miembro estático público of std::allocator_traits función)