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std::malloc

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< cpp‎ | memory‎ | c

 
 
Biblioteca de utilitários
Digite apoio (basic types, RTTI, type traits)
Gerenciamento de memória dinâmica
De tratamento de erros
Utilidades do programa
Variadic funções
Data e hora
Objetos de função
initializer_list(C++11)
bitset
hash(C++11)
Os operadores relacionais
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Relational operators
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rel_ops::operator!=
rel_ops::operator>
rel_ops::operator<=
rel_ops::operator>=
Pares e tuplas
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Pairs and tuples
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pair
tuple(C++11)
piecewise_construct_t(C++11)
piecewise_construct(C++11)
Troque, avançar e avançar
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Swap, forward and move
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swap
forward(C++11)
move(C++11)
move_if_noexcept(C++11)
declval(C++11)
 
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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malloc
calloc
 
Defined in header <cstdlib>
void* malloc( std::size_t size );
Aloca size bytes de armazenamento não inicializado.
Original:
Allocates size bytes of uninitialized storage.
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Se a alocação for bem sucedida, retorna um ponteiro para o byte mais baixo (primeiro) no bloco de memória alocada que é adequadamente alinhado para qualquer tipo de objeto.
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If allocation succeeds, returns a pointer to the lowest (first) byte in the allocated memory block that is suitably aligned for any object type.
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Se size é zero, o comportamento é implementação definida (ponteiro nulo pode ser devolvida, ou algum ponteiro não nulo pode ser retornado que não pode ser utilizado para aceder a armazenamento)
Original:
If size is zero, the behavior is implementation defined (null pointer may be returned, or some non-null pointer may be returned that may not be used to access storage)
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Índice

[editar] Parâmetros

size -
número de bytes para alocar
Original:
number of bytes to allocate
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[editar] Valor de retorno

Ponteiro para o início da memória recém-alocado ou ponteiro nulo se o erro ocorreu. O ponteiro deve ser desalocado com free().
Original:
Pointer to the beginning of newly allocated memory or null pointer if error has occurred. The pointer must be deallocated with free().
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[editar] Notas

Esta função não chamar construtores ou inicializar a memória de qualquer forma. Assim, o método preferido de alocação de memória, é a expressão new.
Original:
This function does not call constructors or initialize memory in any way. Thus preferred method of memory allocation is new expression.
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[editar] Exemplo

[editar] Veja também

funções de alocação
Original:
allocation functions
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(função) [edit]
Obtém o armazenamento não inicializado
Original:
obtains uninitialized storage
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(modelo de função) [edit]
C documentation for malloc