std::malloc

 

C++

Linguaggio

Concetti

Libreria di Utilità

Stringhe

Contenitori

Algoritmi

Iteratori

Libreria matematca

Input/output

Localizzazione

Espressioni regolari(C++11)

Operazioni atomicche(C++11)

Multithreading(C++11)

 

Utilità libreria

Tipo di supporto (basic types, RTTI, type traits)

Gestione della memoria dinamica

La gestione degli errori

Programma di utilità

Funzioni variadic

Data e ora

Funzione oggetti

initializer_list (C++11)

bitset

hash (C++11)

Gli operatori relazionali Original: Relational operators The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

rel_ops::operator!= rel_ops::operator> rel_ops::operator<= rel_ops::operator>=

Coppie e tuple Original: Pairs and tuples The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

pair

tuple (C++11)

piecewise_construct_t (C++11)

piecewise_construct (C++11)

Swap, in avanti e spostare Original: Swap, forward and move The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

swap

forward (C++11)

move (C++11)

move_if_noexcept (C++11)

declval (C++11)

 

Gestione della memoria dinamica

Basso livello di gestione della memoria
Allocatori 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)
Non inizializzata stoccaggio 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
Puntatori intelligenti 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 (deprecato)
owner_less (C++11)
enable_shared_from_this (C++11)
bad_weak_ptr (C++11)
default_delete (C++11)
Garbage collection supporto 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)
Varie 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

 

Elemento definito nell'header <cstdlib>
void* malloc(std::size_t size );

Assegna size byte di memoria non inizializzata.

Original:

Allocates size bytes of uninitialized storage.

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In caso di assegnazione ha esito positivo, restituisce un puntatore al più basso del (primo) byte nel blocco di memoria allocata che sia adeguatamente allineato per qualsiasi tipo di oggetto.

Original:

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 è zero, il comportamento è definito di attuazione (puntatore nullo possono essere restituiti, o qualche non-puntatore nullo può essere restituito, che non può essere utilizzato per accedere allo storage)

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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Parametri

size

-

numero di byte da allocare Original: number of bytes to allocate The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Valore di ritorno

Puntatore all'inizio della memoria appena allocata o un puntatore nullo in caso di errore si è verificato. Il puntatore deve essere rilasciata con 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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Note

Questa funzione non chiamare funzioni di costruzione o di inizializzare la memoria in alcun modo. Così metodo preferito di allocazione di memoria è espressione 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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Vedi anche

operator new operator new[]	allocazione funzioni Original: allocation functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (funzione)
get_temporary_buffer	ottiene stoccaggio non inizializzata Original: obtains uninitialized storage The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (funzione di modello)
C documentation for malloc