Varianti

    std::allocator::allocate

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    <metanoindex/>

     
    C++
     
    Gestione della memoria dinamica
    Basso livello di gestione della memoria
    Allocatori
    Original:
    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)
    Non inizializzata stoccaggio
    Original:
    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
    Puntatori intelligenti
    Original:
    Smart pointers
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    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
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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)
    Varie
    Original:
    Miscellaneous
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    pointer_traits(C++11)
    addressof(C++11)
    align(C++11)
    C Library
    Original:
    C Library
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    std::allocator
    Membri funzioni
    Original:
    Member functions
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    allocator::allocator
    allocator::~allocator
    allocator::address
    allocator::allocate
    allocator::deallocate
    allocator::max_size
    allocator::construct
    allocator::destroy
    Non membri funzioni
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    Non-member functions
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    operator==
    operator!=
     
    <tbody> </tbody>
    pointer allocate( size_type n, std::allocator<void>::const_pointer hint = 0 );
    Assegna n * sizeof(T) byte di memoria non inizializzata chiamando ::operator new(std::size_t), ma è specificato quando e come questa funzione viene chiamata. Il hint puntatore può essere usato per fornire frazione di riferimento: l'allocatore, se supportato dall'implementazione, tenterà di allocare il nuovo blocco di memoria più vicino possibile al 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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    Parametri

    n -
    il numero di oggetti da allocare memoria per
    Original:
    the number of objects to allocate storage for
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    hint -
    puntatore a una posizione di memoria nelle vicinanze
    Original:
    pointer to a nearby memory location
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    Valore di ritorno

    Puntatore al primo byte di un blocco di memoria opportunamente allineati e sufficiente per contenere un array di oggetti di 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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    Eccezioni

    Genera std::bad_alloc se allocazione non riesce.
    Original:
    Throws std::bad_alloc if allocation fails.
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    Vedi anche

    [statico]
    alloca memoria non inizializzata utilizzando l'allocatore
    Original:
    allocates uninitialized storage using the allocator
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    (metodo pubblico statico) [modifica]