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std::align

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Defined in header <memory>
void* align( std::size_t alignment,

             std::size_t size,
             void*& ptr,

             std::size_t& space );
(a partir do C++ 11)
Se é possível encaixar size bytes de armazenamento alinhado por alignment no buffer apontado por ptr com space comprimento, a função modifica ptr para apontar para o primeiro endereço de armazenamento possível alinhada tal e diminui space pelo número de bytes para o alinhamento. Se é impossível (o buffer é muito pequeno), align não faz nada.
Original:
If it is possible to fit size bytes of storage aligned by alignment into the buffer pointed to by ptr with length space, the function modifies ptr to point to the first possible address of such aligned storage and decreases space by the number of bytes used for alignment. If it is impossible (the buffer is too small), align does nothing.
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Índice

[editar] Parâmetros

alignment -
o alinhamento desejado
Original:
the desired alignment
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size -
o tamanho do armazenamento a serem alinhados
Original:
the size of the storage to be aligned
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ptr -
ponteiro para armazenamento contíguo de pelo menos space bytes
Original:
pointer to contiguous storage of at least space bytes
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space -
o tamanho da memória tampão na qual operar
Original:
the size of the buffer in which to operate
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[editar] Valor de retorno

O valor ajustado de ptr, ou valor de ponteiro nulo se o espaço dado é muito pequeno.
Original:
The adjusted value of ptr, or null pointer value if the space provided is too small.
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[editar] Exemplo

[editar] Veja também

alignof operator queries alignment requirements of a type (a partir do C++ 11) [edit]
alignas especificador
especifica que o armazenamento para a variável devem ser alinhados por (C++11) quantidade específica
Original:
specifies that the storage for the variable should be aligned by specific amount (C++11)
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[edit]
define o tipo adequado para utilização como armazenamento não inicializada para tipos de determinado tamanho
Original:
defines the type suitable for use as uninitialized storage for types of given size
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(modelo de classe) [edit]