NAME¶

nng_aio_count - return number of bytes transferred

SYNOPSIS¶

#include <nng/nng.h>
size_t nng_aio_count(nng_aio *aio);

DESCRIPTION¶

The nng_aio_count() returns the number of bytes transferred by the asynchronous operation associated with the handle aio.

Some asynchronous operations do not provide meaningful data for this function; for example operations that establish connections do not transfer user data (they may transfer protocol data though) — in this case this function will generally return zero.

This function is most useful when used with operations that make use of of a scatter/gather vector (set by nng_aio_set_iov()).

RETURN VALUES¶

The number of bytes transferred by the operation.

ERRORS¶

None.

SEE ALSO¶

nng_aio_alloc(3), nng_aio_result(3), nng_aio_set_iov(3), nng_aio_wait(3), nng_strerror(3), nng_aio(5), nng(7)