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()).

           Note
           The return value from this function is undefined if the operation has not completed
           yet. Either call this from the handle’s completion callback, or after waiting for the
           operation to complete with nng_aio_wait().

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)

                                            2024-10-11                           NNG_AIO_COUNT(3)