#include <nng/nng.h> void nng_aio_free(nng_aio *aio);
nng_aio_free() function frees an allocated asynchronous I/O handle.
If any operation is in progress, the operation is canceled, and the
caller is blocked until the operation is completely canceled, to ensure
that it is safe to deallocate the handle and any associated resources.
(This is done by implicitly calling