pub unsafe extern "C" fn coap_io_prepare_io(
ctx: *mut coap_context_t,
sockets: *mut *mut coap_socket_t,
max_sockets: c_uint,
num_sockets: *mut c_uint,
now: coap_tick_t,
) -> c_uint
pub unsafe extern "C" fn coap_io_prepare_io(
ctx: *mut coap_context_t,
sockets: *mut *mut coap_socket_t,
max_sockets: c_uint,
num_sockets: *mut c_uint,
now: coap_tick_t,
) -> c_uint