KEVENT_POLL
r = KEVENT_POLL(kq, &kev, 1, &ts);
r = KEVENT_POLL(kq, &kev, 1, &ts);
r = KEVENT_POLL(kq, &kev, 1, &ts);
r = KEVENT_POLL(kq, &kev, 1, &ts);
r = KEVENT_POLL(kq, &kev, 1, &ts);
r = KEVENT_POLL(kq, &kev[0], 1, &ts);