ev_once
once_cb (EV_P_ struct ev_once *once, int revents)
struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
EV_API_DECL void ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW;