ev_set_priority
ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
ev_set_priority (&pipe_w, EV_MAXPRI);
ev_set_priority (&childev, EV_MAXPRI);
ev_set_priority (w, pri);
ev_set_priority (&sigfd_w, EV_MAXPRI);
ev_set_priority (&fs_w, EV_MAXPRI);
ev_set_priority (&w->timer, ev_priority (w));
ev_set_priority (&w->io, ev_priority (w));
ev_set_priority (&w->prepare, EV_MINPRI);
ev_set_priority ((ev), 0); \