stat_timer_cb
static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
stat_timer_cb (EV_A_ &w->timer, 0);
ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)