EVBREAK_ONE
if (loop_done == EVBREAK_ONE)
EV_API_DECL void ev_break (EV_P_ int how EV_CPP (= EVBREAK_ONE)) EV_THROW; /* break out of the loop */
#define EVUNLOOP_ONE EVBREAK_ONE
ev_break(ctx, EVBREAK_ONE);
ev_break(ctx, EVBREAK_ONE);