ev_break
EV_API_DECL void ev_break (EV_P_ int how EV_CPP (= EVBREAK_ONE)) EV_THROW; /* break out of the loop */
EV_INLINE void ev_unloop (EV_P_ int how ) { ev_break (EV_A_ how ); }
ev_break(ctx, EVBREAK_ONE);
ev_break(ctx, EVBREAK_ONE);