UATH_FLAG_RUNNING
sc->sc_flags |= UATH_FLAG_RUNNING;
sc->sc_flags &= ~UATH_FLAG_RUNNING; /* STOP */
sc->sc_flags |= UATH_FLAG_RUNNING;
sc->sc_flags |= UATH_FLAG_RUNNING;
sc->sc_flags &= ~UATH_FLAG_RUNNING;
sc->sc_flags &= ~UATH_FLAG_RUNNING;
#define UATH_IS_RUNNING(_sc) ((_sc)->sc_flags & UATH_FLAG_RUNNING)