SC_A_ACTIVE
if (sc->sc_open == 0 && (sc->sc_active & SC_A_ACTIVE) != 0)
while (sc->sc_open == 0 && (sc->sc_active & SC_A_ACTIVE) != 0)
if ((active & SC_A_ACTIVE) == 0) {
if ((active & SC_A_ACTIVE) == 0)