SC_OUTWAIT
if (sc->sc_flags & SC_OUTWAIT) {
sc->sc_flags |= SC_OUTWAIT;
sc->sc_flags &= ~SC_OUTWAIT;
sc->sc_flags |= SC_OUTWAIT;
if ((sc->sc_flags & SC_OUTWAIT) != 0) {
sc->sc_flags &= ~SC_OUTWAIT;
sc->sc_flags &= ~SC_OUTWAIT;
sc->sc_flags &= ~SC_OUTWAIT;