AE_FLAG_LINK
if ((sc->ae_flags & AE_FLAG_LINK) == 0) {
sc->ae_flags &= ~AE_FLAG_LINK;
sc->ae_flags &= ~AE_FLAG_LINK;
sc->ae_flags |= AE_FLAG_LINK;
if ((sc->ae_flags & AE_FLAG_LINK) != 0) {
sc->ae_flags &= ~AE_FLAG_LINK;
if ((sc->ae_flags & AE_FLAG_LINK) == 0)