HVKBD_FLAG_POLLING
sc->sc_flags |= HVKBD_FLAG_POLLING;
sc->sc_flags &= ~HVKBD_FLAG_POLLING;
if (sc->sc_flags & HVKBD_FLAG_POLLING)
sc->sc_flags &= ~(HVKBD_FLAG_POLLING | HVKBD_FLAG_COMPOSE);
if ((sc->sc_flags & HVKBD_FLAG_POLLING) == 0)
if ((sc->sc_flags & HVKBD_FLAG_POLLING) != 0)