SWF_ENABLE
sdp->swd_flags |= (SWF_INUSE|SWF_ENABLE);
sdp->swd_flags &= ~SWF_ENABLE;
sdp->swd_flags |= SWF_ENABLE;
if ((sdp->swd_flags & (SWF_INUSE|SWF_ENABLE)) == 0)
if ((sdp->swd_flags & SWF_ENABLE) == 0)
if ((sdp->swd_flags & (SWF_INUSE|SWF_ENABLE)) == 0) {