USE_TAG_QUEUING
if ((ti->flag & USE_TAG_QUEUING) == 0 &&
ti->flag |= USE_TAG_QUEUING;
ti->flag |= USE_TAG_QUEUING;
ti->flag &= ~USE_TAG_QUEUING;
if ((ti->flag & USE_TAG_QUEUING) != 0)
(ti->flag & USE_TAG_QUEUING) == 0 ||