SM_NCQ_TAG_LOCK
tdsmSingleThreadedEnter(smRoot, SM_NCQ_TAG_LOCK);
tdsmSingleThreadedLeave(smRoot, SM_NCQ_TAG_LOCK);
tdsmSingleThreadedEnter(smRoot, SM_NCQ_TAG_LOCK);
tdsmSingleThreadedLeave(smRoot, SM_NCQ_TAG_LOCK);