DBUF_DMCS
rp->flags |= DBUF_DMCS;
if ((rp->flags & DBUF_DMCS) == 0) {
rp->flags |= (DBUF_DMCS);
if ((rp->flags & DBUF_DMCS) == 0)
if ((rp->flags & DBUF_DMCS) == 0)
rp->flags &= ~DBUF_DMCS;