TD_XCHG_CONTEXT_NO_FREED
TD_XCHG_CONTEXT_NO_FREED(tiRoot) = 0;
TD_XCHG_CONTEXT_NO_FREED(tiRoot) = TD_XCHG_CONTEXT_NO_FREED(tiRoot) +1;
TD_XCHG_CONTEXT_NO_FREED(tiRoot) = TD_XCHG_CONTEXT_NO_FREED(tiRoot) +1;