TD_XCHG_STATE_ACTIVE
if (TD_XCHG_GET_STATE(ttdsaXchg) == TD_XCHG_STATE_ACTIVE)
if (TD_XCHG_GET_STATE(ttdsaXchg) == TD_XCHG_STATE_ACTIVE)
TD_XCHG_SET_STATE(ttdsaXchg, TD_XCHG_STATE_ACTIVE);
if(TD_XCHG_GET_STATE(ttdsaXchg) != TD_XCHG_STATE_ACTIVE)