55     RETURN_OK_IF(mState != State::INIT);  in open()
70     mState = State::IDLE;  in open()
80     RETURN_IF(mState == State::INIT, EX_ILLEGAL_STATE, "alreadyClosed");  in reopen()
91         RETURN_OK_IF(mState == State::INIT);  in close()
92         RETURN_IF(mState == State::PROCESSING, EX_ILLEGAL_STATE, "closeAtProcessing");  in close()
93         mState = State::INIT;  in close()
231     *state = mState;  in getState()
237     RETURN_IF(mState == State::INIT, EX_ILLEGAL_STATE, "instanceNotOpen");  in command()
241             RETURN_OK_IF(mState == State::PROCESSING);  in command()
243             mState = State::PROCESSING;  in command()
250             RETURN_OK_IF(mState == State::IDLE);  in command()
251             mState = State::IDLE;  in command()
263                  << " transfer to state: " << toString(mState);  in command()
330         if (mState != State::PROCESSING) {  in process()
332                        << " skip process in state: " << toString(mState);  in process()