The execution order of these two steps below are uncertain:

1. Assignment of 'm_ReadDatathread';
2. The thread runs 'TcpTransport::runThread';

If the thread runs first, the value of m_ReadDatathread will be NULL, the codes inside 'while (m_ReadDatathread) {}' will never be executed, then 'm_event_base_status' will never store 'true', so TcpTransport::connect will stay on the loop infintely.