Minjie

> std::lock_guard is a lightweight alternative to std::unique_lock Why not use the lightweight version for the queue :-)

https://github.com/boldtempleGaming/Engine/blob/8ed73a49777b59f0af1031d9787c7bdaa98ba3cb/CMakeLists.txt#L16 The command **option(USE_LUA ON)** would have no effect to the default value (**ON**), use **option(USE_LUA "some descriptions" ON)** instead Plz take a look at cmake manual: https://cmake.org/cmake/help/v3.0/command/option.html

In file **p_ranger.cc** function: **InterfaceRanger::ProcessMessage()** There are only 2 message supported: ``` PLAYER_RANGER_REQ_GET_CONFIG PLAYER_RANGER_REQ_GET_GEOM ``` there is no `PLAYER_RANGER_DATA_RANGE` implemented