Asynchronous input and output component of vogro.
Currently, vogro's asynchronous concurrency model relies on boost/asio. As we all know, boost/asio is compatible with many different platforms. This does not match the original intention of vogro. Vogro was originally designed to be compatible with only Linux platforms for maximum performance. And relying on boost/asio makes vogro lack independence. Users must first install the boost package to use vogro. As well as the above considerations, vogro needs to have its own asynchronous input and output concurrent model.