Hey Boris!

Please note that the directory monitor (it's from 2008) can be implemented much better today. For example, have a look at this implementation (from 2011): <https://github.com/boostcon/2011_presentations/blob/master/wed/asio_extensions/directory_monitor.cpp>

thanks for answering. I actually saw both implementations (2008 ans 2011) and my question arose from differences from them.

Version from 2011 is single class and NOT an ASIO extension - there is no deriving from basic_io_object or io_service::service. Hence my question: what is the benefit of deriving from those classes and making your class an ASIO extension vs 2011 version where io_service is just used "externally" for synchronization purposes.