Re: [Boost-users] Boost.Asio chat example chat_client have 3 connections, what other 2 connections doing?

you can use SysinternalsSuite procexp.exe to watch the Boost.Asio 's chat_client example. in the tcp tab, there are 3 connections. 1 connected to chat server 2 connected to localhost 3 connected to localhost just do it, please. you will find it strange.

You're right. There's active socket_select_interrupter in the client: it uses its own socket to interrupt select().