Boost :: asio - 如何中断被阻塞的tcp服务器线程？

I'm working on a multithreaded application in which one thread acts as a tcp server which receives commands from a client. The thread uses a Boost socket and acceptor to wait for a client to connect, receives a command from the client, passes the command to the rest of the application, then waits again. Here's the code:I'm working on a multithreaded application in w