hi all,

I use ip::tcp::iostream but I don't know if it is thread safe, and I cannot find the answer in boost document. 

I read from ip::tcp::iostream in the receiver thread, and send request in another thread. 

Now I protected the stream with a mutex. But the problem is that, if I do not send request, the server will not response, 

and the receiver will block on read with lock, and the sender cannot hold the lock and cannot send the request, deadlock.

Is there anyone know that? Please kindly give me an answer.

Best Regards

Zhanwei Wang