[Boost-users] [asio]Does the function of async_read can find the tcp connection has closed?

Subject: [Boost-users] [asio]Does the function of async_read can find the tcp connection has closed?
From: lx (lxlenovostar_at_[hidden])
Date: 2014-04-15 00:04:05

hi all:
     I want to know async_read or async_write can detect the tcp connection
has closed, or not?

thank you