async_read_some return

Question

Is there a way in Boost::ASIO to know if async_read_some wont return in a particular time period to call a function without closing the socket? Usually async_read_some() wont return if there is no more data to be transfered to the buffer.

 _socket->async_read_some(
     boost::asio::buffer(this->reply, sizeof(this>reply)),
     boost::bind(
         &TCP_IP_Connection::dataProcess,
         this,
         boost::asio::placeholders::error,
         boost::asio::placeholders::bytes_transferred
     )
 );

Answer 1

async_read_some always returns immediately.

If you're talking about the handler (callback), if you close the socket before it returns, then I think the handler gets called with asio::error::operation_aborted . If you handle this scenario then maybe you don't need to worry about if you're connected or not.