Sets the non-blocking mode of the acceptor.
void non_blocking( bool mode);
If true
, the acceptor's
synchronous operations will fail with asio::error::would_block
if they are unable to perform the requested operation immediately.
If false
, synchronous
operations will block until complete.
Thrown on failure.
The non-blocking mode has no effect on the behaviour of asynchronous
operations. Asynchronous operations will never fail with the error asio::error::would_block
.