From: Bill Kelly <billk@...>
Date: 2006-03-30T02:20:34+09:00
Subject: Re: timeout when listening with TCPServer

From: "Shea Martin" <null@void.0>
> <code>
> Thread.new do
> 
> begin
>   l_exit_status = false
> 
>   l_listener = TCPServer.new( HOST, p_port )
>   l_socket = false
> 
>   Timeout.timeout( 2 ) do
>     l_socket = l_listener.accept
>   end #timeout
> 
>   #use socket
>   l_socket.put "send you requested data"
> 
>   l_exit_status = true
> 
> rescue SocketError
>   $log.puts "socket error"
>   l_exit_status = false
> rescue Timeout::Error
>   $log.puts "you only get 2 seconds to come and get the data"
>   l_exit_status = false
> rescue Errno::EBADF
>   $log.puts "could not open connection"
>   l_exit_status = false
> ensure
>   l_socket.close if l_socket
> end #begin/rescue
> 
>   l_exit_status
> end #thread/do
> </code>
> 
> I don't think I have a race condition here, do I?

I'm not 100% sure myself, because I don't know whether
this assignment:

    l_socket = l_listener.accept
            ^^^

is atomic, or not.

However, I'm not suggesting to worry about it, either.

Practically speaking it seems unlikely to be a problem,
and ruby's garbage collector will generally recover 
orphaned file handles.


Regards,

Bill