From: Bill Kelly <billk@...>
Date: 2006-03-29T05:48:14+09:00
Subject: Re: timeout when listening with TCPServer

From: "Joel VanderWerf" <vjoel@path.berkeley.edu>
> Bill Kelly wrote:
>> From: "Eric Hodel" <drbrain@segment7.net>
>>>
>>> On Mar 28, 2006, at 9:48 AM, Shea Martin wrote:
>>>
>>>> I want to listen for connections for 2 seconds, then timeout.  Do I 
>>>> have  to use the Timeout module?
>>>
>>> That will be the easiest way.
>>>
>>> Timeout.timeout 2 do
>>>   Thread.start server.accept do |s| new_connection s end
>>> end
>> 
>> Oh, hey, cool.  Using the thread there looks like it
>> ought to avoid the issue with Timeout firing in the
>> middle of ensure blocks and circumventing them?
>> 
>> I've been avoiding Timeout like "the plague" since
>> running into that behavior.
> 
> But the timeout won't stop the thread.

I don't think it was supposed to.  The #accept is
happening as an argument to Thread.start, so the thread
won't be started until the connection is accepted.

The only teeny race condition I can see is if the
timeout fires after server.accept but before 
Thread.start is invoked.  That would seem to leak
the socket - but the GC would normally reclaim it
eventually (except in cases where it wouldn't. :)


Regards,

Bill