From: MenTaLguY <mental@...>
Date: 2007-11-07T05:48:31+09:00
Subject: Re: Changing date backward messes up threaded sleep

On Wed, 7 Nov 2007 05:23:46 +0900, Gary Wright <gwtmp01@mac.com> wrote:
> Ruby's sleep actually is a request to the thread scheduler to
> stop the current thread until the system clock has reached
> (now + delay).  So if you move the clock backwards, it will take
> that much longer to reach (now + delay).  If you move the clock
> forwards then the thread becomes runnable immediately.

I think this is arguably a bug in the scheduler, but it is not
easy to remedy in a portable way.

-mental