Re: Patch to trunk: merge common code in hourglass impl

[Eli Zaretskii]

> Date: Wed, 04 Jun 2008 10:31:29 +0100
> From: Jason Rumney <address@hidden>
> Cc: Adrian Robert <address@hidden>,
>       emacs- devel <address@hidden>
> 
> Stefan Monnier wrote:
> >> - Under W32, atimers are not currently used, so the common code cannot be
> >> either.  If atimers will work under W32, then the patch can be  improved to
> >> benefit W32 as well.
> >>     
> >
> > It would be good to know if the avoidance of atimers was done
> > on purpose.  Eli?  Jason?
> >   
> 
> I don't think atimers are supported on Windows. My understanding is that 
> they require signals.

Yes, atimers work by sending SIGALRM, which isn't supported on
Windows.  While Windows has equivalent functionality, no one stepped
forward to emulate atimers, probably because their use in Emacs is
quite limited, and in areas where Windows offers alternate ways of
doing the same.