Re: Some experience with the igc branch

[Eli Zaretskii <eliz@gnu.org>]

> From: Benjamin Riefenstahl <b.riefenstahl@turtle-trading.net>
> Cc: pipcet@protonmail.com,  gerd.moellmann@gmail.com,  ofv@wanadoo.es,
>   emacs-devel@gnu.org,  eller.helmut@gmail.com,  acorallo@gnu.org
> Date: Tue, 24 Dec 2024 10:48:34 +0200
> 
> Eli Zaretskii writes:
> > Emacs on Windows emulates some Posix signals (SIGPROF, SIGCHLD,
> > SIGALRM), so this affects the Windows build as well.
> 
> That's interesting.  But does this emulation have the same constraints
> as POSIX signals have?

If it's a useful emulation, it must somehow generate an asynchronous
event, and then arrange for that event to call the signal handler.
Right?  So the constraints we are talking about, which have to do with
the fact that the signal handlers are invoked asynchronously, are
definitely relevant for this emulation (or any useful emulation),
because the problem we discuss here is the situation where the signal
handler is invoked while MPS holds the arena lock.