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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: Redirecting standard output
Date: Thu, 21 Apr 2011 12:15:01 -0400
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In-reply-to: <m3liz34ng6.fsf@quimbies.gnus.org> (message from Lars Magne
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> From: Lars Magne Ingebrigtsen <larsi@gnus.org>
> Date: Thu, 21 Apr 2011 17:46:17 +0200
> 
> I added a interruptible_wait_for_termination function, which will
> probably not work on NT, since I have no idea how to do that.

It seems like the Windows version is already interruptible, see
w32proc.c:sys_wait (wait_for_termination calls `wait' on Windows, but
`wait' is a macro that resolves to sys_wait).  It calls a Windows API
that allows to specify a timeout, and we set that timeout to 1 sec.
So Emacs on Windows checks for QUIT roughly once a second.