Date: Thu, 27 Jan 94 08:59:34 -0500
From: DJ Delorie <dj AT ctron DOT com>
To: babcock AT cfa DOT harvard DOT edu
Cc: djgpp AT sun DOT soe DOT clarkson DOT edu
Subject: Re: swapping and real-mode callbacks


> On the EMX list, Eberhard Mattes wrote (about EMX):
> > Real-mode callbacks aren't implemented and won't get implemented.  You
> > have to use a commercial DOS extender for that fancy stuff.  In
> > general, it can't work reliably due because MS-DOS is not reentrant
> > and swapping may occur in the callback.

> Is swapping during a real-mode callback a potential problem with go32?

That depends on the callback.  If the callback happens while you're
inside MS-DOS, and the handler is swapped to disk, it could be a
problem.