Path: utzoo!attcan!uunet!mcsun!unido!ira.uka.de!smurf!urlichs
From: urlichs@smurf.ira.uka.de (Matthias Urlichs)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Need info on multitasking capabilities on the mac
Message-ID: <1250@smurf.ira.uka.de>
Date: 25 Nov 89 21:26:00 GMT
References: <6391@tank.uchicago.edu> <9072@hoptoad.uucp> <17247@dartvax.Dartmouth.EDU> <9080@hoptoad.uucp>
Reply-To: urlichs@smurf.ira.uka.de (Matthias Urlichs)
Organization: Smurf-O-Box Karlsruhe, FRG
Lines: 19

In comp.sys.mac.programmer tim@hoptoad.UUCP (Tim Maroney) writes:
< In article <17247@dartvax.Dartmouth.EDU> earleh@eleazar.dartmouth.edu
< (Earle R. Horton) writes:
< 
< I thought that MultiFinder would refuse to context switch if the file
< or device system had any pending asynchronous requests.  But maybe I'm
< thinking of an earlier incarnation.  It's fairly painful to write a
< complete protocol scheduled from completion routines, but it can be
< done.
< 
MF currently checks if the file manager is busy. The device manager is not
checked. So the file I/O requests occur on top of whatever application may be
running at the moment. No problem (but check if you have enough room on the
stack!)
I would not describe running a protocol from completion routines as painful.
It's more like a lot of typing. (I ought to know :-) -- my soon-to-be-released
AppleShare-compatible server works that way.)
-- 
Matthias Urlichs