Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!apple!keith
From: keith@Apple.COM (Keith Rollin)
Newsgroups: comp.sys.mac.programmer
Subject: Re: DA loses resource file on accRun
Keywords: MultiFinder DAs context switches
Message-ID: <33398@apple.Apple.COM>
Date: 23 Jul 89 05:09:05 GMT
References: <1989Jul17.045641.20314@lth.se> <2932@internal.Apple.COM> <14573@dartvax.Dartmouth.EDU> <33359@apple.Apple.COM> <14600@dartvax.Dartmouth.EDU>
Organization: Apple Computer Inc, Cupertino, CA
Lines: 22

In article <14600@dartvax.Dartmouth.EDU> matthews@eleazar.dartmouth.edu (Jim Matthews) writes:
>
>I suppose what I'd like most is to have these decisions documented.  The
>programming model for DAs under MultiFinder may be well thought out, but it
>isn't very clear.  For example: if a DA under MultiFinder calls ModalDialog,
>background apps will continue to get time (since ModalDialog calls either
>GetNextEvent or WaitNextEvent).  But DAs and drivers with dNeedTime lit will
>not get their periodic time.  We have network protocol drivers that time out
>when a DA calls Std File, but *not* when an app does the same thing.  There
>may be a reason for this (avoiding re-entrancy is a likely candidate)
>but I've never seen it documented, much less justified.

Jim, you're just a little ahead of us. In the next batch of technotes that we
are preparing are some that address these very issues. They're already written,
and are being reviewed right now.

------------------------------------------------------------------------------
Keith Rollin  ---  Apple Computer, Inc.  ---  Developer Technical Support
INTERNET: keith@apple.com
    UUCP: {decwrl, hoptoad, nsc, sun, amdahl}!apple!keith
"Argue for your Apple, and sure enough, it's yours" - Keith Rollin, Contusions