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From: bin@primate.wisc.edu (Brain in Neutral)
Newsgroups: comp.sys.mac.programmer
Subject: Re: HLock Function List
Message-ID: <3955@uakari.primate.wisc.edu>
Date: 21 Feb 91 01:17:00 GMT
References: <12178@goofy.Apple.COM>
Sender: bin@primate.wisc.edu
Reply-To: bin@primate.wisc.edu
Lines: 23

From article <12178@goofy.Apple.COM>, by lsr@Apple.com (Larry Rosenstein):
> I think this is being overly cautious.  There's no way, for example, that
> SetRect, SetPt, HLock, BlockMore (to name a few) will ever move memory.  

OK.  Let Apple release an Official List of routines that Will Never
Move Memory.

> Someone once mentioned that InitGraf used to be off the list, but now is on
> the list.  Sure enough, it's not mentioned in volume 1 but is mentioned in
> volume 5.  But are there other calls that were made unsafe?

The existence of a single call is enough to demonstrate the principle
that it's reasonable to consider all ToolBox calls unsafe.  If it's
happened before, what's to prevent it from happening again?

Personally, I think that it would be a *mistake* for Apple to guarantee
that routine X does not now and never will move memory - that seems to
be the kind of thing that would simply help Apple SW to be painted into
a corner wrt future development.

--
Paul DuBois
dubois@primate.wisc.edu