Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cwjcc!tut.cis.ohio-state.edu!ucbvax!hoptoad!tim
From: tim@hoptoad.uucp (Tim Maroney)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Integer Size problem
Message-ID: <8377@hoptoad.uucp>
Date: 24 Aug 89 01:16:47 GMT
References: <15141@dartvax.Dartmouth.EDU> <11689@cit-vax.Caltech.Edu> <1465@draken.nada.kth.se>
Reply-To: tim@hoptoad.UUCP (Tim Maroney)
Organization: Eclectic Software, San Francisco
Lines: 30

In article <11689@cit-vax.Caltech.Edu> palmer@tybalt.caltech.edu.UUCP
(David Palmer) writes:
>A better way, clearer and probably faster, however is to just do:
>	**(rect **)myHandle = myRect;
>You don't have to lock anything down, it is a single easy to understand

In article <1465@draken.nada.kth.se> d88-jwa@nada.kth.se (Jon W{tte) writes:
>Wrong. Incorrect. What happens if a interrupt happens between the set
>pointers and the block move instruction ? And this interrupt happens
>to shuffle memory ? LOCK THE HANDLES first ! ALWAYS !

Wrong.  Incorrect.  Interrupts are forbidden to shuffle memory.  Lock
handles only when you need to; you risk fragmenting the heap otherwise.

>>	**myhandle.boundrect = myRect;
>>		/* ^ or whatever the element name is */
>
>Both Inside Mac and the TechNotes tell us no to change any fields in
>windows or GrafPorts directly. But since everybody's doing it, they
>won't DARE change anything :-)

So?  He's not changing anything in a window or graphics port, he's
changing something in a window template resource.  If the difference
isn't clear to you, I recommend re-reading the Window Manager chapter
of Inside Mac.
-- 
Tim Maroney, Mac Software Consultant, sun!hoptoad!tim, tim@toad.com

"The time is gone, the song is over.
 Thought I'd something more to say." - Roger Waters, Time