Re: CompactMem from a CDA

[unknown@apple.com (Matt Ackeret)]

In article <1tdgh4$qc0@altitude.HIP.CAM.ORG> vandry@CAM.ORG (Phillip Vandry) writes:
>You mean if I won't be making any toolbox or GS/OS calls I don't need to
>lock a block before I use it?? I've been locking them even if I need only
>a word or something.

Yup, that's the case.

>Although... No, it wouldn't work. If a context switch were to occur while I
>was using the block some other process could make it move around.

Yup, you're right!  That's a problem with multitasking on the GS.  If, on
the Mac, their memory manager compacts all heaps and not just the current one,
it'd be a problem there too. 

Having your memory moved out from under you is a scary prospect. Jawaid has 
said that it memory compaction doesn't happen very often on a 4 meg GS, though
it'd sure be nicer if the Memory Manager were able to compact by userid..
(though obviously it would make compacting memory a whole hell of a lot less
useful)
-- 
unknown@apple.com		Apple II Forever
unknown@ucscb.ucsc.edu  These opinions are mine, not Apple's.