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From: stew@endor.UUCP
Newsgroups: comp.sys.mac
Subject: Handling Out-of-memory right
Message-ID: <1518@husc6.UUCP>
Date: Sat, 28-Mar-87 19:18:34 EST
Article-I.D.: husc6.1518
Posted: Sat Mar 28 19:18:34 1987
Date-Received: Sun, 29-Mar-87 10:27:55 EST
Sender: news@husc6.UUCP
Reply-To: stew@endor.UUCP (Stew Rubenstein)
Organization: Aiken Computation Lab Harvard, Cambridge, MA
Lines: 17


Anyone have any suggestions for handling out-of-memory conditions
which occur during QuickDraw operations properly?  I am already
doing things like allocating a buffer which is released by a
growZone function and, of course, checking all my memory management
functions error returns.  Unfortunately, things like UnionRgn
will just crash if they run out of memory, and I know of no good
way to tell in advance if there is enough memory for them...
For example, the Union of two disjoint rectangular regions
takes much more memory than the two regions by themselves.

I feel that the designers of Quickdraw screwed up in a big
way by not returning an error code from these functions.
In fact, all drawing routines are potential problems if you
are accumulating a picture, region, or polygon...

What solutions do other developers use for this problem?