Path: utzoo!attcan!uunet!lll-winken!lll-tis!helios.ee.lbl.gov!pasteur!ames!decwrl!labrea!polya!kaufman
From: kaufman@polya.Stanford.EDU (Marc T. Kaufman)
Newsgroups: comp.sys.mac
Subject: Re: Changing the pointer icon
Message-ID: <3042@polya.Stanford.EDU>
Date: 10 Jun 88 15:13:54 GMT
References: <5157@eagle.ukc.ac.uk> <2327@spray.CalComp.COM> <6383@cup.portal.com>
Reply-To: kaufman@polya.Stanford.EDU (Marc T. Kaufman)
Organization: Stanford University
Lines: 22

In article <6383@cup.portal.com> David_Alan_Newman@cup.portal.com writes:
>As an aside to this discussion, I thought I'd through out a discovery we
>made earlier this week.

>We found that some DA's, and/or other applications running under MF would
>issue ReleaseResource calls for all the cursors they had used. This would
>in effect 'yank' the system cursors right out from under us! System resources
>are supposed to be shared, image if people started issuing releases for
>WDEF's, CDEF's, etc!

For the paranoid (and I count myself among them) you can DetachResource to make
a private copy of the cursor for yourself.  This avoids having to have copies
in your resource file.

In general, I am not sure what one is supposed to do about shared system
resources.  I don't want them cluttering the heap if I no longer need them, but
I don't want to offend DAs.  Perhaps one should GetResource before EVERY use
of the resource, but mark it purgeable... but then you have to decide what to
do if there is not enough room in the heap to reload it.

At least Cursors are small.

Marc Kaufman (kaufman@polya.stanford.edu)