Path: utzoo!attcan!uunet!husc6!cmcl2!vx2!spector
From: spector@vx2.GBA.NYU.EDU (David HM Spector)
Newsgroups: comp.sys.mac.programmer
Subject: Re: cdev question
Message-ID: <6860011@vx2.GBA.NYU.EDU>
Date: 26 Jul 88 00:36:00 GMT
References: <9516@dartvax.Dartmouth.EDU>
Organization: New York University
Lines: 27

I am note sure if the file permissions will help you any... but one  other
way to make sure that your cDev can access the file is to have the both the 
cdev and the da close their common file whenever they recieve and deactivate 
events and reopen it when they're brought to the front againt.  This is 
guarenteed to work because your da and the control panel cannot both be 
frontmost at the same time.....

Deactivate events are good times to save data files and configurations anyway..
you never know what some obnoxious application is going to do to you when 
you're not looking. :-)  The only problem is that you'll have to "suspend"
whatever you're doing when you get deactivated... unless you can come up with 
either a clever semaphore or perhaps just trying to re-open the file every 
now and then while you're not front most, and if you get a file locked error
then your cDev must be awake and accessing the file.

jsut a few Q&D ideas...hope that helps a little...

_David
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David HM Spector				New York University
Senior Systems Programmer			Graduate School of Business
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