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From: rdominy@kong.gsfc.nasa.gov (Robert Dominy)
Newsgroups: comp.sys.mac.programmer
Subject: MacApp memory mgmt with Callbacks
Message-ID: <4637@dftsrv.gsfc.nasa.gov>
Date: 27 Mar 91 14:51:06 GMT
Sender: news@dftsrv.gsfc.nasa.gov
Distribution: world
Organization: NASA Goddard Space Flight Center
Lines: 18

I'm having trouble with using callback/completion routines for
MacTCP under MacApp.  It seems that under the MacApp memory
management, it is possible that the segment in which my callback
routines are defined can be periodically unloaded.  This of course
kills the program if any such routine is invoked.

What is the proper way of telling MacApp that a Code seqment should
be resident in memory and should not be unloaded?  I tried defining
my own 'seg!' resource as described in the reference manual, but this
did not seem to help.  I was able to define the callback routines as
being in one of MacApp's resident segments (GDebug) which seemed
to work.

Thanks....

-------------------------------
Robert Dominy
NASA Goddard Space Flight Center