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From: francis@daisy.uchicago.edu (Francis Stracke)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Shared memory
Message-ID: <1990Nov26.191428.28440@midway.uchicago.edu>
Date: 26 Nov 90 19:14:28 GMT
References: <1CE00001.6q9i4t@tbomb.ice.com>
Sender: news@midway.uchicago.edu (News Administrator)
Organization: Mathematics Department, University of Chicago
Lines: 22

In article <1CE00001.6q9i4t@tbomb.ice.com> time@tbomb.ice.com writes:
>
>In article <3171@cernvax.cern.ch>, marty@cernvax.cern.ch (hugues marty) writes:
>> Is there a way of having shared memory? I don't want to use a driver.
[...]
>Second, you need to determine your memory requirements. If they are
>very small ( < 2048 ) then you can usually the system heap space from
>within an application, but if the requirements are large (> 4K), then
>you will need some type of INIT to get the space at boot time.
>
>Third, if you wind up needing an INIT, you may as well write a driver!

Why? The memory allocation can be done without code, using
the 'sysz' resource.  What else do you really need? (I suppose the
INIT might have trouble writing a file... But maybe you could check
through the system heap for a block of the right size containing
some sort of signature your INIT had put in.)

| Francis Stracke		| My opinions are my own.  I don't steal them.|
| Department of Mathematics	|=============================================|
| University of Chicago		| Until you stalk and overrun,	     	      |
| francis@zaphod.uchicago.edu	|  you can't devour anyone. -- Hobbes 	      |