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From: mouse@mcgill-vision.UUCP
Newsgroups: comp.unix.wizards
Subject: Re: shared memory in BSD 4.2
Message-ID: <659@mcgill-vision.UUCP>
Date: Fri, 20-Feb-87 09:21:47 EST
Article-I.D.: mcgill-v.659
Posted: Fri Feb 20 09:21:47 1987
Date-Received: Sun, 22-Feb-87 10:36:44 EST
References: <4200@brl-adm.ARPA> <5294@mimsy.UUCP>
Organization: McGill University, Montreal
Lines: 21

In article <5294@mimsy.UUCP>, chris@mimsy.UUCP (Chris Torek) writes:
> In article <4200@brl-adm.ARPA> stevens@anl-mcs.arpa (Rick L. Stevens) writes:
>> Does anyone know how to map memory from two processes ( child and
>> parent) to refer to the same virtual addresses? ...  I have tracked
>> down mmap and munmap ....

> Not implemented yet.  These remain unimplemented in 4.3BSD.

Sigh.  However, I did write code allowing processes to share memory
without using mmap/munmap.  I wrote this for 4.2, but we've gone to 4.3
and I don't have the 4.2 code without groveling through *lots* of
tapes.  If anyone is interested, I can describe what has to be done or
maybe send out the code (I'd have to check some things, like, how much
is really 4.3 code I reused for the purpose).

					der Mouse

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