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From: songer@orchestra.ecn.purdue.edu (Christopher M Songer)
Newsgroups: comp.sys.next
Subject: NeXT equivalent of Shared Memory and Semaphores on SysV
Summary: How to share memory between processes, etc.
Keywords: Shared Memory
Message-ID: <1991Feb21.152540.10679@noose.ecn.purdue.edu>
Date: 21 Feb 91 15:25:40 GMT
Sender: root@noose.ecn.purdue.edu (ECN System Management)
Distribution: usa
Organization: Purdue University Engineering Computer Network
Lines: 16

Hi,
     I'm looking to port a SysV piece of code. The code uses
shared memory extensively. Can memory be shared between processes
on the NeXT, and if so, how? I RTFM and it seemed to imply that
memory can only be shared when there is a parent - child 
relationship between processes. This is not good enough. 
     Nowhere, however, did it say: "Memory cannot be shared between
arbitrary processes on the NeXT computer." So, I figured I'd ask
before scrapping whole boatloads of code. 
     Other questions: is a mutex the best equivalent of a semaphore
in SysV? Assuming there is no shared memory, what would you reccomend
as a method to emulate or replace it?

Thanks!
-Chris
    


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