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From: dan@rna.UUCP (Dan Ts'o)
Newsgroups: net.unix-wizards
Subject: System V shared memory and Ultrix ?
Message-ID: <547@rna.UUCP>
Date: Tue, 23-Sep-86 16:45:49 EDT
Article-I.D.: rna.547
Posted: Tue Sep 23 16:45:49 1986
Date-Received: Wed, 24-Sep-86 05:09:29 EDT
Organization: Rockefeller Neurobiology
Lines: 21

x
	Has anyone used the System V-style shared memory facility in
Ultrix-32m (Microvax II), especially in double-buffered I/O operations ?
For example, the continuous DMA'ing in of data while DMA'ing out to
magtape. one process DMA's into shared memory and then signals the second
process for it to DMA's to magtape while the first process fills the second
buffer.

	Can someone mail me a simple C program in which to processes communicate
using these System V shared memory calls ?  Please educate a poor 4.XBSD user
to the wonders of shared memory. Thanks.

					Cheers,
					Dan Ts'o
					Dept. Neurobiology
					Rockefeller Univ.
					1230 York Ave.
					NY, NY 10021
					212-570-7671
					...cmcl2!rna!dan
					rna!dan@cmcl2.arpa