Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 6/24/83; site cygnet.UUCP Path: utzoo!watmath!clyde!burl!hou3c!hocda!houxm!houxz!vax135!floyd!cmcl2!seismo!hao!hplabs!cygnet!karl From: karl@cygnet.UUCP (Karl Danz) Newsgroups: net.unix,net.unix-wizards Subject: Re: shared read/write data segment under unix/C Message-ID: <490@cygnet.UUCP> Date: Fri, 8-Jun-84 04:01:20 EDT Article-I.D.: cygnet.490 Posted: Fri Jun 8 04:01:20 1984 Date-Received: Sun, 10-Jun-84 00:32:56 EDT Organization: Cygnet Systems -- Sunnyvale, CA Lines: 16 [] We needed shared memory support in 4.2 and after some investigation realized that Berkeley had started to implement it. (Check out "man page" for mmap system call in the System Manual.) We put in mods to support shared memory using some of the "ifdef'd out" code in the 4.2 distribution as a starting point. Our needs were small enough (less than 100K) that we simply set up a fixed buffer in kernel storage to which we point the page table entries of processes requesting use of the shared memory... crude, but it works for us. If anyone is interested, I can send our mods. Karl Danz Cygnet Systems