Path: utzoo!mnetor!uunet!lll-winken!csustan!polyslo!rducky!jrp
From: jrp@rducky.UUCP (JIM PICKERING)
Newsgroups: comp.unix.questions
Subject: Re: Dining Philosopher Program Posted
Message-ID: <111@rducky.UUCP>
Date: 6 Apr 88 15:27:01 GMT
References: <110@rducky.UUCP>
Organization: Technical Solutions, Arroyo Grande, Ca.
Lines: 47
Keywords: SV semaphores, process synchronization, Dijkstra
Summary: won't work on BSD unless IPC package installed

In article <110@rducky.UUCP>, jrp@rducky.UUCP (JIM PICKERING) writes:
> For those of you who requested the 'Dining Philosophers' program ... it has
> been posted to comp.sources.misc.
> 
> For those of you who don't know what I'm referring to ... see following:
> 
> /***********************************************************************/
> /**                             PHIL.C                                **/
> /**                                                                   **/
> /**  DESCRIPTION:  This file contains a program which demonstrates    **/
> /**   Dijkstra's Dining Philosophers Problem (see "Cooperating        **/
> /**   Sequential Processes," Technical Report EWD-123, Technological  **/
> /**   University, Eindhoven, The Netherlands, (1965)).  It is con-    **/
> /**   sidered a classic process synchronization problem.  It is       **/
> /**   implemented using SVR2 semaphores and curses.  With this as an  **/

I forgot to mention (for the novices) that most BSD systems do not have the
SV Interprocess Communication Package (SUN offers it as an option, I believe).
Obviously it won't run on BSD machines.

Also other Unix flavors do not have IPCs.  The IPC Package became available
on System V (Release 2 ????).

If you have the /usr/include/sys/ipc.h and /usr/include/sys/sem.h files,
you have SV IPC's.












jim





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