Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!linus!decvax!harpo!seismo!hao!cires!nbires!ut-ngp!utastro!nather From: nather@utastro.UUCP Newsgroups: net.unix-wizards Subject: Re: signals are not IPC! Message-ID: <473@utastro.UUCP> Date: Fri, 15-Jul-83 10:25:45 EDT Article-I.D.: utastro.473 Posted: Fri Jul 15 10:25:45 1983 Date-Received: Sun, 17-Jul-83 00:29:57 EDT References: utzoo.3087 Lines: 11 Inter-process communication: If somebody *does* decide to modify Un*x to permit such communication, please consider the possibility that multiple cpu's may be running different processes that must communicate. Example: assuming only one cpu, a LIFO stack works fine. With 2 cpu's, both with access to the stack pointer, disaster results. A FIFO (mailbox) scheme is ok so long as each cpu has its own pointer. Ed Nather ...ihnp4!kpno!utastro!nather