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From: jsdy@hadron.UUCP (Joseph S. D. Yao)
Newsgroups: net.unix
Subject: Re: Asynchronous I/O on UNIX?
Message-ID: <111@hadron.UUCP>
Date: Sat, 30-Nov-85 19:52:49 EST
Article-I.D.: hadron.111
Posted: Sat Nov 30 19:52:49 1985
Date-Received: Mon, 2-Dec-85 03:31:14 EST
References: <248@well.UUCP> <241@ll-xn.ARPA> <604@unisoft.UUCP>
Reply-To: jsdy@hadron.UUCP (Joseph S. D. Yao)
Organization: Hadron, Inc., Fairfax, VA
Lines: 16
Summary: I've seen one or two ...

I'm afraid this isn't a great response, but:  I've seen one or two
implementations of asynchronous I/O.  One was done by Steve Holmgren
et al at U Ill Champaign-Urbana (U-C?) maybe half a dozen years ago.
Obviously, not based on any current system, nor has it been propagated
much, especially since it was part of a version that completely changed
UNIX.

I vaguely remember an interface; and I don't remember whether this
is from Steve's implementation or not.  Basically, one opens an fd
and posts a signal routine for that fd.  Asread()'s and aswrite()'s
etc. return an object which is compared to (something, I think
retrieved by another system call) at interrupt time.  Not too far
from simple.
-- 

	Joe Yao		hadron!jsdy@seismo.{CSS.GOV,ARPA,UUCP}