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<H1>[MUD-Dev] Re: atomic functions</H1>
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<LI><em>To</em>: <A HREF="mailto:mud-dev#kanga,nu">mud-dev#kanga,nu</A></LI>
<LI><em>Subject</em>: [MUD-Dev] Re: atomic functions </LI>
<LI><em>From</em>: J C Lawrence <<A HREF="mailto:claw#under,engr.sgi.com">claw#under,engr.sgi.com</A>></LI>
<LI><em>Date</em>: Wed, 06 May 1998 11:44:18 -0700</LI>
<LI><em>Reply-To</em>: <A HREF="mailto:mud-dev#kanga,nu">mud-dev#kanga,nu</A></LI>
<LI><em>Sender</em>: "Petidomo List Agent -- Kanga.Nu version" <<A HREF="mailto:petidomo#kanga,nu">petidomo#kanga,nu</A>></LI>
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<PRE>
On Sat, 2 May 1998 03:41:43 -5
Jon A Lambert<jlsysinc#ix,netcom.com> wrote:
> On 30 Apr 98 at 3:59, Felix A. Croes wrote:
> Very interesting. J.C. has been quite convincing and has opened my
> eyes to many good ideas in this area.
<slick> <click> <click>
<<damn nerf gun is outta bullets>>
> I'm adopting something I've dubbed S&S or Spin-Lock and Swizzle. In
> essence a multithreaded locking system. But ignoring this
> implementation detail, the language implementation is more relevant
> here.
...deletia...
> foo()
> {
> /* code fragment 1 */
> event bar(); /* bar is sceduled for execution as an atomic
> function or independent event. Execution
> foo() is not suspended but continues
> */
> bar(); /* executes bar() as a normal function bar is part of foo */
> /* code fragment 3 */
> }
> bar()
> {
> /* code fragment 3 */
> }
> Either foo() or bar() may be events or normal functions. Whether
> they are atomic events scheduled for independent execution is
> dependent on how they are called. Commits are done on successful
> event completion. Rollbacks are done on event failure.
Problem:
Foo() executes, and launches bar() as a seperate execution thread.
Foo() then fails C&C (S&S?).
What happens to the launched bar()?
Foo() reschedules, does it launch a new bar()?
> I think the difference may lie in that your atomic is more like:
...deletia...
> Whilst mine is:
...deletia...
> No? More comments?
At some point data changes have to be commited. Given the rollback
and reschedule aspect of the C&C approach, on what logical basis can
you have nested commit structures or event fork()s _prior_ to commit?
Now if you mutate the C&C premise in some interesting fashion, (you
never did really explain the basics of S&S), you can certainly do it
-- but now you are talking about a whole different commit model.
Essentially we are talking about the sematics and grammar of data
state changes, and that grammar has to be logicially demonstrable.
--
J C Lawrence Internet: claw#null,net
(Contractor) Internet: coder#ibm,net
---------(*) Internet: claw#under,engr.sgi.com
...Honourary Member of Clan McFud -- Teamer's Avenging Monolith...
--
MUD-Dev: Advancing an unrealised future.
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<li><strong><A NAME="00551" HREF="msg00551.html">[MUD-Dev] Re: atomic functions</A></strong>
<ul compact><li><em>From:</em> "Jon A. Lambert" <jlsysinc#ix,netcom.com></li></ul>
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<UL><LI><EM>From:</EM> "Jon A. Lambert" <jlsysinc#ix,netcom.com></LI></UL></LI>
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<ul><li>Thread context:
<BLOCKQUOTE><UL>
<LI><strong><A NAME="00256" HREF="msg00256.html">[MUD-Dev] atomic functions</A></strong>,
Felix A. Croes <a href="mailto:felix#xs1,simplex.nl">felix#xs1,simplex.nl</a>, Thu 30 Apr 1998, 02:00 GMT
<UL>
<LI><strong><A NAME="00278" HREF="msg00278.html">[MUD-Dev] Re: atomic functions</A></strong>,
Shawn Halpenny <a href="mailto:malachai#iname,com">malachai#iname,com</a>, Thu 30 Apr 1998, 20:19 GMT
<UL>
<LI><strong><A NAME="00406" HREF="msg00406.html">[MUD-Dev] Re: atomic functions</A></strong>,
J C Lawrence <a href="mailto:claw#under,engr.sgi.com">claw#under,engr.sgi.com</a>, Tue 05 May 1998, 17:53 GMT
</LI>
</UL>
</LI>
<LI><strong><A NAME="00322" HREF="msg00322.html">[MUD-Dev] Re: atomic functions</A></strong>,
Jon A. Lambert <a href="mailto:jlsysinc#ix,netcom.com">jlsysinc#ix,netcom.com</a>, Sat 02 May 1998, 07:39 GMT
<UL>
<LI><strong><A NAME="00427" HREF="msg00427.html">[MUD-Dev] Re: atomic functions</A></strong>,
J C Lawrence <a href="mailto:claw#under,engr.sgi.com">claw#under,engr.sgi.com</a>, Wed 06 May 1998, 18:45 GMT
<UL>
<LI><strong><A NAME="00551" HREF="msg00551.html">[MUD-Dev] Re: atomic functions</A></strong>,
Jon A. Lambert <a href="mailto:jlsysinc#ix,netcom.com">jlsysinc#ix,netcom.com</a>, Wed 13 May 1998, 19:54 GMT
<UL>
<LI><strong><A NAME="00612" HREF="msg00612.html">[MUD-Dev] Re: atomic functions</A></strong>,
J C Lawrence <a href="mailto:claw#under,engr.sgi.com">claw#under,engr.sgi.com</a>, Fri 15 May 1998, 20:30 GMT
</LI>
</UL>
</LI>
</UL>
</LI>
</UL>
</LI>
<LI><strong><A NAME="00404" HREF="msg00404.html">[MUD-Dev] Re: atomic functions</A></strong>,
J C Lawrence <a href="mailto:claw#under,engr.sgi.com">claw#under,engr.sgi.com</a>, Tue 05 May 1998, 16:53 GMT
</LI>
</UL>
</LI>
<LI><strong><A NAME="00254" HREF="msg00254.html">[MUD-Dev] Re: Mud-Client, and specifically, COOLMud and SFWhite</A></strong>,
Jay Sax <a href="mailto:cimri1#gte,net">cimri1#gte,net</a>, Thu 30 Apr 1998, 01:41 GMT
</LI>
</UL></BLOCKQUOTE>
</ul>
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