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<H1>[MUD-Dev] 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] atomic functions</LI>
<LI><em>From</em>: "Felix A. Croes" <<A HREF="mailto:felix#xs1,simplex.nl">felix#xs1,simplex.nl</A>></LI>
<LI><em>Date</em>: Thu, 30 Apr 1998 03:59:20 +0200 (MET DST)</LI>
<LI><em>Delivery-date</em>: Wed Apr 29 19:00:42 1998</LI>
<LI><em>Delivery-date</em>: Wed, 29 Apr 1998 19:00:42 -0700</LI>
<LI><em>Envelope-to</em>: claw#kanga,nu</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,,,," <<A HREF="mailto:petidomo#kanga,nu">petidomo#kanga,nu</A>></LI>
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<PRE>
Having recently completed the implementation of the generic parsing
utility that I posted about earlier, I am now preparing to convert
my server to the lockless multithreading paradigm put forward on this
list by J.C. Lawrence.
It has occurred to me that the commit-or-fail idea can be applied to
parts of threads as well as entire threads, leading to the following
concept of "atomic functions":
An atomic function is a function that succeeds or fails as a
whole. Any runtime error that is not caught within the function
will lead to the entire function call, with all its effects
and side-effects, being undone.
Atomic functions would be used to enforce consistency -- just like a
thread either fails or succeeds without leaving the mud in an
inconsistent, half-completed state. Of course, every function called
at the beginning of a thread is effectively called atomically, so
code that depends on atomic functions can be replaced by code that
depends on (atomic) threads. The advantage of atomic functions
would be to place the function call within the wider thread
context, which would be similar to imposing an execution order on
threads. Also, calls to atomic functions could be nested.
Comments? Is anyone already using this for his own server?
Felix Croes
--
MUD-Dev: Advancing an unrealised future.
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<li><strong><A NAME="00404" HREF="msg00404.html">[MUD-Dev] Re: atomic functions</A></strong>
<ul compact><li><em>From:</em> J C Lawrence <claw#under,engr.sgi.com></li></ul>
<li><strong><A NAME="00322" HREF="msg00322.html">[MUD-Dev] Re: atomic functions</A></strong>
<ul compact><li><em>From:</em> "Jon A. Lambert" <jlsysinc#ix,netcom.com></li></ul>
<li><strong><A NAME="00278" HREF="msg00278.html">[MUD-Dev] Re: atomic functions</A></strong>
<ul compact><li><em>From:</em> Shawn Halpenny <malachai#iname,com></li></ul>
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<ul><li>Thread context:
<BLOCKQUOTE><UL>
<LI><STRONG>[MUD-Dev] Re: regulating player-created objects</STRONG>, <EM>(continued)</EM>
<ul compact>
<LI><strong><A NAME="00408" HREF="msg00408.html">[MUD-Dev] Re: regulating player-created objects</A></strong>,
Nathan F Yospe <a href="mailto:yospe#hawaii,edu">yospe#hawaii,edu</a>, Tue 05 May 1998, 18:25 GMT
<UL>
<LI><strong><A NAME="00439" HREF="msg00439.html">[MUD-Dev] Re: regulating player-created objects</A></strong>,
Dan Shiovitz <a href="mailto:dbs#cs,wisc.edu">dbs#cs,wisc.edu</a>, Wed 06 May 1998, 21:37 GMT
<UL>
<LI><strong><A NAME="00456" HREF="msg00456.html">[MUD-Dev] Re: regulating player-created objects</A></strong>,
Shawn Halpenny <a href="mailto:malachai#iname,com">malachai#iname,com</a>, Thu 07 May 1998, 13:59 GMT
</LI>
<LI><strong><A NAME="00512" HREF="msg00512.html">[MUD-Dev] Re: regulating player-created objects</A></strong>,
J C Lawrence <a href="mailto:claw#under,engr.sgi.com">claw#under,engr.sgi.com</a>, Tue 12 May 1998, 01:25 GMT
</LI>
</UL>
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</LI>
<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
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</UL>
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