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<H1>[MUD-Dev] Re: DevMUD: Inheritable modules</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: DevMUD: Inheritable modules</LI>
<LI><em>From</em>: Jo Dillon <<A HREF="mailto:emily#thelonious,new.ox.ac.uk">emily#thelonious,new.ox.ac.uk</A>></LI>
<LI><em>Date</em>: Mon, 2 Nov 1998 10:09:57 +0000</LI>
<LI><em>Reply-To</em>: <A HREF="mailto:mud-dev#kanga,nu">mud-dev#kanga,nu</A></LI>
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<PRE>
Jon Leonard (jleonard#divcom,slimy.com) spake thusly:
> My current thoughts on this:
>
> I don't want to use C++, because it doesn't have the object model I want.
I'd say C makes sense for the basic engine; I personally would probably
end up writing my plugins in C++, but the plugin interface should probably
be C; C has something approaching an ABI whereas C++ emphatically does
not, and it would be nice if plugins compiled with different compilers
on the same platform would work.
> An interface should have a name, and an array of function structures
> like those exported by modules, except without the function pointers.
>
> We should have a source verifier that checks that the claimed interface
> (name-mangled version of the function, or whatever) matches the prototype
> of the function pointer.
>
> There should be a separate collection of defined interfaces, so a module
> can just say "I implement interface X" (this can be verified, of course)
I personally like this idea, where an interface consists of an array
of function pointers. It tends to make for efficient function calls :)
It also works well for communication between languages and for RPC.
I did some tests at some point (I don't have the statistics) which showed
that using this approach was as fast as using virtual functions
and /much/ faster than Java method calls, but about half the speed of
a non-virtual function call.
> This database of interfaces shouldn't be monolithic -- I don't want to have
> to know about all interfaces that someone else might define.
Of course, you would want to know what interfaces were defined by
remote objects in a distributed mud. Perhaps it would be good to look
at COM or possibly CORBA here?
--
Jo
Harmony - the project to create an LGPL Qt clone
<A HREF="http://harmony.ruhr.de">http://harmony.ruhr.de</A>
</PRE>
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<LI><STRONG><A NAME="00573" HREF="msg00573.html">[MUD-Dev] Re: DevMUD: Inheritable modules</A></STRONG>
<UL><LI><EM>From:</EM> Jon Leonard <jleonard#divcom,slimy.com></LI></UL></LI>
<LI><STRONG><A NAME="00579" HREF="msg00579.html">[MUD-Dev] Re: DevMUD: Inheritable modules</A></STRONG>
<UL><LI><EM>From:</EM> The Arrow <arrow#trelleborg,mail.telia.com></LI></UL></LI>
<LI><STRONG><A NAME="00583" HREF="msg00583.html">[MUD-Dev] Re: DevMUD: Inheritable modules</A></STRONG>
<UL><LI><EM>From:</EM> Jon Leonard <jleonard#divcom,slimy.com></LI></UL></LI>
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<ul><li>Thread context:
<BLOCKQUOTE><UL>
<LI><STRONG>[MUD-Dev] Re: DevMUD: Inheritable modules</STRONG>, <EM>(continued)</EM>
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<LI><strong><A NAME="00851" HREF="msg00851.html">[MUD-Dev] Re: DevMUD: Inheritable modules</A></strong>,
James Wilson <a href="mailto:jwilson#rochester,rr.com">jwilson#rochester,rr.com</a>, Sun 22 Nov 1998, 23:04 GMT
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</ul>
</ul>
<LI><strong><A NAME="00617" HREF="msg00617.html">[MUD-Dev] Re: DevMUD: Inheritable modules</A></strong>,
Jon A. Lambert <a href="mailto:jlsysinc#ix,netcom.com">jlsysinc#ix,netcom.com</a>, Sat 31 Oct 1998, 06:30 GMT
</LI>
<LI><strong><A NAME="00684" HREF="msg00684.html">[MUD-Dev] Re: DevMUD: Inheritable modules</A></strong>,
Jo Dillon <a href="mailto:emily#thelonious,new.ox.ac.uk">emily#thelonious,new.ox.ac.uk</a>, Mon 02 Nov 1998, 10:41 GMT
<UL>
<LI><strong><A NAME="00692" HREF="msg00692.html">[MUD-Dev] Re: DevMUD: Inheritable modules</A></strong>,
Vadim Tkachenko <a href="mailto:vt#freehold,crocodile.org">vt#freehold,crocodile.org</a>, Tue 03 Nov 1998, 00:24 GMT
</LI>
</UL>
</LI>
</ul>
</ul>
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<LI><strong><A NAME="00681" HREF="msg00681.html">[MUD-Dev] Re: DevMUD: Inheritable modules</A></strong>,
Jo Dillon <a href="mailto:emily#thelonious,new.ox.ac.uk">emily#thelonious,new.ox.ac.uk</a>, Mon 02 Nov 1998, 10:14 GMT
</LI>
</ul>
</ul>
</ul>
<LI><strong><A NAME="00608" HREF="msg00608.html">[MUD-Dev] Re: DevMUD: Inheritable modules</A></strong>,
The Arrow <a href="mailto:arrow#trelleborg,mail.telia.com">arrow#trelleborg,mail.telia.com</a>, Sat 31 Oct 1998, 00:17 GMT
<UL>
<LI><strong><A NAME="00615" HREF="msg00615.html">[MUD-Dev] Re: DevMUD: Inheritable modules</A></strong>,
Thandor <a href="mailto:thandor#donut,dhis.org">thandor#donut,dhis.org</a>, Sat 31 Oct 1998, 04:29 GMT
<UL>
<LI><strong><A NAME="00637" HREF="msg00637.html">[MUD-Dev] Re: DevMUD: Inheritable modules</A></strong>,
The Arrow <a href="mailto:arrow#trelleborg,mail.telia.com">arrow#trelleborg,mail.telia.com</a>, Sat 31 Oct 1998, 21:07 GMT
<UL>
<LI><strong><A NAME="00654" HREF="msg00654.html">[MUD-Dev] Re: DevMUD: Inheritable modules</A></strong>,
Thandor <a href="mailto:thandor#donut,dhis.org">thandor#donut,dhis.org</a>, Sun 01 Nov 1998, 02:53 GMT
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