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<H1>[MUD-Dev] Re: [CODE] [LANGUAGE/PLATFORM SPECIFIC] My Event Engine</H1>
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<LI><em>To</em>: "<A HREF="mailto:mud-dev#kanga,nu">mud-dev#kanga,nu</A>" <<A HREF="mailto:mud-dev#kanga,nu">mud-dev#kanga,nu</A>></LI>
<LI><em>Subject</em>: [MUD-Dev] Re: [CODE] [LANGUAGE/PLATFORM SPECIFIC] My Event Engine</LI>
<LI><em>From</em>: Oliver Jowett <<A HREF="mailto:oliver#jowett,manawatu.planet.co.nz">oliver#jowett,manawatu.planet.co.nz</A>></LI>
<LI><em>Date</em>: Tue, 21 Jul 1998 09:47:48 +1200 (NZST)</LI>
<LI><em>Reply-To</em>: <A HREF="mailto:mud-dev#kanga,nu">mud-dev#kanga,nu</A></LI>
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<PRE>
On Mon, 20 Jul 1998 s001gmu#nova,wright.edu wrote:
> On Sat, 18 Jul 1998 oliver#jowett,manawatu.planet.co.nz wrote:
>
> > Why not move this to a separate layer? At the lowest level, select() on
> > ALL sockets with a timeout equal to the time to next pending event. When
> > input arrives, read and buffer; when output is possible, write from a
> > buffer; when exceptions occur, set an appropriate flag. Loop back and
> > repeat the select. Then when the event actually goes off, you check and
> > modify the buffers.
>
> This works nicely, as long as you have a tick based event queue. The
> model I use is based on the system clock, and uses a linked list as the
> main structure. With one cpu, it is physically quite impossible to
> schedule two events at exactly the same time (and with multiple it is
> quite unlikely), so I don't need any auxiliary linked lists to handle
> collisions. The problem is that my event driver sleeps until the next
> event is scheduled to go off, OR another event is placed first in the
> list. If the later happens, not only would I have to wake up the event
> driver, but I'd also have to interrupt the select, and then reschedule it
> with a new timeout.
I'm not quite clear about how your timing system works - it sounds like a
"tick-based" system which has a much finer (and externally-run, although
that shouldn't affect much) timing resolution?
If you're working with a single thread - how do events get added without
either I/O occuring or an event happening first? Signals, I guess.
Personally I avoid using signals for anything short of exceptional
external circumstances where possible :)
With multiple threads I'm not quite sure why you'd want to have the event
system timing tied into I/O waits anyway.
-O
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<ul><li>Thread context:
<BLOCKQUOTE><UL>
<LI><STRONG>[MUD-Dev] Re: [CODE] [LANGUAGE/PLATFORM SPECIFIC] My Event Engine</STRONG>, <EM>(continued)</EM>
<ul compact>
<LI><strong><A NAME="00661" HREF="msg00661.html">[MUD-Dev] Re: [CODE] [LANGUAGE/PLATFORM SPECIFIC] My Event Engine</A></strong>,
J C Lawrence <a href="mailto:claw#under,engr.sgi.com">claw#under,engr.sgi.com</a>, Tue 11 Aug 1998, 17:32 GMT
</LI>
<LI><strong><A NAME="00248" HREF="msg00248.html">[MUD-Dev] Re: [CODE] [LANGUAGE/PLATFORM SPECIFIC] My Event Engine</A></strong>,
Todd Lair <a href="mailto:tlair#mailzone,com">tlair#mailzone,com</a>, Sat 18 Jul 1998, 05:18 GMT
<UL>
<LI><strong><A NAME="00249" HREF="msg00249.html">[MUD-Dev] Re: [CODE] [LANGUAGE/PLATFORM SPECIFIC] My Event Engine</A></strong>,
oliver <a href="mailto:oliver#jowett,manawatu.planet.co.nz">oliver#jowett,manawatu.planet.co.nz</a>, Sat 18 Jul 1998, 06:27 GMT
<UL>
<LI><strong><A NAME="00269" HREF="msg00269.html">[MUD-Dev] Re: [CODE] [LANGUAGE/PLATFORM SPECIFIC] My Event Engine</A></strong>,
s001gmu <a href="mailto:s001gmu#nova,wright.edu">s001gmu#nova,wright.edu</a>, Mon 20 Jul 1998, 15:57 GMT
<UL>
<LI><strong><A NAME="00273" HREF="msg00273.html">[MUD-Dev] Re: [CODE] [LANGUAGE/PLATFORM SPECIFIC] My Event Engine</A></strong>,
Oliver Jowett <a href="mailto:oliver#jowett,manawatu.planet.co.nz">oliver#jowett,manawatu.planet.co.nz</a>, Mon 20 Jul 1998, 21:51 GMT
<UL>
<LI><strong><A NAME="00277" HREF="msg00277.html">[MUD-Dev] Re: [CODE] [LANGUAGE/PLATFORM SPECIFIC] My Event Engine</A></strong>,
s001gmu <a href="mailto:s001gmu#nova,wright.edu">s001gmu#nova,wright.edu</a>, Tue 21 Jul 1998, 13:49 GMT
<UL>
<LI><strong><A NAME="00300" HREF="msg00300.html">[MUD-Dev] Re: [CODE] [LANGUAGE/PLATFORM SPECIFIC] My Event Engine</A></strong>,
Joel Kelso <a href="mailto:joel#ee,uwa.edu.au">joel#ee,uwa.edu.au</a>, Wed 22 Jul 1998, 02:21 GMT
<UL>
<LI><strong><A NAME="00305" HREF="msg00305.html">[MUD-Dev] Re: [CODE] [LANGUAGE/PLATFORM SPECIFIC] My Event Engine</A></strong>,
s001gmu <a href="mailto:s001gmu#nova,wright.edu">s001gmu#nova,wright.edu</a>, Wed 22 Jul 1998, 13:30 GMT
</LI>
<LI><strong><A NAME="00311" HREF="msg00311.html">[MUD-Dev] Re: [CODE] [LANGUAGE/PLATFORM SPECIFIC] My Event Engine</A></strong>,
J C Lawrence <a href="mailto:claw#under,engr.sgi.com">claw#under,engr.sgi.com</a>, Wed 22 Jul 1998, 17:54 GMT
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