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<H1>[MUD-Dev] Re: lurker emerges</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: lurker emerges</LI>
<LI><em>From</em>: Vadim Tkachenko <<A HREF="mailto:vt#freehold,crocodile.org">vt#freehold,crocodile.org</A>></LI>
<LI><em>Date</em>: Tue, 11 Aug 1998 23:33:37 -0500</LI>
<LI><em>Reply-To</em>: <A HREF="mailto:mud-dev#kanga,nu">mud-dev#kanga,nu</A></LI>
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<PRE>
T. Alexander Popiel wrote:
[skipped]
> Unfortunately, I require (by my own free will, I'll admit) functionality
> in non-threaded environments, so the portability doesn't hold for me.
> However, we're just getting religious here, so I'll drop it. ;-)
My fault - I'm getting picky with the *terms* to achieve the
understanding, and usually forget to mention that upfront.
> >nor Java semaphores (they don't exist there)
>
> *blink blink*
>
> I suppose not, in the strictest sense, but I use the following
> construct all the time:
>
> Object sem = new Object();
> synchronized (sem) {
> /* pass sem to some other thread */
> sem.wait();
> }
>
> ...
>
> /* some other thread */
> synchronized (sem) { sem.notify(); }
>
> Tastes like a semaphore to me. ;-)
Looks like duck... :-)) In fact, yes, this is a mutex semaphore. As for
event semaphores, it's slightly different, and I had my own ideas about
the semantics, so I've implemented the sems in a pretty weird way.
One of the goals I wanted to achieve is to create a multiple-wait
semaphore, or semaphore group. It is possible to do this stuff in Java
without any additions, too, but it's the pain in the neck. And, as a
side effect, the observable/observer pattern applies here well, too. And
the callbacks.
And as it turned out, it was useful to implement even the mutex
semaphores (though they _do_ exist as the synchronized access) just to
make the design concept clearer. And to use them in the multiple-wait
conditions.
> - Alex
--
Still alive and smile stays on,
Vadim Tkachenko <vt#freehold,crocodile.org>
--
UNIX _is_ user friendly, he's just very picky about who his friends are
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<LI><STRONG><A NAME="00658" HREF="msg00658.html">[MUD-Dev] Re: lurker emerges</A></STRONG>
<UL><LI><EM>From:</EM> "T. Alexander Popiel" <popiel#snugharbor,com></LI></UL></LI>
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<ul><li>Thread context:
<BLOCKQUOTE><UL>
<LI><STRONG>[MUD-Dev] Re: lurker emerges</STRONG>, <EM>(continued)</EM>
<ul compact>
<ul compact>
<ul compact>
<ul compact>
<ul compact>
<ul compact>
<ul compact>
<LI><strong><A NAME="00649" HREF="msg00649.html">[MUD-Dev] Re: lurker emerges</A></strong>,
Vadim Tkachenko <a href="mailto:vt#freehold,crocodile.org">vt#freehold,crocodile.org</a>, Tue 11 Aug 1998, 03:41 GMT
<UL>
<LI><strong><A NAME="00652" HREF="msg00652.html">[MUD-Dev] Re: lurker emerges</A></strong>,
T. Alexander Popiel <a href="mailto:popiel#snugharbor,com">popiel#snugharbor,com</a>, Tue 11 Aug 1998, 04:45 GMT
<UL>
<LI><strong><A NAME="00653" HREF="msg00653.html">[MUD-Dev] Re: lurker emerges</A></strong>,
Vadim Tkachenko <a href="mailto:vt#freehold,crocodile.org">vt#freehold,crocodile.org</a>, Tue 11 Aug 1998, 05:39 GMT
<LI><strong><A NAME="00658" HREF="msg00658.html">[MUD-Dev] Re: lurker emerges</A></strong>,
T. Alexander Popiel <a href="mailto:popiel#snugharbor,com">popiel#snugharbor,com</a>, Tue 11 Aug 1998, 15:05 GMT
<LI><strong><A NAME="00676" HREF="msg00676.html">[MUD-Dev] Re: lurker emerges</A></strong>,
Vadim Tkachenko <a href="mailto:vt#freehold,crocodile.org">vt#freehold,crocodile.org</a>, Wed 12 Aug 1998, 04:33 GMT
</LI>
</LI>
</LI>
<LI><strong><A NAME="00656" HREF="msg00656.html">[MUD-Dev] Re: lurker emerges</A></strong>,
Petri Virkkula <a href="mailto:pvirkkul#iki,fi">pvirkkul#iki,fi</a>, Tue 11 Aug 1998, 07:53 GMT
</LI>
</UL>
</LI>
<LI><strong><A NAME="00654" HREF="msg00654.html">[MUD-Dev] Re: lurker emerges</A></strong>,
Vadim Tkachenko <a href="mailto:vt#freehold,crocodile.org">vt#freehold,crocodile.org</a>, Tue 11 Aug 1998, 06:48 GMT
</LI>
</UL>
</LI>
</ul>
</ul>
</ul>
</ul>
<LI><strong><A NAME="00615" HREF="msg00615.html">[MUD-Dev] Re: lurker emerges</A></strong>,
Petri Virkkula <a href="mailto:pvirkkul#iki,fi">pvirkkul#iki,fi</a>, Mon 10 Aug 1998, 05:57 GMT
</LI>
</ul>
</ul>
<LI><strong><A NAME="00600" HREF="msg00600.html">[MUD-Dev] Re: lurker emerges</A></strong>,
James Wilson <a href="mailto:jwilson#rochester,rr.com">jwilson#rochester,rr.com</a>, Sun 09 Aug 1998, 23:54 GMT
</LI>
</ul>
</LI>
</UL></BLOCKQUOTE>
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