From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <c81a07aeb07147671b8c4a892db3a2d2@plan9.bell-labs.com>
To: 9fans@cse.psu.edu
Subject: Re: [9fans] Channel casting
From: "Russ Cox" <rsc@plan9.bell-labs.com>
In-Reply-To: <3EC968C4.9000006@ameritech.net>
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Date: Mon, 19 May 2003 18:38:02 -0400
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> Correct?

Yes.  In Limbo, here's an echo server:

	srvchan := chan of (int, chan of int);
	for(;;){
		(n, c) := <-srvchan;
		c <-= n;
	}

And some clients:

	echothread(srvchan: chan of (int, chan of int))
	{
		c := chan of int;
		for(i:=0;; i++){
			srvchan <-= (i, c);
			j := <-c;
			sys->print("sent %d, got %d\n", i, j);
		}
	}

	spawn echothread(srvchan);
	spawn echothread(srvchan);
	spawn echothread(srvchan);
	spawn echothread(srvchan);

or something like that.  You can do the same with libthread,
but everything is uglier in libthread.

Russ