Re: [9fans] Channel casting

["Russ Cox" <rsc@plan9.bell-labs.com>]

> 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