On Sun, 2007-08-19 at 13:13 +0300, Rhythmic Fistman wrote:
[]
[CCing to Andreas in case he can throw more light on this]
A general note on fthreads and schannels. As Andreas
Rossberg noted on LtU (Lambda the Ultimate), Felix fthread/schannel
is a "very poor man's promise/future".
As I understand it, a nicer construction is something like this:
var x = f(); // future
...
println x;
What this does is schedule the calculation of x, but the calculation
is not forced until x is used. At the println, if x isn't calculated
yet, we suspend until it is.
The point is that the operation is transparent. This is closely
related to lazy evaluation.
In Felix, you have to:
(a) create (two) fthread(s)
(b) create a channel
(c) explicitly read/write the channel
In addition, this only works with (top level) procedures.
--
John Skaller <skaller at users dot sf dot net>
Felix, successor to C++: http://felix.sf.net
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