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use std;
import vec;
import task;
import comm;
import comm::chan;
import comm::port;
import comm::recv;
import comm::send;
enum msg { closed, received([u8]), }
fn producer(c: chan<[u8]>) {
send(c, [1u8, 2u8, 3u8, 4u8]);
let empty: [u8] = [];
send(c, empty);
}
fn packager(cb: chan<chan<[u8]>>, msg: chan<msg>) {
let p: port<[u8]> = port();
send(cb, chan(p));
loop {
#debug("waiting for bytes");
let data = recv(p);
#debug("got bytes");
if vec::len(data) == 0u {
#debug("got empty bytes, quitting");
break;
}
#debug("sending non-empty buffer of length");
log(debug, vec::len(data));
send(msg, received(data));
#debug("sent non-empty buffer");
}
#debug("sending closed message");
send(msg, closed);
#debug("sent closed message");
}
fn main() {
let p: port<msg> = port();
let ch = chan(p);
let recv_reader: port<chan<[u8]>> = port();
let recv_reader_chan = chan(recv_reader);
let pack = task::spawn {|| packager(recv_reader_chan, ch); };
let source_chan: chan<[u8]> = recv(recv_reader);
let prod = task::spawn {|| producer(source_chan); };
loop {
let msg = recv(p);
alt msg {
closed { #debug("Got close message"); break; }
received(data) {
#debug("Got data. Length is:");
log(debug, vec::len::<u8>(data));
}
}
}
}
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