1 // Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 // Test for concurrent tasks
13 // ignore-test OOM on linux-32 without opts
20 fn calc(children: uint, parent_wait_chan: &Sender<Sender<Sender<int>>>) {
22 let wait_ports: Vec<Reciever<Sender<Sender<int>>>> = vec::from_fn(children, |_| {
23 let (wait_port, wait_chan) = stream::<Sender<Sender<int>>>();
25 calc(children / 2, &wait_chan);
30 let child_start_chans: Vec<Sender<Sender<int>>> =
31 wait_ports.move_iter().map(|port| port.recv()).collect();
33 let (start_port, start_chan) = stream::<Sender<int>>();
34 parent_wait_chan.send(start_chan);
35 let parent_result_chan: Sender<int> = start_port.recv();
37 let child_sum_ports: Vec<Reciever<int>> =
38 child_start_chans.move_iter().map(|child_start_chan| {
39 let (child_sum_port, child_sum_chan) = stream::<int>();
40 child_start_chan.send(child_sum_chan);
44 let sum = child_sum_ports.move_iter().fold(0, |sum, sum_port| sum + sum_port.recv() );
46 parent_result_chan.send(sum + 1);
50 let args = os::args();
51 let args = if os::getenv("RUST_BENCH").is_some() {
52 vec!("".to_owned(), "30".to_owned())
53 } else if args.len() <= 1u {
54 vec!("".to_owned(), "10".to_owned())
59 let children = from_str::<uint>(args[1]).unwrap();
60 let (wait_port, wait_chan) = stream();
62 calc(children, &wait_chan);
65 let start_chan = wait_port.recv();
66 let (sum_port, sum_chan) = stream::<int>();
67 start_chan.send(sum_chan);
68 let sum = sum_port.recv();
69 println!("How many tasks? {} tasks.", sum);