71 lines
2.2 KiB
Rust
71 lines
2.2 KiB
Rust
// Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// Test for concurrent tasks
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// ignore-test OOM on linux-32 without opts
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use std::os;
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use std::task;
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use std::uint;
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use std::slice;
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fn calc(children: uint, parent_wait_chan: &Sender<Sender<Sender<int>>>) {
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let wait_ports: Vec<Reciever<Sender<Sender<int>>>> = vec::from_fn(children, |_| {
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let (wait_port, wait_chan) = stream::<Sender<Sender<int>>>();
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task::spawn(proc() {
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calc(children / 2, &wait_chan);
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});
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wait_port
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});
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let child_start_chans: Vec<Sender<Sender<int>>> =
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wait_ports.move_iter().map(|port| port.recv()).collect();
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let (start_port, start_chan) = stream::<Sender<int>>();
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parent_wait_chan.send(start_chan);
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let parent_result_chan: Sender<int> = start_port.recv();
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let child_sum_ports: Vec<Reciever<int>> =
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child_start_chans.move_iter().map(|child_start_chan| {
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let (child_sum_port, child_sum_chan) = stream::<int>();
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child_start_chan.send(child_sum_chan);
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child_sum_port
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}).collect();
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let sum = child_sum_ports.move_iter().fold(0, |sum, sum_port| sum + sum_port.recv() );
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parent_result_chan.send(sum + 1);
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}
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fn main() {
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let args = os::args();
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let args = if os::getenv("RUST_BENCH").is_some() {
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vec!(~"", ~"30")
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} else if args.len() <= 1u {
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vec!(~"", ~"10")
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} else {
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args
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};
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let children = from_str::<uint>(args[1]).unwrap();
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let (wait_port, wait_chan) = stream();
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task::spawn(proc() {
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calc(children, &wait_chan);
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});
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let start_chan = wait_port.recv();
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let (sum_port, sum_chan) = stream::<int>();
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start_chan.send(sum_chan);
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let sum = sum_port.recv();
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println!("How many tasks? {} tasks.", sum);
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}
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