80 lines
2.7 KiB
Rust
80 lines
2.7 KiB
Rust
// The Computer Language Benchmarks Game
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// http://benchmarksgame.alioth.debian.org/
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//
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// contributed by the Rust Project Developers
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// Copyright (c) 2012-2014 The Rust Project Developers
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//
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions
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// are met:
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//
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// - Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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//
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// - Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in
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// the documentation and/or other materials provided with the
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// distribution.
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//
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// - Neither the name of "The Computer Language Benchmarks Game" nor
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// the name of "The Computer Language Shootout Benchmarks" nor the
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// names of its contributors may be used to endorse or promote
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// products derived from this software without specific prior
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// written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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// OF THE POSSIBILITY OF SUCH DAMAGE.
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#![feature(phase)]
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#[phase(plugin)] extern crate green;
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green_start!(main)
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fn start(n_tasks: int, token: int) {
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let (tx, mut rx) = channel();
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tx.send(token);
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for i in range(2, n_tasks + 1) {
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let (tx, next_rx) = channel();
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spawn(proc() roundtrip(i, tx, rx));
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rx = next_rx;
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}
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spawn(proc() roundtrip(1, tx, rx));
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}
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fn roundtrip(id: int, tx: Sender<int>, rx: Receiver<int>) {
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for token in rx.iter() {
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if token == 1 {
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println!("{}", id);
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break;
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}
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tx.send(token - 1);
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}
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}
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fn main() {
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let args = std::os::args();
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let args = args.as_slice();
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let token = if std::os::getenv("RUST_BENCH").is_some() {
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2000000
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} else {
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args.get(1).and_then(|arg| from_str(arg.as_slice())).unwrap_or(1000)
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};
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let n_tasks = args.get(2)
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.and_then(|arg| from_str(arg.as_slice()))
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.unwrap_or(503);
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start(n_tasks, token);
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}
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