36 lines
1.0 KiB
Rust
36 lines
1.0 KiB
Rust
// -*- rust -*-
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// Copyright 2012 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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extern mod std;
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fn sub(parent: oldcomm::Chan<int>, id: int) {
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if id == 0 {
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oldcomm::send(parent, 0);
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} else {
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let p = oldcomm::Port();
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let ch = oldcomm::Chan(&p);
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let child = task::spawn(|| sub(ch, id - 1) );
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let y = oldcomm::recv(p);
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oldcomm::send(parent, y + 1);
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}
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}
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fn main() {
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let p = oldcomm::Port();
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let ch = oldcomm::Chan(&p);
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let child = task::spawn(|| sub(ch, 200) );
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let y = oldcomm::recv(p);
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debug!("transmission complete");
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log(debug, y);
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assert (y == 200);
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}
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