85 lines
2.1 KiB
Rust
85 lines
2.1 KiB
Rust
// 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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// xfail-win32
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// A port of task-killjoin to use a class with a dtor to manage
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// the join.
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struct notify {
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ch: oldcomm::Chan<bool>, v: @mut bool,
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}
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impl notify : Drop {
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fn finalize(&self) {
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error!("notify: task=%? v=%x unwinding=%b b=%b",
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task::get_task(),
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ptr::addr_of(&(*(self.v))) as uint,
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task::failing(),
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*(self.v));
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let b = *(self.v);
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oldcomm::send(self.ch, b);
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}
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}
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fn notify(ch: oldcomm::Chan<bool>, v: @mut bool) -> notify {
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notify {
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ch: ch,
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v: v
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}
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}
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fn joinable(+f: fn~()) -> oldcomm::Port<bool> {
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fn wrapper(+c: oldcomm::Chan<bool>, +f: fn()) {
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let b = @mut false;
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error!("wrapper: task=%? allocated v=%x",
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task::get_task(),
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ptr::addr_of(&(*b)) as uint);
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let _r = notify(c, b);
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f();
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*b = true;
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}
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let p = oldcomm::Port();
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let c = oldcomm::Chan(&p);
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do task::spawn_unlinked { wrapper(c, f) };
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p
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}
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fn join(port: oldcomm::Port<bool>) -> bool {
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oldcomm::recv(port)
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}
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fn supervised() {
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// Yield to make sure the supervisor joins before we
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// fail. This is currently not needed because the supervisor
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// runs first, but I can imagine that changing.
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error!("supervised task=%?", task::get_task);
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task::yield();
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fail;
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}
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fn supervisor() {
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error!("supervisor task=%?", task::get_task());
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let t = joinable(supervised);
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join(t);
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}
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fn main() {
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join(joinable(supervisor));
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}
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// Local Variables:
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// mode: rust;
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// fill-column: 78;
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// indent-tabs-mode: nil
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// c-basic-offset: 4
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// buffer-file-coding-system: utf-8-unix
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// End:
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