88 lines
2.1 KiB
Rust
88 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-test linked failure
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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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use std::cell::Cell;
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use std::comm::*;
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use std::ptr;
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use std::task;
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struct notify {
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ch: Chan<bool>, v: @mut bool,
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}
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#[unsafe_destructor]
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impl Drop for notify {
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fn drop(&mut self) {
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unsafe {
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error!("notify: task=%? v=%x unwinding=%b b=%b",
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0,
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ptr::to_unsafe_ptr(&(*(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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self.ch.send(b);
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}
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}
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}
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fn notify(ch: 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()) -> Port<bool> {
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fn wrapper(c: 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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0,
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ptr::to_unsafe_ptr(&(*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, c) = stream();
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let c = Cell::new(c);
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do task::spawn_unlinked {
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let ccc = c.take();
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wrapper(ccc, f)
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}
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p
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}
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fn join(port: Port<bool>) -> bool {
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port.recv()
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}
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fn supervised() {
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// Deschedule 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=%?", 0);
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task::deschedule();
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fail!();
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}
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fn supervisor() {
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error!("supervisor task=%?", 0);
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let t = joinable(supervised);
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join(t);
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}
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pub fn main() {
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join(joinable(supervisor));
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}
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