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// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
// xfail-win32
// A port of task-killjoin to use a class with a dtor to manage
// the join.
use core::cell::Cell;
use core::comm::*;
struct notify {
ch: Chan<bool>, v: @mut bool,
}
#[unsafe_destructor]
impl Drop for notify {
fn finalize(&self) {
unsafe {
error!("notify: task=%? v=%x unwinding=%b b=%b",
task::get_task(),
ptr::addr_of(&(*(self.v))) as uint,
task::failing(),
*(self.v));
let b = *(self.v);
self.ch.send(b);
}
}
}
fn notify(ch: Chan<bool>, v: @mut bool) -> notify {
notify {
ch: ch,
v: v
}
}
fn joinable(f: ~fn()) -> Port<bool> {
fn wrapper(c: Chan<bool>, f: &fn()) {
let b = @mut false;
error!("wrapper: task=%? allocated v=%x",
task::get_task(),
ptr::addr_of(&(*b)) as uint);
let _r = notify(c, b);
f();
*b = true;
}
let (p, c) = stream();
let c = Cell(c);
do task::spawn_unlinked {
let ccc = c.take();
wrapper(ccc, f)
}
p
}
fn join(port: Port<bool>) -> bool {
port.recv()
}
fn supervised() {
// Yield to make sure the supervisor joins before we
// fail. This is currently not needed because the supervisor
// runs first, but I can imagine that changing.
error!("supervised task=%?", task::get_task);
task::yield();
fail!();
}
fn supervisor() {
error!("supervisor task=%?", task::get_task());
let t = joinable(supervised);
join(t);
}
pub fn main() {
join(joinable(supervisor));
}
// Local Variables:
// mode: rust;
// fill-column: 78;
// indent-tabs-mode: nil
// c-basic-offset: 4
// buffer-file-coding-system: utf-8-unix
// End:
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