1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
|
// 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.
struct notify {
ch: oldcomm::Chan<bool>, v: @mut bool,
}
impl notify : Drop {
fn finalize(&self) {
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);
oldcomm::send(self.ch, b);
}
}
fn notify(ch: oldcomm::Chan<bool>, v: @mut bool) -> notify {
notify {
ch: ch,
v: v
}
}
fn joinable(+f: fn~()) -> oldcomm::Port<bool> {
fn wrapper(+c: oldcomm::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 = oldcomm::Port();
let c = oldcomm::Chan(&p);
do task::spawn_unlinked { wrapper(c, f) };
p
}
fn join(port: oldcomm::Port<bool>) -> bool {
oldcomm::recv(port)
}
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);
}
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:
|
