blob: d327023de978adb8bf33946ed10ffee9df61392d (
plain)
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
|
// Copyright 2013 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.
//! Maintains a shared list of sleeping schedulers. Schedulers
//! use this to wake each other up.
use container::Container;
use vec::OwnedVector;
use option::{Option, Some, None};
use cell::Cell;
use unstable::sync::Exclusive;
use rt::sched::SchedHandle;
use clone::Clone;
pub struct SleeperList {
priv stack: ~Exclusive<~[SchedHandle]>
}
impl SleeperList {
pub fn new() -> SleeperList {
SleeperList {
stack: ~Exclusive::new(~[])
}
}
pub fn push(&mut self, handle: SchedHandle) {
let handle = Cell::new(handle);
unsafe {
self.stack.with(|s| s.push(handle.take()));
}
}
pub fn pop(&mut self) -> Option<SchedHandle> {
unsafe {
do self.stack.with |s| {
if !s.is_empty() {
Some(s.pop())
} else {
None
}
}
}
}
}
impl Clone for SleeperList {
fn clone(&self) -> SleeperList {
SleeperList {
stack: self.stack.clone()
}
}
}
|
