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
|
// Copyright 2014 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.
use mpsc = std::sync::mpsc_queue;
use std::sync::arc::UnsafeArc;
pub enum PopResult<T> {
Inconsistent,
Empty,
Data(T),
}
pub fn queue<T: Send>() -> (Consumer<T>, Producer<T>) {
let (a, b) = UnsafeArc::new2(mpsc::Queue::new());
(Consumer { inner: a }, Producer { inner: b })
}
pub struct Producer<T> {
priv inner: UnsafeArc<mpsc::Queue<T>>,
}
pub struct Consumer<T> {
priv inner: UnsafeArc<mpsc::Queue<T>>,
}
impl<T: Send> Consumer<T> {
pub fn pop(&mut self) -> PopResult<T> {
match unsafe { (*self.inner.get()).pop() } {
mpsc::Inconsistent => Inconsistent,
mpsc::Empty => Empty,
mpsc::Data(t) => Data(t),
}
}
pub fn casual_pop(&mut self) -> Option<T> {
match unsafe { (*self.inner.get()).pop() } {
mpsc::Inconsistent => None,
mpsc::Empty => None,
mpsc::Data(t) => Some(t),
}
}
}
impl<T: Send> Producer<T> {
pub fn push(&mut self, t: T) {
unsafe { (*self.inner.get()).push(t); }
}
}
impl<T: Send> Clone for Producer<T> {
fn clone(&self) -> Producer<T> {
Producer { inner: self.inner.clone() }
}
}
|
