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
|
use std::sync::Arc;
use std::thread;
use async_mutex::Mutex;
use futures::channel::mpsc;
use futures::executor::block_on;
use futures::prelude::*;
#[test]
fn smoke() {
block_on(async {
let m = Mutex::new(());
drop(m.lock().await);
drop(m.lock().await);
})
}
#[test]
fn try_lock() {
let m = Mutex::new(());
*m.try_lock().unwrap() = ();
}
#[test]
fn into_inner() {
let m = Mutex::new(10i32);
assert_eq!(m.into_inner(), 10);
}
#[test]
fn get_mut() {
let mut m = Mutex::new(10i32);
*m.get_mut() = 20;
assert_eq!(m.into_inner(), 20);
}
#[test]
fn contention() {
block_on(async {
let (tx, mut rx) = mpsc::unbounded();
let tx = Arc::new(tx);
let mutex = Arc::new(Mutex::new(0i32));
let num_tasks = 100;
for _ in 0..num_tasks {
let tx = tx.clone();
let mutex = mutex.clone();
thread::spawn(|| {
block_on(async move {
let mut lock = mutex.lock().await;
*lock += 1;
tx.unbounded_send(()).unwrap();
drop(lock);
})
});
}
for _ in 0..num_tasks {
rx.next().await.unwrap();
}
let lock = mutex.lock().await;
assert_eq!(num_tasks, *lock);
});
}
|
