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
pub(crate) use self::imp::AtomicU64;
#[cfg(not(any(target_arch = "arm", target_arch = "mips", target_arch = "powerpc")))]
mod imp {
pub(crate) use std::sync::atomic::AtomicU64;
}
#[cfg(any(target_arch = "arm", target_arch = "mips", target_arch = "powerpc"))]
mod imp {
use std::sync::atomic::Ordering;
use std::sync::Mutex;
#[derive(Debug)]
pub(crate) struct AtomicU64 {
inner: Mutex<u64>,
}
impl AtomicU64 {
pub(crate) fn new(val: u64) -> AtomicU64 {
AtomicU64 {
inner: Mutex::new(val),
}
}
pub(crate) fn load(&self, _: Ordering) -> u64 {
*self.inner.lock().unwrap()
}
pub(crate) fn store(&self, val: u64, _: Ordering) {
*self.inner.lock().unwrap() = val;
}
pub(crate) fn fetch_or(&self, val: u64, _: Ordering) -> u64 {
let mut lock = self.inner.lock().unwrap();
let prev = *lock;
*lock = prev | val;
prev
}
pub(crate) fn compare_and_swap(&self, old: u64, new: u64, _: Ordering) -> u64 {
let mut lock = self.inner.lock().unwrap();
let prev = *lock;
if prev != old {
return prev;
}
*lock = new;
prev
}
}
}