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
use std::fmt::{self, Debug};
use std::thread::{self, ThreadId};
pub struct ThreadBound<T> {
value: T,
thread_id: ThreadId,
}
unsafe impl<T> Sync for ThreadBound<T> {}
unsafe impl<T: Copy> Send for ThreadBound<T> {}
impl<T> ThreadBound<T> {
pub fn new(value: T) -> Self {
ThreadBound {
value,
thread_id: thread::current().id(),
}
}
pub fn get(&self) -> Option<&T> {
if thread::current().id() == self.thread_id {
Some(&self.value)
} else {
None
}
}
}
impl<T: Debug> Debug for ThreadBound<T> {
fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
match self.get() {
Some(value) => Debug::fmt(value, formatter),
None => formatter.write_str("unknown"),
}
}
}