snafu/
once_bool.rs

1use std::sync::{
2    atomic::{AtomicBool, Ordering},
3    Once,
4};
5
6pub struct OnceBool {
7    start: Once,
8    enabled: AtomicBool,
9}
10
11impl OnceBool {
12    pub const fn new() -> Self {
13        Self {
14            start: Once::new(),
15            enabled: AtomicBool::new(false),
16        }
17    }
18
19    pub fn get<F: FnOnce() -> bool>(&self, f: F) -> bool {
20        self.start.call_once(|| {
21            let enabled = f();
22            self.enabled.store(enabled, Ordering::SeqCst);
23        });
24
25        self.enabled.load(Ordering::SeqCst)
26    }
27}
snafu/once_bool.rs

snafu/
once_bool.rs
