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5ed1fa84a5
Condvar: implement wait_timeout for targets without threads
This always falls back to sleeping since there is no way to notify a condvar on a target without threads.
Even on a target that has no threads the following code is a legitimate use case:
```rust
use std::sync::{Condvar, Mutex};
use std::time::Duration;
fn main() {
let cv = Condvar::new();
let mutex = Mutex::new(());
let mut guard = mutex.lock().unwrap();
cv.notify_one();
let res;
(guard, res) = cv.wait_timeout(guard, Duration::from_secs(3)).unwrap();
assert!(res.timed_out());
}
```
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| build.rs | ||
| Cargo.toml | ||