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#![deny(missing_docs)]
use std::any::Any;
use std::sync::atomic::{AtomicBool, Ordering};
use std::sync::Arc;
use std::thread;
use std::thread::JoinHandle;
pub fn spawn<T, F>(f: F) -> Thread<T>
where
F: FnOnce(Arc<AtomicBool>) -> T + Send + 'static,
T: Send + 'static,
{
Thread::spawn(f)
}
pub struct Thread<T> {
jh: JoinHandle<T>,
stop: Arc<AtomicBool>,
}
impl<T> Thread<T>
where
T: Send + 'static,
{
pub fn spawn<F>(f: F) -> Thread<T>
where
F: FnOnce(Arc<AtomicBool>) -> T + Send + 'static,
{
let stop = Arc::new(AtomicBool::new(false));
Thread {
stop: stop.clone(),
jh: thread::spawn(move || f(stop)),
}
}
pub fn join(self) -> Result<T, Box<(dyn Any + Send + 'static)>> {
self.jh.join()
}
pub fn stop(&self) {
self.stop.store(true, Ordering::Relaxed);
}
pub fn thread(&self) -> &thread::Thread {
self.jh.thread()
}
}
#[cfg(test)]
mod tests {
use super::*;
use std::time::Duration;
#[test]
fn test_busy_loop() {
let th = Thread::spawn(|stop| {
thread::sleep(Duration::from_millis(300));
while !stop.load(Ordering::Relaxed) {}
42
});
th.stop();
assert_eq!(th.join().unwrap(), 42);
}
}