Function wait_for_eventfd

performance-metrics/src/util.rs:351–361

Spin and wait until the given eventfd becomes readable.

(notifier: &EventFd)

/// Spin and wait until the given eventfd becomes readable.
pub fn wait_for_eventfd(notifier: &EventFd) {
    loop {
        match notifier.read() {
            Ok(_) => return,
            Err(e) if e.kind() == ErrorKind::WouldBlock => {
                thread::sleep(Duration::from_micros(50));
            }
            Err(e) => panic!("eventfd read failed: {e}"),
        }
    }
}