57 lines
1.4 KiB
Rust
57 lines
1.4 KiB
Rust
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//! Prints the elapsed time every 1 second and quits on Ctrl+C.
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#[cfg(windows)] // signal_hook::iterator does not work on windows
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fn main() {
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println!("This example does not work on Windows");
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}
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#[cfg(not(windows))]
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fn main() {
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use std::io;
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use std::thread;
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use std::time::{Duration, Instant};
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use crossbeam_channel::{bounded, select, tick, Receiver};
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use signal_hook::consts::SIGINT;
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use signal_hook::iterator::Signals;
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// Creates a channel that gets a message every time `SIGINT` is signalled.
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fn sigint_notifier() -> io::Result<Receiver<()>> {
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let (s, r) = bounded(100);
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let mut signals = Signals::new(&[SIGINT])?;
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thread::spawn(move || {
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for _ in signals.forever() {
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if s.send(()).is_err() {
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break;
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}
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}
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});
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Ok(r)
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}
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// Prints the elapsed time.
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fn show(dur: Duration) {
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println!("Elapsed: {}.{:03} sec", dur.as_secs(), dur.subsec_millis());
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}
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let start = Instant::now();
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let update = tick(Duration::from_secs(1));
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let ctrl_c = sigint_notifier().unwrap();
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loop {
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select! {
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recv(update) -> _ => {
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show(start.elapsed());
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}
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recv(ctrl_c) -> _ => {
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println!();
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println!("Goodbye!");
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show(start.elapsed());
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break;
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}
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}
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}
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}
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