70 lines
2.1 KiB
Rust
70 lines
2.1 KiB
Rust
use std::sync::atomic::{AtomicUsize, Ordering};
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use std::time::Duration;
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use timing;
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pub struct Counter {
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pub name: &'static str,
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pub counts: AtomicUsize,
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pub nanos: AtomicUsize,
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pub times: AtomicUsize,
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pub lograte: usize,
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}
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macro_rules! create_counter {
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($name:expr, $lograte:expr) => {
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Counter {
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name: $name,
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counts: AtomicUsize::new(0),
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nanos: AtomicUsize::new(0),
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times: AtomicUsize::new(0),
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lograte: $lograte,
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}
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};
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}
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macro_rules! inc_counter {
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($name:expr, $count:expr, $start:expr) => {
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unsafe { $name.inc($count, $start.elapsed()) };
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};
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}
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impl Counter {
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pub fn inc(&mut self, events: usize, dur: Duration) {
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let total = dur.as_secs() * 1_000_000_000 + dur.subsec_nanos() as u64;
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let counts = self.counts.fetch_add(events, Ordering::Relaxed);
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let nanos = self.nanos.fetch_add(total as usize, Ordering::Relaxed);
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let times = self.times.fetch_add(1, Ordering::Relaxed);
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if times % self.lograte == 0 && times > 0 {
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info!(
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"COUNTER:{{\"name\": \"{}\", \"counts\": {}, \"nanos\": {}, \"samples\": {}, \"rate\": {}, \"now\": {}}}",
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self.name,
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counts,
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nanos,
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times,
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counts as f64 * 1e9 / nanos as f64,
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timing::timestamp(),
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);
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}
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}
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}
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#[cfg(test)]
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mod tests {
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use counter::Counter;
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use std::sync::atomic::{AtomicUsize, Ordering};
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use std::time::Instant;
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#[test]
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fn test_counter() {
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static mut COUNTER: Counter = create_counter!("test", 100);
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let start = Instant::now();
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let count = 1;
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inc_counter!(COUNTER, count, start);
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unsafe {
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assert_eq!(COUNTER.counts.load(Ordering::Relaxed), 1);
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assert_ne!(COUNTER.nanos.load(Ordering::Relaxed), 0);
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assert_eq!(COUNTER.times.load(Ordering::Relaxed), 1);
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assert_eq!(COUNTER.lograte, 100);
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assert_eq!(COUNTER.name, "test");
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}
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}
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}
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