85 lines
2.4 KiB
Rust
85 lines
2.4 KiB
Rust
#![allow(clippy::integer_arithmetic)]
|
|
pub mod counter;
|
|
pub mod datapoint;
|
|
pub mod metrics;
|
|
pub mod poh_timing_point;
|
|
pub use crate::metrics::{flush, query, set_host_id, set_panic_hook, submit};
|
|
use std::sync::{
|
|
atomic::{AtomicU64, Ordering},
|
|
Arc,
|
|
};
|
|
|
|
// To track an external counter which cannot be reset and is always increasing
|
|
#[derive(Default)]
|
|
pub struct MovingStat {
|
|
value: AtomicU64,
|
|
}
|
|
|
|
impl MovingStat {
|
|
pub fn update_stat(&self, old_value: &MovingStat, new_value: u64) {
|
|
let old = old_value.value.swap(new_value, Ordering::Acquire);
|
|
self.value
|
|
.fetch_add(new_value.saturating_sub(old), Ordering::Release);
|
|
}
|
|
|
|
pub fn load_and_reset(&self) -> u64 {
|
|
self.value.swap(0, Ordering::Acquire)
|
|
}
|
|
}
|
|
|
|
/// A helper that sends the count of created tokens as a datapoint.
|
|
#[allow(clippy::redundant_allocation)]
|
|
pub struct TokenCounter(Arc<&'static str>);
|
|
|
|
impl TokenCounter {
|
|
/// Creates a new counter with the specified metrics `name`.
|
|
pub fn new(name: &'static str) -> Self {
|
|
Self(Arc::new(name))
|
|
}
|
|
|
|
/// Creates a new token for this counter. The metric's value will be equal
|
|
/// to the number of `CounterToken`s.
|
|
pub fn create_token(&self) -> CounterToken {
|
|
// new_count = strong_count
|
|
// - 1 (in TokenCounter)
|
|
// + 1 (token that's being created)
|
|
datapoint_info!(*self.0, ("count", Arc::strong_count(&self.0), i64));
|
|
CounterToken(self.0.clone())
|
|
}
|
|
}
|
|
|
|
/// A token for `TokenCounter`.
|
|
#[allow(clippy::redundant_allocation)]
|
|
pub struct CounterToken(Arc<&'static str>);
|
|
|
|
impl Clone for CounterToken {
|
|
fn clone(&self) -> Self {
|
|
// new_count = strong_count
|
|
// - 1 (in TokenCounter)
|
|
// + 1 (token that's being created)
|
|
datapoint_info!(*self.0, ("count", Arc::strong_count(&self.0), i64));
|
|
CounterToken(self.0.clone())
|
|
}
|
|
}
|
|
|
|
impl Drop for CounterToken {
|
|
fn drop(&mut self) {
|
|
// new_count = strong_count
|
|
// - 1 (in TokenCounter, if it still exists)
|
|
// - 1 (token that's being dropped)
|
|
datapoint_info!(
|
|
*self.0,
|
|
("count", Arc::strong_count(&self.0).saturating_sub(2), i64)
|
|
);
|
|
}
|
|
}
|
|
|
|
impl Drop for TokenCounter {
|
|
fn drop(&mut self) {
|
|
datapoint_info!(
|
|
*self.0,
|
|
("count", Arc::strong_count(&self.0).saturating_sub(2), i64)
|
|
);
|
|
}
|
|
}
|