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Signed-off-by: Simon Paitrault <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,89 @@ | ||
| pub mod mpsc { | ||
| use futures::{FutureExt, TryFutureExt}; | ||
| use prometheus::IntGauge; | ||
| use tokio::sync::mpsc::error::TrySendError; | ||
| pub mod error { | ||
| pub use tokio::sync::mpsc::error::*; | ||
| } | ||
| #[derive(Debug)] | ||
| pub struct Sender<T> { | ||
| inner: tokio::sync::mpsc::Sender<T>, | ||
| gauge: IntGauge, | ||
| } | ||
|
|
||
| impl<T> Clone for Sender<T> { | ||
| fn clone(&self) -> Self { | ||
| Self { | ||
| inner: self.inner.clone(), | ||
| gauge: self.gauge.clone(), | ||
| } | ||
| } | ||
| } | ||
|
|
||
| impl<T> Sender<T> { | ||
| pub async fn send(&self, value: T) -> Result<(), tokio::sync::mpsc::error::SendError<T>> { | ||
| self.inner | ||
| .send(value) | ||
| .inspect_ok(|_| self.gauge.inc()) | ||
| .await | ||
| } | ||
|
|
||
| pub fn try_send(&self, message: T) -> Result<(), TrySendError<T>> { | ||
| self.inner | ||
| .try_send(message) | ||
| // remove this unsightly hack once https://github.com/rust-lang/rust/issues/91345 is resolved | ||
| .map(|val| { | ||
| self.gauge.inc(); | ||
| val | ||
| }) | ||
| } | ||
| } | ||
|
|
||
| pub struct Receiver<T> { | ||
| inner: tokio::sync::mpsc::Receiver<T>, | ||
| gauge: IntGauge, | ||
| } | ||
|
|
||
| impl<T> Receiver<T> { | ||
| pub fn inner(self) -> tokio::sync::mpsc::Receiver<T> { | ||
| self.inner | ||
| } | ||
|
|
||
| pub async fn recv(&mut self) -> Option<T> { | ||
| self.inner | ||
| .recv() | ||
| .inspect(|opt| { | ||
| if opt.is_some() { | ||
| self.gauge.dec(); | ||
| } | ||
| }) | ||
| .await | ||
| } | ||
|
|
||
| pub fn try_recv(&mut self) -> Result<T, tokio::sync::mpsc::error::TryRecvError> { | ||
| self.inner.try_recv().map(|val| { | ||
| self.gauge.dec(); | ||
| val | ||
| }) | ||
| } | ||
| } | ||
|
|
||
| pub fn channel<T>(size: usize, gauge: &IntGauge) -> (Sender<T>, Receiver<T>) { | ||
| // Reset the gauge | ||
| gauge.set(0); | ||
|
|
||
| let (sender, receiver) = tokio::sync::mpsc::channel(size); | ||
|
|
||
| ( | ||
| Sender { | ||
| inner: sender, | ||
| gauge: gauge.clone(), | ||
| }, | ||
| Receiver { | ||
| inner: receiver, | ||
| gauge: gauge.clone(), | ||
| }, | ||
| ) | ||
| } | ||
| } | ||
|
|
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