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use std::{
pin::Pin,
task::{Context, Poll},
};
#[derive(Debug)]
pub enum TrySendError<T> {
Closed(T),
Full(T),
}
#[derive(Clone)]
pub struct Sender<T> {
inner: async_channel::Sender<T>,
}
impl<T> std::fmt::Debug for Sender<T> {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
f.debug_struct("Sender").finish()
}
}
impl<T> Sender<T> {
pub async fn send(&self, item: T) -> Result<(), T>
where
T: Send,
{
self.inner.send(item).await.map_err(|e| e.into_inner())
}
pub fn try_send(&self, item: T) -> Result<(), TrySendError<T>> {
self.inner.try_send(item).map_err(|e| match e {
async_channel::TrySendError::Full(t) => TrySendError::Full(t),
async_channel::TrySendError::Closed(t) => TrySendError::Closed(t),
})
}
}
pin_project_lite::pin_project! {
#[derive(Clone)]
pub struct Receiver<T> {
#[pin]
inner: async_channel::Receiver<T>,
}
}
impl<T> Receiver<T> {
pub async fn recv(&self) -> Option<T>
where
T: Send,
{
self.inner.recv().await.ok()
}
pub fn close(&self) -> bool {
self.inner.close()
}
pub fn try_recv(&self) -> Option<T> {
self.inner.try_recv().ok()
}
}
impl<T> futures_lite::Stream for Receiver<T> {
type Item = T;
fn poll_next(self: Pin<&mut Self>, ctx: &mut Context<'_>) -> Poll<Option<Self::Item>> {
let this = self.project();
this.inner.poll_next(ctx)
}
}
pub fn bounded<T>(cap: usize) -> (Sender<T>, Receiver<T>) {
let (tx, rx) = async_channel::bounded(cap);
(Sender { inner: tx }, Receiver { inner: rx })
}
pub fn unbounded<T>() -> (Sender<T>, Receiver<T>) {
let (tx, rx) = async_channel::unbounded();
(Sender { inner: tx }, Receiver { inner: rx })
}