65 lines
1.5 KiB
Rust
65 lines
1.5 KiB
Rust
use crate::{
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drop_notifier::{DropListener, DropNotifier},
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executor::block_on,
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queue::Queue,
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selector::{select, Either},
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Canceled,
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};
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pub(super) fn channel<T>() -> (Sender<T>, Receiver<T>) {
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let queue = crate::queue::bounded(1);
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let (send_notifier, send_listener) = crate::drop_notifier::notifier();
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let (recv_notifier, recv_listener) = crate::drop_notifier::notifier();
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(
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Sender {
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queue: queue.clone(),
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send_notifier,
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recv_listener,
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},
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Receiver {
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queue,
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recv_notifier,
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send_listener,
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},
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)
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}
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pub(super) struct Sender<T> {
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queue: Queue<T>,
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#[allow(unused)]
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send_notifier: DropNotifier,
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recv_listener: DropListener,
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}
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pub(super) struct Receiver<T> {
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queue: Queue<T>,
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#[allow(unused)]
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recv_notifier: DropNotifier,
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send_listener: DropListener,
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}
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impl<T> Sender<T> {
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pub(super) async fn send(self, item: T) -> Result<(), Canceled> {
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match select(self.queue.push(item), self.recv_listener.listen()).await {
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Either::Left(()) => Ok(()),
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Either::Right(()) => Err(Canceled),
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}
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}
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pub(super) fn blocking_send(self, item: T) -> Result<(), Canceled> {
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block_on(self.send(item))
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}
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}
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impl<T> Receiver<T> {
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pub(super) async fn recv(self) -> Result<T, Canceled> {
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match select(self.queue.pop(), self.send_listener.listen()).await {
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Either::Left(item) => Ok(item),
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Either::Right(()) => Err(Canceled),
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}
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}
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}
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