mirror of
https://github.com/Diggsey/sqlxmq.git
synced 2024-05-16 16:22:46 +00:00
60 lines
1.4 KiB
Rust
60 lines
1.4 KiB
Rust
use std::any::Any;
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use std::fmt::{self, Debug};
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use std::ops::{Deref, DerefMut};
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use tokio::task::JoinHandle;
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#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
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pub struct Opaque<T: Any>(pub T);
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impl<T: Any> Debug for Opaque<T> {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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<dyn Any>::fmt(&self.0, f)
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}
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}
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impl<T: Any> Deref for Opaque<T> {
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type Target = T;
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fn deref(&self) -> &Self::Target {
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&self.0
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}
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}
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impl<T: Any> DerefMut for Opaque<T> {
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fn deref_mut(&mut self) -> &mut Self::Target {
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&mut self.0
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}
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}
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/// A handle to a background task which will be automatically cancelled if
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/// the handle is dropped. Extract the inner join handle to prevent this
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/// behaviour.
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#[derive(Debug)]
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pub struct OwnedHandle(Option<JoinHandle<()>>);
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impl OwnedHandle {
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/// Construct a new `OwnedHandle` from the provided `JoinHandle`
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pub fn new(inner: JoinHandle<()>) -> Self {
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Self(Some(inner))
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}
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/// Get back the original `JoinHandle`
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pub fn into_inner(mut self) -> JoinHandle<()> {
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self.0.take().expect("Only consumed once")
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}
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/// Stop the task and wait for it to finish.
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pub async fn stop(self) {
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let handle = self.into_inner();
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handle.abort();
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let _ = handle.await;
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}
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}
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impl Drop for OwnedHandle {
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fn drop(&mut self) {
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if let Some(handle) = self.0.take() {
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handle.abort();
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}
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}
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}
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