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Fix the Future impl for JoinHandle on wasm #870

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Fix the Future impl for JoinHandle on wasm #870

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9 changes: 9 additions & 0 deletions src/task/join_handle.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -78,7 +78,16 @@ impl<T> Drop for JoinHandle<T> {
impl<T> Future for JoinHandle<T> {
type Output = T;

#[cfg(not(target_os = "unknown"))]
fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
Pin::new(&mut self.handle.as_mut().unwrap()).poll(cx)
}

#[cfg(target_arch = "wasm32")]
fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
match Pin::new(&mut self.handle.as_mut().unwrap()).poll(cx) {
Poll::Ready(Ok(value)) => Poll::Ready(value),
_ => Poll::Pending,
}
}
}