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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
commit | 698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch) | |
tree | 173a775858bd501c378080a10dca74132f05bc50 /vendor/futures-util/src/sink/flush.rs | |
parent | Initial commit. (diff) | |
download | rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip |
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'vendor/futures-util/src/sink/flush.rs')
-rw-r--r-- | vendor/futures-util/src/sink/flush.rs | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/vendor/futures-util/src/sink/flush.rs b/vendor/futures-util/src/sink/flush.rs new file mode 100644 index 000000000..35a8372de --- /dev/null +++ b/vendor/futures-util/src/sink/flush.rs @@ -0,0 +1,36 @@ +use core::marker::PhantomData; +use core::pin::Pin; +use futures_core::future::Future; +use futures_core::task::{Context, Poll}; +use futures_sink::Sink; + +/// Future for the [`flush`](super::SinkExt::flush) method. +#[derive(Debug)] +#[must_use = "futures do nothing unless you `.await` or poll them"] +pub struct Flush<'a, Si: ?Sized, Item> { + sink: &'a mut Si, + _phantom: PhantomData<fn(Item)>, +} + +// Pin is never projected to a field. +impl<Si: Unpin + ?Sized, Item> Unpin for Flush<'_, Si, Item> {} + +/// A future that completes when the sink has finished processing all +/// pending requests. +/// +/// The sink itself is returned after flushing is complete; this adapter is +/// intended to be used when you want to stop sending to the sink until +/// all current requests are processed. +impl<'a, Si: Sink<Item> + Unpin + ?Sized, Item> Flush<'a, Si, Item> { + pub(super) fn new(sink: &'a mut Si) -> Self { + Self { sink, _phantom: PhantomData } + } +} + +impl<Si: Sink<Item> + Unpin + ?Sized, Item> Future for Flush<'_, Si, Item> { + type Output = Result<(), Si::Error>; + + fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> { + Pin::new(&mut self.sink).poll_flush(cx) + } +} |