diff options
Diffstat (limited to 'vendor/futures-util/src/io/read_vectored.rs')
-rw-r--r-- | vendor/futures-util/src/io/read_vectored.rs | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/vendor/futures-util/src/io/read_vectored.rs b/vendor/futures-util/src/io/read_vectored.rs new file mode 100644 index 000000000..4e22df57e --- /dev/null +++ b/vendor/futures-util/src/io/read_vectored.rs @@ -0,0 +1,30 @@ +use crate::io::AsyncRead; +use futures_core::future::Future; +use futures_core::task::{Context, Poll}; +use std::io::{self, IoSliceMut}; +use std::pin::Pin; + +/// Future for the [`read_vectored`](super::AsyncReadExt::read_vectored) method. +#[derive(Debug)] +#[must_use = "futures do nothing unless you `.await` or poll them"] +pub struct ReadVectored<'a, R: ?Sized> { + reader: &'a mut R, + bufs: &'a mut [IoSliceMut<'a>], +} + +impl<R: ?Sized + Unpin> Unpin for ReadVectored<'_, R> {} + +impl<'a, R: AsyncRead + ?Sized + Unpin> ReadVectored<'a, R> { + pub(super) fn new(reader: &'a mut R, bufs: &'a mut [IoSliceMut<'a>]) -> Self { + Self { reader, bufs } + } +} + +impl<R: AsyncRead + ?Sized + Unpin> Future for ReadVectored<'_, R> { + type Output = io::Result<usize>; + + fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> { + let this = &mut *self; + Pin::new(&mut this.reader).poll_read_vectored(cx, this.bufs) + } +} |