1 files changed, 46 insertions, 0 deletions
diff --git a/vendor/tokio/src/io/util/write.rs b/vendor/tokio/src/io/util/write.rs
new file mode 100644
index 000000000..92169ebc1
--- /dev/null
+++ b/vendor/tokio/src/io/util/write.rs
@@ -0,0 +1,46 @@
+use crate::io::AsyncWrite;
+
+use pin_project_lite::pin_project;
+use std::future::Future;
+use std::io;
+use std::marker::PhantomPinned;
+use std::pin::Pin;
+use std::task::{Context, Poll};
+
+pin_project! {
+    /// A future to write some of the buffer to an `AsyncWrite`.
+    #[derive(Debug)]
+    #[must_use = "futures do nothing unless you `.await` or poll them"]
+    pub struct Write<'a, W: ?Sized> {
+        writer: &'a mut W,
+        buf: &'a [u8],
+        // Make this future `!Unpin` for compatibility with async trait methods.
+        #[pin]
+        _pin: PhantomPinned,
+    }
+}
+
+/// Tries to write some bytes from the given `buf` to the writer in an
+/// asynchronous manner, returning a future.
+pub(crate) fn write<'a, W>(writer: &'a mut W, buf: &'a [u8]) -> Write<'a, W>
+where
+    W: AsyncWrite + Unpin + ?Sized,
+{
+    Write {
+        writer,
+        buf,
+        _pin: PhantomPinned,
+    }
+}
+
+impl<W> Future for Write<'_, W>
+where
+    W: AsyncWrite + Unpin + ?Sized,
+{
+    type Output = io::Result<usize>;
+
+    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<io::Result<usize>> {
+        let me = self.project();
+        Pin::new(&mut *me.writer).poll_write(cx, me.buf)
+    }
+}