#[cfg_attr(not(feature = "all-implementations"), allow(unused))]
use std::{
io::Result,
pin::Pin,
task::{Context, Poll},
};
pub struct TrackClosed<W> {
inner: W,
closed: bool,
}
impl<W> TrackClosed<W> {
pub fn new(inner: W) -> Self {
Self {
inner,
closed: false,
}
}
pub fn is_closed(&self) -> bool {
self.closed
}
}
#[cfg(feature = "futures-io")]
impl<W: futures::io::AsyncWrite + Unpin> futures::io::AsyncWrite for TrackClosed<W> {
fn poll_write(
mut self: Pin<&mut Self>,
cx: &mut Context<'_>,
buf: &[u8],
) -> Poll<Result<usize>> {
assert!(!self.closed);
Pin::new(&mut self.inner).poll_write(cx, buf)
}
fn poll_flush(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<()>> {
assert!(!self.closed);
Pin::new(&mut self.inner).poll_flush(cx)
}
fn poll_close(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<()>> {
assert!(!self.closed);
match Pin::new(&mut self.inner).poll_close(cx) {
Poll::Ready(Ok(())) => {
self.closed = true;
Poll::Ready(Ok(()))
}
other => other,
}
}
fn poll_write_vectored(
mut self: Pin<&mut Self>,
cx: &mut Context<'_>,
bufs: &[std::io::IoSlice<'_>],
) -> Poll<Result<usize>> {
assert!(!self.closed);
Pin::new(&mut self.inner).poll_write_vectored(cx, bufs)
}
}
#[cfg(feature = "tokio")]
impl<W: tokio::io::AsyncWrite + Unpin> tokio::io::AsyncWrite for TrackClosed<W> {
fn poll_write(
mut self: Pin<&mut Self>,
cx: &mut Context<'_>,
buf: &[u8],
) -> Poll<Result<usize>> {
assert!(!self.closed);
Pin::new(&mut self.inner).poll_write(cx, buf)
}
fn poll_flush(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<()>> {
assert!(!self.closed);
Pin::new(&mut self.inner).poll_flush(cx)
}
fn poll_shutdown(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<()>> {
assert!(!self.closed);
match Pin::new(&mut self.inner).poll_shutdown(cx) {
Poll::Ready(Ok(())) => {
self.closed = true;
Poll::Ready(Ok(()))
}
other => other,
}
}
}
