core/muxing: Rename close to poll_close (#2666)

It is common practise to prefix functions that return a `Poll` with
`poll_`.

core/CHANGELOG.md

@@ -1,9 +1,11 @@
 # 0.33.0 [unreleased]
 
 - Have methods on `Transport` take `&mut self` instead of `self`. See [PR 2529].
+- Rename `StreamMuxer::close` to `StreamMuxer::poll_close`. See [PR 2666].
 - Remove deprecated function `StreamMuxer::is_remote_acknowledged`. See [PR 2665].
 
 [PR 2529]: https://github.com/libp2p/rust-libp2p/pull/2529
+[PR 2666]: https://github.com/libp2p/rust-libp2p/pull/2666
 [PR 2665]: https://github.com/libp2p/rust-libp2p/pull/2665
 
 # 0.32.1

core/src/either.rs

@@ -346,10 +346,10 @@ where
         }
     }
 
-    fn close(&self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
+    fn poll_close(&self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
         match self {
-            EitherOutput::First(inner) => inner.close(cx).map_err(|e| e.into()),
-            EitherOutput::Second(inner) => inner.close(cx).map_err(|e| e.into()),
+            EitherOutput::First(inner) => inner.poll_close(cx).map_err(|e| e.into()),
+            EitherOutput::Second(inner) => inner.poll_close(cx).map_err(|e| e.into()),
         }
     }
 

core/src/muxing.rs

@@ -215,7 +215,7 @@ pub trait StreamMuxer {
     /// >           that the remote is properly informed of the shutdown. However, apart from
     /// >           properly informing the remote, there is no difference between this and
     /// >           immediately dropping the muxer.
-    fn close(&self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>>;
+    fn poll_close(&self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>>;
 
     /// Flush this `StreamMuxer`.
     ///
@@ -606,8 +606,8 @@ impl StreamMuxer for StreamMuxerBox {
     }
 
     #[inline]
-    fn close(&self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
-        self.inner.close(cx)
+    fn poll_close(&self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
+        self.inner.poll_close(cx)
     }
 
     #[inline]
@@ -747,8 +747,8 @@ where
     }
 
     #[inline]
-    fn close(&self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
-        self.inner.close(cx).map_err(|e| e.into())
+    fn poll_close(&self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
+        self.inner.poll_close(cx).map_err(|e| e.into())
     }
 
     #[inline]

core/src/muxing/singleton.rs

@@ -149,7 +149,7 @@ where
 
     fn destroy_substream(&self, _: Self::Substream) {}
 
-    fn close(&self, cx: &mut Context<'_>) -> Poll<Result<(), io::Error>> {
+    fn poll_close(&self, cx: &mut Context<'_>) -> Poll<Result<(), io::Error>> {
         // The `StreamMuxer` trait requires that `close()` implies `flush_all()`.
         self.flush_all(cx)
     }

core/tests/util.rs

@@ -32,7 +32,7 @@ where
         loop {
             match std::mem::replace(&mut self.state, CloseMuxerState::Done) {
                 CloseMuxerState::Close(muxer) => {
-                    if !muxer.close(cx)?.is_ready() {
+                    if !muxer.poll_close(cx)?.is_ready() {
                         self.state = CloseMuxerState::Close(muxer);
                         return Poll::Pending;
                     }

muxers/mplex/src/lib.rs

@@ -169,7 +169,7 @@ where
         self.io.lock().drop_stream(sub.id);
     }
 
-    fn close(&self, cx: &mut Context<'_>) -> Poll<Result<(), io::Error>> {
+    fn poll_close(&self, cx: &mut Context<'_>) -> Poll<Result<(), io::Error>> {
         self.io.lock().poll_close(cx)
     }
 

muxers/yamux/src/lib.rs

@@ -177,7 +177,7 @@ where
 
     fn destroy_substream(&self, _: Self::Substream) {}
 
-    fn close(&self, c: &mut Context<'_>) -> Poll<YamuxResult<()>> {
+    fn poll_close(&self, c: &mut Context<'_>) -> Poll<YamuxResult<()>> {
         let mut inner = self.0.lock();
         if let std::task::Poll::Ready(x) = Pin::new(&mut inner.control).poll_close(c) {
             return Poll::Ready(x.map_err(YamuxError));

swarm/src/connection/pool.rs

@@ -686,7 +686,7 @@ where
                     if let Err(error) = error {
                         self.spawn(
                             poll_fn(move |cx| {
-                                if let Err(e) = ready!(muxer.close(cx)) {
+                                if let Err(e) = ready!(muxer.poll_close(cx)) {
                                     log::debug!(
                                         "Failed to close connection {:?} to peer {}: {:?}",
                                         id,

swarm/src/connection/substream.rs

@@ -211,7 +211,7 @@ where
     type Output = Result<(), IoError>;
 
     fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
-        match self.muxer.close(cx) {
+        match self.muxer.poll_close(cx) {
             Poll::Pending => Poll::Pending,
             Poll::Ready(Ok(())) => Poll::Ready(Ok(())),
             Poll::Ready(Err(err)) => Poll::Ready(Err(err.into())),