Update this crate to use the new polling breaking changes (#142)

Signed-off-by: John Nunley <dev@notgull.net>

Author: notgull

Cargo.toml

@@ -29,16 +29,13 @@ concurrent-queue = "2.2.0"
 futures-io = { version = "0.3.28", default-features = false, features = ["std"] }
 futures-lite = { version = "1.11.0", default-features = false }
 parking = "2.0.0"
-polling = "2.6.0"
+polling = "3.0.0"
 rustix = { version = "0.38.2", default-features = false, features = ["std", "fs"] }
 slab = "0.4.2"
 socket2 = { version = "0.5.3", features = ["all"] }
 tracing = { version = "0.1.37", default-features = false }
 waker-fn = "1.1.0"
 
-[build-dependencies]
-autocfg = "1"
-
 [dev-dependencies]
 async-channel = "1"
 async-net = "1"
@@ -54,3 +51,6 @@ timerfd = "1"
 
 [target.'cfg(windows)'.dev-dependencies]
 uds_windows = "1"
+
+[patch.crates-io]
+async-io = { path = "." }

build.rs

@@ -37,17 +37,21 @@ fn main() -> std::io::Result<()> {
     future::block_on(async {
         // Watch events in the current directory.
         let mut inotify = Async::new(Inotify::init()?)?;
-        inotify
-            .get_mut()
-            .watches()
-            .add(".", WatchMask::ALL_EVENTS)?;
+
+        // SAFETY: We do not move the inner file descriptor out.
+        unsafe {
+            inotify
+                .get_mut()
+                .watches()
+                .add(".", WatchMask::ALL_EVENTS)?;
+        }
         println!("Watching for filesystem events in the current directory...");
         println!("Try opening a file to trigger some events.");
         println!();
 
         // Wait for events in a loop and print them on the screen.
         loop {
-            for event in inotify.read_with_mut(read_op).await? {
+            for event in unsafe { inotify.read_with_mut(read_op).await? } {
                 println!("{:?}", event);
             }
         }

examples/linux-inotify.rs

@@ -8,22 +8,88 @@
 
 #[cfg(windows)]
 fn main() -> std::io::Result<()> {
+    use std::ops::Deref;
+    use std::os::windows::io::{AsRawSocket, AsSocket, BorrowedSocket};
     use std::path::PathBuf;
 
     use async_io::Async;
     use blocking::Unblock;
-    use futures_lite::{future, io, prelude::*};
+    use futures_lite::{future, prelude::*};
+    use std::io;
     use tempfile::tempdir;
-    use uds_windows::{UnixListener, UnixStream};
+
+    // n.b.: notgull: uds_windows does not support I/O safety uet, hence the wrapper types
+
+    struct UnixListener(uds_windows::UnixListener);
+
+    impl From<uds_windows::UnixListener> for UnixListener {
+        fn from(ul: uds_windows::UnixListener) -> Self {
+            Self(ul)
+        }
+    }
+
+    impl Deref for UnixListener {
+        type Target = uds_windows::UnixListener;
+
+        fn deref(&self) -> &uds_windows::UnixListener {
+            &self.0
+        }
+    }
+
+    impl AsSocket for UnixListener {
+        fn as_socket(&self) -> BorrowedSocket<'_> {
+            unsafe { BorrowedSocket::borrow_raw(self.as_raw_socket()) }
+        }
+    }
+
+    struct UnixStream(uds_windows::UnixStream);
+
+    impl From<uds_windows::UnixStream> for UnixStream {
+        fn from(ul: uds_windows::UnixStream) -> Self {
+            Self(ul)
+        }
+    }
+
+    impl Deref for UnixStream {
+        type Target = uds_windows::UnixStream;
+
+        fn deref(&self) -> &uds_windows::UnixStream {
+            &self.0
+        }
+    }
+
+    impl AsSocket for UnixStream {
+        fn as_socket(&self) -> BorrowedSocket<'_> {
+            unsafe { BorrowedSocket::borrow_raw(self.as_raw_socket()) }
+        }
+    }
+
+    impl io::Read for UnixStream {
+        fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
+            io::Read::read(&mut self.0, buf)
+        }
+    }
+
+    impl io::Write for UnixStream {
+        fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+            io::Write::write(&mut self.0, buf)
+        }
+
+        fn flush(&mut self) -> io::Result<()> {
+            io::Write::flush(&mut self.0)
+        }
+    }
+
+    unsafe impl async_io::IoSafe for UnixStream {}
 
     async fn client(addr: PathBuf) -> io::Result<()> {
         // Connect to the address.
-        let stream = Async::new(UnixStream::connect(addr)?)?;
+        let stream = Async::new(UnixStream::from(uds_windows::UnixStream::connect(addr)?))?;
         println!("Connected to {:?}", stream.get_ref().peer_addr()?);
 
         // Pipe the stream to stdout.
         let mut stdout = Unblock::new(std::io::stdout());
-        io::copy(&stream, &mut stdout).await?;
+        futures_lite::io::copy(stream, &mut stdout).await?;
         Ok(())
     }
 
@@ -32,7 +98,7 @@ fn main() -> std::io::Result<()> {
 
     future::block_on(async {
         // Create a listener.
-        let listener = Async::new(UnixListener::bind(&path)?)?;
+        let listener = Async::new(UnixListener::from(uds_windows::UnixListener::bind(&path)?))?;
         println!("Listening on {:?}", listener.get_ref().local_addr()?);
 
         future::try_zip(
@@ -42,7 +108,9 @@ fn main() -> std::io::Result<()> {
                 println!("Accepted a client");
 
                 // Send a message, drop the stream, and wait for the client.
-                Async::new(stream)?.write_all(b"Hello!\n").await?;
+                Async::new(UnixStream::from(stream))?
+                    .write_all(b"Hello!\n")
+                    .await?;
                 Ok(())
             },
             client(path),