1 files changed, 80 insertions, 0 deletions
diff --git a/third_party/rust/mio/src/sys/mod.rs b/third_party/rust/mio/src/sys/mod.rs
new file mode 100644
index 0000000000..81ae6d2e61
--- /dev/null
+++ b/third_party/rust/mio/src/sys/mod.rs
@@ -0,0 +1,80 @@
+//! Module with system specific types.
+//!
+//! Required types:
+//!
+//! * `Event`: a type alias for the system specific event, e.g. `kevent` or
+//!            `epoll_event`.
+//! * `event`: a module with various helper functions for `Event`, see
+//!            [`crate::event::Event`] for the required functions.
+//! * `Events`: collection of `Event`s, see [`crate::Events`].
+//! * `IoSourceState`: state for the `IoSource` type.
+//! * `Selector`: selector used to register event sources and poll for events,
+//!               see [`crate::Poll`] and [`crate::Registry`] for required
+//!               methods.
+//! * `tcp` and `udp` modules: see the [`crate::net`] module.
+//! * `Waker`: see [`crate::Waker`].
+
+cfg_os_poll! {
+    macro_rules! debug_detail {
+        (
+            $type: ident ($event_type: ty), $test: path,
+            $($(#[$target: meta])* $libc: ident :: $flag: ident),+ $(,)*
+        ) => {
+            struct $type($event_type);
+
+            impl fmt::Debug for $type {
+                fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+                    let mut written_one = false;
+                    $(
+                        $(#[$target])*
+                        #[allow(clippy::bad_bit_mask)] // Apparently some flags are zero.
+                        {
+                            // Windows doesn't use `libc` but the `afd` module.
+                            if $test(&self.0, &$libc :: $flag) {
+                                if !written_one {
+                                    write!(f, "{}", stringify!($flag))?;
+                                    written_one = true;
+                                } else {
+                                    write!(f, "|{}", stringify!($flag))?;
+                                }
+                            }
+                        }
+                    )+
+                    if !written_one {
+                        write!(f, "(empty)")
+                    } else {
+                        Ok(())
+                    }
+                }
+            }
+        };
+    }
+}
+
+#[cfg(unix)]
+cfg_os_poll! {
+    mod unix;
+    pub use self::unix::*;
+}
+
+#[cfg(windows)]
+cfg_os_poll! {
+    mod windows;
+    pub use self::windows::*;
+}
+
+cfg_not_os_poll! {
+    mod shell;
+    pub(crate) use self::shell::*;
+
+    #[cfg(unix)]
+    cfg_any_os_ext! {
+        mod unix;
+        pub use self::unix::SourceFd;
+    }
+
+    #[cfg(unix)]
+    cfg_net! {
+        pub use self::unix::SocketAddr;
+    }
+}