1 files changed, 29 insertions, 0 deletions
diff --git a/third_party/rust/mio/src/sys/windows/waker.rs b/third_party/rust/mio/src/sys/windows/waker.rs
new file mode 100644
index 0000000000..ab12c3c689
--- /dev/null
+++ b/third_party/rust/mio/src/sys/windows/waker.rs
@@ -0,0 +1,29 @@
+use crate::sys::windows::Event;
+use crate::sys::windows::Selector;
+use crate::Token;
+
+use miow::iocp::CompletionPort;
+use std::io;
+use std::sync::Arc;
+
+#[derive(Debug)]
+pub struct Waker {
+    token: Token,
+    port: Arc<CompletionPort>,
+}
+
+impl Waker {
+    pub fn new(selector: &Selector, token: Token) -> io::Result<Waker> {
+        Ok(Waker {
+            token,
+            port: selector.clone_port(),
+        })
+    }
+
+    pub fn wake(&self) -> io::Result<()> {
+        let mut ev = Event::new(self.token);
+        ev.set_readable();
+
+        self.port.post(ev.to_completion_status())
+    }
+}