1 files changed, 52 insertions, 0 deletions
diff --git a/third_party/rust/miow/src/lib.rs b/third_party/rust/miow/src/lib.rs
new file mode 100644
index 0000000000..53c01aeeae
--- /dev/null
+++ b/third_party/rust/miow/src/lib.rs
@@ -0,0 +1,52 @@
+//! A zero overhead Windows I/O library
+
+#![cfg(windows)]
+#![deny(missing_docs)]
+#![allow(bad_style)]
+#![doc(html_root_url = "https://docs.rs/miow/0.3/x86_64-pc-windows-msvc/")]
+
+use std::cmp;
+use std::io;
+use std::time::Duration;
+
+use winapi::shared::minwindef::*;
+use winapi::um::winbase::*;
+
+#[cfg(test)]
+macro_rules! t {
+    ($e:expr) => {
+        match $e {
+            Ok(e) => e,
+            Err(e) => panic!("{} failed with {:?}", stringify!($e), e),
+        }
+    };
+}
+
+mod handle;
+mod overlapped;
+
+pub mod iocp;
+pub mod net;
+pub mod pipe;
+
+pub use crate::overlapped::Overlapped;
+
+fn cvt(i: BOOL) -> io::Result<BOOL> {
+    if i == 0 {
+        Err(io::Error::last_os_error())
+    } else {
+        Ok(i)
+    }
+}
+
+fn dur2ms(dur: Option<Duration>) -> u32 {
+    let dur = match dur {
+        Some(dur) => dur,
+        None => return INFINITE,
+    };
+    let ms = dur.as_secs().checked_mul(1_000);
+    let ms_extra = dur.subsec_nanos() / 1_000_000;
+    ms.and_then(|ms| ms.checked_add(ms_extra as u64))
+        .map(|ms| cmp::min(u32::max_value() as u64, ms) as u32)
+        .unwrap_or(INFINITE - 1)
+}