1 files changed, 31 insertions, 0 deletions
diff --git a/vendor/fd-lock/src/sys/windows/read_guard.rs b/vendor/fd-lock/src/sys/windows/read_guard.rs
new file mode 100644
index 000000000..28f09bb95
--- /dev/null
+++ b/vendor/fd-lock/src/sys/windows/read_guard.rs
@@ -0,0 +1,31 @@
+use windows_sys::Win32::Foundation::HANDLE;
+use windows_sys::Win32::Storage::FileSystem::UnlockFile;
+
+use std::ops;
+use std::os::windows::prelude::*;
+
+use super::utils::syscall;
+use super::RwLock;
+
+#[derive(Debug)]
+pub struct RwLockReadGuard<'lock, T: AsRawHandle> {
+    pub(crate) lock: &'lock RwLock<T>,
+}
+
+impl<T: AsRawHandle> ops::Deref for RwLockReadGuard<'_, T> {
+    type Target = T;
+
+    #[inline]
+    fn deref(&self) -> &Self::Target {
+        &self.lock.inner
+    }
+}
+
+impl<T: AsRawHandle> Drop for RwLockReadGuard<'_, T> {
+    #[inline]
+    fn drop(&mut self) {
+        let handle = self.lock.inner.as_raw_handle() as HANDLE;
+        syscall(unsafe { UnlockFile(handle, 0, 0, 1, 0) })
+            .expect("Could not unlock the file descriptor");
+    }
+}