1 files changed, 50 insertions, 0 deletions
diff --git a/vendor/fd-lock/src/write_guard.rs b/vendor/fd-lock/src/write_guard.rs
new file mode 100644
index 000000000..e218e3842
--- /dev/null
+++ b/vendor/fd-lock/src/write_guard.rs
@@ -0,0 +1,50 @@
+use std::ops;
+
+use crate::sys;
+
+/// RAII structure used to release the exclusive write access of a lock when
+/// dropped.
+///
+/// This structure is created by the [`write`] and [`try_write`] methods
+/// on [`RwLock`].
+///
+/// [`write`]: crate::RwLock::write
+/// [`try_write`]: crate::RwLock::try_write
+/// [`RwLock`]: crate::RwLock
+///
+/// # Panics
+///
+/// Dropping this type may panic if the lock fails to unlock.
+#[must_use = "if unused the RwLock will immediately unlock"]
+#[derive(Debug)]
+pub struct RwLockWriteGuard<'lock, T: sys::AsRaw> {
+    guard: sys::RwLockWriteGuard<'lock, T>,
+}
+
+impl<'lock, T: sys::AsRaw> RwLockWriteGuard<'lock, T> {
+    pub(crate) fn new(guard: sys::RwLockWriteGuard<'lock, T>) -> Self {
+        Self { guard }
+    }
+}
+
+impl<T: sys::AsRaw> ops::Deref for RwLockWriteGuard<'_, T> {
+    type Target = T;
+
+    #[inline]
+    fn deref(&self) -> &Self::Target {
+        self.guard.deref()
+    }
+}
+
+impl<T: sys::AsRaw> ops::DerefMut for RwLockWriteGuard<'_, T> {
+    #[inline]
+    fn deref_mut(&mut self) -> &mut Self::Target {
+        self.guard.deref_mut()
+    }
+}
+
+/// Release the lock.
+impl<T: sys::AsRaw> Drop for RwLockWriteGuard<'_, T> {
+    #[inline]
+    fn drop(&mut self) {}
+}