diff --git a/crates/renderer/src/util.rs b/crates/renderer/src/util.rs
index 1183bfc..08d9982 100644
--- a/crates/renderer/src/util.rs
+++ b/crates/renderer/src/util.rs
@@ -521,6 +521,29 @@ impl<'a> Iterator for ChunkedBitIter<'a> {
     }
 }
 
+pub struct RawMutexGuard<'a, T> {
+    pub(crate) mutex: &'a parking_lot::RawMutex,
+    pub(crate) value: &'a T,
+    pub(crate) _pd: std::marker::PhantomData<&'a ()>,
+}
+
+impl<'a, T> std::ops::Deref for RawMutexGuard<'a, T> {
+    type Target = T;
+
+    fn deref(&self) -> &Self::Target {
+        self.value
+    }
+}
+
+impl<T> Drop for RawMutexGuard<'_, T> {
+    fn drop(&mut self) {
+        use parking_lot::lock_api::RawMutex;
+        unsafe {
+            self.mutex.unlock();
+        }
+    }
+}
+
 pub struct CStringList {
     pub strings: Box<[*const i8]>,
     bytes: Box<[u8]>,