chore: checkpoint before Python removal

vendor/windows-core/src/scoped_interface.rs

@@ -0,0 +1,41 @@
+use super::*;
+use core::ffi::c_void;
+use core::marker::PhantomData;
+
+#[doc(hidden)]
+#[repr(C)]
+pub struct ScopedHeap {
+    pub vtable: *const c_void,
+    pub this: *const c_void,
+}
+
+#[doc(hidden)]
+pub struct ScopedInterface<'a, T: Interface> {
+    interface: T,
+    lifetime: PhantomData<&'a T>,
+}
+
+impl<T: Interface> ScopedInterface<'_, T> {
+    pub fn new(interface: T) -> Self {
+        Self {
+            interface,
+            lifetime: PhantomData,
+        }
+    }
+}
+
+impl<T: Interface> core::ops::Deref for ScopedInterface<'_, T> {
+    type Target = T;
+
+    fn deref(&self) -> &T {
+        &self.interface
+    }
+}
+
+impl<T: Interface> Drop for ScopedInterface<'_, T> {
+    fn drop(&mut self) {
+        unsafe {
+            let _ = Box::from_raw(self.interface.as_raw() as *const _ as *mut ScopedHeap);
+        }
+    }
+}