feat: can run qjs

__enclave/virt_enclave/external/quickjs-rs/src/droppable_value.rs

@@ -0,0 +1,47 @@
+/// A small wrapper that frees resources that have to be freed
+/// automatically when they go out of scope.
+pub struct DroppableValue<T, F>
+where
+    F: FnMut(&mut T),
+{
+    value: T,
+    drop_fn: F,
+}
+
+impl<T, F> DroppableValue<T, F>
+where
+    F: FnMut(&mut T),
+{
+    pub fn new(value: T, drop_fn: F) -> Self {
+        Self { value, drop_fn }
+    }
+}
+
+impl<T, F> Drop for DroppableValue<T, F>
+where
+    F: FnMut(&mut T),
+{
+    fn drop(&mut self) {
+        (self.drop_fn)(&mut self.value);
+    }
+}
+
+impl<T, F> std::ops::Deref for DroppableValue<T, F>
+where
+    F: FnMut(&mut T),
+{
+    type Target = T;
+
+    fn deref(&self) -> &T {
+        &self.value
+    }
+}
+
+impl<T, F> std::ops::DerefMut for DroppableValue<T, F>
+where
+    F: FnMut(&mut T),
+{
+    fn deref_mut(&mut self) -> &mut T {
+        &mut self.value
+    }
+}