1 files changed, 97 insertions, 0 deletions
diff --git a/dom/webgpu/ObjectModel.h b/dom/webgpu/ObjectModel.h
new file mode 100644
index 0000000000..f56a6b49bc
--- /dev/null
+++ b/dom/webgpu/ObjectModel.h
@@ -0,0 +1,97 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef GPU_OBJECT_MODEL_H_
+#define GPU_OBJECT_MODEL_H_
+
+#include "nsWrapperCache.h"
+#include "nsString.h"
+
+class nsIGlobalObject;
+
+namespace mozilla {
+namespace webgpu {
+class WebGPUChild;
+
+template <typename T>
+class ChildOf {
+ protected:
+  explicit ChildOf(T* const parent);
+  virtual ~ChildOf();
+
+  RefPtr<T> mParent;
+
+ public:
+  nsIGlobalObject* GetParentObject() const;
+};
+
+class ObjectBase : public nsWrapperCache {
+ private:
+  nsString mLabel;
+
+ protected:
+  virtual ~ObjectBase() = default;
+  // Internal mutability model for WebGPU objects.
+  bool mValid = true;
+
+ public:
+  void GetLabel(nsAString& aValue) const;
+  void SetLabel(const nsAString& aLabel);
+};
+
+}  // namespace webgpu
+}  // namespace mozilla
+
+#define GPU_DECL_JS_WRAP(T)                                             \
+  JSObject* WrapObject(JSContext* cx, JS::Handle<JSObject*> givenProto) \
+      override;
+
+#define GPU_DECL_CYCLE_COLLECTION(T)                     \
+  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_NATIVE_CLASS(T) \
+  NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(T)
+
+#define GPU_IMPL_JS_WRAP(T)                                                  \
+  JSObject* T::WrapObject(JSContext* cx, JS::Handle<JSObject*> givenProto) { \
+    return dom::GPU##T##_Binding::Wrap(cx, this, givenProto);                \
+  }
+
+// Note: we don't use `NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE` directly
+// because there is a custom action we need to always do.
+#define GPU_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(T, ...) \
+  NS_IMPL_CYCLE_COLLECTION_CLASS(T)                    \
+  NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(T)             \
+    tmp->Cleanup();                                    \
+    NS_IMPL_CYCLE_COLLECTION_UNLINK(__VA_ARGS__)       \
+    NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER  \
+  NS_IMPL_CYCLE_COLLECTION_UNLINK_END                  \
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(T)           \
+    NS_IMPL_CYCLE_COLLECTION_TRAVERSE(__VA_ARGS__)     \
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END                \
+  NS_IMPL_CYCLE_COLLECTION_TRACE_WRAPPERCACHE(T)
+
+#define GPU_IMPL_CYCLE_COLLECTION(T, ...)            \
+  NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(T, AddRef)    \
+  NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(T, Release) \
+  GPU_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(T, __VA_ARGS__)
+
+template <typename T>
+void ImplCycleCollectionTraverse(nsCycleCollectionTraversalCallback& callback,
+                                 nsTArray<RefPtr<const T>>& field,
+                                 const char* name, uint32_t flags) {
+  for (auto& element : field) {
+    CycleCollectionNoteChild(callback, const_cast<T*>(element.get()), name,
+                             flags);
+  }
+}
+
+template <typename T>
+void ImplCycleCollectionUnlink(nsTArray<RefPtr<const T>>& field) {
+  for (auto& element : field) {
+    ImplCycleCollectionUnlink(element);
+  }
+  field.Clear();
+}
+
+#endif  // GPU_OBJECT_MODEL_H_