1 files changed, 51 insertions, 0 deletions
diff --git a/dom/webgpu/DeviceLostInfo.h b/dom/webgpu/DeviceLostInfo.h
new file mode 100644
index 0000000000..1ab77610c7
--- /dev/null
+++ b/dom/webgpu/DeviceLostInfo.h
@@ -0,0 +1,51 @@
+/* -*- 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_DeviceLostInfo_H_
+#define GPU_DeviceLostInfo_H_
+
+#include "mozilla/dom/WebGPUBinding.h"
+#include "mozilla/Maybe.h"
+#include "nsWrapperCache.h"
+#include "ObjectModel.h"
+
+namespace mozilla::webgpu {
+class Device;
+
+class DeviceLostInfo final : public nsWrapperCache {
+ public:
+  GPU_DECL_CYCLE_COLLECTION(DeviceLostInfo)
+  GPU_DECL_JS_WRAP(DeviceLostInfo)
+
+  explicit DeviceLostInfo(nsIGlobalObject* const aGlobal,
+                          const nsAString& aMessage)
+      : mGlobal(aGlobal), mMessage(aMessage) {}
+  DeviceLostInfo(nsIGlobalObject* const aGlobal,
+                 dom::GPUDeviceLostReason aReason, const nsAString& aMessage)
+      : mGlobal(aGlobal), mReason(Some(aReason)), mMessage(aMessage) {}
+
+ private:
+  ~DeviceLostInfo() = default;
+  void Cleanup() {}
+
+  nsCOMPtr<nsIGlobalObject> mGlobal;
+  const Maybe<dom::GPUDeviceLostReason> mReason;
+  const nsAutoString mMessage;
+
+ public:
+  void GetReason(JSContext* aCx, JS::MutableHandle<JS::Value> aRetval) {
+    if (!mReason || !dom::ToJSValue(aCx, mReason.value(), aRetval)) {
+      aRetval.setUndefined();
+    }
+  }
+
+  void GetMessage(nsAString& aValue) const { aValue = mMessage; }
+
+  nsIGlobalObject* GetParentObject() const { return mGlobal; }
+};
+
+}  // namespace mozilla::webgpu
+
+#endif  // GPU_DeviceLostInfo_H_