1 files changed, 47 insertions, 0 deletions
diff --git a/dom/fs/child/FileSystemAccessHandleControlChild.h b/dom/fs/child/FileSystemAccessHandleControlChild.h
new file mode 100644
index 0000000000..93ddb36e55
--- /dev/null
+++ b/dom/fs/child/FileSystemAccessHandleControlChild.h
@@ -0,0 +1,47 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 DOM_FS_CHILD_FILESYSTEMACCESSHANDLECONTROLCHILD_H_
+#define DOM_FS_CHILD_FILESYSTEMACCESSHANDLECONTROLCHILD_H_
+
+#include "mozilla/dom/PFileSystemAccessHandleControlChild.h"
+#include "nsISupportsImpl.h"
+
+namespace mozilla::dom {
+
+class FileSystemSyncAccessHandle;
+
+class FileSystemAccessHandleControlChild
+    : public PFileSystemAccessHandleControlChild {
+ public:
+  NS_INLINE_DECL_REFCOUNTING_WITH_DESTROY(FileSystemAccessHandleControlChild,
+                                          Destroy(), override)
+
+  void SetAccessHandle(FileSystemSyncAccessHandle* aAccessHandle);
+
+  void Shutdown();
+
+  void ActorDestroy(ActorDestroyReason aWhy) override;
+
+ protected:
+  virtual ~FileSystemAccessHandleControlChild() = default;
+
+  // This is called when the object's refcount drops to zero. We use this custom
+  // callback to close the top level actor if it hasn't been explicitly closed
+  // yet. For example when `FileSystemSyncAccessHandle::Create` fails after
+  // creating and binding the top level actor.
+  virtual void Destroy() {
+    Shutdown();
+    delete this;
+  }
+
+  // The weak reference is cleared in ActorDestroy.
+  FileSystemSyncAccessHandle* MOZ_NON_OWNING_REF mAccessHandle;
+};
+
+}  // namespace mozilla::dom
+
+#endif  // DOM_FS_CHILD_FILESYSTEMACCESSHANDLECONTROLCHILD_H_