1 files changed, 55 insertions, 0 deletions
diff --git a/docshell/base/timeline/ObservedDocShell.h b/docshell/base/timeline/ObservedDocShell.h
new file mode 100644
index 0000000000..9d0c39fcb2
--- /dev/null
+++ b/docshell/base/timeline/ObservedDocShell.h
@@ -0,0 +1,55 @@
+/* -*- 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 mozilla_ObservedDocShell_h_
+#define mozilla_ObservedDocShell_h_
+
+#include "MarkersStorage.h"
+#include "mozilla/RefPtr.h"
+#include "mozilla/Mutex.h"
+#include "mozilla/UniquePtr.h"
+#include "nsTArray.h"
+
+class nsIDocShell;
+
+namespace mozilla {
+class AbstractTimelineMarker;
+
+namespace dom {
+struct ProfileTimelineMarker;
+}
+
+// # ObservedDocShell
+//
+// A wrapper around a docshell for which docshell-specific markers are
+// allowed to exist. See TimelineConsumers for register/unregister logic.
+class ObservedDocShell : public MarkersStorage {
+ private:
+  RefPtr<nsIDocShell> mDocShell;
+
+  // Main thread only.
+  nsTArray<UniquePtr<AbstractTimelineMarker>> mTimelineMarkers;
+  bool mPopping = false;
+
+  // Off the main thread only.
+  Mutex mLock;
+  nsTArray<UniquePtr<AbstractTimelineMarker>> mOffTheMainThreadTimelineMarkers
+      MOZ_GUARDED_BY(mLock);
+
+ public:
+  explicit ObservedDocShell(nsIDocShell* aDocShell);
+  nsIDocShell* operator*() const { return mDocShell.get(); }
+
+  void AddMarker(UniquePtr<AbstractTimelineMarker>&& aMarker) override;
+  void AddOTMTMarker(UniquePtr<AbstractTimelineMarker>&& aMarker) override;
+  void ClearMarkers() override;
+  void PopMarkers(JSContext* aCx,
+                  nsTArray<dom::ProfileTimelineMarker>& aStore) override;
+};
+
+}  // namespace mozilla
+
+#endif /* mozilla_ObservedDocShell_h_ */