1 files changed, 56 insertions, 0 deletions
diff --git a/layout/ipc/VsyncParent.h b/layout/ipc/VsyncParent.h
new file mode 100644
index 0000000000..33e96c4c60
--- /dev/null
+++ b/layout/ipc/VsyncParent.h
@@ -0,0 +1,56 @@
+/* -*- Mode: C++; tab-width: 2; 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 mozilla_layout_ipc_VsyncParent_h
+#define mozilla_layout_ipc_VsyncParent_h
+
+#include "mozilla/layout/PVsyncParent.h"
+#include "mozilla/VsyncDispatcher.h"
+#include "nsCOMPtr.h"
+#include "mozilla/RefPtr.h"
+
+class nsIThread;
+
+namespace mozilla {
+
+namespace ipc {
+class BackgroundParentImpl;
+} // namespace ipc
+
+namespace layout {
+
+// Use PBackground thread in the main process to send vsync notifications to
+// content process. This actor will be released when its parent protocol calls
+// DeallocPVsyncParent().
+class VsyncParent final : public PVsyncParent,
+                          public VsyncObserver
+{
+  friend class mozilla::ipc::BackgroundParentImpl;
+
+private:
+  static already_AddRefed<VsyncParent> Create();
+
+  VsyncParent();
+  virtual ~VsyncParent();
+
+  virtual bool NotifyVsync(TimeStamp aTimeStamp) override;
+  virtual bool RecvRequestVsyncRate() override;
+
+  virtual bool RecvObserve() override;
+  virtual bool RecvUnobserve() override;
+  virtual void ActorDestroy(ActorDestroyReason aActorDestroyReason) override;
+
+  void DispatchVsyncEvent(TimeStamp aTimeStamp);
+
+  bool mObservingVsync;
+  bool mDestroyed;
+  nsCOMPtr<nsIThread> mBackgroundThread;
+  RefPtr<RefreshTimerVsyncDispatcher> mVsyncDispatcher;
+};
+
+} // namespace layout
+} // namespace mozilla
+
+#endif  //mozilla_layout_ipc_VsyncParent_h