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-rw-r--r--dom/ipc/VsyncParent.h54
1 files changed, 54 insertions, 0 deletions
diff --git a/dom/ipc/VsyncParent.h b/dom/ipc/VsyncParent.h
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+/* -*- 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_dom_ipc_VsyncParent_h
+#define mozilla_dom_ipc_VsyncParent_h
+
+#include "mozilla/dom/PVsyncParent.h"
+#include "mozilla/VsyncDispatcher.h"
+#include "nsCOMPtr.h"
+#include "mozilla/RefPtr.h"
+
+class nsIThread;
+
+namespace mozilla::dom {
+
+// 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 PVsyncParent;
+
+ NS_INLINE_DECL_THREADSAFE_REFCOUNTING(VsyncParent, override)
+
+ public:
+ VsyncParent();
+ void UpdateVsyncDispatcher(const RefPtr<VsyncDispatcher>& aVsyncDispatcher);
+
+ private:
+ virtual ~VsyncParent() = default;
+
+ void NotifyVsync(const VsyncEvent& aVsync) override;
+ virtual void ActorDestroy(ActorDestroyReason aActorDestroyReason) override;
+
+ mozilla::ipc::IPCResult RecvObserve();
+ mozilla::ipc::IPCResult RecvUnobserve();
+
+ void DispatchVsyncEvent(const VsyncEvent& aVsync);
+ void UpdateVsyncRate();
+
+ bool IsOnInitialThread();
+ void AssertIsOnInitialThread();
+
+ bool mObservingVsync;
+ bool mDestroyed;
+ nsCOMPtr<nsIThread> mInitialThread;
+ RefPtr<VsyncDispatcher> mVsyncDispatcher;
+};
+
+} // namespace mozilla::dom
+
+#endif // mozilla_dom_ipc_VsyncParent_h