VsyncParent.h - mozsearch

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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