VsyncWorkerChild.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_VsyncWorkerChild_h

#define mozilla_dom_ipc_VsyncWorkerChild_h

#include "mozilla/dom/VsyncChild.h"

#include "mozilla/RefPtr.h"

#include "nsISupportsImpl.h"

namespace mozilla::dom {

class DedicatedWorkerGlobalScope;

class IPCWorkerRef;

class WorkerPrivate;

// The PVsyncWorkerChild actor receives a vsync event from the main process and

// delivers it to the child process. This is specific for workers which wish to

// subscribe to vsync events to drive requestAnimationFrame callbacks.

class VsyncWorkerChild final : public VsyncChild {

  NS_INLINE_DECL_REFCOUNTING(VsyncWorkerChild, override)

  friend class PVsyncChild;

 public:

  VsyncWorkerChild();

  bool Initialize(WorkerPrivate* aWorkerPrivate);

  void Destroy();

  void TryObserve();

  void TryUnobserve();

 private:

  ~VsyncWorkerChild() override;

  mozilla::ipc::IPCResult RecvNotify(const VsyncEvent& aVsync,

                                     const float& aVsyncRate) override;

  void ActorDestroy(ActorDestroyReason aActorDestroyReason) override;

  RefPtr<IPCWorkerRef> mWorkerRef;

  bool mObserving = false;

};

}  // namespace mozilla::dom

#endif  // mozilla_dom_ipc_VsyncWorkerChild_h