dom/ipc/VsyncWorkerChild.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef mozilla_dom_ipc_VsyncWorkerChild_h
   8 #define mozilla_dom_ipc_VsyncWorkerChild_h
   9
  10 #include "mozilla/dom/VsyncChild.h"
  11 #include "mozilla/RefPtr.h"
  12 #include "nsISupportsImpl.h"
  13
  14 namespace mozilla::dom {
  15 class DedicatedWorkerGlobalScope;
  16 class IPCWorkerRef;
  17 class WorkerPrivate;
  18
  19 // The PVsyncWorkerChild actor receives a vsync event from the main process and
  20 // delivers it to the child process. This is specific for workers which wish to
  21 // subscribe to vsync events to drive requestAnimationFrame callbacks.
  22 class VsyncWorkerChild final : public VsyncChild {
  23   NS_INLINE_DECL_REFCOUNTING(VsyncWorkerChild, override)
  24
  25   friend class PVsyncChild;
  26
  27  public:
  28   VsyncWorkerChild();
  29
  30   bool Initialize(WorkerPrivate* aWorkerPrivate);
  31
  32   void Destroy();
  33
  34   void TryObserve();
  35
  36   void TryUnobserve();
  37
  38  private:
  39   ~VsyncWorkerChild() override;
  40
  41   mozilla::ipc::IPCResult RecvNotify(const VsyncEvent& aVsync,
  42                                      const float& aVsyncRate) override;
  43
  44   void ActorDestroy(ActorDestroyReason aActorDestroyReason) override;
  45
  46   RefPtr<IPCWorkerRef> mWorkerRef;
  47   bool mObserving = false;
  48 };
  49
  50 }  // namespace mozilla::dom
  51
  52 #endif  // mozilla_dom_ipc_VsyncWorkerChild_h