dom/ipc/VsyncMainChild.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_VsyncMainChild_h
   8 #define mozilla_dom_ipc_VsyncMainChild_h
   9
  10 #include "mozilla/dom/VsyncChild.h"
  11 #include "nsTObserverArray.h"
  12
  13 namespace mozilla {
  14
  15 class VsyncObserver;
  16
  17 namespace dom {
  18
  19 // The PVsyncChild actor receives a vsync event from the main process and
  20 // delivers it to the child process. Currently this is restricted to the main
  21 // thread only. The actor will stay alive until the process dies or its
  22 // PVsyncParent actor dies.
  23 class VsyncMainChild final : public VsyncChild {
  24   NS_INLINE_DECL_REFCOUNTING(VsyncMainChild, override)
  25
  26   friend class PVsyncChild;
  27
  28  public:
  29   VsyncMainChild();
  30
  31   void AddChildRefreshTimer(VsyncObserver* aVsyncObserver);
  32   void RemoveChildRefreshTimer(VsyncObserver* aVsyncObserver);
  33
  34   TimeDuration GetVsyncRate();
  35
  36  private:
  37   ~VsyncMainChild() override;
  38
  39   mozilla::ipc::IPCResult RecvNotify(const VsyncEvent& aVsync,
  40                                      const float& aVsyncRate) override;
  41   void ActorDestroy(ActorDestroyReason aActorDestroyReason) override;
  42
  43   bool mIsShutdown;
  44   TimeDuration mVsyncRate;
  45   nsTObserverArray<VsyncObserver*> mObservers;
  46 };
  47
  48 }  // namespace dom
  49 }  // namespace mozilla
  50
  51 #endif  // mozilla_dom_ipc_VsyncChild_h