dom/ipc/VsyncParent.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_VsyncParent_h
   8 #define mozilla_dom_ipc_VsyncParent_h
   9
  10 #include "mozilla/dom/PVsyncParent.h"
  11 #include "mozilla/VsyncDispatcher.h"
  12 #include "nsCOMPtr.h"
  13 #include "mozilla/RefPtr.h"
  14
  15 class nsIThread;
  16
  17 namespace mozilla::dom {
  18
  19 // Use PBackground thread in the main process to send vsync notifications to
  20 // content process. This actor will be released when its parent protocol calls
  21 // DeallocPVsyncParent().
  22 class VsyncParent final : public PVsyncParent, public VsyncObserver {
  23   friend class PVsyncParent;
  24
  25   NS_INLINE_DECL_THREADSAFE_REFCOUNTING(VsyncParent, override)
  26
  27  public:
  28   VsyncParent();
  29   void UpdateVsyncDispatcher(const RefPtr<VsyncDispatcher>& aVsyncDispatcher);
  30
  31  private:
  32   virtual ~VsyncParent() = default;
  33
  34   void NotifyVsync(const VsyncEvent& aVsync) override;
  35   virtual void ActorDestroy(ActorDestroyReason aActorDestroyReason) override;
  36
  37   mozilla::ipc::IPCResult RecvObserve();
  38   mozilla::ipc::IPCResult RecvUnobserve();
  39
  40   void DispatchVsyncEvent(const VsyncEvent& aVsync);
  41   void UpdateVsyncRate();
  42
  43   bool IsOnInitialThread();
  44   void AssertIsOnInitialThread();
  45
  46   bool mObservingVsync;
  47   bool mDestroyed;
  48   nsCOMPtr<nsIThread> mInitialThread;
  49   RefPtr<VsyncDispatcher> mVsyncDispatcher;
  50 };
  51
  52 }  // namespace mozilla::dom
  53
  54 #endif  // mozilla_dom_ipc_VsyncParent_h