gecko-dev/gfx/ipc/VsyncBridgeParent.cpp

/* -*- 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/. */
#include "VsyncBridgeParent.h"
#include "mozilla/layers/CompositorBridgeParent.h"
#include "mozilla/layers/CompositorThread.h"

using mozilla::layers::CompositorBridgeParent;
using mozilla::layers::CompositorThreadHolder;

namespace mozilla {
namespace gfx {

RefPtr<VsyncBridgeParent> VsyncBridgeParent::Start(
    Endpoint<PVsyncBridgeParent>&& aEndpoint) {
  RefPtr<VsyncBridgeParent> parent = new VsyncBridgeParent();

  RefPtr<Runnable> task = NewRunnableMethod<Endpoint<PVsyncBridgeParent>&&>(
      "gfx::VsyncBridgeParent::Open", parent, &VsyncBridgeParent::Open,
      std::move(aEndpoint));
  CompositorThread()->Dispatch(task.forget());

  return parent;
}

VsyncBridgeParent::VsyncBridgeParent() : mOpen(false) {
  MOZ_COUNT_CTOR(VsyncBridgeParent);
  mCompositorThreadRef = CompositorThreadHolder::GetSingleton();
}

VsyncBridgeParent::~VsyncBridgeParent() { MOZ_COUNT_DTOR(VsyncBridgeParent); }

void VsyncBridgeParent::Open(Endpoint<PVsyncBridgeParent>&& aEndpoint) {
  if (!aEndpoint.Bind(this)) {
    // We can't recover from this.
    MOZ_CRASH("Failed to bind VsyncBridgeParent to endpoint");
  }
  AddRef();
  mOpen = true;
}

mozilla::ipc::IPCResult VsyncBridgeParent::RecvNotifyVsync(
    const VsyncEvent& aVsync, const LayersId& aLayersId) {
  CompositorBridgeParent::NotifyVsync(aVsync, aLayersId);
  return IPC_OK();
}

void VsyncBridgeParent::Shutdown() {
  if (!CompositorThreadHolder::IsInCompositorThread()) {
    CompositorThread()->Dispatch(
        NewRunnableMethod("gfx::VsyncBridgeParent::ShutdownImpl", this,
                          &VsyncBridgeParent::ShutdownImpl));
    return;
  }

  ShutdownImpl();
}

void VsyncBridgeParent::ShutdownImpl() {
  if (mOpen) {
    Close();
    mOpen = false;
  }
}

void VsyncBridgeParent::ActorDestroy(ActorDestroyReason aWhy) {
  mOpen = false;
  mCompositorThreadRef = nullptr;
}

void VsyncBridgeParent::ActorDealloc() { Release(); }

}  // namespace gfx
}  // namespace mozilla