/* -*- 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 "VsyncChild.h"

#include "mozilla/SchedulerGroup.h"

#include "mozilla/VsyncDispatcher.h"

#include "nsThreadUtils.h"

namespace mozilla {

namespace layout {

VsyncChild::VsyncChild()

    : mObservingVsync(false),

      mIsShutdown(false),

      mVsyncRate(TimeDuration::Forever()) {

  MOZ_ASSERT(NS_IsMainThread());

}

VsyncChild::~VsyncChild() { MOZ_ASSERT(NS_IsMainThread()); }

bool VsyncChild::SendObserve() {

  MOZ_ASSERT(NS_IsMainThread());

  if (!mObservingVsync && !mIsShutdown) {

    mObservingVsync = true;

    PVsyncChild::SendObserve();

  }

  return true;

}

bool VsyncChild::SendUnobserve() {

  MOZ_ASSERT(NS_IsMainThread());

  if (mObservingVsync && !mIsShutdown) {

    mObservingVsync = false;

    PVsyncChild::SendUnobserve();

  }

  return true;

}

void VsyncChild::ActorDestroy(ActorDestroyReason aActorDestroyReason) {

  MOZ_ASSERT(NS_IsMainThread());

  MOZ_ASSERT(!mIsShutdown);

  mIsShutdown = true;

  mObserver = nullptr;

}

mozilla::ipc::IPCResult VsyncChild::RecvNotify(

    const TimeStamp& aVsyncTimestamp) {

  MOZ_ASSERT(NS_IsMainThread());

  MOZ_ASSERT(!mIsShutdown);

  SchedulerGroup::MarkVsyncRan();

  if (mObservingVsync && mObserver) {

    mObserver->NotifyVsync(aVsyncTimestamp);

  }

  return IPC_OK();

}

void VsyncChild::SetVsyncObserver(VsyncObserver* aVsyncObserver) {

  MOZ_ASSERT(NS_IsMainThread());

  mObserver = aVsyncObserver;

}

TimeDuration VsyncChild::GetVsyncRate() {

  if (mVsyncRate == TimeDuration::Forever()) {

    PVsyncChild::SendRequestVsyncRate();

  }

  return mVsyncRate;

}

TimeDuration VsyncChild::VsyncRate() { return mVsyncRate; }

mozilla::ipc::IPCResult VsyncChild::RecvVsyncRate(const float& aVsyncRate) {

  mVsyncRate = TimeDuration::FromMilliseconds(aVsyncRate);

  return IPC_OK();

}

}  // namespace layout

}  // namespace mozilla