/* -*- 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 "LayerTreeOwnerTracker.h"

#include "mozilla/StaticPtr.h"              // for StaticAutoPtr

#include "mozilla/dom/ContentParent.h"      // for ContentParent

#include "mozilla/gfx/GPUChild.h"           // for GPUChild

#include "mozilla/gfx/GPUProcessManager.h"  // for GPUProcessManager

#include <functional>

#include <utility> // for std::make_pair

namespace mozilla {

namespace layers {

static StaticAutoPtr<LayerTreeOwnerTracker> sSingleton;

LayerTreeOwnerTracker::LayerTreeOwnerTracker() :

  mLayerIdsLock("LayerTreeOwnerTrackerLock")

{

}

void

LayerTreeOwnerTracker::Initialize()

{

  MOZ_ASSERT(!sSingleton);

  sSingleton = new LayerTreeOwnerTracker();

}

void

LayerTreeOwnerTracker::Shutdown()

{

  sSingleton = nullptr;

}

LayerTreeOwnerTracker*

LayerTreeOwnerTracker::Get()

{

  return sSingleton;

}

void

LayerTreeOwnerTracker::Map(LayersId aLayersId, base::ProcessId aProcessId)

{

  MutexAutoLock lock(mLayerIdsLock);

  // Add the mapping to the list

  mLayerIds[aLayersId] = aProcessId;

}

void

LayerTreeOwnerTracker::Unmap(LayersId aLayersId, base::ProcessId aProcessId)

{

  MutexAutoLock lock(mLayerIdsLock);

  MOZ_ASSERT(mLayerIds[aLayersId] == aProcessId);

  mLayerIds.erase(aLayersId);

}

bool

LayerTreeOwnerTracker::IsMapped(LayersId aLayersId, base::ProcessId aProcessId)

{

  MutexAutoLock lock(mLayerIdsLock);

  auto iter = mLayerIds.find(aLayersId);

  return iter != mLayerIds.end() && iter->second == aProcessId;

}

void

LayerTreeOwnerTracker::Iterate(const std::function<void(LayersId aLayersId, base::ProcessId aProcessId)>& aCallback)

{

  MutexAutoLock lock(mLayerIdsLock);

  for (const auto& iter : mLayerIds) {

    aCallback(iter.first, iter.second);

  }

}

} // namespace layers

} // namespace mozilla