tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
Log | Files | Refs | README | LICENSE

LayerTreeOwnerTracker.cpp (2333B)

      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 #include "LayerTreeOwnerTracker.h"
      8 
      9 #include "mozilla/StaticPtr.h"              // for StaticAutoPtr
     10 #include "mozilla/gfx/GPUChild.h"           // for GPUChild
     11 #include "mozilla/gfx/GPUProcessManager.h"  // for GPUProcessManager
     12 
     13 #include <functional>
     14 
     15 namespace mozilla {
     16 namespace layers {
     17 
     18 static StaticAutoPtr<LayerTreeOwnerTracker> sSingleton;
     19 
     20 LayerTreeOwnerTracker::LayerTreeOwnerTracker()
     21    : mLayerIdsLock("LayerTreeOwnerTrackerLock") {}
     22 
     23 void LayerTreeOwnerTracker::Initialize() {
     24  MOZ_ASSERT(!sSingleton);
     25  sSingleton = new LayerTreeOwnerTracker();
     26 }
     27 
     28 void LayerTreeOwnerTracker::Shutdown() { sSingleton = nullptr; }
     29 
     30 LayerTreeOwnerTracker* LayerTreeOwnerTracker::Get() { return sSingleton; }
     31 
     32 void LayerTreeOwnerTracker::Map(LayersId aLayersId,
     33                                base::ProcessId aProcessId) {
     34  MutexAutoLock lock(mLayerIdsLock);
     35 
     36  // Add the mapping to the list
     37  const auto i = mLayerIds.insert({aLayersId, aProcessId});
     38  MOZ_ASSERT(i.second, "Mapping already used layers ID!");
     39  (void)i;
     40 }
     41 
     42 void LayerTreeOwnerTracker::Unmap(LayersId aLayersId,
     43                                  base::ProcessId aProcessId) {
     44  MutexAutoLock lock(mLayerIdsLock);
     45 
     46  auto i = mLayerIds.find(aLayersId);
     47  if (i == mLayerIds.end()) {
     48    return;
     49  }
     50 
     51  if (NS_WARN_IF(i->second != aProcessId)) {
     52    MOZ_ASSERT_UNREACHABLE("Unmapping layers ID for another process!");
     53    return;
     54  }
     55 
     56  mLayerIds.erase(i);
     57 }
     58 
     59 bool LayerTreeOwnerTracker::IsMapped(LayersId aLayersId,
     60                                     base::ProcessId aProcessId) {
     61  MutexAutoLock lock(mLayerIdsLock);
     62 
     63  auto iter = mLayerIds.find(aLayersId);
     64  return iter != mLayerIds.end() && iter->second == aProcessId;
     65 }
     66 
     67 void LayerTreeOwnerTracker::Iterate(
     68    const std::function<void(LayersId aLayersId, base::ProcessId aProcessId)>&
     69        aCallback) {
     70  MutexAutoLock lock(mLayerIdsLock);
     71 
     72  for (const auto& iter : mLayerIds) {
     73    aCallback(iter.first, iter.second);
     74  }
     75 }
     76 
     77 }  // namespace layers
     78 }  // namespace mozilla