DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Header

Mercurial (b6d82b1a6b02)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166
/* -*- 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 "PerformanceStorageWorker.h"
#include "mozilla/dom/WorkerRef.h"
#include "mozilla/dom/WorkerRunnable.h"
#include "mozilla/dom/WorkerPrivate.h"

namespace mozilla {
namespace dom {

class PerformanceProxyData {
 public:
  PerformanceProxyData(UniquePtr<PerformanceTimingData>&& aData,
                       const nsAString& aInitiatorType,
                       const nsAString& aEntryName)
      : mData(std::move(aData)),
        mInitiatorType(aInitiatorType),
        mEntryName(aEntryName) {}

  UniquePtr<PerformanceTimingData> mData;
  nsString mInitiatorType;
  nsString mEntryName;
};

namespace {

// Here we use control runnable because this code must be executed also when in
// a sync event loop
class PerformanceEntryAdder final : public WorkerControlRunnable {
 public:
  PerformanceEntryAdder(WorkerPrivate* aWorkerPrivate,
                        PerformanceStorageWorker* aStorage,
                        UniquePtr<PerformanceProxyData>&& aData)
      : WorkerControlRunnable(aWorkerPrivate, WorkerThreadUnchangedBusyCount),
        mStorage(aStorage),
        mData(std::move(aData)) {}

  bool WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override {
    mStorage->AddEntryOnWorker(std::move(mData));
    return true;
  }

  nsresult Cancel() override {
    mStorage->ShutdownOnWorker();
    return WorkerRunnable::Cancel();
  }

  bool PreDispatch(WorkerPrivate* aWorkerPrivate) override { return true; }

  void PostDispatch(WorkerPrivate* aWorkerPrivate,
                    bool aDispatchResult) override {}

 private:
  RefPtr<PerformanceStorageWorker> mStorage;
  UniquePtr<PerformanceProxyData> mData;
};

}  // namespace

/* static */
already_AddRefed<PerformanceStorageWorker> PerformanceStorageWorker::Create(
    WorkerPrivate* aWorkerPrivate) {
  MOZ_ASSERT(aWorkerPrivate);
  aWorkerPrivate->AssertIsOnWorkerThread();

  RefPtr<PerformanceStorageWorker> storage = new PerformanceStorageWorker();

  storage->mWorkerRef = WeakWorkerRef::Create(
      aWorkerPrivate, [storage]() { storage->ShutdownOnWorker(); });

  // PerformanceStorageWorker is created at the creation time of the worker.
  MOZ_ASSERT(storage->mWorkerRef);

  return storage.forget();
}

PerformanceStorageWorker::PerformanceStorageWorker()
    : mMutex("PerformanceStorageWorker::mMutex") {}

PerformanceStorageWorker::~PerformanceStorageWorker() = default;

void PerformanceStorageWorker::AddEntry(nsIHttpChannel* aChannel,
                                        nsITimedChannel* aTimedChannel) {
  MOZ_ASSERT(NS_IsMainThread());

  MutexAutoLock lock(mMutex);

  if (!mWorkerRef) {
    return;
  }

  // If we have mWorkerRef, we haven't received the WorkerRef notification and
  // we haven't yet call ShutdownOnWorker, which uses the mutex.
  WorkerPrivate* workerPrivate = mWorkerRef->GetUnsafePrivate();
  MOZ_ASSERT(workerPrivate);

  nsAutoString initiatorType;
  nsAutoString entryName;

  UniquePtr<PerformanceTimingData> performanceTimingData(
      PerformanceTimingData::Create(aTimedChannel, aChannel, 0, initiatorType,
                                    entryName));
  if (!performanceTimingData) {
    return;
  }

  UniquePtr<PerformanceProxyData> data(new PerformanceProxyData(
      std::move(performanceTimingData), initiatorType, entryName));

  RefPtr<PerformanceEntryAdder> r =
      new PerformanceEntryAdder(workerPrivate, this, std::move(data));
  Unused << NS_WARN_IF(!r->Dispatch());
}

void PerformanceStorageWorker::ShutdownOnWorker() {
  MutexAutoLock lock(mMutex);

  if (!mWorkerRef) {
    return;
  }

  MOZ_ASSERT(IsCurrentThreadRunningWorker());

  mWorkerRef = nullptr;
}

void PerformanceStorageWorker::AddEntryOnWorker(
    UniquePtr<PerformanceProxyData>&& aData) {
  RefPtr<Performance> performance;
  UniquePtr<PerformanceProxyData> data = std::move(aData);

  {
    MutexAutoLock lock(mMutex);

    if (!mWorkerRef) {
      return;
    }

    // We must have the workerPrivate because it is available until a
    // notification is received by WorkerRef and we use mutex to make the code
    // protected.
    WorkerPrivate* workerPrivate = mWorkerRef->GetPrivate();
    MOZ_ASSERT(workerPrivate);

    WorkerGlobalScope* scope = workerPrivate->GlobalScope();
    performance = scope->GetPerformance();
  }

  if (NS_WARN_IF(!performance)) {
    return;
  }

  RefPtr<PerformanceResourceTiming> performanceEntry =
      new PerformanceResourceTiming(std::move(data->mData), performance,
                                    data->mEntryName);
  performanceEntry->SetInitiatorType(data->mInitiatorType);

  performance->InsertResourceEntry(performanceEntry);
}

}  // namespace dom
}  // namespace mozilla