RuntimeService.h - mozsearch

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/* -*- 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/. */

#ifndef mozilla_dom_workers_runtimeservice_h__

#define mozilla_dom_workers_runtimeservice_h__

#include "mozilla/dom/WorkerCommon.h"

#include "nsIObserver.h"

#include "js/ContextOptions.h"

#include "MainThreadUtils.h"

#include "mozilla/dom/BindingDeclarations.h"

#include "mozilla/dom/SafeRefPtr.h"

#include "mozilla/dom/workerinternals/JSSettings.h"

#include "mozilla/Atomics.h"

#include "mozilla/Mutex.h"

#include "mozilla/StaticPtr.h"

#include "nsClassHashtable.h"

#include "nsHashKeys.h"

#include "nsTArray.h"

class nsPIDOMWindowInner;

namespace mozilla::dom {

struct WorkerLoadInfo;

class WorkerThread;

namespace workerinternals {

class RuntimeService final : public nsIObserver {

  struct WorkerDomainInfo {

    nsCString mDomain;

    nsTArray<WorkerPrivate*> mActiveWorkers;

    nsTArray<WorkerPrivate*> mActiveServiceWorkers;

    nsTArray<WorkerPrivate*> mQueuedWorkers;

    uint32_t mChildWorkerCount;

    WorkerDomainInfo() : mActiveWorkers(1), mChildWorkerCount(0) {}

    uint32_t ActiveWorkerCount() const {

      return mActiveWorkers.Length() + mChildWorkerCount;

    uint32_t ActiveServiceWorkerCount() const {

      return mActiveServiceWorkers.Length();

    bool HasNoWorkers() const {

      return ActiveWorkerCount() == 0 && ActiveServiceWorkerCount() == 0;

};

  mozilla::Mutex mMutex;

  // Protected by mMutex.

  nsClassHashtable<nsCStringHashKey, WorkerDomainInfo> mDomainMap

      MOZ_GUARDED_BY(mMutex);

  // *Not* protected by mMutex.

  nsClassHashtable<nsPtrHashKey<const nsPIDOMWindowInner>,

                   nsTArray<WorkerPrivate*> >

      mWindowMap;

  static StaticAutoPtr<workerinternals::JSSettings> sDefaultJSSettings;

 public:

  struct NavigatorProperties {

    nsString mAppVersion;

    nsString mAppVersionOverridden;

    nsString mPlatform;

    nsString mPlatformOverridden;

    CopyableTArray<nsString> mLanguages;

};

 private:

  NavigatorProperties mNavigatorProperties;

  // True when the observer service holds a reference to this object.

  bool mObserved;

  bool mShuttingDown;

  bool mNavigatorPropertiesLoaded;

 public:

  NS_DECL_ISUPPORTS

  NS_DECL_NSIOBSERVER

  static RuntimeService* GetOrCreateService();

  static RuntimeService* GetService();

  bool RegisterWorker(WorkerPrivate& aWorkerPrivate);

  void UnregisterWorker(WorkerPrivate& aWorkerPrivate);

  void CancelWorkersForWindow(const nsPIDOMWindowInner& aWindow);

  void FreezeWorkersForWindow(const nsPIDOMWindowInner& aWindow);

  void ThawWorkersForWindow(const nsPIDOMWindowInner& aWindow);

  void SuspendWorkersForWindow(const nsPIDOMWindowInner& aWindow);

  void ResumeWorkersForWindow(const nsPIDOMWindowInner& aWindow);

  void PropagateStorageAccessPermissionGranted(

      const nsPIDOMWindowInner& aWindow);

  const NavigatorProperties& GetNavigatorProperties() const {

    return mNavigatorProperties;

  static void GetDefaultJSSettings(workerinternals::JSSettings& aSettings) {

    AssertIsOnMainThread();

    aSettings = *sDefaultJSSettings;

  static void SetDefaultContextOptions(

      const JS::ContextOptions& aContextOptions) {

    AssertIsOnMainThread();

    sDefaultJSSettings->contextOptions = aContextOptions;

  void UpdateAppVersionOverridePreference(const nsAString& aValue);

  void UpdatePlatformOverridePreference(const nsAString& aValue);

  void UpdateAllWorkerContextOptions();

  void UpdateAllWorkerLanguages(const nsTArray<nsString>& aLanguages);

  static void SetDefaultJSGCSettings(JSGCParamKey aKey,

                                     Maybe<uint32_t> aValue) {

    AssertIsOnMainThread();

    sDefaultJSSettings->ApplyGCSetting(aKey, aValue);

  void UpdateAllWorkerMemoryParameter(JSGCParamKey aKey,

                                      Maybe<uint32_t> aValue);

#ifdef JS_GC_ZEAL

  static void SetDefaultGCZeal(uint8_t aGCZeal, uint32_t aFrequency) {

    AssertIsOnMainThread();

    sDefaultJSSettings->gcZeal = aGCZeal;

    sDefaultJSSettings->gcZealFrequency = aFrequency;

  void UpdateAllWorkerGCZeal();

#endif

  void SetLowMemoryStateAllWorkers(bool aState);

  void GarbageCollectAllWorkers(bool aShrinking);

  void CycleCollectAllWorkers();

  void SendOfflineStatusChangeEventToAllWorkers(bool aIsOffline);

  void MemoryPressureAllWorkers();

  uint32_t ClampedHardwareConcurrency(bool aShouldResistFingerprinting) const;

  void CrashIfHanging();

  bool IsShuttingDown() const { return mShuttingDown; }

  void DumpRunningWorkers();

 private:

  RuntimeService();

  ~RuntimeService();

  nsresult Init();

  void Shutdown();

  void Cleanup();

  void AddAllTopLevelWorkersToArray(nsTArray<WorkerPrivate*>& aWorkers)

      MOZ_REQUIRES(mMutex);

  nsTArray<WorkerPrivate*> GetWorkersForWindow(

      const nsPIDOMWindowInner& aWindow) const;

  bool ScheduleWorker(WorkerPrivate& aWorkerPrivate);

  template <typename Func>

  void BroadcastAllWorkers(const Func& aFunc);

};

}  // namespace workerinternals

}  // namespace mozilla::dom

#endif /* mozilla_dom_workers_runtimeservice_h__ */