nsObserverService.h

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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 nsObserverService_h___

#define nsObserverService_h___

#include "nsIObserverService.h"

#include "nsObserverList.h"

#include "nsIMemoryReporter.h"

#include "nsTHashtable.h"

#include "mozilla/Attributes.h"

// {D07F5195-E3D1-11d2-8ACD-00105A1B8860}

#define NS_OBSERVERSERVICE_CID                      \

  {                                                 \

    0xd07f5195, 0xe3d1, 0x11d2, {                   \

      0x8a, 0xcd, 0x0, 0x10, 0x5a, 0x1b, 0x88, 0x60 \

    }                                               \

class nsObserverService final : public nsIObserverService,

                                public nsIMemoryReporter {

 public:

  NS_DECLARE_STATIC_IID_ACCESSOR(NS_OBSERVERSERVICE_CID)

  nsObserverService();

  NS_DECL_ISUPPORTS

  NS_DECL_NSIOBSERVERSERVICE

  NS_DECL_NSIMEMORYREPORTER

  void Shutdown();

  [[nodiscard]] static nsresult Create(const nsIID& aIID, void** aInstancePtr);

  // Unmark any strongly held observers implemented in JS so the cycle

  // collector will not traverse them.

  NS_IMETHOD UnmarkGrayStrongObservers();

 private:

  ~nsObserverService(void);

  void RegisterReporter();

  nsresult EnsureValidCall() const;

  nsresult FilterHttpOnTopics(const char* aTopic);

  static const size_t kSuspectReferentCount = 100;

  bool mShuttingDown;

  nsTHashtable<nsObserverList> mObserverTopicTable;

};

NS_DEFINE_STATIC_IID_ACCESSOR(nsObserverService, NS_OBSERVERSERVICE_CID)

#endif /* nsObserverService_h___ */