xpcom/ds/nsObserverService.h
author Edwin Flores <eflores@mozilla.com>
Fri, 30 Jan 2015 16:54:12 +1300
changeset 243625 c76f32421541b5add9393bf335952aa03116bc7e
parent 213985 57038b3a8c97d91bd5a6a947d47e85a8882ec167
child 257987 a20c7910a82fa2df2f3398c1108d102bac9128b0
permissions -rw-r--r--
Bug 1127115 - Make MP4 parser assertion non-fatal. r=ajones, a=sledru

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 nsIMemoryReporter;

class nsObserverService MOZ_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();

  static nsresult Create(nsISupports* aOuter, 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();

  static const size_t kSuspectReferentCount = 100;
  static PLDHashOperator CountReferents(nsObserverList* aObserverList,
                                        void* aClosure);
  bool mShuttingDown;
  nsTHashtable<nsObserverList> mObserverTopicTable;
};

NS_DEFINE_STATIC_IID_ACCESSOR(nsObserverService, NS_OBSERVERSERVICE_CID)

#endif /* nsObserverService_h___ */