author Edwin Flores <eflores@mozilla.com>
Fri, 30 Jan 2015 16:54:12 +1300
changeset 243625 c76f32421541b5add9393bf335952aa03116bc7e
parent 218038 f4d4f1580853eb5d8c020cd4725f5fb8a28eca02
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 nsObserverList_h___
#define nsObserverList_h___

#include "nsISupports.h"
#include "nsTArray.h"
#include "nsCOMPtr.h"
#include "nsCOMArray.h"
#include "nsIObserver.h"
#include "nsIWeakReference.h"
#include "nsHashKeys.h"
#include "nsISimpleEnumerator.h"
#include "mozilla/Attributes.h"

namespace mozilla {
class ObserverServiceReporter;
} // namespace mozilla

struct ObserverRef
  ObserverRef(const ObserverRef& aO) : isWeakRef(aO.isWeakRef), ref(aO.ref) {}
  explicit ObserverRef(nsIObserver* aObserver) : isWeakRef(false), ref(aObserver) {}
  explicit ObserverRef(nsIWeakReference* aWeak) : isWeakRef(true), ref(aWeak) {}

  bool isWeakRef;
  nsCOMPtr<nsISupports> ref;

  nsIObserver* asObserver()
    NS_ASSERTION(!isWeakRef, "Isn't a strong ref.");
    return static_cast<nsIObserver*>((nsISupports*)ref);

  nsIWeakReference* asWeak()
    NS_ASSERTION(isWeakRef, "Isn't a weak ref.");
    return static_cast<nsIWeakReference*>((nsISupports*)ref);

  bool operator==(nsISupports* aRhs) const { return ref == aRhs; }

class nsObserverList : public nsCharPtrHashKey
  friend class nsObserverService;

  explicit nsObserverList(const char* aKey) : nsCharPtrHashKey(aKey)


  nsresult AddObserver(nsIObserver* aObserver, bool aOwnsWeak);
  nsresult RemoveObserver(nsIObserver* aObserver);

  void NotifyObservers(nsISupports* aSubject,
                       const char* aTopic,
                       const char16_t* aSomeData);
  nsresult GetObserverList(nsISimpleEnumerator** aEnumerator);

  // Fill an array with the observers of this category.
  // The array is filled in last-added-first order.
  void FillObserverArray(nsCOMArray<nsIObserver>& aArray);

  // Unmark any strongly held observers implemented in JS so the cycle
  // collector will not traverse them.
  void UnmarkGrayStrongObservers();

  nsTArray<ObserverRef> mObservers;

class nsObserverEnumerator MOZ_FINAL : public nsISimpleEnumerator

  explicit nsObserverEnumerator(nsObserverList* aObserverList);

  ~nsObserverEnumerator() {}

  int32_t mIndex; // Counts up from 0
  nsCOMArray<nsIObserver> mObservers;

#endif /* nsObserverList_h___ */