The Tor Browser / file comparison
comparison: xpcom/ds/nsObserverList.h
xpcom/ds/nsObserverList.h
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:f8df308d94de |
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| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 #ifndef nsObserverList_h___ | |
| 7 #define nsObserverList_h___ | |
| 8 | |
| 9 #include "nsISupports.h" | |
| 10 #include "nsTArray.h" | |
| 11 #include "nsCOMPtr.h" | |
| 12 #include "nsCOMArray.h" | |
| 13 #include "nsIObserver.h" | |
| 14 #include "nsIWeakReference.h" | |
| 15 #include "nsHashKeys.h" | |
| 16 #include "nsISimpleEnumerator.h" | |
| 17 #include "mozilla/Attributes.h" | |
| 18 | |
| 19 namespace mozilla { | |
| 20 class ObserverServiceReporter; | |
| 21 } // namespace mozilla | |
| 22 | |
| 23 struct ObserverRef | |
| 24 { | |
| 25 ObserverRef(const ObserverRef& o) : | |
| 26 isWeakRef(o.isWeakRef), ref(o.ref) { } | |
| 27 | |
| 28 ObserverRef(nsIObserver* aObserver) : isWeakRef(false), ref(aObserver) { } | |
| 29 ObserverRef(nsIWeakReference* aWeak) : isWeakRef(true), ref(aWeak) { } | |
| 30 | |
| 31 bool isWeakRef; | |
| 32 nsCOMPtr<nsISupports> ref; | |
| 33 | |
| 34 nsIObserver* asObserver() { | |
| 35 NS_ASSERTION(!isWeakRef, "Isn't a strong ref."); | |
| 36 return static_cast<nsIObserver*>((nsISupports*) ref); | |
| 37 } | |
| 38 | |
| 39 nsIWeakReference* asWeak() { | |
| 40 NS_ASSERTION(isWeakRef, "Isn't a weak ref."); | |
| 41 return static_cast<nsIWeakReference*>((nsISupports*) ref); | |
| 42 } | |
| 43 | |
| 44 bool operator==(nsISupports* b) const { return ref == b; } | |
| 45 }; | |
| 46 | |
| 47 class nsObserverList : public nsCharPtrHashKey | |
| 48 { | |
| 49 friend class nsObserverService; | |
| 50 | |
| 51 public: | |
| 52 nsObserverList(const char *key) : nsCharPtrHashKey(key) | |
| 53 { MOZ_COUNT_CTOR(nsObserverList); } | |
| 54 | |
| 55 ~nsObserverList() { MOZ_COUNT_DTOR(nsObserverList); } | |
| 56 | |
| 57 nsresult AddObserver(nsIObserver* anObserver, bool ownsWeak); | |
| 58 nsresult RemoveObserver(nsIObserver* anObserver); | |
| 59 | |
| 60 void NotifyObservers(nsISupports *aSubject, | |
| 61 const char *aTopic, | |
| 62 const char16_t *someData); | |
| 63 nsresult GetObserverList(nsISimpleEnumerator** anEnumerator); | |
| 64 | |
| 65 // Fill an array with the observers of this category. | |
| 66 // The array is filled in last-added-first order. | |
| 67 void FillObserverArray(nsCOMArray<nsIObserver> &aArray); | |
| 68 | |
| 69 // Unmark any strongly held observers implemented in JS so the cycle | |
| 70 // collector will not traverse them. | |
| 71 void UnmarkGrayStrongObservers(); | |
| 72 | |
| 73 private: | |
| 74 nsTArray<ObserverRef> mObservers; | |
| 75 }; | |
| 76 | |
| 77 class nsObserverEnumerator MOZ_FINAL : public nsISimpleEnumerator | |
| 78 { | |
| 79 public: | |
| 80 NS_DECL_ISUPPORTS | |
| 81 NS_DECL_NSISIMPLEENUMERATOR | |
| 82 | |
| 83 nsObserverEnumerator(nsObserverList* aObserverList); | |
| 84 | |
| 85 private: | |
| 86 ~nsObserverEnumerator() { } | |
| 87 | |
| 88 int32_t mIndex; // Counts up from 0 | |
| 89 nsCOMArray<nsIObserver> mObservers; | |
| 90 }; | |
| 91 | |
| 92 #endif /* nsObserverList_h___ */ |
