xpcom/ds/nsObserverService.h

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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 nsObserverService_h___
7 #define nsObserverService_h___
8
9 #include "nsIObserverService.h"
10 #include "nsObserverList.h"
11 #include "nsIMemoryReporter.h"
12 #include "nsTHashtable.h"
13 #include "mozilla/Attributes.h"
14
15 // {D07F5195-E3D1-11d2-8ACD-00105A1B8860}
16 #define NS_OBSERVERSERVICE_CID \
17 { 0xd07f5195, 0xe3d1, 0x11d2, { 0x8a, 0xcd, 0x0, 0x10, 0x5a, 0x1b, 0x88, 0x60 } }
18
19 class nsIMemoryReporter;
20
21 class nsObserverService MOZ_FINAL
22 : public nsIObserverService
23 , public nsIMemoryReporter
24 {
25 public:
26 NS_DECLARE_STATIC_IID_ACCESSOR(NS_OBSERVERSERVICE_CID)
27
28 nsObserverService();
29
30 NS_DECL_ISUPPORTS
31 NS_DECL_NSIOBSERVERSERVICE
32 NS_DECL_NSIMEMORYREPORTER
33
34 void Shutdown();
35
36 static nsresult
37 Create(nsISupports* outer, const nsIID& aIID, void* *aInstancePtr);
38
39 // Unmark any strongly held observers implemented in JS so the cycle
40 // collector will not traverse them.
41 NS_IMETHOD UnmarkGrayStrongObservers();
42
43 private:
44 ~nsObserverService(void);
45 void RegisterReporter();
46
47 static const size_t kSuspectReferentCount = 100;
48 static PLDHashOperator CountReferents(nsObserverList* aObserverList,
49 void* aClosure);
50 bool mShuttingDown;
51 nsTHashtable<nsObserverList> mObserverTopicTable;
52 };
53
54 NS_DEFINE_STATIC_IID_ACCESSOR(nsObserverService, NS_OBSERVERSERVICE_CID)
55
56 #endif /* nsObserverService_h___ */

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