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1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "content/common/notification_service.h" | 5 #include "content/common/notification_service.h" |
6 | 6 |
7 #include "base/lazy_instance.h" | 7 #include "base/lazy_instance.h" |
8 #include "base/threading/thread_local.h" | 8 #include "base/threading/thread_local.h" |
9 #include "content/common/notification_observer.h" | 9 #include "content/common/notification_observer.h" |
10 | 10 |
11 static base::LazyInstance<base::ThreadLocalPointer<NotificationService> > | 11 static base::LazyInstance<base::ThreadLocalPointer<NotificationService> > |
12 lazy_tls_ptr(base::LINKER_INITIALIZED); | 12 lazy_tls_ptr(base::LINKER_INITIALIZED); |
13 | 13 |
14 // static | 14 // static |
15 NotificationService* NotificationService::current() { | 15 NotificationService* NotificationService::current() { |
16 return lazy_tls_ptr.Pointer()->Get(); | 16 return lazy_tls_ptr.Pointer()->Get(); |
17 } | 17 } |
18 | 18 |
19 // static | 19 // static |
20 bool NotificationService::HasKey(const NotificationSourceMap& map, | 20 bool NotificationService::HasKey(const NotificationSourceMap& map, |
21 const NotificationSource& source) { | 21 const NotificationSource& source) { |
22 return map.find(source.map_key()) != map.end(); | 22 return map.find(source.map_key()) != map.end(); |
23 } | 23 } |
24 | 24 |
25 NotificationService::NotificationService() { | 25 NotificationService::NotificationService() { |
26 DCHECK(current() == NULL); | 26 DCHECK(current() == NULL); |
27 #ifndef NDEBUG | |
28 memset(observer_counts_, 0, sizeof(observer_counts_)); | |
29 #endif | |
30 | |
31 lazy_tls_ptr.Pointer()->Set(this); | 27 lazy_tls_ptr.Pointer()->Set(this); |
32 } | 28 } |
33 | 29 |
34 void NotificationService::AddObserver(NotificationObserver* observer, | 30 void NotificationService::AddObserver(NotificationObserver* observer, |
35 NotificationType type, | 31 int type, |
36 const NotificationSource& source) { | 32 const NotificationSource& source) { |
37 DCHECK(type.value < NotificationType::NOTIFICATION_TYPE_COUNT); | |
38 | |
39 // We have gotten some crashes where the observer pointer is NULL. The problem | 33 // We have gotten some crashes where the observer pointer is NULL. The problem |
40 // is that this happens when we actually execute a notification, so have no | 34 // is that this happens when we actually execute a notification, so have no |
41 // way of knowing who the bad observer was. We want to know when this happens | 35 // way of knowing who the bad observer was. We want to know when this happens |
42 // in release mode so we know what code to blame the crash on (since this is | 36 // in release mode so we know what code to blame the crash on (since this is |
43 // guaranteed to crash later). | 37 // guaranteed to crash later). |
44 CHECK(observer); | 38 CHECK(observer); |
45 | 39 |
46 NotificationObserverList* observer_list; | 40 NotificationObserverList* observer_list; |
47 if (HasKey(observers_[type.value], source)) { | 41 if (HasKey(observers_[type], source)) { |
48 observer_list = observers_[type.value][source.map_key()]; | 42 observer_list = observers_[type][source.map_key()]; |
49 } else { | 43 } else { |
50 observer_list = new NotificationObserverList; | 44 observer_list = new NotificationObserverList; |
51 observers_[type.value][source.map_key()] = observer_list; | 45 observers_[type][source.map_key()] = observer_list; |
52 } | 46 } |
53 | 47 |
54 observer_list->AddObserver(observer); | 48 observer_list->AddObserver(observer); |
55 #ifndef NDEBUG | 49 #ifndef NDEBUG |
56 ++observer_counts_[type.value]; | 50 ++observer_counts_[type]; |
57 #endif | 51 #endif |
58 } | 52 } |
59 | 53 |
60 void NotificationService::RemoveObserver(NotificationObserver* observer, | 54 void NotificationService::RemoveObserver(NotificationObserver* observer, |
61 NotificationType type, | 55 int type, |
62 const NotificationSource& source) { | 56 const NotificationSource& source) { |
63 DCHECK(type.value < NotificationType::NOTIFICATION_TYPE_COUNT); | |
64 | |
65 // This is a very serious bug. An object is most likely being deleted on | 57 // This is a very serious bug. An object is most likely being deleted on |
66 // the wrong thread, and as a result another thread's NotificationService | 58 // the wrong thread, and as a result another thread's NotificationService |
67 // has its deleted pointer in its map. A garbge object will be called in the | 59 // has its deleted pointer in its map. A garbge object will be called in the |
68 // future. | 60 // future. |
69 // NOTE: when this check shows crashes, use BrowserThread::DeleteOnIOThread or | 61 // NOTE: when this check shows crashes, use BrowserThread::DeleteOnIOThread or |
70 // other variants as the trait on the object. | 62 // other variants as the trait on the object. |
71 CHECK(HasKey(observers_[type.value], source)); | 63 CHECK(HasKey(observers_[type], source)); |
72 | 64 |
73 NotificationObserverList* observer_list = | 65 NotificationObserverList* observer_list = |
74 observers_[type.value][source.map_key()]; | 66 observers_[type][source.map_key()]; |
75 if (observer_list) { | 67 if (observer_list) { |
76 observer_list->RemoveObserver(observer); | 68 observer_list->RemoveObserver(observer); |
77 #ifndef NDEBUG | 69 #ifndef NDEBUG |
78 --observer_counts_[type.value]; | 70 --observer_counts_[type]; |
79 #endif | 71 #endif |
80 } | 72 } |
81 | 73 |
82 // TODO(jhughes): Remove observer list from map if empty? | 74 // TODO(jhughes): Remove observer list from map if empty? |
83 } | 75 } |
84 | 76 |
85 void NotificationService::Notify(NotificationType type, | 77 void NotificationService::Notify(int type, |
86 const NotificationSource& source, | 78 const NotificationSource& source, |
87 const NotificationDetails& details) { | 79 const NotificationDetails& details) { |
88 DCHECK(type.value > NotificationType::ALL) << | 80 DCHECK(type > content::NOTIFICATION_ALL) << |
89 "Allowed for observing, but not posting."; | 81 "Allowed for observing, but not posting."; |
90 DCHECK(type.value < NotificationType::NOTIFICATION_TYPE_COUNT); | |
91 | 82 |
92 // There's no particular reason for the order in which the different | 83 // There's no particular reason for the order in which the different |
93 // classes of observers get notified here. | 84 // classes of observers get notified here. |
94 | 85 |
95 // Notify observers of all types and all sources | 86 // Notify observers of all types and all sources |
96 if (HasKey(observers_[NotificationType::ALL], AllSources()) && | 87 if (HasKey(observers_[content::NOTIFICATION_ALL], AllSources()) && |
97 source != AllSources()) { | 88 source != AllSources()) { |
98 FOR_EACH_OBSERVER(NotificationObserver, | 89 FOR_EACH_OBSERVER(NotificationObserver, |
99 *observers_[NotificationType::ALL][AllSources().map_key()], | 90 *observers_[content::NOTIFICATION_ALL][AllSources().map_key()], |
100 Observe(type, source, details)); | 91 Observe(type, source, details)); |
101 } | 92 } |
102 | 93 |
103 // Notify observers of all types and the given source | 94 // Notify observers of all types and the given source |
104 if (HasKey(observers_[NotificationType::ALL], source)) { | 95 if (HasKey(observers_[content::NOTIFICATION_ALL], source)) { |
105 FOR_EACH_OBSERVER(NotificationObserver, | 96 FOR_EACH_OBSERVER(NotificationObserver, |
106 *observers_[NotificationType::ALL][source.map_key()], | 97 *observers_[content::NOTIFICATION_ALL][source.map_key()], |
107 Observe(type, source, details)); | 98 Observe(type, source, details)); |
108 } | 99 } |
109 | 100 |
110 // Notify observers of the given type and all sources | 101 // Notify observers of the given type and all sources |
111 if (HasKey(observers_[type.value], AllSources()) && | 102 if (HasKey(observers_[type], AllSources()) && |
112 source != AllSources()) { | 103 source != AllSources()) { |
113 FOR_EACH_OBSERVER(NotificationObserver, | 104 FOR_EACH_OBSERVER(NotificationObserver, |
114 *observers_[type.value][AllSources().map_key()], | 105 *observers_[type][AllSources().map_key()], |
115 Observe(type, source, details)); | 106 Observe(type, source, details)); |
116 } | 107 } |
117 | 108 |
118 // Notify observers of the given type and the given source | 109 // Notify observers of the given type and the given source |
119 if (HasKey(observers_[type.value], source)) { | 110 if (HasKey(observers_[type], source)) { |
120 FOR_EACH_OBSERVER(NotificationObserver, | 111 FOR_EACH_OBSERVER(NotificationObserver, |
121 *observers_[type.value][source.map_key()], | 112 *observers_[type][source.map_key()], |
122 Observe(type, source, details)); | 113 Observe(type, source, details)); |
123 } | 114 } |
124 } | 115 } |
125 | 116 |
126 | 117 |
127 NotificationService::~NotificationService() { | 118 NotificationService::~NotificationService() { |
128 lazy_tls_ptr.Pointer()->Set(NULL); | 119 lazy_tls_ptr.Pointer()->Set(NULL); |
129 | 120 |
130 #ifndef NDEBUG | 121 #ifndef NDEBUG |
131 for (int i = 0; i < NotificationType::NOTIFICATION_TYPE_COUNT; i++) { | 122 for (size_t i = 0; i < observer_counts_.size(); i++) { |
132 if (observer_counts_[i] > 0) { | 123 if (observer_counts_[i] > 0) { |
133 // This may not be completely fixable -- see | 124 // This may not be completely fixable -- see |
134 // http://code.google.com/p/chromium/issues/detail?id=11010 . | 125 // http://code.google.com/p/chromium/issues/detail?id=11010 . |
135 VLOG(1) << observer_counts_[i] << " notification observer(s) leaked " | 126 VLOG(1) << observer_counts_[i] << " notification observer(s) leaked " |
136 "of notification type " << i; | 127 "of notification type " << i; |
137 } | 128 } |
138 } | 129 } |
139 #endif | 130 #endif |
140 | 131 |
141 for (int i = 0; i < NotificationType::NOTIFICATION_TYPE_COUNT; i++) { | 132 for (size_t i = 0; i < observers_.size(); i++) { |
142 NotificationSourceMap omap = observers_[i]; | 133 NotificationSourceMap omap = observers_[i]; |
143 for (NotificationSourceMap::iterator it = omap.begin(); | 134 for (NotificationSourceMap::iterator it = omap.begin(); |
144 it != omap.end(); ++it) | 135 it != omap.end(); ++it) |
145 delete it->second; | 136 delete it->second; |
146 } | 137 } |
147 } | 138 } |
148 | 139 |
149 NotificationObserver::NotificationObserver() {} | 140 NotificationObserver::NotificationObserver() {} |
150 | 141 |
151 NotificationObserver::~NotificationObserver() {} | 142 NotificationObserver::~NotificationObserver() {} |
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