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comparison: ipc/chromium/src/chrome/common/notification_service.cc
ipc/chromium/src/chrome/common/notification_service.cc
- branch
- TOR_BUG_9701
- changeset 11
- deefc01c0e14
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| -1:000000000000 | 0:9183c84e6d8d |
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| 1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "chrome/common/notification_service.h" | |
| 6 | |
| 7 #include "base/lazy_instance.h" | |
| 8 #include "base/thread_local.h" | |
| 9 | |
| 10 static base::LazyInstance<base::ThreadLocalPointer<NotificationService> > | |
| 11 lazy_tls_ptr(base::LINKER_INITIALIZED); | |
| 12 | |
| 13 // static | |
| 14 NotificationService* NotificationService::current() { | |
| 15 return lazy_tls_ptr.Pointer()->Get(); | |
| 16 } | |
| 17 | |
| 18 // static | |
| 19 bool NotificationService::HasKey(const NotificationSourceMap& map, | |
| 20 const NotificationSource& source) { | |
| 21 return map.find(source.map_key()) != map.end(); | |
| 22 } | |
| 23 | |
| 24 NotificationService::NotificationService() { | |
| 25 DCHECK(current() == NULL); | |
| 26 #ifndef NDEBUG | |
| 27 memset(observer_counts_, 0, sizeof(observer_counts_)); | |
| 28 #endif | |
| 29 | |
| 30 lazy_tls_ptr.Pointer()->Set(this); | |
| 31 } | |
| 32 | |
| 33 void NotificationService::AddObserver(NotificationObserver* observer, | |
| 34 NotificationType type, | |
| 35 const NotificationSource& source) { | |
| 36 DCHECK(type.value < NotificationType::NOTIFICATION_TYPE_COUNT); | |
| 37 | |
| 38 // We have gotten some crashes where the observer pointer is NULL. The problem | |
| 39 // is that this happens when we actually execute a notification, so have no | |
| 40 // way of knowing who the bad observer was. We want to know when this happens | |
| 41 // in release mode so we know what code to blame the crash on (since this is | |
| 42 // guaranteed to crash later). | |
| 43 CHECK(observer); | |
| 44 | |
| 45 NotificationObserverList* observer_list; | |
| 46 if (HasKey(observers_[type.value], source)) { | |
| 47 observer_list = observers_[type.value][source.map_key()]; | |
| 48 } else { | |
| 49 observer_list = new NotificationObserverList; | |
| 50 observers_[type.value][source.map_key()] = observer_list; | |
| 51 } | |
| 52 | |
| 53 observer_list->AddObserver(observer); | |
| 54 #ifndef NDEBUG | |
| 55 ++observer_counts_[type.value]; | |
| 56 #endif | |
| 57 } | |
| 58 | |
| 59 void NotificationService::RemoveObserver(NotificationObserver* observer, | |
| 60 NotificationType type, | |
| 61 const NotificationSource& source) { | |
| 62 DCHECK(type.value < NotificationType::NOTIFICATION_TYPE_COUNT); | |
| 63 DCHECK(HasKey(observers_[type.value], source)); | |
| 64 | |
| 65 NotificationObserverList* observer_list = | |
| 66 observers_[type.value][source.map_key()]; | |
| 67 if (observer_list) { | |
| 68 observer_list->RemoveObserver(observer); | |
| 69 #ifndef NDEBUG | |
| 70 --observer_counts_[type.value]; | |
| 71 #endif | |
| 72 } | |
| 73 | |
| 74 // TODO(jhughes): Remove observer list from map if empty? | |
| 75 } | |
| 76 | |
| 77 void NotificationService::Notify(NotificationType type, | |
| 78 const NotificationSource& source, | |
| 79 const NotificationDetails& details) { | |
| 80 DCHECK(type.value > NotificationType::ALL) << | |
| 81 "Allowed for observing, but not posting."; | |
| 82 DCHECK(type.value < NotificationType::NOTIFICATION_TYPE_COUNT); | |
| 83 | |
| 84 // There's no particular reason for the order in which the different | |
| 85 // classes of observers get notified here. | |
| 86 | |
| 87 // Notify observers of all types and all sources | |
| 88 if (HasKey(observers_[NotificationType::ALL], AllSources()) && | |
| 89 source != AllSources()) { | |
| 90 FOR_EACH_OBSERVER(NotificationObserver, | |
| 91 *observers_[NotificationType::ALL][AllSources().map_key()], | |
| 92 Observe(type, source, details)); | |
| 93 } | |
| 94 | |
| 95 // Notify observers of all types and the given source | |
| 96 if (HasKey(observers_[NotificationType::ALL], source)) { | |
| 97 FOR_EACH_OBSERVER(NotificationObserver, | |
| 98 *observers_[NotificationType::ALL][source.map_key()], | |
| 99 Observe(type, source, details)); | |
| 100 } | |
| 101 | |
| 102 // Notify observers of the given type and all sources | |
| 103 if (HasKey(observers_[type.value], AllSources()) && | |
| 104 source != AllSources()) { | |
| 105 FOR_EACH_OBSERVER(NotificationObserver, | |
| 106 *observers_[type.value][AllSources().map_key()], | |
| 107 Observe(type, source, details)); | |
| 108 } | |
| 109 | |
| 110 // Notify observers of the given type and the given source | |
| 111 if (HasKey(observers_[type.value], source)) { | |
| 112 FOR_EACH_OBSERVER(NotificationObserver, | |
| 113 *observers_[type.value][source.map_key()], | |
| 114 Observe(type, source, details)); | |
| 115 } | |
| 116 } | |
| 117 | |
| 118 | |
| 119 NotificationService::~NotificationService() { | |
| 120 lazy_tls_ptr.Pointer()->Set(NULL); | |
| 121 | |
| 122 #ifndef NDEBUG | |
| 123 for (int i = 0; i < NotificationType::NOTIFICATION_TYPE_COUNT; i++) { | |
| 124 if (observer_counts_[i] > 0) { | |
| 125 // This may not be completely fixable -- see | |
| 126 // http://code.google.com/p/chromium/issues/detail?id=11010 . | |
| 127 // But any new leaks should be fixed. | |
| 128 CHROMIUM_LOG(WARNING) << observer_counts_[i] << " notification observer(s) leaked" | |
| 129 << " of notification type " << i; | |
| 130 } | |
| 131 } | |
| 132 #endif | |
| 133 | |
| 134 for (int i = 0; i < NotificationType::NOTIFICATION_TYPE_COUNT; i++) { | |
| 135 NotificationSourceMap omap = observers_[i]; | |
| 136 for (NotificationSourceMap::iterator it = omap.begin(); | |
| 137 it != omap.end(); ++it) { | |
| 138 delete it->second; | |
| 139 } | |
| 140 } | |
| 141 } | |
| 142 | |
| 143 NotificationObserver::~NotificationObserver() {} |
