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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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/browser/notification_service_impl.h" | 5 #include "content/browser/notification_service_impl.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/public/browser/notification_observer.h" | 9 #include "content/public/browser/notification_observer.h" |
| 10 #include "content/public/browser/notification_types.h" | 10 #include "content/public/browser/notification_types.h" |
| 11 | 11 |
| 12 namespace content { | |
| 13 | |
| 14 static base::LazyInstance<base::ThreadLocalPointer<NotificationServiceImpl> > | 12 static base::LazyInstance<base::ThreadLocalPointer<NotificationServiceImpl> > |
| 15 lazy_tls_ptr = LAZY_INSTANCE_INITIALIZER; | 13 lazy_tls_ptr = LAZY_INSTANCE_INITIALIZER; |
| 16 | 14 |
| 17 // static | 15 // static |
| 18 NotificationServiceImpl* NotificationServiceImpl::current() { | 16 NotificationServiceImpl* NotificationServiceImpl::current() { |
| 19 return lazy_tls_ptr.Pointer()->Get(); | 17 return lazy_tls_ptr.Pointer()->Get(); |
| 20 } | 18 } |
| 21 | 19 |
| 22 // static | 20 // static |
| 23 NotificationService* NotificationService::current() { | 21 content::NotificationService* content::NotificationService::current() { |
| 24 return NotificationServiceImpl::current(); | 22 return NotificationServiceImpl::current(); |
| 25 } | 23 } |
| 26 | 24 |
| 27 // static | 25 // static |
| 28 NotificationService* NotificationService::Create() { | 26 content::NotificationService* content::NotificationService::Create() { |
| 29 return new NotificationServiceImpl; | 27 return new NotificationServiceImpl; |
| 30 } | 28 } |
| 31 | 29 |
| 32 // static | 30 // static |
| 33 bool NotificationServiceImpl::HasKey(const NotificationSourceMap& map, | 31 bool NotificationServiceImpl::HasKey(const NotificationSourceMap& map, |
| 34 const NotificationSource& source) { | 32 const content::NotificationSource& source) { |
| 35 return map.find(source.map_key()) != map.end(); | 33 return map.find(source.map_key()) != map.end(); |
| 36 } | 34 } |
| 37 | 35 |
| 38 NotificationServiceImpl::NotificationServiceImpl() { | 36 NotificationServiceImpl::NotificationServiceImpl() { |
| 39 DCHECK(current() == NULL); | 37 DCHECK(current() == NULL); |
| 40 lazy_tls_ptr.Pointer()->Set(this); | 38 lazy_tls_ptr.Pointer()->Set(this); |
| 41 } | 39 } |
| 42 | 40 |
| 43 void NotificationServiceImpl::AddObserver(NotificationObserver* observer, | 41 void NotificationServiceImpl::AddObserver( |
| 44 int type, | 42 content::NotificationObserver* observer, |
| 45 const NotificationSource& source) { | 43 int type, |
| 44 const content::NotificationSource& source) { |
| 46 // We have gotten some crashes where the observer pointer is NULL. The problem | 45 // We have gotten some crashes where the observer pointer is NULL. The problem |
| 47 // is that this happens when we actually execute a notification, so have no | 46 // is that this happens when we actually execute a notification, so have no |
| 48 // way of knowing who the bad observer was. We want to know when this happens | 47 // way of knowing who the bad observer was. We want to know when this happens |
| 49 // in release mode so we know what code to blame the crash on (since this is | 48 // in release mode so we know what code to blame the crash on (since this is |
| 50 // guaranteed to crash later). | 49 // guaranteed to crash later). |
| 51 CHECK(observer); | 50 CHECK(observer); |
| 52 | 51 |
| 53 NotificationObserverList* observer_list; | 52 NotificationObserverList* observer_list; |
| 54 if (HasKey(observers_[type], source)) { | 53 if (HasKey(observers_[type], source)) { |
| 55 observer_list = observers_[type][source.map_key()]; | 54 observer_list = observers_[type][source.map_key()]; |
| 56 } else { | 55 } else { |
| 57 observer_list = new NotificationObserverList; | 56 observer_list = new NotificationObserverList; |
| 58 observers_[type][source.map_key()] = observer_list; | 57 observers_[type][source.map_key()] = observer_list; |
| 59 } | 58 } |
| 60 | 59 |
| 61 observer_list->AddObserver(observer); | 60 observer_list->AddObserver(observer); |
| 62 #ifndef NDEBUG | 61 #ifndef NDEBUG |
| 63 ++observer_counts_[type]; | 62 ++observer_counts_[type]; |
| 64 #endif | 63 #endif |
| 65 } | 64 } |
| 66 | 65 |
| 67 void NotificationServiceImpl::RemoveObserver(NotificationObserver* observer, | 66 void NotificationServiceImpl::RemoveObserver( |
| 68 int type, | 67 content::NotificationObserver* observer, |
| 69 const NotificationSource& source) { | 68 int type, |
| 69 const content::NotificationSource& source) { |
| 70 // This is a very serious bug. An object is most likely being deleted on | 70 // This is a very serious bug. An object is most likely being deleted on |
| 71 // the wrong thread, and as a result another thread's NotificationServiceImpl | 71 // the wrong thread, and as a result another thread's NotificationServiceImpl |
| 72 // has its deleted pointer in its map. A garbge object will be called in the | 72 // has its deleted pointer in its map. A garbge object will be called in the |
| 73 // future. | 73 // future. |
| 74 // NOTE: when this check shows crashes, use BrowserThread::DeleteOnIOThread or | 74 // NOTE: when this check shows crashes, use BrowserThread::DeleteOnIOThread or |
| 75 // other variants as the trait on the object. | 75 // other variants as the trait on the object. |
| 76 CHECK(HasKey(observers_[type], source)); | 76 CHECK(HasKey(observers_[type], source)); |
| 77 | 77 |
| 78 NotificationObserverList* observer_list = | 78 NotificationObserverList* observer_list = |
| 79 observers_[type][source.map_key()]; | 79 observers_[type][source.map_key()]; |
| 80 if (observer_list) { | 80 if (observer_list) { |
| 81 observer_list->RemoveObserver(observer); | 81 observer_list->RemoveObserver(observer); |
| 82 if (!observer_list->size()) { | 82 if (!observer_list->size()) { |
| 83 observers_[type].erase(source.map_key()); | 83 observers_[type].erase(source.map_key()); |
| 84 delete observer_list; | 84 delete observer_list; |
| 85 } | 85 } |
| 86 #ifndef NDEBUG | 86 #ifndef NDEBUG |
| 87 --observer_counts_[type]; | 87 --observer_counts_[type]; |
| 88 #endif | 88 #endif |
| 89 } | 89 } |
| 90 } | 90 } |
| 91 | 91 |
| 92 void NotificationServiceImpl::Notify(int type, | 92 void NotificationServiceImpl::Notify( |
| 93 const NotificationSource& source, | 93 int type, |
| 94 const NotificationDetails& details) { | 94 const content::NotificationSource& source, |
| 95 DCHECK(type > NOTIFICATION_ALL) << | 95 const content::NotificationDetails& details) { |
| 96 DCHECK(type > content::NOTIFICATION_ALL) << |
| 96 "Allowed for observing, but not posting."; | 97 "Allowed for observing, but not posting."; |
| 97 | 98 |
| 98 // There's no particular reason for the order in which the different | 99 // There's no particular reason for the order in which the different |
| 99 // classes of observers get notified here. | 100 // classes of observers get notified here. |
| 100 | 101 |
| 101 // Notify observers of all types and all sources | 102 // Notify observers of all types and all sources |
| 102 if (HasKey(observers_[NOTIFICATION_ALL], AllSources()) && | 103 if (HasKey(observers_[content::NOTIFICATION_ALL], AllSources()) && |
| 103 source != AllSources()) { | 104 source != AllSources()) { |
| 104 FOR_EACH_OBSERVER(NotificationObserver, | 105 FOR_EACH_OBSERVER(content::NotificationObserver, |
| 105 *observers_[NOTIFICATION_ALL][AllSources().map_key()], | 106 *observers_[content::NOTIFICATION_ALL][AllSources().map_key()], |
| 106 Observe(type, source, details)); | 107 Observe(type, source, details)); |
| 107 } | 108 } |
| 108 | 109 |
| 109 // Notify observers of all types and the given source | 110 // Notify observers of all types and the given source |
| 110 if (HasKey(observers_[NOTIFICATION_ALL], source)) { | 111 if (HasKey(observers_[content::NOTIFICATION_ALL], source)) { |
| 111 FOR_EACH_OBSERVER(NotificationObserver, | 112 FOR_EACH_OBSERVER(content::NotificationObserver, |
| 112 *observers_[NOTIFICATION_ALL][source.map_key()], | 113 *observers_[content::NOTIFICATION_ALL][source.map_key()], |
| 113 Observe(type, source, details)); | 114 Observe(type, source, details)); |
| 114 } | 115 } |
| 115 | 116 |
| 116 // Notify observers of the given type and all sources | 117 // Notify observers of the given type and all sources |
| 117 if (HasKey(observers_[type], AllSources()) && | 118 if (HasKey(observers_[type], AllSources()) && |
| 118 source != AllSources()) { | 119 source != AllSources()) { |
| 119 FOR_EACH_OBSERVER(NotificationObserver, | 120 FOR_EACH_OBSERVER(content::NotificationObserver, |
| 120 *observers_[type][AllSources().map_key()], | 121 *observers_[type][AllSources().map_key()], |
| 121 Observe(type, source, details)); | 122 Observe(type, source, details)); |
| 122 } | 123 } |
| 123 | 124 |
| 124 // Notify observers of the given type and the given source | 125 // Notify observers of the given type and the given source |
| 125 if (HasKey(observers_[type], source)) { | 126 if (HasKey(observers_[type], source)) { |
| 126 FOR_EACH_OBSERVER(NotificationObserver, | 127 FOR_EACH_OBSERVER(content::NotificationObserver, |
| 127 *observers_[type][source.map_key()], | 128 *observers_[type][source.map_key()], |
| 128 Observe(type, source, details)); | 129 Observe(type, source, details)); |
| 129 } | 130 } |
| 130 } | 131 } |
| 131 | 132 |
| 132 | 133 |
| 133 NotificationServiceImpl::~NotificationServiceImpl() { | 134 NotificationServiceImpl::~NotificationServiceImpl() { |
| 134 lazy_tls_ptr.Pointer()->Set(NULL); | 135 lazy_tls_ptr.Pointer()->Set(NULL); |
| 135 | 136 |
| 136 #ifndef NDEBUG | 137 #ifndef NDEBUG |
| 137 for (int i = 0; i < static_cast<int>(observer_counts_.size()); i++) { | 138 for (int i = 0; i < static_cast<int>(observer_counts_.size()); i++) { |
| 138 if (observer_counts_[i] > 0) { | 139 if (observer_counts_[i] > 0) { |
| 139 // This may not be completely fixable -- see | 140 // This may not be completely fixable -- see |
| 140 // http://code.google.com/p/chromium/issues/detail?id=11010 . | 141 // http://code.google.com/p/chromium/issues/detail?id=11010 . |
| 141 VLOG(1) << observer_counts_[i] << " notification observer(s) leaked " | 142 VLOG(1) << observer_counts_[i] << " notification observer(s) leaked " |
| 142 "of notification type " << i; | 143 "of notification type " << i; |
| 143 } | 144 } |
| 144 } | 145 } |
| 145 #endif | 146 #endif |
| 146 | 147 |
| 147 for (int i = 0; i < static_cast<int>(observers_.size()); i++) { | 148 for (int i = 0; i < static_cast<int>(observers_.size()); i++) { |
| 148 NotificationSourceMap omap = observers_[i]; | 149 NotificationSourceMap omap = observers_[i]; |
| 149 for (NotificationSourceMap::iterator it = omap.begin(); | 150 for (NotificationSourceMap::iterator it = omap.begin(); |
| 150 it != omap.end(); ++it) | 151 it != omap.end(); ++it) |
| 151 delete it->second; | 152 delete it->second; |
| 152 } | 153 } |
| 153 } | 154 } |
| 154 | |
| 155 } // namespace content | |
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