ipc/chromium/src/chrome/common/notification_service.cc@6474c204b198 (annotated)
ipc/chromium/src/chrome/common/notification_service.cc
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. |
| michael@0 | 2 | // Use of this source code is governed by a BSD-style license that can be |
| michael@0 | 3 | // found in the LICENSE file. |
| michael@0 | 4 | |
| michael@0 | 5 | #include "chrome/common/notification_service.h" |
| michael@0 | 6 | |
| michael@0 | 7 | #include "base/lazy_instance.h" |
| michael@0 | 8 | #include "base/thread_local.h" |
| michael@0 | 9 | |
| michael@0 | 10 | static base::LazyInstance<base::ThreadLocalPointer<NotificationService> > |
| michael@0 | 11 | lazy_tls_ptr(base::LINKER_INITIALIZED); |
| michael@0 | 12 | |
| michael@0 | 13 | // static |
| michael@0 | 14 | NotificationService* NotificationService::current() { |
| michael@0 | 15 | return lazy_tls_ptr.Pointer()->Get(); |
| michael@0 | 16 | } |
| michael@0 | 17 | |
| michael@0 | 18 | // static |
| michael@0 | 19 | bool NotificationService::HasKey(const NotificationSourceMap& map, |
| michael@0 | 20 | const NotificationSource& source) { |
| michael@0 | 21 | return map.find(source.map_key()) != map.end(); |
| michael@0 | 22 | } |
| michael@0 | 23 | |
| michael@0 | 24 | NotificationService::NotificationService() { |
| michael@0 | 25 | DCHECK(current() == NULL); |
| michael@0 | 26 | #ifndef NDEBUG |
| michael@0 | 27 | memset(observer_counts_, 0, sizeof(observer_counts_)); |
| michael@0 | 28 | #endif |
| michael@0 | 29 | |
| michael@0 | 30 | lazy_tls_ptr.Pointer()->Set(this); |
| michael@0 | 31 | } |
| michael@0 | 32 | |
| michael@0 | 33 | void NotificationService::AddObserver(NotificationObserver* observer, |
| michael@0 | 34 | NotificationType type, |
| michael@0 | 35 | const NotificationSource& source) { |
| michael@0 | 36 | DCHECK(type.value < NotificationType::NOTIFICATION_TYPE_COUNT); |
| michael@0 | 37 | |
| michael@0 | 38 | // We have gotten some crashes where the observer pointer is NULL. The problem |
| michael@0 | 39 | // is that this happens when we actually execute a notification, so have no |
| michael@0 | 40 | // way of knowing who the bad observer was. We want to know when this happens |
| michael@0 | 41 | // in release mode so we know what code to blame the crash on (since this is |
| michael@0 | 42 | // guaranteed to crash later). |
| michael@0 | 43 | CHECK(observer); |
| michael@0 | 44 | |
| michael@0 | 45 | NotificationObserverList* observer_list; |
| michael@0 | 46 | if (HasKey(observers_[type.value], source)) { |
| michael@0 | 47 | observer_list = observers_[type.value][source.map_key()]; |
| michael@0 | 48 | } else { |
| michael@0 | 49 | observer_list = new NotificationObserverList; |
| michael@0 | 50 | observers_[type.value][source.map_key()] = observer_list; |
| michael@0 | 51 | } |
| michael@0 | 52 | |
| michael@0 | 53 | observer_list->AddObserver(observer); |
| michael@0 | 54 | #ifndef NDEBUG |
| michael@0 | 55 | ++observer_counts_[type.value]; |
| michael@0 | 56 | #endif |
| michael@0 | 57 | } |
| michael@0 | 58 | |
| michael@0 | 59 | void NotificationService::RemoveObserver(NotificationObserver* observer, |
| michael@0 | 60 | NotificationType type, |
| michael@0 | 61 | const NotificationSource& source) { |
| michael@0 | 62 | DCHECK(type.value < NotificationType::NOTIFICATION_TYPE_COUNT); |
| michael@0 | 63 | DCHECK(HasKey(observers_[type.value], source)); |
| michael@0 | 64 | |
| michael@0 | 65 | NotificationObserverList* observer_list = |
| michael@0 | 66 | observers_[type.value][source.map_key()]; |
| michael@0 | 67 | if (observer_list) { |
| michael@0 | 68 | observer_list->RemoveObserver(observer); |
| michael@0 | 69 | #ifndef NDEBUG |
| michael@0 | 70 | --observer_counts_[type.value]; |
| michael@0 | 71 | #endif |
| michael@0 | 72 | } |
| michael@0 | 73 | |
| michael@0 | 74 | // TODO(jhughes): Remove observer list from map if empty? |
| michael@0 | 75 | } |
| michael@0 | 76 | |
| michael@0 | 77 | void NotificationService::Notify(NotificationType type, |
| michael@0 | 78 | const NotificationSource& source, |
| michael@0 | 79 | const NotificationDetails& details) { |
| michael@0 | 80 | DCHECK(type.value > NotificationType::ALL) << |
| michael@0 | 81 | "Allowed for observing, but not posting."; |
| michael@0 | 82 | DCHECK(type.value < NotificationType::NOTIFICATION_TYPE_COUNT); |
| michael@0 | 83 | |
| michael@0 | 84 | // There's no particular reason for the order in which the different |
| michael@0 | 85 | // classes of observers get notified here. |
| michael@0 | 86 | |
| michael@0 | 87 | // Notify observers of all types and all sources |
| michael@0 | 88 | if (HasKey(observers_[NotificationType::ALL], AllSources()) && |
| michael@0 | 89 | source != AllSources()) { |
| michael@0 | 90 | FOR_EACH_OBSERVER(NotificationObserver, |
| michael@0 | 91 | *observers_[NotificationType::ALL][AllSources().map_key()], |
| michael@0 | 92 | Observe(type, source, details)); |
| michael@0 | 93 | } |
| michael@0 | 94 | |
| michael@0 | 95 | // Notify observers of all types and the given source |
| michael@0 | 96 | if (HasKey(observers_[NotificationType::ALL], source)) { |
| michael@0 | 97 | FOR_EACH_OBSERVER(NotificationObserver, |
| michael@0 | 98 | *observers_[NotificationType::ALL][source.map_key()], |
| michael@0 | 99 | Observe(type, source, details)); |
| michael@0 | 100 | } |
| michael@0 | 101 | |
| michael@0 | 102 | // Notify observers of the given type and all sources |
| michael@0 | 103 | if (HasKey(observers_[type.value], AllSources()) && |
| michael@0 | 104 | source != AllSources()) { |
| michael@0 | 105 | FOR_EACH_OBSERVER(NotificationObserver, |
| michael@0 | 106 | *observers_[type.value][AllSources().map_key()], |
| michael@0 | 107 | Observe(type, source, details)); |
| michael@0 | 108 | } |
| michael@0 | 109 | |
| michael@0 | 110 | // Notify observers of the given type and the given source |
| michael@0 | 111 | if (HasKey(observers_[type.value], source)) { |
| michael@0 | 112 | FOR_EACH_OBSERVER(NotificationObserver, |
| michael@0 | 113 | *observers_[type.value][source.map_key()], |
| michael@0 | 114 | Observe(type, source, details)); |
| michael@0 | 115 | } |
| michael@0 | 116 | } |
| michael@0 | 117 | |
| michael@0 | 118 | |
| michael@0 | 119 | NotificationService::~NotificationService() { |
| michael@0 | 120 | lazy_tls_ptr.Pointer()->Set(NULL); |
| michael@0 | 121 | |
| michael@0 | 122 | #ifndef NDEBUG |
| michael@0 | 123 | for (int i = 0; i < NotificationType::NOTIFICATION_TYPE_COUNT; i++) { |
| michael@0 | 124 | if (observer_counts_[i] > 0) { |
| michael@0 | 125 | // This may not be completely fixable -- see |
| michael@0 | 126 | // http://code.google.com/p/chromium/issues/detail?id=11010 . |
| michael@0 | 127 | // But any new leaks should be fixed. |
| michael@0 | 128 | CHROMIUM_LOG(WARNING) << observer_counts_[i] << " notification observer(s) leaked" |
| michael@0 | 129 | << " of notification type " << i; |
| michael@0 | 130 | } |
| michael@0 | 131 | } |
| michael@0 | 132 | #endif |
| michael@0 | 133 | |
| michael@0 | 134 | for (int i = 0; i < NotificationType::NOTIFICATION_TYPE_COUNT; i++) { |
| michael@0 | 135 | NotificationSourceMap omap = observers_[i]; |
| michael@0 | 136 | for (NotificationSourceMap::iterator it = omap.begin(); |
| michael@0 | 137 | it != omap.end(); ++it) { |
| michael@0 | 138 | delete it->second; |
| michael@0 | 139 | } |
| michael@0 | 140 | } |
| michael@0 | 141 | } |
| michael@0 | 142 | |
| michael@0 | 143 | NotificationObserver::~NotificationObserver() {} |
