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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 #ifndef WEBKIT_BROWSER_FILEAPI_TASK_RUNNER_BOUND_OBSERVER_LIST_H_ | 5 #ifndef WEBKIT_BROWSER_FILEAPI_TASK_RUNNER_BOUND_OBSERVER_LIST_H_ |
6 #define WEBKIT_BROWSER_FILEAPI_TASK_RUNNER_BOUND_OBSERVER_LIST_H_ | 6 #define WEBKIT_BROWSER_FILEAPI_TASK_RUNNER_BOUND_OBSERVER_LIST_H_ |
7 | 7 |
8 #include <map> | 8 #include <map> |
9 | 9 |
10 #include "base/basictypes.h" | 10 #include "base/basictypes.h" |
11 #include "base/bind.h" | 11 #include "base/bind.h" |
12 #include "base/memory/ref_counted.h" | 12 #include "base/memory/ref_counted.h" |
13 #include "base/sequenced_task_runner.h" | 13 #include "base/sequenced_task_runner.h" |
14 #include "base/threading/thread.h" | 14 #include "base/threading/thread.h" |
15 | 15 |
16 namespace fileapi { | 16 namespace storage { |
17 | 17 |
18 // A wrapper for dispatching method. | 18 // A wrapper for dispatching method. |
19 template <class T, class Method, class Params> | 19 template <class T, class Method, class Params> |
20 void NotifyWrapper(T obj, Method m, const Params& p) { | 20 void NotifyWrapper(T obj, Method m, const Params& p) { |
21 DispatchToMethod(base::internal::UnwrapTraits<T>::Unwrap(obj), m, p); | 21 DispatchToMethod(base::internal::UnwrapTraits<T>::Unwrap(obj), m, p); |
22 } | 22 } |
23 | 23 |
24 // An observer list helper to notify on a given task runner. | 24 // An observer list helper to notify on a given task runner. |
25 // Observer pointers (stored as ObserverStoreType) must be kept alive | 25 // Observer pointers (stored as ObserverStoreType) must be kept alive |
26 // until this list dispatches all the notifications. | 26 // until this list dispatches all the notifications. |
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61 } | 61 } |
62 | 62 |
63 // Notify on the task runner that is given to AddObserver. | 63 // Notify on the task runner that is given to AddObserver. |
64 // If we're already on the runner this just dispatches the method. | 64 // If we're already on the runner this just dispatches the method. |
65 template <class Method, class Params> | 65 template <class Method, class Params> |
66 void Notify(Method method, const Params& params) const { | 66 void Notify(Method method, const Params& params) const { |
67 COMPILE_ASSERT( | 67 COMPILE_ASSERT( |
68 (base::internal::ParamsUseScopedRefptrCorrectly<Params>::value), | 68 (base::internal::ParamsUseScopedRefptrCorrectly<Params>::value), |
69 badunboundmethodparams); | 69 badunboundmethodparams); |
70 for (typename ObserversListMap::const_iterator it = observers_.begin(); | 70 for (typename ObserversListMap::const_iterator it = observers_.begin(); |
71 it != observers_.end(); ++it) { | 71 it != observers_.end(); |
| 72 ++it) { |
72 if (!it->second.get() || it->second->RunsTasksOnCurrentThread()) { | 73 if (!it->second.get() || it->second->RunsTasksOnCurrentThread()) { |
73 DispatchToMethod(UnwrapTraits::Unwrap(it->first), method, params); | 74 DispatchToMethod(UnwrapTraits::Unwrap(it->first), method, params); |
74 continue; | 75 continue; |
75 } | 76 } |
76 it->second->PostTask( | 77 it->second->PostTask( |
77 FROM_HERE, | 78 FROM_HERE, |
78 base::Bind(&NotifyWrapper<ObserverStoreType, Method, Params>, | 79 base::Bind(&NotifyWrapper<ObserverStoreType, Method, Params>, |
79 it->first, method, params)); | 80 it->first, |
| 81 method, |
| 82 params)); |
80 } | 83 } |
81 } | 84 } |
82 | 85 |
83 private: | 86 private: |
84 typedef base::internal::UnwrapTraits<ObserverStoreType> UnwrapTraits; | 87 typedef base::internal::UnwrapTraits<ObserverStoreType> UnwrapTraits; |
85 | 88 |
86 ObserversListMap observers_; | 89 ObserversListMap observers_; |
87 }; | 90 }; |
88 | 91 |
89 class FileAccessObserver; | 92 class FileAccessObserver; |
90 class FileChangeObserver; | 93 class FileChangeObserver; |
91 class FileUpdateObserver; | 94 class FileUpdateObserver; |
92 | 95 |
93 typedef TaskRunnerBoundObserverList<FileAccessObserver> AccessObserverList; | 96 typedef TaskRunnerBoundObserverList<FileAccessObserver> AccessObserverList; |
94 typedef TaskRunnerBoundObserverList<FileChangeObserver> ChangeObserverList; | 97 typedef TaskRunnerBoundObserverList<FileChangeObserver> ChangeObserverList; |
95 typedef TaskRunnerBoundObserverList<FileUpdateObserver> UpdateObserverList; | 98 typedef TaskRunnerBoundObserverList<FileUpdateObserver> UpdateObserverList; |
96 | 99 |
97 } // namespace fileapi | 100 } // namespace storage |
98 | 101 |
99 #endif // WEBKIT_BROWSER_FILEAPI_TASK_RUNNER_BOUND_OBSERVER_LIST_H_ | 102 #endif // WEBKIT_BROWSER_FILEAPI_TASK_RUNNER_BOUND_OBSERVER_LIST_H_ |
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