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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. |
| (...skipping 34 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
| 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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