OLD | NEW |
1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 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 CrossThreadHolder_h | 5 #ifndef CrossThreadHolder_h |
6 #define CrossThreadHolder_h | 6 #define CrossThreadHolder_h |
7 | 7 |
8 #include "core/dom/ActiveDOMObject.h" | 8 #include "core/dom/ActiveDOMObject.h" |
9 #include "core/dom/CrossThreadTask.h" | 9 #include "core/dom/CrossThreadTask.h" |
10 #include "core/dom/ExecutionContext.h" | 10 #include "core/dom/ExecutionContext.h" |
(...skipping 47 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
58 | 58 |
59 ~CrossThreadHolder() | 59 ~CrossThreadHolder() |
60 { | 60 { |
61 MutexLocker locker(m_mutex->mutex()); | 61 MutexLocker locker(m_mutex->mutex()); |
62 clearInternal(); | 62 clearInternal(); |
63 } | 63 } |
64 | 64 |
65 private: | 65 private: |
66 // Object graph: | 66 // Object graph: |
67 // +------+ +-----------------+ | 67 // +------+ +-----------------+ |
68 // T <-OwnPtr- |Bridge| ---------RawPtr--------> |CrossThreadHolder| | 68 // T <-OwnPtr- |Bridge| ---------*-------------> |CrossThreadHolder| |
69 // | | <-CrossThreadPersistent- | | | 69 // | | <-CrossThreadPersistent- | | |
70 // +------+ +-----------------+ | 70 // +------+ +-----------------+ |
71 // | | | 71 // | | |
72 // +--RefPtr--> MutexWrapper <--RefPtr--+ | 72 // +--RefPtr--> MutexWrapper <--RefPtr--+ |
73 // The CrossThreadPersistent/RawPtr between CrossThreadHolder and Bridge | 73 // The CrossThreadPersistent<T>/T* between CrossThreadHolder and Bridge |
74 // are protected by MutexWrapper | 74 // are protected by MutexWrapper |
75 // and cleared when CrossThreadHolder::clearInternal() is called, i.e.: | 75 // and cleared when CrossThreadHolder::clearInternal() is called, i.e.: |
76 // [1] when |executionContext| is stopped, or | 76 // [1] when |executionContext| is stopped, or |
77 // [2] when CrossThreadHolder is destructed. | 77 // [2] when CrossThreadHolder is destructed. |
78 // Then Bridge is shortly garbage collected and T is destructed. | 78 // Then Bridge is shortly garbage collected and T is destructed. |
79 | 79 |
80 class MutexWrapper : public ThreadSafeRefCounted<MutexWrapper> { | 80 class MutexWrapper : public ThreadSafeRefCounted<MutexWrapper> { |
81 public: | 81 public: |
82 static PassRefPtr<MutexWrapper> create() { return adoptRef(new MutexWrap
per()); } | 82 static PassRefPtr<MutexWrapper> create() { return adoptRef(new MutexWrap
per()); } |
83 Mutex& mutex() { return m_mutex; } | 83 Mutex& mutex() { return m_mutex; } |
(...skipping 84 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
168 RefPtr<MutexWrapper> m_mutex; | 168 RefPtr<MutexWrapper> m_mutex; |
169 // |m_bridge| is protected by |m_mutex|. | 169 // |m_bridge| is protected by |m_mutex|. |
170 // |m_bridge| is cleared before the thread that allocated |*m_bridge| | 170 // |m_bridge| is cleared before the thread that allocated |*m_bridge| |
171 // is stopped. | 171 // is stopped. |
172 CrossThreadPersistent<Bridge> m_bridge; | 172 CrossThreadPersistent<Bridge> m_bridge; |
173 }; | 173 }; |
174 | 174 |
175 } // namespace blink | 175 } // namespace blink |
176 | 176 |
177 #endif // CrossThreadHolder_h | 177 #endif // CrossThreadHolder_h |
OLD | NEW |