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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 | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef BASE_MESSAGE_LOOP_MESSAGE_LOOP_PROXY_IMPL_H_ | |
6 #define BASE_MESSAGE_LOOP_MESSAGE_LOOP_PROXY_IMPL_H_ | |
7 | |
8 #include "base/base_export.h" | |
9 #include "base/memory/ref_counted.h" | |
10 #include "base/message_loop/message_loop_proxy.h" | |
11 #include "base/pending_task.h" | |
12 #include "base/synchronization/lock.h" | |
13 #include "base/threading/platform_thread.h" | |
14 | |
15 namespace base { | |
16 namespace internal { | |
17 | |
18 class IncomingTaskQueue; | |
19 | |
20 // A stock implementation of MessageLoopProxy that is created and managed by a | |
21 // MessageLoop. For now a MessageLoopProxyImpl can only be created as part of a | |
22 // MessageLoop. | |
23 class BASE_EXPORT MessageLoopProxyImpl : public MessageLoopProxy { | |
24 public: | |
25 explicit MessageLoopProxyImpl( | |
26 scoped_refptr<IncomingTaskQueue> incoming_queue); | |
27 | |
28 // Initialize this message loop proxy on the current thread. | |
29 void BindToCurrentThread(); | |
30 | |
31 // MessageLoopProxy implementation | |
32 bool PostDelayedTask(const tracked_objects::Location& from_here, | |
33 const base::Closure& task, | |
34 base::TimeDelta delay) override; | |
35 bool PostNonNestableDelayedTask(const tracked_objects::Location& from_here, | |
36 const base::Closure& task, | |
37 base::TimeDelta delay) override; | |
38 bool RunsTasksOnCurrentThread() const override; | |
39 | |
40 private: | |
41 friend class RefCountedThreadSafe<MessageLoopProxyImpl>; | |
42 ~MessageLoopProxyImpl() override; | |
43 | |
44 // THe incoming queue receiving all posted tasks. | |
45 scoped_refptr<IncomingTaskQueue> incoming_queue_; | |
46 | |
47 // ID of the thread |this| was created on. Could be accessed on multiple | |
48 // threads, protected by |valid_thread_id_lock_|. | |
49 PlatformThreadId valid_thread_id_; | |
50 mutable Lock valid_thread_id_lock_; | |
51 | |
52 DISALLOW_COPY_AND_ASSIGN(MessageLoopProxyImpl); | |
53 }; | |
54 | |
55 } // namespace internal | |
56 } // namespace base | |
57 | |
58 #endif // BASE_MESSAGE_LOOP_MESSAGE_LOOP_PROXY_IMPL_H_ | |
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