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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 MEDIA_BASE_MESSAGE_LOOP_FACTORY_H_ | |
6 #define MEDIA_BASE_MESSAGE_LOOP_FACTORY_H_ | |
7 | |
8 #include <list> | |
9 #include <string> | |
10 | |
11 #include "base/memory/ref_counted.h" | |
12 #include "base/memory/scoped_ptr.h" | |
13 #include "base/message_loop_proxy.h" | |
14 #include "base/synchronization/lock.h" | |
15 #include "media/base/media_export.h" | |
16 | |
17 class MessageLoop; | |
18 | |
19 namespace base { | |
20 class Thread; | |
21 } | |
22 | |
23 namespace media { | |
24 | |
25 // Factory object that manages named MessageLoops. | |
26 // | |
27 // TODO(scherkus): replace this with something simpler http://crbug.com/116873 | |
28 class MEDIA_EXPORT MessageLoopFactory { | |
29 public: | |
30 enum Type { | |
31 kPipeline | |
32 }; | |
33 | |
34 MessageLoopFactory(); | |
35 | |
36 // Get the message loop proxy associated with |type|. A new MessageLoopProxy | |
37 // is created if the factory doesn't have one associated with |type|. | |
38 scoped_refptr<base::MessageLoopProxy> GetMessageLoop(Type type); | |
39 | |
40 private: | |
41 // Restrict who can delete the factory to scoped_ptr<>. scoped_ptr<> uses | |
42 // base::DefaultDeleter. | |
43 friend struct base::DefaultDeleter<MessageLoopFactory>; | |
44 ~MessageLoopFactory(); | |
45 | |
46 // Returns the thread associated with |type| creating a new thread if needed. | |
47 base::Thread* GetThread(Type type); | |
48 | |
49 // Lock used to serialize access for the following data members. | |
50 base::Lock lock_; | |
51 | |
52 // List of pairs of created threads and their types. We use a list to ensure | |
53 // threads are stopped & deleted in reverse order of creation. | |
54 typedef std::list<std::pair<Type, base::Thread*> > ThreadList; | |
55 ThreadList threads_; | |
56 | |
57 DISALLOW_COPY_AND_ASSIGN(MessageLoopFactory); | |
58 }; | |
59 | |
60 } // namespace media | |
61 | |
62 #endif // MEDIA_BASE_MESSAGE_LOOP_FACTORY_H_ | |
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