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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 MOJO_SHELL_PUBLIC_CPP_APP_LIFETIME_HELPER_H_ | 5 #ifndef MOJO_SHELL_PUBLIC_CPP_APP_LIFETIME_HELPER_H_ |
6 #define MOJO_SHELL_PUBLIC_CPP_APP_LIFETIME_HELPER_H_ | 6 #define MOJO_SHELL_PUBLIC_CPP_APP_LIFETIME_HELPER_H_ |
7 | 7 |
8 #include "base/macros.h" | 8 #include "base/macros.h" |
9 #include "base/memory/scoped_ptr.h" | 9 #include "base/memory/scoped_ptr.h" |
10 #include "base/single_thread_task_runner.h" | 10 #include "base/single_thread_task_runner.h" |
11 | 11 |
12 namespace mojo { | 12 namespace mojo { |
13 | 13 |
14 class ApplicationImpl; | 14 class ShellConnection; |
15 class AppLifetimeHelper; | 15 class AppLifetimeHelper; |
16 | 16 |
17 // A service implementation should keep this object as a member variable to hold | 17 // A service implementation should keep this object as a member variable to hold |
18 // a reference on the application. | 18 // a reference on the application. |
19 // Since services can live on different threads than the app, this class is | 19 // Since services can live on different threads than the app, this class is |
20 // safe to use on any thread. However, each instance should only be used on one | 20 // safe to use on any thread. However, each instance should only be used on one |
21 // thread at a time (otherwise there'll be races between the addref resulting | 21 // thread at a time (otherwise there'll be races between the addref resulting |
22 // from cloning and destruction). | 22 // from cloning and destruction). |
23 class AppRefCount { | 23 class AppRefCount { |
24 public: | 24 public: |
(...skipping 22 matching lines...) Expand all Loading... |
47 | 47 |
48 DISALLOW_COPY_AND_ASSIGN(AppRefCount); | 48 DISALLOW_COPY_AND_ASSIGN(AppRefCount); |
49 }; | 49 }; |
50 | 50 |
51 // This is a helper class for apps to manage their lifetime, specifically so | 51 // This is a helper class for apps to manage their lifetime, specifically so |
52 // apps can quit when they're not used anymore. | 52 // apps can quit when they're not used anymore. |
53 // An app can contain an object of this class as a member variable. Each time it | 53 // An app can contain an object of this class as a member variable. Each time it |
54 // creates an instance of a service, it gives it a refcount using | 54 // creates an instance of a service, it gives it a refcount using |
55 // CreateAppRefCount. The service implementation then keeps that object as a | 55 // CreateAppRefCount. The service implementation then keeps that object as a |
56 // member variable. When all the service implemenations go away, the app will be | 56 // member variable. When all the service implemenations go away, the app will be |
57 // quit with a call to mojo::ApplicationImpl::Terminate(). | 57 // quit with a call to mojo::ShellConnection::Terminate(). |
58 class AppLifetimeHelper { | 58 class AppLifetimeHelper { |
59 public: | 59 public: |
60 explicit AppLifetimeHelper(ApplicationImpl* app); | 60 explicit AppLifetimeHelper(ShellConnection* app); |
61 ~AppLifetimeHelper(); | 61 ~AppLifetimeHelper(); |
62 | 62 |
63 scoped_ptr<AppRefCount> CreateAppRefCount(); | 63 scoped_ptr<AppRefCount> CreateAppRefCount(); |
64 | 64 |
65 private: | 65 private: |
66 friend AppRefCount; | 66 friend AppRefCount; |
67 void AddRef(); | 67 void AddRef(); |
68 void Release(); | 68 void Release(); |
69 | 69 |
70 friend ApplicationImpl; | 70 friend ShellConnection; |
71 void OnQuit(); | 71 void OnQuit(); |
72 | 72 |
73 ApplicationImpl* app_; | 73 ShellConnection* app_; |
74 int ref_count_; | 74 int ref_count_; |
75 | 75 |
76 DISALLOW_COPY_AND_ASSIGN(AppLifetimeHelper); | 76 DISALLOW_COPY_AND_ASSIGN(AppLifetimeHelper); |
77 }; | 77 }; |
78 | 78 |
79 } // namespace mojo | 79 } // namespace mojo |
80 | 80 |
81 #endif // MOJO_SHELL_PUBLIC_CPP_APP_LIFETIME_HELPER_H_ | 81 #endif // MOJO_SHELL_PUBLIC_CPP_APP_LIFETIME_HELPER_H_ |
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