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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 CHROME_BROWSER_PROCESS_RESOURCE_USAGE_H_ | 5 #ifndef CHROME_BROWSER_PROCESS_RESOURCE_USAGE_H_ |
6 #define CHROME_BROWSER_PROCESS_RESOURCE_USAGE_H_ | 6 #define CHROME_BROWSER_PROCESS_RESOURCE_USAGE_H_ |
7 | 7 |
8 #include <stddef.h> | 8 #include <stddef.h> |
9 | 9 |
10 #include <deque> | 10 #include <deque> |
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21 // service that exposes | 21 // service that exposes |
22 // information about resources used by a child process. Currently, this is only | 22 // information about resources used by a child process. Currently, this is only |
23 // V8 memory and Blink resource cache usage, but could be expanded to include | 23 // V8 memory and Blink resource cache usage, but could be expanded to include |
24 // other resources. This is intended for status viewers such as the task | 24 // other resources. This is intended for status viewers such as the task |
25 // manager. | 25 // manager. |
26 // | 26 // |
27 // To create: | 27 // To create: |
28 // 1. Create a chrome::mojom::ResourceUsageReporterPtr and obtain an | 28 // 1. Create a chrome::mojom::ResourceUsageReporterPtr and obtain an |
29 // InterfaceRequest<> | 29 // InterfaceRequest<> |
30 // using | 30 // using |
31 // mojo::GetProxy. | 31 // mojo::MakeRequest. |
32 // 2. Use the child process's service registry to connect to the service using | 32 // 2. Use the child process's service registry to connect to the service using |
33 // the InterfaceRequest<>. Note, ServiceRegistry is thread hostile and | 33 // the InterfaceRequest<>. Note, ServiceRegistry is thread hostile and |
34 // must always be accessed from the same thread. However, InterfaceRequest<> | 34 // must always be accessed from the same thread. However, InterfaceRequest<> |
35 // can be passed safely between threads, and therefore a task can be posted | 35 // can be passed safely between threads, and therefore a task can be posted |
36 // to the ServiceRegistry thread to connect to the remote service. | 36 // to the ServiceRegistry thread to connect to the remote service. |
37 // 3. Pass the chrome::mojom::ResourceUsageReporterPtr to the constructor. | 37 // 3. Pass the chrome::mojom::ResourceUsageReporterPtr to the constructor. |
38 // | 38 // |
39 // Example: | 39 // Example: |
40 // void Foo::ConnectToService( | 40 // void Foo::ConnectToService( |
41 // mojo::InterfaceRequest<chrome::mojom::ResourceUsageReporter> req) { | 41 // mojo::InterfaceRequest<chrome::mojom::ResourceUsageReporter> req) { |
42 // content::ServiceRegistry* registry = host_->GetServiceRegistry(); | 42 // content::ServiceRegistry* registry = host_->GetServiceRegistry(); |
43 // registry->ConnectToRemoteService(std::move(req)); | 43 // registry->ConnectToRemoteService(std::move(req)); |
44 // } | 44 // } |
45 // | 45 // |
46 // ... | 46 // ... |
47 // chrome::mojom::ResourceUsageReporterPtr service; | 47 // chrome::mojom::ResourceUsageReporterPtr service; |
48 // mojo::InterfaceRequest<chrome::mojom::ResourceUsageReporter> request = | 48 // mojo::InterfaceRequest<chrome::mojom::ResourceUsageReporter> request = |
49 // mojo::GetProxy(&service); | 49 // mojo::MakeRequest(&service); |
50 // content::BrowserThread::PostTask( | 50 // content::BrowserThread::PostTask( |
51 // content::BrowserThread::IO, FROM_HERE, | 51 // content::BrowserThread::IO, FROM_HERE, |
52 // base::Bind(&Foo::ConnectToService, this, base::Passed(&request))); | 52 // base::Bind(&Foo::ConnectToService, this, base::Passed(&request))); |
53 // resource_usage_.reset(new ProcessResourceUsage(std::move(service))); | 53 // resource_usage_.reset(new ProcessResourceUsage(std::move(service))); |
54 // ... | 54 // ... |
55 // | 55 // |
56 // Note: ProcessResourceUsage is thread-hostile and must live on a single | 56 // Note: ProcessResourceUsage is thread-hostile and must live on a single |
57 // thread. | 57 // thread. |
58 class ProcessResourceUsage { | 58 class ProcessResourceUsage { |
59 public: | 59 public: |
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85 std::deque<base::Closure> refresh_callbacks_; | 85 std::deque<base::Closure> refresh_callbacks_; |
86 | 86 |
87 chrome::mojom::ResourceUsageDataPtr stats_; | 87 chrome::mojom::ResourceUsageDataPtr stats_; |
88 | 88 |
89 base::ThreadChecker thread_checker_; | 89 base::ThreadChecker thread_checker_; |
90 | 90 |
91 DISALLOW_COPY_AND_ASSIGN(ProcessResourceUsage); | 91 DISALLOW_COPY_AND_ASSIGN(ProcessResourceUsage); |
92 }; | 92 }; |
93 | 93 |
94 #endif // CHROME_BROWSER_PROCESS_RESOURCE_USAGE_H_ | 94 #endif // CHROME_BROWSER_PROCESS_RESOURCE_USAGE_H_ |
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