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1 // Copyright 2014 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 #include <set> | |
6 #include <utility> | |
7 | |
8 #include "base/bind.h" | |
9 #include "base/callback.h" | |
10 #include "base/macros.h" | |
11 #include "base/memory/weak_ptr.h" | |
12 #include "base/single_thread_task_runner.h" | |
13 #include "base/thread_task_runner_handle.h" | |
14 #include "base/threading/platform_thread.h" | |
15 #include "mojo/application/public/cpp/application_connection.h" | |
16 #include "mojo/application/public/cpp/application_delegate.h" | |
17 #include "mojo/application/public/cpp/application_impl.h" | |
18 #include "mojo/application/public/cpp/application_runner.h" | |
19 #include "mojo/application/public/cpp/content_handler_factory.h" | |
20 #include "mojo/application/public/cpp/interface_factory_impl.h" | |
21 #include "mojo/message_pump/message_pump_mojo.h" | |
22 #include "mojo/public/cpp/bindings/strong_binding.h" | |
23 | |
24 namespace mojo { | |
25 | |
26 namespace { | |
27 | |
28 class ApplicationThread : public base::PlatformThread::Delegate { | |
29 public: | |
30 ApplicationThread( | |
31 scoped_refptr<base::SingleThreadTaskRunner> handler_thread, | |
32 const base::Callback<void(ApplicationThread*)>& termination_callback, | |
33 ContentHandlerFactory::Delegate* handler_delegate, | |
34 InterfaceRequest<Application> application_request, | |
35 URLResponsePtr response, | |
36 const Callback<void()>& destruct_callback) | |
37 : handler_thread_(handler_thread), | |
38 termination_callback_(termination_callback), | |
39 handler_delegate_(handler_delegate), | |
40 application_request_(std::move(application_request)), | |
41 response_(std::move(response)), | |
42 destruct_callback_(destruct_callback) {} | |
43 | |
44 ~ApplicationThread() override { | |
45 destruct_callback_.Run(); | |
46 } | |
47 | |
48 private: | |
49 void ThreadMain() override { | |
50 handler_delegate_->RunApplication(std::move(application_request_), | |
51 std::move(response_)); | |
52 handler_thread_->PostTask(FROM_HERE, | |
53 base::Bind(termination_callback_, this)); | |
54 } | |
55 | |
56 scoped_refptr<base::SingleThreadTaskRunner> handler_thread_; | |
57 base::Callback<void(ApplicationThread*)> termination_callback_; | |
58 ContentHandlerFactory::Delegate* handler_delegate_; | |
59 InterfaceRequest<Application> application_request_; | |
60 URLResponsePtr response_; | |
61 Callback<void()> destruct_callback_; | |
62 | |
63 DISALLOW_COPY_AND_ASSIGN(ApplicationThread); | |
64 }; | |
65 | |
66 class ContentHandlerImpl : public ContentHandler { | |
67 public: | |
68 ContentHandlerImpl(ContentHandlerFactory::Delegate* delegate, | |
69 InterfaceRequest<ContentHandler> request) | |
70 : delegate_(delegate), | |
71 binding_(this, std::move(request)), | |
72 weak_factory_(this) {} | |
73 ~ContentHandlerImpl() override { | |
74 // We're shutting down and doing cleanup. Cleanup may trigger calls back to | |
75 // OnThreadEnd(). As we're doing the cleanup here we don't want to do it in | |
76 // OnThreadEnd() as well. InvalidateWeakPtrs() ensures we don't get any | |
77 // calls to OnThreadEnd(). | |
78 weak_factory_.InvalidateWeakPtrs(); | |
79 for (auto thread : active_threads_) { | |
80 base::PlatformThread::Join(thread.second); | |
81 delete thread.first; | |
82 } | |
83 } | |
84 | |
85 private: | |
86 // Overridden from ContentHandler: | |
87 void StartApplication( | |
88 InterfaceRequest<Application> application_request, | |
89 URLResponsePtr response, | |
90 const Callback<void()>& destruct_callback) override { | |
91 ApplicationThread* thread = | |
92 new ApplicationThread(base::ThreadTaskRunnerHandle::Get(), | |
93 base::Bind(&ContentHandlerImpl::OnThreadEnd, | |
94 weak_factory_.GetWeakPtr()), | |
95 delegate_, std::move(application_request), | |
96 std::move(response), destruct_callback); | |
97 base::PlatformThreadHandle handle; | |
98 bool launched = base::PlatformThread::Create(0, thread, &handle); | |
99 DCHECK(launched); | |
100 active_threads_[thread] = handle; | |
101 } | |
102 | |
103 void OnThreadEnd(ApplicationThread* thread) { | |
104 DCHECK(active_threads_.find(thread) != active_threads_.end()); | |
105 base::PlatformThreadHandle handle = active_threads_[thread]; | |
106 active_threads_.erase(thread); | |
107 base::PlatformThread::Join(handle); | |
108 delete thread; | |
109 } | |
110 | |
111 ContentHandlerFactory::Delegate* delegate_; | |
112 std::map<ApplicationThread*, base::PlatformThreadHandle> active_threads_; | |
113 StrongBinding<ContentHandler> binding_; | |
114 base::WeakPtrFactory<ContentHandlerImpl> weak_factory_; | |
115 | |
116 DISALLOW_COPY_AND_ASSIGN(ContentHandlerImpl); | |
117 }; | |
118 | |
119 } // namespace | |
120 | |
121 ContentHandlerFactory::ContentHandlerFactory(Delegate* delegate) | |
122 : delegate_(delegate) { | |
123 } | |
124 | |
125 ContentHandlerFactory::~ContentHandlerFactory() { | |
126 } | |
127 | |
128 void ContentHandlerFactory::ManagedDelegate::RunApplication( | |
129 InterfaceRequest<Application> application_request, | |
130 URLResponsePtr response) { | |
131 base::MessageLoop loop(common::MessagePumpMojo::Create()); | |
132 auto application = this->CreateApplication(std::move(application_request), | |
133 std::move(response)); | |
134 if (application) | |
135 loop.Run(); | |
136 } | |
137 | |
138 void ContentHandlerFactory::Create(ApplicationConnection* connection, | |
139 InterfaceRequest<ContentHandler> request) { | |
140 new ContentHandlerImpl(delegate_, std::move(request)); | |
141 } | |
142 | |
143 } // namespace mojo | |
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