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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 | |
3 // found in the LICENSE file. | |
4 | |
5 #include "content/common/mojo/mojo_child_connection.h" | |
6 | |
7 #include <stdint.h> | |
8 #include <utility> | |
9 | |
10 #include "base/macros.h" | |
11 #include "content/public/common/mojo_shell_connection.h" | |
12 #include "mojo/edk/embedder/embedder.h" | |
13 #include "mojo/public/cpp/system/message_pipe.h" | |
14 #include "services/shell/public/cpp/connector.h" | |
15 #include "services/shell/public/cpp/identity.h" | |
16 #include "services/shell/public/cpp/interface_registry.h" | |
17 #include "services/shell/public/interfaces/service.mojom.h" | |
18 | |
19 namespace content { | |
20 | |
21 namespace { | |
22 | |
23 void CallBinderOnTaskRunner( | |
24 const shell::InterfaceRegistry::Binder& binder, | |
25 scoped_refptr<base::SequencedTaskRunner> task_runner, | |
26 const std::string& interface_name, | |
27 mojo::ScopedMessagePipeHandle request_handle) { | |
28 task_runner->PostTask( | |
29 FROM_HERE, | |
30 base::Bind(binder, interface_name, base::Passed(&request_handle))); | |
31 } | |
32 | |
33 } // namespace | |
34 | |
35 class MojoChildConnection::IOThreadContext | |
36 : public base::RefCountedThreadSafe<IOThreadContext> { | |
37 public: | |
38 IOThreadContext() {} | |
39 | |
40 void Initialize(const shell::Identity& child_identity, | |
41 shell::Connector* connector, | |
42 mojo::ScopedMessagePipeHandle service_pipe, | |
43 scoped_refptr<base::SequencedTaskRunner> io_task_runner) { | |
44 DCHECK(!io_task_runner_); | |
45 io_task_runner_ = io_task_runner; | |
46 std::unique_ptr<shell::Connector> io_thread_connector; | |
47 if (connector) | |
48 io_thread_connector = connector->Clone(); | |
49 io_task_runner_->PostTask( | |
50 FROM_HERE, | |
51 base::Bind(&IOThreadContext::InitializeOnIOThread, this, | |
52 child_identity, | |
53 base::Passed(&io_thread_connector), | |
54 base::Passed(&service_pipe))); | |
55 } | |
56 | |
57 void ShutDown() { | |
58 if (!io_task_runner_) | |
59 return; | |
60 bool posted = io_task_runner_->PostTask( | |
61 FROM_HERE, | |
62 base::Bind(&IOThreadContext::ShutDownOnIOThread, this)); | |
63 DCHECK(posted); | |
64 } | |
65 | |
66 void GetRemoteInterfaceOnIOThread( | |
67 const std::string& interface_name, | |
68 mojo::ScopedMessagePipeHandle request_handle) { | |
69 if (connection_) { | |
70 connection_->GetRemoteInterfaces()->GetInterface( | |
71 interface_name, std::move(request_handle)); | |
72 } | |
73 } | |
74 | |
75 void SetProcessHandle(base::ProcessHandle handle) { | |
76 DCHECK(io_task_runner_); | |
77 io_task_runner_->PostTask( | |
78 FROM_HERE, | |
79 base::Bind(&IOThreadContext::SetProcessHandleOnIOThread, this, handle)); | |
80 } | |
81 | |
82 private: | |
83 friend class base::RefCountedThreadSafe<IOThreadContext>; | |
84 | |
85 virtual ~IOThreadContext() {} | |
86 | |
87 void InitializeOnIOThread( | |
88 const shell::Identity& child_identity, | |
89 std::unique_ptr<shell::Connector> connector, | |
90 mojo::ScopedMessagePipeHandle service_pipe) { | |
91 shell::mojom::ServicePtr service; | |
92 service.Bind(mojo::InterfacePtrInfo<shell::mojom::Service>( | |
93 std::move(service_pipe), 0u)); | |
94 shell::mojom::PIDReceiverRequest pid_receiver_request = | |
95 mojo::GetProxy(&pid_receiver_); | |
96 | |
97 shell::Connector::ConnectParams params(child_identity); | |
98 params.set_client_process_connection(std::move(service), | |
99 std::move(pid_receiver_request)); | |
100 | |
101 // In some unit testing scenarios a null connector is passed. | |
102 if (connector) | |
103 connection_ = connector->Connect(¶ms); | |
104 } | |
105 | |
106 void ShutDownOnIOThread() { | |
107 connection_.reset(); | |
108 pid_receiver_.reset(); | |
109 } | |
110 | |
111 void SetProcessHandleOnIOThread(base::ProcessHandle handle) { | |
112 DCHECK(pid_receiver_.is_bound()); | |
113 pid_receiver_->SetPID(base::GetProcId(handle)); | |
114 pid_receiver_.reset(); | |
115 } | |
116 | |
117 scoped_refptr<base::SequencedTaskRunner> io_task_runner_; | |
118 std::unique_ptr<shell::Connection> connection_; | |
119 shell::mojom::PIDReceiverPtr pid_receiver_; | |
120 | |
121 DISALLOW_COPY_AND_ASSIGN(IOThreadContext); | |
122 }; | |
123 | |
124 MojoChildConnection::MojoChildConnection( | |
125 const std::string& service_name, | |
126 const std::string& instance_id, | |
127 const std::string& child_token, | |
128 shell::Connector* connector, | |
129 scoped_refptr<base::SequencedTaskRunner> io_task_runner) | |
130 : context_(new IOThreadContext), | |
131 child_identity_(service_name, shell::mojom::kInheritUserID, instance_id), | |
132 service_token_(mojo::edk::GenerateRandomToken()), | |
133 weak_factory_(this) { | |
134 mojo::ScopedMessagePipeHandle service_pipe = | |
135 mojo::edk::CreateParentMessagePipe(service_token_, child_token); | |
136 | |
137 context_->Initialize(child_identity_, connector, std::move(service_pipe), | |
138 io_task_runner); | |
139 remote_interfaces_.Forward( | |
140 base::Bind(&CallBinderOnTaskRunner, | |
141 base::Bind(&IOThreadContext::GetRemoteInterfaceOnIOThread, | |
142 context_), io_task_runner)); | |
143 } | |
144 | |
145 MojoChildConnection::~MojoChildConnection() { | |
146 context_->ShutDown(); | |
147 } | |
148 | |
149 void MojoChildConnection::SetProcessHandle(base::ProcessHandle handle) { | |
150 context_->SetProcessHandle(handle); | |
151 } | |
152 | |
153 } // namespace content | |
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