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1 // Copyright (c) 2011 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/browser/renderer_host/java_bridge_channel_host.h" | |
6 | |
7 #include "base/lazy_instance.h" | |
8 #include "base/stringprintf.h" | |
9 #include "base/synchronization/waitable_event.h" | |
10 | |
11 using base::WaitableEvent; | |
12 | |
13 namespace { | |
14 struct WaitableEventLazyInstanceTraits | |
15 : public base::DefaultLazyInstanceTraits<WaitableEvent> { | |
16 static WaitableEvent* New(void* instance) { | |
17 // Use placement new to initialize our instance in our preallocated space. | |
18 // The parenthesis is very important here to force POD type initialization. | |
19 return new (instance) WaitableEvent(false, false); | |
20 } | |
21 }; | |
22 base::LazyInstance<WaitableEvent, WaitableEventLazyInstanceTraits> dummy_event( | |
23 base::LINKER_INITIALIZED); | |
24 } | |
25 | |
26 JavaBridgeChannelHost* JavaBridgeChannelHost::GetJavaBridgeChannelHost( | |
27 int renderer_id, base::MessageLoopProxy* ipc_message_loop) { | |
28 std::string channel_name(StringPrintf("r%d.javabridge", renderer_id)); | |
29 // We don't use a shutdown event because the Java Bridge only sends messages | |
30 // from renderer to browser, so we'll never be waiting for a sync IPC to | |
31 // complete. So we use an event which is never signaled. | |
32 return static_cast<JavaBridgeChannelHost*>(NPChannelBase::GetChannel( | |
33 channel_name, | |
34 IPC::Channel::MODE_SERVER, | |
35 ClassFactory, | |
36 ipc_message_loop, | |
37 false, | |
38 dummy_event.Pointer())); | |
39 } | |
40 | |
41 int JavaBridgeChannelHost::GenerateRouteID() { | |
42 static int last_id = 0; | |
43 return ++last_id; | |
44 } | |
45 | |
46 bool JavaBridgeChannelHost::Init(base::MessageLoopProxy* ipc_message_loop, | |
47 bool create_pipe_now, | |
48 WaitableEvent* shutdown_event) { | |
49 if (!NPChannelBase::Init(ipc_message_loop, create_pipe_now, shutdown_event)) { | |
50 return false; | |
51 } | |
52 | |
53 // Finish populating our ChannelHandle. | |
54 #if defined(OS_POSIX) | |
55 // Leave the auto-close property at its default value. | |
56 channel_handle_.socket.fd = channel_->GetClientFileDescriptor(); | |
57 #endif | |
58 | |
59 return true; | |
60 } | |
61 | |
62 bool JavaBridgeChannelHost::Send(IPC::Message* msg) { | |
63 CHECK(!msg->is_sync() && msg->is_reply()) << | |
64 "Java Bridge only sends messages from renderer to browser."; | |
65 return NPChannelBase::Send(msg); | |
66 } | |
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