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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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