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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/renderer_host/java_bridge_channel_host.h"
#include "base/lazy_instance.h"
#include "base/stringprintf.h"
#include "base/synchronization/waitable_event.h"
using base::WaitableEvent;
namespace {
struct WaitableEventLazyInstanceTraits
: public base::DefaultLazyInstanceTraits<WaitableEvent> {
static WaitableEvent* New(void* instance) {
// Use placement new to initialize our instance in our preallocated space.
// The parenthesis is very important here to force POD type initialization.
return new (instance) WaitableEvent(false, false);
}
};
base::LazyInstance<WaitableEvent, WaitableEventLazyInstanceTraits> dummy_event(
base::LINKER_INITIALIZED);
}
JavaBridgeChannelHost* JavaBridgeChannelHost::GetJavaBridgeChannelHost(
int renderer_id, base::MessageLoopProxy* ipc_message_loop) {
std::string channel_name(StringPrintf("r%d.javabridge", renderer_id));
// We don't use a shutdown event because the Java Bridge only sends messages
// from renderer to browser, so we'll never be waiting for a sync IPC to
// complete. So we use an event which is never signaled.
return static_cast<JavaBridgeChannelHost*>(NPChannelBase::GetChannel(
channel_name,
IPC::Channel::MODE_SERVER,
ClassFactory,
ipc_message_loop,
false,
dummy_event.Pointer()));
}
int JavaBridgeChannelHost::GenerateRouteID() {
static int last_id = 0;
return ++last_id;
}
bool JavaBridgeChannelHost::Init(base::MessageLoopProxy* ipc_message_loop,
bool create_pipe_now,
WaitableEvent* shutdown_event) {
if (!NPChannelBase::Init(ipc_message_loop, create_pipe_now, shutdown_event)) {
return false;
}
// Finish populating our ChannelHandle.
#if defined(OS_POSIX)
// Leave the auto-close property at its default value.
channel_handle_.socket.fd = channel_->GetClientFileDescriptor();
#endif
return true;
}
bool JavaBridgeChannelHost::Send(IPC::Message* msg) {
CHECK(!msg->is_sync() && msg->is_reply()) <<
"Java Bridge only sends messages from renderer to browser.";
return NPChannelBase::Send(msg);
}
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