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// Copyright (c) 2010 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 "chrome/browser/gpu_process_host.h"
#include "base/command_line.h"
#include "base/thread.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/chrome_thread.h"
#include "chrome/browser/gpu_process_host_ui_shim.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/gpu_messages.h"
#include "chrome/common/render_messages.h"
#include "ipc/ipc_switches.h"
namespace {
// Tasks used by this file
class RouteOnUIThreadTask : public Task {
public:
explicit RouteOnUIThreadTask(const IPC::Message& msg) {
msg_ = new IPC::Message(msg);
}
private:
void Run() {
GpuProcessHostUIShim::Get()->OnMessageReceived(*msg_);
delete msg_;
msg_ = NULL;
}
IPC::Message* msg_;
};
// Global GpuProcessHost instance.
// We can not use Singleton<GpuProcessHost> because that gets
// terminated on the wrong thread (main thread). We need the
// GpuProcessHost to be terminated on the same thread on which it is
// initialized, the IO thread.
static GpuProcessHost* sole_instance_ = NULL;
} // anonymous namespace
GpuProcessHost::GpuProcessHost()
: ChildProcessHost(GPU_PROCESS, NULL),
initialized_(false),
initialized_successfully_(false) {
DCHECK_EQ(sole_instance_, static_cast<GpuProcessHost*>(NULL));
}
GpuProcessHost::~GpuProcessHost() {
while (!queued_synchronization_replies_.empty()) {
delete queued_synchronization_replies_.front().reply;
queued_synchronization_replies_.pop();
}
DCHECK_EQ(sole_instance_, this);
sole_instance_ = NULL;
}
bool GpuProcessHost::EnsureInitialized() {
if (!initialized_) {
initialized_ = true;
initialized_successfully_ = Init();
}
return initialized_successfully_;
}
bool GpuProcessHost::Init() {
if (!CreateChannel())
return false;
const CommandLine& browser_command_line = *CommandLine::ForCurrentProcess();
std::wstring gpu_launcher =
browser_command_line.GetSwitchValue(switches::kGpuLauncher);
FilePath exe_path = ChildProcessHost::GetChildPath(gpu_launcher.empty());
if (exe_path.empty())
return false;
CommandLine* cmd_line = new CommandLine(exe_path);
cmd_line->AppendSwitchWithValue(switches::kProcessType,
switches::kGpuProcess);
cmd_line->AppendSwitchWithValue(switches::kProcessChannelID,
ASCIIToWide(channel_id()));
const CommandLine& browser_cmd_line = *CommandLine::ForCurrentProcess();
PropagateBrowserCommandLineToGpu(browser_cmd_line, cmd_line);
// If specified, prepend a launcher program to the command line.
if (!gpu_launcher.empty())
cmd_line->PrependWrapper(gpu_launcher);
Launch(
#if defined(OS_WIN)
FilePath(),
#elif defined(OS_POSIX)
false, // Never use the zygote (GPU plugin can't be sandboxed).
base::environment_vector(),
#endif
cmd_line);
return true;
}
// static
GpuProcessHost* GpuProcessHost::Get() {
if (sole_instance_ == NULL)
sole_instance_ = new GpuProcessHost();
return sole_instance_;
}
bool GpuProcessHost::Send(IPC::Message* msg) {
if (!EnsureInitialized())
return false;
return ChildProcessHost::Send(msg);
}
void GpuProcessHost::OnMessageReceived(const IPC::Message& message) {
if (message.routing_id() == MSG_ROUTING_CONTROL) {
OnControlMessageReceived(message);
} else {
// Need to transfer this message to the UI thread and the
// GpuProcessHostUIShim for dispatching via its message router.
ChromeThread::PostTask(ChromeThread::UI,
FROM_HERE,
new RouteOnUIThreadTask(message));
}
}
void GpuProcessHost::EstablishGpuChannel(int renderer_id,
ResourceMessageFilter* filter) {
if (Send(new GpuMsg_EstablishChannel(renderer_id))) {
sent_requests_.push(ChannelRequest(filter));
} else {
ReplyToRenderer(IPC::ChannelHandle(), filter);
}
}
void GpuProcessHost::Synchronize(IPC::Message* reply,
ResourceMessageFilter* filter) {
queued_synchronization_replies_.push(SynchronizationRequest(reply, filter));
Send(new GpuMsg_Synchronize());
}
void GpuProcessHost::OnControlMessageReceived(const IPC::Message& message) {
IPC_BEGIN_MESSAGE_MAP(GpuProcessHost, message)
IPC_MESSAGE_HANDLER(GpuHostMsg_ChannelEstablished, OnChannelEstablished)
IPC_MESSAGE_HANDLER(GpuHostMsg_SynchronizeReply, OnSynchronizeReply)
IPC_MESSAGE_UNHANDLED_ERROR()
IPC_END_MESSAGE_MAP()
}
void GpuProcessHost::OnChannelEstablished(
const IPC::ChannelHandle& channel_handle) {
const ChannelRequest& request = sent_requests_.front();
ReplyToRenderer(channel_handle, request.filter);
sent_requests_.pop();
}
void GpuProcessHost::OnSynchronizeReply() {
const SynchronizationRequest& request =
queued_synchronization_replies_.front();
request.filter->Send(request.reply);
queued_synchronization_replies_.pop();
}
void GpuProcessHost::ReplyToRenderer(
const IPC::ChannelHandle& channel,
ResourceMessageFilter* filter) {
ViewMsg_GpuChannelEstablished* message =
new ViewMsg_GpuChannelEstablished(channel);
// If the renderer process is performing synchronous initialization,
// it needs to handle this message before receiving the reply for
// the synchronous ViewHostMsg_SynchronizeGpu message.
message->set_unblock(true);
filter->Send(message);
}
void GpuProcessHost::PropagateBrowserCommandLineToGpu(
const CommandLine& browser_cmd,
CommandLine* gpu_cmd) const {
// Propagate the following switches to the GPU process command line (along
// with any associated values) if present in the browser command line.
static const char* const switch_names[] = {
switches::kDisableLogging,
switches::kEnableLogging,
switches::kGpuStartupDialog,
switches::kLoggingLevel,
};
for (size_t i = 0; i < arraysize(switch_names); ++i) {
if (browser_cmd.HasSwitch(switch_names[i])) {
gpu_cmd->AppendSwitchWithValue(switch_names[i],
browser_cmd.GetSwitchValueASCII(switch_names[i]));
}
}
}
URLRequestContext* GpuProcessHost::GetRequestContext(
uint32 request_id,
const ViewHostMsg_Resource_Request& request_data) {
return NULL;
}
bool GpuProcessHost::CanShutdown() {
return true;
}
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