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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/gpu/gpu_channel.h"
#include "base/command_line.h"
#include "base/lock.h"
#include "base/process_util.h"
#include "base/string_util.h"
#include "base/waitable_event.h"
#include "build/build_config.h"
#include "chrome/common/child_process.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/gpu_messages.h"
#include "chrome/gpu/gpu_thread.h"
#if defined(OS_POSIX)
#include "ipc/ipc_channel_posix.h"
#endif
namespace {
class GpuReleaseTask : public Task {
public:
void Run() {
ChildProcess::current()->ReleaseProcess();
}
};
typedef base::hash_map<std::string, scoped_refptr<GpuChannel> >
GpuChannelMap;
// How long we wait before releasing the GPU process.
const int kGpuReleaseTimeMS = 10000;
GpuChannelMap g_gpu_channels;
} // namespace anonymous
GpuChannel* GpuChannel::EstablishGpuChannel(int renderer_id) {
// Map renderer ID to a (single) channel to that process.
std::string channel_name = StringPrintf(
"%d.r%d", base::GetCurrentProcId(), renderer_id);
scoped_refptr<GpuChannel> channel;
GpuChannelMap::const_iterator iter = g_gpu_channels.find(channel_name);
if (iter == g_gpu_channels.end()) {
channel = new GpuChannel;
} else {
channel = iter->second;
}
DCHECK(channel != NULL);
if (!channel->channel_.get()) {
if (channel->Init(channel_name)) {
g_gpu_channels[channel_name] = channel;
} else {
channel = NULL;
}
}
return channel.get();
}
GpuChannel::GpuChannel()
: renderer_id_(-1)
#if defined(OS_POSIX)
, renderer_fd_(-1)
#endif
{
ChildProcess::current()->AddRefProcess();
const CommandLine* command_line = CommandLine::ForCurrentProcess();
log_messages_ = command_line->HasSwitch(switches::kLogPluginMessages);
}
GpuChannel::~GpuChannel() {
#if defined(OS_POSIX)
// If we still have the renderer FD, close it.
if (renderer_fd_ != -1) {
close(renderer_fd_);
}
#endif
ChildProcess::current()->io_message_loop()->PostDelayedTask(
FROM_HERE,
new GpuReleaseTask(),
kGpuReleaseTimeMS);
}
void GpuChannel::OnChannelConnected(int32 peer_pid) {
if (!renderer_process_.Open(peer_pid)) {
NOTREACHED();
}
}
void GpuChannel::OnMessageReceived(const IPC::Message& message) {
if (log_messages_) {
LOG(INFO) << "received message @" << &message << " on channel @" << this
<< " with type " << message.type();
}
if (message.routing_id() == MSG_ROUTING_CONTROL) {
OnControlMessageReceived(message);
} else {
// The sender should know not to route messages to an object after it
// has been destroyed.
CHECK(router_.RouteMessage(message));
}
}
void GpuChannel::OnChannelError() {
// Destroy channel. This will cause the channel to be recreated if another
// attempt is made to establish a connection from the corresponding renderer.
channel_.reset();
// Close renderer process handle.
renderer_process_.Close();
#if defined(ENABLE_GPU)
// Destroy all the stubs on this channel.
for (size_t i = 0; i < stubs_.size(); ++i) {
router_.RemoveRoute(stubs_[i]->route_id());
}
stubs_.clear();
#endif
}
bool GpuChannel::Send(IPC::Message* message) {
if (log_messages_) {
LOG(INFO) << "sending message @" << message << " on channel @" << this
<< " with type " << message->type();
}
if (!channel_.get()) {
delete message;
return false;
}
return channel_->Send(message);
}
void GpuChannel::OnControlMessageReceived(const IPC::Message& msg) {
IPC_BEGIN_MESSAGE_MAP(GpuChannel, msg)
IPC_MESSAGE_HANDLER(GpuChannelMsg_CreateCommandBuffer,
OnCreateCommandBuffer)
IPC_MESSAGE_HANDLER(GpuChannelMsg_DestroyCommandBuffer,
OnDestroyCommandBuffer)
IPC_MESSAGE_UNHANDLED_ERROR()
IPC_END_MESSAGE_MAP()
}
int GpuChannel::GenerateRouteID() {
static int last_id = 0;
return ++last_id;
}
void GpuChannel::OnCreateCommandBuffer(int* route_id) {
#if defined(ENABLE_GPU)
*route_id = GenerateRouteID();
scoped_refptr<GpuCommandBufferStub> stub = new GpuCommandBufferStub(
this, *route_id);
router_.AddRoute(*route_id, stub);
stubs_[*route_id] = stub;
#else
*route_id = 0;
#endif
}
void GpuChannel::OnDestroyCommandBuffer(int route_id) {
#if defined(ENABLE_GPU)
StubMap::iterator it = stubs_.find(route_id);
DCHECK(it != stubs_.end());
stubs_.erase(it);
router_.RemoveRoute(route_id);
#endif
}
bool GpuChannel::Init(const std::string& channel_name) {
channel_name_ = channel_name;
channel_.reset(new IPC::SyncChannel(
channel_name, IPC::Channel::MODE_SERVER, this, NULL,
ChildProcess::current()->io_message_loop(), false,
ChildProcess::current()->GetShutDownEvent()));
return true;
}
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