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// Copyright (c) 2012 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.
#ifndef CONTENT_COMMON_GPU_GPU_CHANNEL_MANAGER_H_
#define CONTENT_COMMON_GPU_GPU_CHANNEL_MANAGER_H_
#pragma once
#include "base/hash_tables.h"
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
#include "base/message_loop_proxy.h"
#include "build/build_config.h"
#include "ipc/ipc_channel.h"
#include "ipc/ipc_message.h"
#include "ui/gfx/native_widget_types.h"
namespace base {
class WaitableEvent;
}
namespace IPC {
struct ChannelHandle;
}
class ChildThread;
class GpuChannel;
class GpuWatchdog;
struct GPUCreateCommandBufferConfig;
// A GpuChannelManager is a thread responsible for issuing rendering commands
// managing the lifetimes of GPU channels and forwarding IPC requests from the
// browser process to them based on the corresponding renderer ID.
//
// A GpuChannelManager can also be hosted in the browser process in single
// process or in-process GPU modes. In this case there is no corresponding
// GpuChildThread and this is the reason the GpuChildThread is referenced via
// a pointer to IPC::Message::Sender, which can be implemented by other hosts
// to send IPC messages to the browser process IO thread on the
// GpuChannelManager's behalf.
class GpuChannelManager : public IPC::Channel::Listener,
public IPC::Message::Sender {
public:
GpuChannelManager(ChildThread* gpu_child_thread,
GpuWatchdog* watchdog,
base::MessageLoopProxy* io_message_loop,
base::WaitableEvent* shutdown_event);
virtual ~GpuChannelManager();
// Remove the channel for a particular renderer.
void RemoveChannel(int client_id);
// Listener overrides.
virtual bool OnMessageReceived(const IPC::Message& msg) OVERRIDE;
// Sender overrides.
virtual bool Send(IPC::Message* msg) OVERRIDE;
void LoseAllContexts();
base::WeakPtrFactory<GpuChannelManager> weak_factory_;
int GenerateRouteID();
void AddRoute(int32 routing_id, IPC::Channel::Listener* listener);
void RemoveRoute(int32 routing_id);
GpuChannel* LookupChannel(int32 client_id);
private:
// Message handlers.
void OnEstablishChannel(int client_id, int share_client_id);
void OnCloseChannel(const IPC::ChannelHandle& channel_handle);
void OnVisibilityChanged(
int32 render_view_id, int32 client_id, bool visible);
void OnCreateViewCommandBuffer(
gfx::PluginWindowHandle window,
int32 render_view_id,
int32 client_id,
const GPUCreateCommandBufferConfig& init_params);
void OnLoseAllContexts();
scoped_refptr<base::MessageLoopProxy> io_message_loop_;
base::WaitableEvent* shutdown_event_;
// Used to send and receive IPC messages from the browser process.
ChildThread* gpu_child_thread_;
// These objects manage channels to individual renderer processes there is
// one channel for each renderer process that has connected to this GPU
// process.
typedef base::hash_map<int, scoped_refptr<GpuChannel> > GpuChannelMap;
GpuChannelMap gpu_channels_;
GpuWatchdog* watchdog_;
DISALLOW_COPY_AND_ASSIGN(GpuChannelManager);
};
#endif // CONTENT_COMMON_GPU_GPU_CHANNEL_MANAGER_H_
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