Revert of Refactor content/common/gpu into gpu/ipc/service

gpu/ipc/service/gpu_channel.h

Index: gpu/ipc/service/gpu_channel.h
diff --git a/gpu/ipc/service/gpu_channel.h b/gpu/ipc/service/gpu_channel.h
deleted file mode 100644
index d1e9347ef24e4c5f2b76759cc8386518f68b869d..0000000000000000000000000000000000000000
--- a/gpu/ipc/service/gpu_channel.h
+++ /dev/null
@@ -1,482 +0,0 @@
-// 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 GPU_IPC_SERVICE_GPU_CHANNEL_H_
-#define GPU_IPC_SERVICE_GPU_CHANNEL_H_
-
-#include <stddef.h>
-#include <stdint.h>
-
-#include <string>
-
-#include "base/containers/hash_tables.h"
-#include "base/containers/scoped_ptr_hash_map.h"
-#include "base/macros.h"
-#include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/memory/weak_ptr.h"
-#include "base/process/process.h"
-#include "base/threading/thread_checker.h"
-#include "base/trace_event/memory_dump_provider.h"
-#include "build/build_config.h"
-#include "gpu/command_buffer/service/valuebuffer_manager.h"
-#include "gpu/gpu_export.h"
-#include "gpu/ipc/common/gpu_stream_constants.h"
-#include "gpu/ipc/service/gpu_command_buffer_stub.h"
-#include "gpu/ipc/service/gpu_memory_manager.h"
-#include "ipc/ipc_sync_channel.h"
-#include "ipc/message_router.h"
-#include "ui/gfx/geometry/size.h"
-#include "ui/gfx/native_widget_types.h"
-#include "ui/gl/gl_share_group.h"
-#include "ui/gl/gpu_preference.h"
-
-struct GPUCreateCommandBufferConfig;
-
-namespace base {
-class WaitableEvent;
-}
-
-namespace IPC {
-class MessageFilter;
-}
-
-namespace gpu {
-
-class PreemptionFlag;
-class SyncPointOrderData;
-class SyncPointManager;
-union ValueState;
-class ValueStateMap;
-class GpuChannelManager;
-class GpuChannelMessageFilter;
-class GpuChannelMessageQueue;
-class GpuWatchdog;
-
-namespace gles2 {
-class SubscriptionRefSet;
-}
-
-// Encapsulates an IPC channel between the GPU process and one renderer
-// process. On the renderer side there's a corresponding GpuChannelHost.
-class GPU_EXPORT GpuChannel
-    : public IPC::Listener,
-      public IPC::Sender,
-      public gles2::SubscriptionRefSet::Observer {
- public:
-  // Takes ownership of the renderer process handle.
-  GpuChannel(GpuChannelManager* gpu_channel_manager,
-             SyncPointManager* sync_point_manager,
-             GpuWatchdog* watchdog,
-             gfx::GLShareGroup* share_group,
-             gles2::MailboxManager* mailbox_manager,
-             PreemptionFlag* preempting_flag,
-             PreemptionFlag* preempted_flag,
-             base::SingleThreadTaskRunner* task_runner,
-             base::SingleThreadTaskRunner* io_task_runner,
-             int32_t client_id,
-             uint64_t client_tracing_id,
-             bool allow_view_command_buffers,
-             bool allow_real_time_streams);
-  ~GpuChannel() override;
-
-  // Initializes the IPC channel. Caller takes ownership of the client FD in
-  // the returned handle and is responsible for closing it.
-  virtual IPC::ChannelHandle Init(base::WaitableEvent* shutdown_event);
-
-  void SetUnhandledMessageListener(IPC::Listener* listener);
-
-  // Get the GpuChannelManager that owns this channel.
-  GpuChannelManager* gpu_channel_manager() const {
-    return gpu_channel_manager_;
-  }
-
-  const std::string& channel_id() const { return channel_id_; }
-
-  virtual base::ProcessId GetClientPID() const;
-
-  int client_id() const { return client_id_; }
-
-  uint64_t client_tracing_id() const { return client_tracing_id_; }
-
-  base::WeakPtr<GpuChannel> AsWeakPtr();
-
-  scoped_refptr<base::SingleThreadTaskRunner> io_task_runner() const {
-    return io_task_runner_;
-  }
-
-  // IPC::Listener implementation:
-  bool OnMessageReceived(const IPC::Message& msg) override;
-  void OnChannelError() override;
-
-  // IPC::Sender implementation:
-  bool Send(IPC::Message* msg) override;
-
-  // SubscriptionRefSet::Observer implementation
-  void OnAddSubscription(unsigned int target) override;
-  void OnRemoveSubscription(unsigned int target) override;
-
-  void OnStreamRescheduled(int32_t stream_id, bool scheduled);
-
-  gfx::GLShareGroup* share_group() const { return share_group_.get(); }
-
-  GpuCommandBufferStub* LookupCommandBuffer(int32_t route_id);
-
-  void LoseAllContexts();
-  void MarkAllContextsLost();
-
-  // Called to add a listener for a particular message routing ID.
-  // Returns true if succeeded.
-  bool AddRoute(int32_t route_id, int32_t stream_id, IPC::Listener* listener);
-
-  // Called to remove a listener for a particular message routing ID.
-  void RemoveRoute(int32_t route_id);
-
-  void CacheShader(const std::string& key, const std::string& shader);
-
-  void AddFilter(IPC::MessageFilter* filter);
-  void RemoveFilter(IPC::MessageFilter* filter);
-
-  uint64_t GetMemoryUsage();
-
-  scoped_refptr<gl::GLImage> CreateImageForGpuMemoryBuffer(
-      const gfx::GpuMemoryBufferHandle& handle,
-      const gfx::Size& size,
-      gfx::BufferFormat format,
-      uint32_t internalformat);
-
-  void HandleUpdateValueState(unsigned int target,
-                              const ValueState& state);
-
-  GpuChannelMessageFilter* filter() const { return filter_.get(); }
-
-  // Visible for testing.
-  const ValueStateMap* pending_valuebuffer_state() const {
-    return pending_valuebuffer_state_.get();
-  }
-
-  // Returns the global order number for the last processed IPC message.
-  uint32_t GetProcessedOrderNum() const;
-
-  // Returns the global order number for the last unprocessed IPC message.
-  uint32_t GetUnprocessedOrderNum() const;
-
-  // Returns the shared sync point global order data for the stream.
-  scoped_refptr<SyncPointOrderData> GetSyncPointOrderData(
-      int32_t stream_id);
-
-  void PostHandleOutOfOrderMessage(const IPC::Message& message);
-  void PostHandleMessage(const scoped_refptr<GpuChannelMessageQueue>& queue);
-
-  // Synchronously handle the message to make testing convenient.
-  void HandleMessageForTesting(const IPC::Message& msg);
-
-#if defined(OS_ANDROID)
-  const GpuCommandBufferStub* GetOneStub() const;
-#endif
-
- protected:
-  // The message filter on the io thread.
-  scoped_refptr<GpuChannelMessageFilter> filter_;
-
-  // Map of routing id to command buffer stub.
-  base::ScopedPtrHashMap<int32_t, scoped_ptr<GpuCommandBufferStub>> stubs_;
-
- private:
-  bool OnControlMessageReceived(const IPC::Message& msg);
-
-  void HandleMessage(const scoped_refptr<GpuChannelMessageQueue>& queue);
-
-  // Some messages such as WaitForGetOffsetInRange and WaitForTokenInRange are
-  // processed as soon as possible because the client is blocked until they
-  // are completed.
-  void HandleOutOfOrderMessage(const IPC::Message& msg);
-
-  void HandleMessageHelper(const IPC::Message& msg);
-
-  scoped_refptr<GpuChannelMessageQueue> CreateStream(
-      int32_t stream_id,
-      GpuStreamPriority stream_priority);
-
-  scoped_refptr<GpuChannelMessageQueue> LookupStream(int32_t stream_id);
-
-  void DestroyStreamIfNecessary(
-      const scoped_refptr<GpuChannelMessageQueue>& queue);
-
-  void AddRouteToStream(int32_t route_id, int32_t stream_id);
-  void RemoveRouteFromStream(int32_t route_id);
-
-  // Message handlers for control messages.
-  void OnCreateCommandBuffer(SurfaceHandle surface_handle,
-                             const gfx::Size& size,
-                             const GPUCreateCommandBufferConfig& init_params,
-                             int32_t route_id,
-                             bool* succeeded);
-  void OnDestroyCommandBuffer(int32_t route_id);
-
-
-  // The lifetime of objects of this class is managed by a GpuChannelManager.
-  // The GpuChannelManager destroy all the GpuChannels that they own when they
-  // are destroyed. So a raw pointer is safe.
-  GpuChannelManager* const gpu_channel_manager_;
-
-  // Sync point manager. Outlives the channel and is guaranteed to outlive the
-  // message loop.
-  SyncPointManager* const sync_point_manager_;
-
-  scoped_ptr<IPC::SyncChannel> channel_;
-
-  IPC::Listener* unhandled_message_listener_;
-
-  // Uniquely identifies the channel within this GPU process.
-  std::string channel_id_;
-
-  // Used to implement message routing functionality to CommandBuffer objects
-  IPC::MessageRouter router_;
-
-  // Whether the processing of IPCs on this channel is stalled and we should
-  // preempt other GpuChannels.
-  scoped_refptr<PreemptionFlag> preempting_flag_;
-
-  // If non-NULL, all stubs on this channel should stop processing GL
-  // commands (via their CommandExecutor) when preempted_flag_->IsSet()
-  scoped_refptr<PreemptionFlag> preempted_flag_;
-
-  // The id of the client who is on the other side of the channel.
-  const int32_t client_id_;
-
-  // The tracing ID used for memory allocations associated with this client.
-  const uint64_t client_tracing_id_;
-
-  // The task runners for the main thread and the io thread.
-  scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
-  scoped_refptr<base::SingleThreadTaskRunner> io_task_runner_;
-
-  // The share group that all contexts associated with a particular renderer
-  // process use.
-  scoped_refptr<gfx::GLShareGroup> share_group_;
-
-  scoped_refptr<gles2::MailboxManager> mailbox_manager_;
-
-  scoped_refptr<gles2::SubscriptionRefSet> subscription_ref_set_;
-
-  scoped_refptr<ValueStateMap> pending_valuebuffer_state_;
-
-  gles2::DisallowedFeatures disallowed_features_;
-  GpuWatchdog* const watchdog_;
-
-  // Map of stream id to appropriate message queue.
-  base::hash_map<int32_t, scoped_refptr<GpuChannelMessageQueue>> streams_;
-
-  // Multimap of stream id to route ids.
-  base::hash_map<int32_t, int> streams_to_num_routes_;
-
-  // Map of route id to stream id;
-  base::hash_map<int32_t, int32_t> routes_to_streams_;
-
-  // Can view command buffers be created on this channel.
-  const bool allow_view_command_buffers_;
-
-  // Can real time streams be created on this channel.
-  const bool allow_real_time_streams_;
-
-  // Member variables should appear before the WeakPtrFactory, to ensure
-  // that any WeakPtrs to Controller are invalidated before its members
-  // variable's destructors are executed, rendering them invalid.
-  base::WeakPtrFactory<GpuChannel> weak_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(GpuChannel);
-};
-
-// This filter does three things:
-// - it counts and timestamps each message forwarded to the channel
-//   so that we can preempt other channels if a message takes too long to
-//   process. To guarantee fairness, we must wait a minimum amount of time
-//   before preempting and we limit the amount of time that we can preempt in
-//   one shot (see constants above).
-// - it handles the GpuCommandBufferMsg_InsertSyncPoint message on the IO
-//   thread, generating the sync point ID and responding immediately, and then
-//   posting a task to insert the GpuCommandBufferMsg_RetireSyncPoint message
-//   into the channel's queue.
-// - it generates mailbox names for clients of the GPU process on the IO thread.
-class GPU_EXPORT GpuChannelMessageFilter : public IPC::MessageFilter {
- public:
-  GpuChannelMessageFilter();
-
-  // IPC::MessageFilter implementation.
-  void OnFilterAdded(IPC::Sender* sender) override;
-  void OnFilterRemoved() override;
-  void OnChannelConnected(int32_t peer_pid) override;
-  void OnChannelError() override;
-  void OnChannelClosing() override;
-  bool OnMessageReceived(const IPC::Message& message) override;
-
-  void AddChannelFilter(scoped_refptr<IPC::MessageFilter> filter);
-  void RemoveChannelFilter(scoped_refptr<IPC::MessageFilter> filter);
-
-  void AddRoute(int32_t route_id,
-                const scoped_refptr<GpuChannelMessageQueue>& queue);
-  void RemoveRoute(int32_t route_id);
-
-  bool Send(IPC::Message* message);
-
- protected:
-  ~GpuChannelMessageFilter() override;
-
- private:
-  scoped_refptr<GpuChannelMessageQueue> LookupStreamByRoute(int32_t route_id);
-
-  bool MessageErrorHandler(const IPC::Message& message, const char* error_msg);
-
-  // Map of route id to message queue.
-  base::hash_map<int32_t, scoped_refptr<GpuChannelMessageQueue>> routes_;
-  base::Lock routes_lock_;  // Protects |routes_|.
-
-  IPC::Sender* sender_;
-  base::ProcessId peer_pid_;
-  std::vector<scoped_refptr<IPC::MessageFilter>> channel_filters_;
-
-  DISALLOW_COPY_AND_ASSIGN(GpuChannelMessageFilter);
-};
-
-struct GpuChannelMessage {
-  IPC::Message message;
-  uint32_t order_number;
-  base::TimeTicks time_received;
-
-  GpuChannelMessage(const IPC::Message& msg,
-                    uint32_t order_num,
-                    base::TimeTicks ts)
-      : message(msg), order_number(order_num), time_received(ts) {}
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(GpuChannelMessage);
-};
-
-class GpuChannelMessageQueue
-    : public base::RefCountedThreadSafe<GpuChannelMessageQueue> {
- public:
-  static scoped_refptr<GpuChannelMessageQueue> Create(
-      int32_t stream_id,
-      GpuStreamPriority stream_priority,
-      GpuChannel* channel,
-      const scoped_refptr<base::SingleThreadTaskRunner>& io_task_runner,
-      const scoped_refptr<PreemptionFlag>& preempting_flag,
-      const scoped_refptr<PreemptionFlag>& preempted_flag,
-      SyncPointManager* sync_point_manager);
-
-  void Disable();
-  void DisableIO();
-
-  int32_t stream_id() const { return stream_id_; }
-  GpuStreamPriority stream_priority() const { return stream_priority_; }
-
-  bool IsScheduled() const;
-  void OnRescheduled(bool scheduled);
-
-  bool HasQueuedMessages() const;
-
-  base::TimeTicks GetNextMessageTimeTick() const;
-
-  scoped_refptr<SyncPointOrderData> GetSyncPointOrderData();
-
-  // Returns the global order number for the last unprocessed IPC message.
-  uint32_t GetUnprocessedOrderNum() const;
-
-  // Returns the global order number for the last unprocessed IPC message.
-  uint32_t GetProcessedOrderNum() const;
-
-  // Should be called before a message begins to be processed. Returns false if
-  // there are no messages to process.
-  const GpuChannelMessage* BeginMessageProcessing();
-  // Should be called if a message began processing but did not finish.
-  void PauseMessageProcessing();
-  // Should be called if a message is completely processed. Returns true if
-  // there are more messages to process.
-  void FinishMessageProcessing();
-
-  bool PushBackMessage(const IPC::Message& message);
-
- private:
-  enum PreemptionState {
-    // Either there's no other channel to preempt, there are no messages
-    // pending processing, or we just finished preempting and have to wait
-    // before preempting again.
-    IDLE,
-    // We are waiting kPreemptWaitTimeMs before checking if we should preempt.
-    WAITING,
-    // We can preempt whenever any IPC processing takes more than
-    // kPreemptWaitTimeMs.
-    CHECKING,
-    // We are currently preempting (i.e. no stub is descheduled).
-    PREEMPTING,
-    // We would like to preempt, but some stub is descheduled.
-    WOULD_PREEMPT_DESCHEDULED,
-  };
-
-  friend class base::RefCountedThreadSafe<GpuChannelMessageQueue>;
-
-  GpuChannelMessageQueue(
-      int32_t stream_id,
-      GpuStreamPriority stream_priority,
-      GpuChannel* channel,
-      const scoped_refptr<base::SingleThreadTaskRunner>& io_task_runner,
-      const scoped_refptr<PreemptionFlag>& preempting_flag,
-      const scoped_refptr<PreemptionFlag>& preempted_flag,
-      SyncPointManager* sync_point_manager);
-  ~GpuChannelMessageQueue();
-
-  void UpdatePreemptionState();
-  void UpdatePreemptionStateHelper();
-
-  void UpdateStateIdle();
-  void UpdateStateWaiting();
-  void UpdateStateChecking();
-  void UpdateStatePreempting();
-  void UpdateStateWouldPreemptDescheduled();
-
-  void TransitionToIdle();
-  void TransitionToWaiting();
-  void TransitionToChecking();
-  void TransitionToPreempting();
-  void TransitionToWouldPreemptDescheduled();
-
-  bool ShouldTransitionToIdle() const;
-
-  const int32_t stream_id_;
-  const GpuStreamPriority stream_priority_;
-
-  // These can be accessed from both IO and main threads and are protected by
-  // |channel_lock_|.
-  bool enabled_;
-  bool scheduled_;
-  GpuChannel* const channel_;
-  std::deque<scoped_ptr<GpuChannelMessage>> channel_messages_;
-  mutable base::Lock channel_lock_;
-
-  // The following are accessed on the IO thread only.
-  // No lock is necessary for preemption state because it's only accessed on the
-  // IO thread.
-  PreemptionState preemption_state_;
-  // Maximum amount of time that we can spend in PREEMPTING.
-  // It is reset when we transition to IDLE.
-  base::TimeDelta max_preemption_time_;
-  // This timer is used and runs tasks on the IO thread.
-  scoped_ptr<base::OneShotTimer> timer_;
-  base::ThreadChecker io_thread_checker_;
-
-  // Keeps track of sync point related state such as message order numbers.
-  scoped_refptr<SyncPointOrderData> sync_point_order_data_;
-
-  scoped_refptr<base::SingleThreadTaskRunner> io_task_runner_;
-  scoped_refptr<PreemptionFlag> preempting_flag_;
-  scoped_refptr<PreemptionFlag> preempted_flag_;
-  SyncPointManager* const sync_point_manager_;
-
-  DISALLOW_COPY_AND_ASSIGN(GpuChannelMessageQueue);
-};
-
-}  // namespace gpu
-
-#endif  // GPU_IPC_SERVICE_GPU_CHANNEL_H_