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

content/common/gpu/gpu_channel.h

Index: content/common/gpu/gpu_channel.h
diff --git a/content/common/gpu/gpu_channel.h b/content/common/gpu/gpu_channel.h
new file mode 100644
index 0000000000000000000000000000000000000000..7823af60ce6ce975532200200edf745484c82266
--- /dev/null
+++ b/content/common/gpu/gpu_channel.h
@@ -0,0 +1,483 @@
+// 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_H_
+#define CONTENT_COMMON_GPU_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 "content/common/content_export.h"
+#include "content/common/gpu/gpu_command_buffer_stub.h"
+#include "content/common/gpu/gpu_memory_manager.h"
+#include "gpu/command_buffer/service/valuebuffer_manager.h"
+#include "gpu/ipc/common/gpu_stream_constants.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 gpu {
+class PreemptionFlag;
+class SyncPointOrderData;
+class SyncPointManager;
+union ValueState;
+class ValueStateMap;
+namespace gles2 {
+class SubscriptionRefSet;
+}
+}
+
+namespace IPC {
+class MessageFilter;
+}
+
+namespace content {
+class GpuChannelManager;
+class GpuChannelMessageFilter;
+class GpuChannelMessageQueue;
+class GpuWatchdog;
+
+// Encapsulates an IPC channel between the GPU process and one renderer
+// process. On the renderer side there's a corresponding GpuChannelHost.
+class CONTENT_EXPORT GpuChannel
+    : public IPC::Listener,
+      public IPC::Sender,
+      public gpu::gles2::SubscriptionRefSet::Observer {
+ public:
+  // Takes ownership of the renderer process handle.
+  GpuChannel(GpuChannelManager* gpu_channel_manager,
+             gpu::SyncPointManager* sync_point_manager,
+             GpuWatchdog* watchdog,
+             gfx::GLShareGroup* share_group,
+             gpu::gles2::MailboxManager* mailbox_manager,
+             gpu::PreemptionFlag* preempting_flag,
+             gpu::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 gpu::ValueState& state);
+
+  GpuChannelMessageFilter* filter() const { return filter_.get(); }
+
+  // Visible for testing.
+  const gpu::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<gpu::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,
+      gpu::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(gpu::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.
+  gpu::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<gpu::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<gpu::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<gpu::gles2::MailboxManager> mailbox_manager_;
+
+  scoped_refptr<gpu::gles2::SubscriptionRefSet> subscription_ref_set_;
+
+  scoped_refptr<gpu::ValueStateMap> pending_valuebuffer_state_;
+
+  gpu::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 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,
+      gpu::GpuStreamPriority stream_priority,
+      GpuChannel* channel,
+      const scoped_refptr<base::SingleThreadTaskRunner>& io_task_runner,
+      const scoped_refptr<gpu::PreemptionFlag>& preempting_flag,
+      const scoped_refptr<gpu::PreemptionFlag>& preempted_flag,
+      gpu::SyncPointManager* sync_point_manager);
+
+  void Disable();
+  void DisableIO();
+
+  int32_t stream_id() const { return stream_id_; }
+  gpu::GpuStreamPriority stream_priority() const { return stream_priority_; }
+
+  bool IsScheduled() const;
+  void OnRescheduled(bool scheduled);
+
+  bool HasQueuedMessages() const;
+
+  base::TimeTicks GetNextMessageTimeTick() const;
+
+  scoped_refptr<gpu::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,
+      gpu::GpuStreamPriority stream_priority,
+      GpuChannel* channel,
+      const scoped_refptr<base::SingleThreadTaskRunner>& io_task_runner,
+      const scoped_refptr<gpu::PreemptionFlag>& preempting_flag,
+      const scoped_refptr<gpu::PreemptionFlag>& preempted_flag,
+      gpu::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 gpu::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<gpu::SyncPointOrderData> sync_point_order_data_;
+
+  scoped_refptr<base::SingleThreadTaskRunner> io_task_runner_;
+  scoped_refptr<gpu::PreemptionFlag> preempting_flag_;
+  scoped_refptr<gpu::PreemptionFlag> preempted_flag_;
+  gpu::SyncPointManager* const sync_point_manager_;
+
+  DISALLOW_COPY_AND_ASSIGN(GpuChannelMessageQueue);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_COMMON_GPU_GPU_CHANNEL_H_