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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CONTENT_GPU_GPU_CHILD_THREAD_H_
      6 #define CONTENT_GPU_GPU_CHILD_THREAD_H_
      7 
      8 #include <queue>
      9 #include <string>
     10 
     11 #include "base/basictypes.h"
     12 #include "base/command_line.h"
     13 #include "base/memory/ref_counted.h"
     14 #include "base/memory/scoped_ptr.h"
     15 #include "base/time/time.h"
     16 #include "build/build_config.h"
     17 #include "content/child/child_thread.h"
     18 #include "content/common/gpu/gpu_channel.h"
     19 #include "content/common/gpu/gpu_channel_manager.h"
     20 #include "content/common/gpu/gpu_config.h"
     21 #include "content/common/gpu/x_util.h"
     22 #include "gpu/config/gpu_info.h"
     23 #include "ui/gfx/native_widget_types.h"
     24 
     25 namespace sandbox {
     26 class TargetServices;
     27 }
     28 
     29 namespace content {
     30 class GpuWatchdogThread;
     31 
     32 // The main thread of the GPU child process. There will only ever be one of
     33 // these per process. It does process initialization and shutdown. It forwards
     34 // IPC messages to GpuChannelManager, which is responsible for issuing rendering
     35 // commands to the GPU.
     36 class GpuChildThread : public ChildThread {
     37  public:
     38   typedef std::queue<IPC::Message*> DeferredMessages;
     39 
     40   explicit GpuChildThread(GpuWatchdogThread* gpu_watchdog_thread,
     41                           bool dead_on_arrival,
     42                           const gpu::GPUInfo& gpu_info,
     43                           const DeferredMessages& deferred_messages);
     44 
     45   // For single-process mode.
     46   explicit GpuChildThread(const std::string& channel_id);
     47 
     48   virtual ~GpuChildThread();
     49 
     50   virtual void Shutdown() OVERRIDE;
     51 
     52   void Init(const base::Time& process_start_time);
     53   void StopWatchdog();
     54 
     55   // ChildThread overrides.
     56   virtual bool Send(IPC::Message* msg) OVERRIDE;
     57   virtual bool OnControlMessageReceived(const IPC::Message& msg) OVERRIDE;
     58 
     59  private:
     60   // Message handlers.
     61   void OnInitialize();
     62   void OnCollectGraphicsInfo();
     63   void OnGetVideoMemoryUsageStats();
     64   void OnSetVideoMemoryWindowCount(uint32 window_count);
     65 
     66   void OnClean();
     67   void OnCrash();
     68   void OnHang();
     69   void OnDisableWatchdog();
     70 
     71 #if defined(USE_TCMALLOC)
     72   void OnGetGpuTcmalloc();
     73 #endif
     74 
     75   // Set this flag to true if a fatal error occurred before we receive the
     76   // OnInitialize message, in which case we just declare ourselves DOA.
     77   bool dead_on_arrival_;
     78   base::Time process_start_time_;
     79   scoped_refptr<GpuWatchdogThread> watchdog_thread_;
     80 
     81 #if defined(OS_WIN)
     82   // Windows specific client sandbox interface.
     83   sandbox::TargetServices* target_services_;
     84 #endif
     85 
     86   scoped_ptr<GpuChannelManager> gpu_channel_manager_;
     87 
     88   // Information about the GPU, such as device and vendor ID.
     89   gpu::GPUInfo gpu_info_;
     90 
     91   // Error messages collected in gpu_main() before the thread is created.
     92   DeferredMessages deferred_messages_;
     93 
     94   // Whether the GPU thread is running in the browser process.
     95   bool in_browser_process_;
     96 
     97   DISALLOW_COPY_AND_ASSIGN(GpuChildThread);
     98 };
     99 
    100 }  // namespace content
    101 
    102 #endif  // CONTENT_GPU_GPU_CHILD_THREAD_H_
    103