cc/debug/rendering_stats_instrumentation.h

   1 // Copyright 2013 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 CC_DEBUG_RENDERING_STATS_INSTRUMENTATION_H_
   6 #define CC_DEBUG_RENDERING_STATS_INSTRUMENTATION_H_
   7
   8 #include "base/memory/scoped_ptr.h"
   9 #include "base/synchronization/lock.h"
  10 #include "cc/debug/rendering_stats.h"
  11
  12 namespace cc {
  13
  14 // RenderingStatsInstrumentation is shared among threads and manages conditional
  15 // recording of rendering stats into a private RenderingStats instance.
  16 class CC_EXPORT RenderingStatsInstrumentation {
  17  public:
  18   static scoped_ptr<RenderingStatsInstrumentation> Create();
  19   virtual ~RenderingStatsInstrumentation();
  20
  21   // Return current main thread rendering stats.
  22   const MainThreadRenderingStats& main_thread_rendering_stats() {
  23     return main_stats_;
  24   }
  25   // Return current impl thread rendering stats.
  26   const ImplThreadRenderingStats& impl_thread_rendering_stats() {
  27     return impl_stats_;
  28   }
  29   // Return the accumulated, combined rendering stats.
  30   RenderingStats GetRenderingStats();
  31
  32   // Add current main thread rendering stats to accumulator and
  33   // clear current stats.
  34   void AccumulateAndClearMainThreadStats();
  35   // Add current impl thread rendering stats to accumulator and
  36   // clear current stats.
  37   void AccumulateAndClearImplThreadStats();
  38
  39   // Read and write access to the record_rendering_stats_ flag is not locked to
  40   // improve performance. The flag is commonly turned off and hardly changes
  41   // it's value during runtime.
  42   bool record_rendering_stats() const { return record_rendering_stats_; }
  43   void set_record_rendering_stats(bool record_rendering_stats) {
  44     if (record_rendering_stats_ != record_rendering_stats)
  45       record_rendering_stats_ = record_rendering_stats;
  46   }
  47
  48   base::TimeTicks StartRecording() const;
  49   base::TimeDelta EndRecording(base::TimeTicks start_time) const;
  50
  51   void IncrementFrameCount(int64 count, bool main_thread);
  52   void AddPaint(base::TimeDelta duration, int64 pixels);
  53   void AddRecord(base::TimeDelta duration, int64 pixels);
  54   void AddRaster(base::TimeDelta duration, int64 pixels);
  55
  56  protected:
  57   RenderingStatsInstrumentation();
  58
  59  private:
  60   // TODO(ernstm): rename to *_thread_rendering_stats_*
  61   MainThreadRenderingStats main_stats_;
  62   MainThreadRenderingStats main_stats_accu_;
  63   ImplThreadRenderingStats impl_stats_;
  64   ImplThreadRenderingStats impl_stats_accu_;
  65
  66   bool record_rendering_stats_;
  67
  68   base::Lock lock_;
  69
  70   DISALLOW_COPY_AND_ASSIGN(RenderingStatsInstrumentation);
  71 };
  72
  73 }  // namespace cc
  74
  75 #endif  // CC_DEBUG_RENDERING_STATS_INSTRUMENTATION_H_