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 copy of current impl thread rendering stats.
  22   RenderingStats impl_thread_rendering_stats();
  23
  24   // Return the accumulated, combined rendering stats.
  25   RenderingStats GetRenderingStats();
  26
  27   // Add current impl thread rendering stats to accumulator and
  28   // clear current stats.
  29   void AccumulateAndClearImplThreadStats();
  30
  31   // Read and write access to the record_rendering_stats_ flag is not locked to
  32   // improve performance. The flag is commonly turned off and hardly changes
  33   // it's value during runtime.
  34   bool record_rendering_stats() const { return record_rendering_stats_; }
  35   void set_record_rendering_stats(bool record_rendering_stats) {
  36     if (record_rendering_stats_ != record_rendering_stats)
  37       record_rendering_stats_ = record_rendering_stats;
  38   }
  39
  40   base::TimeTicks StartRecording() const;
  41   base::TimeDelta EndRecording(base::TimeTicks start_time) const;
  42
  43   void IncrementFrameCount(int64 count);
  44   void AddVisibleContentArea(int64 area);
  45   void AddApproximatedVisibleContentArea(int64 area);
  46   void AddDrawDuration(base::TimeDelta draw_duration,
  47                        base::TimeDelta draw_duration_estimate);
  48   void AddBeginMainFrameToCommitDuration(
  49       base::TimeDelta begin_main_frame_to_commit_duration,
  50       base::TimeDelta begin_main_frame_to_commit_duration_estimate);
  51   void AddCommitToActivateDuration(
  52       base::TimeDelta commit_to_activate_duration,
  53       base::TimeDelta commit_to_activate_duration_estimate);
  54
  55  protected:
  56   RenderingStatsInstrumentation();
  57
  58  private:
  59   RenderingStats impl_thread_rendering_stats_;
  60   RenderingStats impl_thread_rendering_stats_accu_;
  61
  62   bool record_rendering_stats_;
  63
  64   base::Lock lock_;
  65
  66   DISALLOW_COPY_AND_ASSIGN(RenderingStatsInstrumentation);
  67 };
  68
  69 }  // namespace cc
  70
  71 #endif  // CC_DEBUG_RENDERING_STATS_INSTRUMENTATION_H_