cc/debug/paint_time_counter.cc

   1 // Copyright 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 #include "cc/debug/paint_time_counter.h"
   6
   7 namespace cc {
   8
   9 // static
  10 scoped_ptr<PaintTimeCounter> PaintTimeCounter::Create() {
  11   return make_scoped_ptr(new PaintTimeCounter());
  12 }
  13
  14 PaintTimeCounter::PaintTimeCounter() {
  15 }
  16
  17 void PaintTimeCounter::SavePaintTime(const base::TimeDelta& paint_time) {
  18   ring_buffer_.SaveToBuffer(paint_time);
  19 }
  20
  21 void PaintTimeCounter::GetMinAndMaxPaintTime(base::TimeDelta* min,
  22                                              base::TimeDelta* max) const {
  23   *min = base::TimeDelta::FromDays(1);
  24   *max = base::TimeDelta();
  25
  26   for (RingBufferType::Iterator it = ring_buffer_.Begin(); it; ++it) {
  27     const base::TimeDelta paint_time = **it;
  28
  29     if (paint_time < *min)
  30       *min = paint_time;
  31     if (paint_time > *max)
  32       *max = paint_time;
  33   }
  34
  35   if (*min > *max)
  36     *min = *max;
  37 }
  38
  39 void PaintTimeCounter::ClearHistory() {
  40   ring_buffer_.Clear();
  41 }
  42
  43 }  // namespace cc