cc/test/lap_timer.cc

   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 #include "cc/test/lap_timer.h"
   6
   7 #include "base/logging.h"
   8
   9 namespace cc {
  10
  11 LapTimer::LapTimer(int warmup_laps,
  12                    base::TimeDelta time_limit,
  13                    int check_interval)
  14     : warmup_laps_(warmup_laps),
  15       time_limit_(time_limit),
  16       check_interval_(check_interval) {
  17   DCHECK_GT(check_interval, 0);
  18   Reset();
  19 }
  20
  21 void LapTimer::Reset() {
  22   accumulator_ = base::TimeDelta();
  23   num_laps_ = 0;
  24   accumulated_ = true;
  25   remaining_warmups_ = warmup_laps_;
  26   Start();
  27 }
  28
  29 void LapTimer::Start() { start_time_ = base::TimeTicks::HighResNow(); }
  30
  31 bool LapTimer::IsWarmedUp() { return remaining_warmups_ <= 0; }
  32
  33 void LapTimer::NextLap() {
  34   if (!IsWarmedUp()) {
  35     --remaining_warmups_;
  36     if (IsWarmedUp()) {
  37       Start();
  38     }
  39     return;
  40   }
  41   ++num_laps_;
  42   accumulated_ = (num_laps_ % check_interval_) == 0;
  43   if (accumulated_) {
  44     base::TimeTicks now = base::TimeTicks::HighResNow();
  45     accumulator_ += now - start_time_;
  46     start_time_ = now;
  47   }
  48 }
  49
  50 bool LapTimer::HasTimeLimitExpired() { return accumulator_ >= time_limit_; }
  51
  52 float LapTimer::MsPerLap() {
  53   DCHECK(accumulated_);
  54   return accumulator_.InMillisecondsF() / num_laps_;
  55 }
  56
  57 float LapTimer::LapsPerSecond() {
  58   DCHECK(accumulated_);
  59   return num_laps_ / accumulator_.InSecondsF();
  60 }
  61
  62 int LapTimer::NumLaps() { return num_laps_; }
  63
  64 }  // namespace cc