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| 1 // Copyright 2014 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/lap_timer.h" | |
| 6 | |
| 7 #include "base/logging.h" | |
| 8 | |
| 9 namespace cc { | |
| 10 | |
| 11 namespace { | |
| 12 | |
| 13 base::TimeDelta Now() { | |
| 14 return base::ThreadTicks::IsSupported() | |
| 15 ? base::ThreadTicks::Now() - base::ThreadTicks() | |
| 16 : base::TimeTicks::Now() - base::TimeTicks(); | |
| 17 } | |
| 18 | |
| 19 } // namespace | |
| 20 | |
| 21 LapTimer::LapTimer(int warmup_laps, | |
| 22 base::TimeDelta time_limit, | |
| 23 int check_interval) | |
| 24 : warmup_laps_(warmup_laps), | |
| 25 remaining_warmups_(0), | |
| 26 remaining_no_check_laps_(0), | |
| 27 time_limit_(time_limit), | |
| 28 check_interval_(check_interval) { | |
| 29 DCHECK_GT(check_interval, 0); | |
| 30 Reset(); | |
| 31 } | |
| 32 | |
| 33 void LapTimer::Reset() { | |
| 34 accumulator_ = base::TimeDelta(); | |
| 35 num_laps_ = 0; | |
| 36 remaining_warmups_ = warmup_laps_; | |
| 37 remaining_no_check_laps_ = check_interval_; | |
| 38 Start(); | |
| 39 } | |
| 40 | |
| 41 void LapTimer::Start() { | |
| 42 start_time_ = Now(); | |
| 43 } | |
| 44 | |
| 45 bool LapTimer::IsWarmedUp() { return remaining_warmups_ <= 0; } | |
| 46 | |
| 47 void LapTimer::NextLap() { | |
| 48 if (!IsWarmedUp()) { | |
| 49 --remaining_warmups_; | |
| 50 if (IsWarmedUp()) { | |
| 51 Start(); | |
| 52 } | |
| 53 return; | |
| 54 } | |
| 55 ++num_laps_; | |
| 56 --remaining_no_check_laps_; | |
| 57 if (!remaining_no_check_laps_) { | |
| 58 base::TimeDelta now = Now(); | |
| 59 accumulator_ += now - start_time_; | |
| 60 start_time_ = now; | |
| 61 remaining_no_check_laps_ = check_interval_; | |
| 62 } | |
| 63 } | |
| 64 | |
| 65 bool LapTimer::HasTimeLimitExpired() { return accumulator_ >= time_limit_; } | |
| 66 | |
| 67 bool LapTimer::HasTimedAllLaps() { return !(num_laps_ % check_interval_); } | |
| 68 | |
| 69 float LapTimer::MsPerLap() { | |
| 70 DCHECK(HasTimedAllLaps()); | |
| 71 return accumulator_.InMillisecondsF() / num_laps_; | |
| 72 } | |
| 73 | |
| 74 float LapTimer::LapsPerSecond() { | |
| 75 DCHECK(HasTimedAllLaps()); | |
| 76 return num_laps_ / accumulator_.InSecondsF(); | |
| 77 } | |
| 78 | |
| 79 int LapTimer::NumLaps() { return num_laps_; } | |
| 80 | |
| 81 } // namespace cc | |
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