#include <stopwatch.h>

Inheritance diagram for flutter::Stopwatch:

Classes
class	RefreshRateUpdater
	The refresh rate interface for `Stopwatch`. More...

Public Member Functions
	Stopwatch (const RefreshRateUpdater &updater)

	~Stopwatch ()

const fml::TimeDelta &	GetLap (size_t index) const

size_t	GetLapsCount () const
	Return a reference to all the laps.

size_t	GetCurrentSample () const

const fml::TimeDelta &	LastLap () const

fml::TimeDelta	MaxDelta () const

fml::TimeDelta	AverageDelta () const

void	Start ()

void	Stop ()

void	SetLapTime (const fml::TimeDelta &delta)

fml::Milliseconds	GetFrameBudget () const
	All places which want to get frame_budget should call this function.

Static Public Attributes
static const size_t	kMaxSamples = 120

Detailed Description

Definition at line 17 of file stopwatch.h.

Constructor & Destructor Documentation

◆ Stopwatch()

flutter::Stopwatch::Stopwatch ( const RefreshRateUpdater & updater )

explicit

The constructor with a updater parameter, it will update frame_budget everytime when GetFrameBudget() is called.

Definition at line 9 of file stopwatch.cc.

    : refresh_rate_updater_(updater), start_(fml::TimePoint::Now()) {
  const fml::TimeDelta delta = fml::TimeDelta::Zero();
  laps_.resize(kMaxSamples, delta);
}

References kMaxSamples, and fml::TimeDelta::Zero().

◆ ~Stopwatch()

flutter::Stopwatch::~Stopwatch ( )

default

Member Function Documentation

◆ AverageDelta()

fml::TimeDelta flutter::Stopwatch::AverageDelta ( ) const

Definition at line 77 of file stopwatch.cc.

                                           {
  fml::TimeDelta sum;  // default to 0
  for (size_t i = 0; i < kMaxSamples; i++) {
    sum = sum + laps_[i];
  }
  return sum / kMaxSamples;
}

References i, and kMaxSamples.

Referenced by flutter::PerformanceOverlayLayer::MakeStatisticsText().

◆ GetCurrentSample()

size_t flutter::Stopwatch::GetCurrentSample ( ) const

Definition at line 50 of file stopwatch.cc.

                                         {
  return current_sample_;
}

Referenced by flutter::testing::TEST(), flutter::testing::TEST(), and flutter::DlStopwatchVisualizer::Visualize().

◆ GetFrameBudget()

fml::Milliseconds flutter::Stopwatch::GetFrameBudget ( ) const

All places which want to get frame_budget should call this function.

Definition at line 85 of file stopwatch.cc.

                                                {
  return refresh_rate_updater_.GetFrameBudget();
}

References flutter::Stopwatch::RefreshRateUpdater::GetFrameBudget().

Referenced by flutter::StopwatchVisualizer::StopwatchVisualizer(), flutter::testing::TEST(), flutter::testing::TEST(), and flutter::testing::TEST().

◆ GetLap()

const fml::TimeDelta & flutter::Stopwatch::GetLap ( size_t index ) const

Definition at line 42 of file stopwatch.cc.

                                                        {
  return laps_[index];
}

Referenced by flutter::testing::TEST(), and flutter::DlStopwatchVisualizer::Visualize().

◆ GetLapsCount()

size_t flutter::Stopwatch::GetLapsCount ( ) const

Return a reference to all the laps.

Definition at line 46 of file stopwatch.cc.

                                     {
  return laps_.size();
}

Referenced by flutter::testing::TEST(), and flutter::DlStopwatchVisualizer::Visualize().

◆ LastLap()

const fml::TimeDelta & flutter::Stopwatch::LastLap ( ) const

Definition at line 38 of file stopwatch.cc.

                                             {
  return laps_[current_sample_];
}

Referenced by flutter::DlStopwatchVisualizer::Visualize().

◆ MaxDelta()

fml::TimeDelta flutter::Stopwatch::MaxDelta ( ) const

Definition at line 67 of file stopwatch.cc.

                                       {
  fml::TimeDelta max_delta;
  for (size_t i = 0; i < kMaxSamples; i++) {
    if (laps_[i] > max_delta) {
      max_delta = laps_[i];
    }
  }
  return max_delta;
}

References i, and kMaxSamples.

Referenced by flutter::PerformanceOverlayLayer::MakeStatisticsText().

◆ SetLapTime()

void flutter::Stopwatch::SetLapTime ( const fml::TimeDelta & delta )

Definition at line 33 of file stopwatch.cc.

                                                    {
  current_sample_ = (current_sample_ + 1) % kMaxSamples;
  laps_[current_sample_] = delta;
}

References kMaxSamples.

Referenced by Stop(), flutter::testing::TEST(), flutter::testing::TEST(), and flutter::testing::TEST().

◆ Start()

void flutter::Stopwatch::Start ( )

Definition at line 25 of file stopwatch.cc.

                      {
  start_ = fml::TimePoint::Now();
}

References fml::TimePoint::Now().

Referenced by flutter::testing::TEST().

◆ Stop()

void flutter::Stopwatch::Stop ( )

Definition at line 29 of file stopwatch.cc.

                     {
  SetLapTime(fml::TimePoint::Now() - start_);
}

References fml::TimePoint::Now(), and SetLapTime().

Referenced by flutter::testing::TEST().

Member Data Documentation

◆ kMaxSamples

const size_t flutter::Stopwatch::kMaxSamples = 120

static

Definition at line 20 of file stopwatch.h.

Referenced by AverageDelta(), MaxDelta(), SetLapTime(), Stopwatch(), flutter::testing::TEST(), and flutter::testing::TEST().

The documentation for this class was generated from the following files:

flow/stopwatch.h
flow/stopwatch.cc

Classes

Public Member Functions

Static Public Attributes