Program Listing for File timer.h

↰ Return to documentation for file (rootex/os/timer.h)

#pragma once

#include <chrono>

#include "common/common.h"

typedef std::chrono::time_point<std::chrono::high_resolution_clock> TimePoint;

class Timer
{
protected:
    static const std::chrono::high_resolution_clock s_Clock;

    TimePoint m_StartTime;
    TimePoint m_EndTime;

public:
    static TimePoint Now();

    Timer();
    Timer(Timer&) = delete;
    virtual ~Timer() = default;

    float getTimeMs() const { return (float)(s_Clock.now() - m_StartTime).count() * NS_TO_MS; }
    float getTimeNs() const { return (s_Clock.now() - m_StartTime).count(); }
};

class StopTimer : public Timer
{
public:
    StopTimer() = default;
    StopTimer(StopTimer&) = delete;
    virtual ~StopTimer() = default;

    void reset();
};

class LoggingScopeTimer : public Timer
{
    String m_Message;

public:
    LoggingScopeTimer(const String& msg);
    LoggingScopeTimer(LoggingScopeTimer&) = delete;
    virtual ~LoggingScopeTimer();
};

class FrameTimer : public LoggingScopeTimer
{
    unsigned long long int m_FrameCount;
    std::chrono::time_point<std::chrono::high_resolution_clock> m_FrameStartTime;
    float m_LastFrameTime;

public:
    FrameTimer();
    ~FrameTimer() = default;

    void reset();

    void showTime();
    void showFPS();

    float getFrameTime() const { return (s_Clock.now() - m_FrameStartTime).count() * NS_TO_MS; }
    float getLastFrameTime() const { return m_LastFrameTime; }
    float getLastFPS() const { return 1.0f / (m_LastFrameTime * MS_TO_S); }
};