Stopwatch.h

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#pragma once
#include "HephShared.h"
#include <chrono>
 
#define HEPH_SW_NANO    (1e-9)
#define HEPH_SW_MICRO   (1e-6)
#define HEPH_SW_MILLI   (1e-3)
 
#define HEPH_SW_RESET   Heph::Stopwatch::GetInstance().Reset()
 
#define HEPH_SW_DT      Heph::Stopwatch::GetInstance().DeltaTime()
 
#define HEPH_SW_DT_S    Heph::Stopwatch::GetInstance().DeltaTime()
 
#define HEPH_SW_DT_MS   Heph::Stopwatch::GetInstance().DeltaTime(HEPH_SW_MILLI)
 
#define HEPH_SW_DT_US   Heph::Stopwatch::GetInstance().DeltaTime(HEPH_SW_MICRO)
 
#define HEPH_SW_DT_NS   Heph::Stopwatch::GetInstance().DeltaTime(HEPH_SW_NANO)
 
namespace Heph
{
    class HEPH_API Stopwatch final
    {
    private:
        std::chrono::steady_clock::time_point tp;
        
    public:
        Stopwatch();
 
        void Reset();
 
        double DeltaTime() const;
 
        double DeltaTime(double prefix) const;
 
        static Stopwatch& GetInstance() noexcept;
    };
}