Timer.Windows.cpp

#include "Timer.h"
 
#define WIN32_LEAN_AND_MEAN
#include <Windows.h>
 
namespace{
  struct PerfFreq
  {
    PerfFreq()
    {
      QueryPerformanceFrequency(&frequency);
    }
 
    LARGE_INTEGER frequency;
  };
  PerfFreq perfFreq;
};
 
Cogs::TimePerf Cogs::perfTime()
{
  LARGE_INTEGER t;
  QueryPerformanceCounter(&t);
  return t.QuadPart;
}
 
Cogs::Time Cogs::currentTime()
{
  LARGE_INTEGER time;
  GetSystemTimeAsFileTime(reinterpret_cast<FILETIME*>(&time));
  return time.QuadPart - 116444736000000000LL;
}
 
int64_t Cogs::perfTimeToMicroseconds(TimePerf time)
{
  return (time * 1000000) / perfFreq.frequency.QuadPart;
}
int64_t Cogs::perfTimeToMilliseconds(TimePerf time)
{
  return (time * 1000) / perfFreq.frequency.QuadPart;
}
double Cogs::perfTimeToSeconds(TimePerf time)
{
  return time * (1.0 / perfFreq.frequency.QuadPart);
}
 
int64_t Cogs::currentTimeToMicroseconds(Time time)
{
  return time / 10;
}
int64_t Cogs::currentTimeToMilliseconds(Time time)
{
  return time / 10000;
}
double Cogs::currentTimeToSeconds(Time time)
{
  return time / 10000000.0;
}