EngineTimer::Convert::Convert(): _toS(0), _toMs(0), _toMu(0), _toNs(0)
{
auto frequency = QueryFrequency();
auto toSeconds = 1.0/(SCAST(f64, frequency));
_toS = toSeconds;
_toMs = MsFromSec*toSeconds;
_toMu = MuFromSec*toSeconds;
_toNs = NsFromSec*toSeconds;
}
namespace scgl
{
long long QueryFrequency()
{
LARGE_INTEGER nFrequency;
QueryPerformanceFrequency(&nFrequency);
return nFrequency.QuadPart / 1000;
}
long long CStopwatch::m_nFrequency = QueryFrequency();
CStopwatch::CStopwatch(void)
{
Start();
}
CStopwatch::~CStopwatch(void)
{
}
void CStopwatch::Start()
{
m_nStart = Rdtsc();
}
long long CStopwatch::Now() const
{
return (Rdtsc() - m_nStart) / m_nFrequency;
}
long long CStopwatch::Rdtsc()
{
static LARGE_INTEGER tc;
QueryPerformanceCounter(&tc);
return tc.QuadPart;
}
}
FORCEINLINE int Get(int64 coef)
{
return (int)(m_acc * coef / QueryFrequency());
}
