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ZXTimer.cpp

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#include "ZXBase/ZXTimer.h"

#include <sys/types.h>

#include <fcntl.h>

#include <windows.h>

#include <winbase.h>

namespace zx

{

Timer::Timer()

{

LARGE_INTEGER frequency;//LARGE_INTEGER 64位的共同体

if(::QueryPerformanceFrequency(&frequency))//获取当前的性能，无法获取时返回0

m_SecondPerTick = 1.0/(double)frequency.QuadPart;

else

m_SecondPerTick = 1.0;

}

Timer_t Timer::tick() const

{

LARGE_INTEGER qpc;

if (::QueryPerformanceCounter(&qpc))

return qpc.QuadPart;

else

return 0;

}

double Timer::delta_s( Timer_t t1, Timer_t t2 )

{

return (double)(t2 - t1)*m_SecondPerTick;

}

};