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【C】时钟控制

作者:LiuK,2 / 发布于2012/6/25/ 523

ifndef CPU_TIMER_LK
#define CPU_TIMER_LK</div>
#include <Windows.h>
#include <ctime></div>
<div>namespace util
{
//???????
struct high_accurary_timer
{
high_accurary_timer()
{
QueryPerformanceFrequency(&m_freq);
QueryPerformanceCounter(&m_startCount);
}
<div>void restart() 
{ 
QueryPerformanceCounter(&m_startCount); 
}
<div>double elaspe()//??clock???? ??
{
QueryPerformanceCounter(&m_endCount);
return (double)
(m_endCount.QuadPart - m_startCount.QuadPart) / m_freq.QuadPart;
}
<div>private:
 LARGE_INTEGER m_startCount;//???????clock??
 LARGE_INTEGER m_endCount;//???????clock??
 LARGE_INTEGER m_freq;//????
};</div>
<div>struct std_timer
{
std_timer()
{
m_Time = std::clock();
}
<div>void restart()
{
m_Time = std::clock(); 
}
<div>double elaspe()//??clock???? ??
{
return double(std::clock() - m_Time) / CLOCKS_PER_SEC; 
}
private:
std::clock_t m_Time; 
};</div>
<div>
template<class Timer>
inline
void timer_wait(int millseconds)
{
Timer timer;
double stopSeconds = double(millseconds)/1000;
while( timer.elaspe() < stopSeconds);
}
<div>
template<class Timer>
inline
void timer_wait(Timer& timer , int millseconds)
{
timer.restart();
double stopSeconds = double(millseconds)/1000;
while( timer.elaspe() < stopSeconds);
}
<div>
inline
void timer_wait(int millseconds)
{
high_accurary_timer timer;
double stopSeconds = double(millseconds)/1000;
while( timer.elaspe() < stopSeconds);
}
<div>}
<div>endif</div>

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