Windows高精度时钟

封装几个代码，方便以后查询和使用

Windows高精度时钟 精度：<1us 微秒

1.1Function 1统计一段代码的CPU时间

	LARGE_INTEGER freq;
	LARGE_INTEGER beginTime;
	LARGE_INTEGER endTime;

	QueryPerformanceFrequency(&freq);
	QueryPerformanceCounter(&beginTime);
	//测试代码块时间 Begin
	
    //测试代码块时间 End
    QueryPerformanceCounter(&endTime);
    double second = (double)(endTime.QuadPart - beginTime.QuadPart) / (double)freq.QuadPart;

1.2更方便的宏定义

#define COUNT_BEGIN  LARGE_INTEGER freq,beginTime,LARGE_INTEGER endTime;\
QueryPerformanceFrequency(&freq);\
QueryPerformanceCounter(&beginTime);

#define COUNT_END QueryPerformanceCounter(&endTime);
#define SHOW_TIME_COUNT printf("%llf second passed\n",(double)(endTime.QuadPart - beginTime.QuadPart) / (double)freq.QuadPart;);

2.1Function 2高精度Sleep()

LARGE_INTEGER freq;  
LARGE_INTEGER start, end;  
QueryPerformanceFrequency(&freq);  
unsigned int s = 0; //此处填入延时的秒数
unsigned int ms = 0; //此处填入延时的毫秒数
unsigned int us = 100000; //此处填入需要延时的微秒数  
us += ms*1000+s*1000*1000;
LONGLONG count = (us * freq.QuadPart) / (1000 * 1000);  
QueryPerformanceCounter(&start);  
count = count + startQuadPart ;  
do  
{  
   QueryPerformanceCounter(&end);  
}while(end.QuadPart< count);  

2.2 更方便的宏定义

#define SLEEP_S(S)
LARGE_INTEGER freq;  \
LARGE_INTEGER start, end;  \
QueryPerformanceFrequency(&freq);  \
LONGLONG count = (S*1000*1000 * freq.QuadPart) / (1000 * 1000);  \
QueryPerformanceCounter(&start);  \
count = count + startQuadPart ;  \
do  \
{  \
   QueryPerformanceCounter(&end);  \
}while(end.QuadPart< count);  

#define SLEEP_MS(MS)
LARGE_INTEGER freq;  \
LARGE_INTEGER start, end;  \
QueryPerformanceFrequency(&freq);  \
LONGLONG count = (S*1000 * freq.QuadPart) / (1000 * 1000);  \
QueryPerformanceCounter(&start);  \
count = count + startQuadPart ;  \
do  \
{  \
   QueryPerformanceCounter(&end);  \
}while(end.QuadPart< count);  

#define SLEEP_US(US)
LARGE_INTEGER freq;  \
LARGE_INTEGER start, end;  \
QueryPerformanceFrequency(&freq);  \
LONGLONG count = (US * freq.QuadPart) / (1000 * 1000);  \
QueryPerformanceCounter(&start);  \
count = count + startQuadPart ;  \
do  \
{  \
   QueryPerformanceCounter(&end);  \
}while(end.QuadPart< count);