timer.h

来自「我的红黑树的c++实现。主要特点是可以用dot工具把红黑树画出来」· C头文件 代码 · 共 44 行

// file timer.h
//created by alpha 2008.11.15

#ifndef TIMER_H
#define TIMER_H
#include <windows.h>

class Timer
{
private:
    int _freq;
    LARGE_INTEGER _begin;
    LARGE_INTEGER _end;

public:
    long costTime;            // 花费的时间(精确到微秒)

public:
    Timer()
    {
        LARGE_INTEGER tmp;
        QueryPerformanceFrequency(&tmp);
        _freq = tmp.QuadPart;
        costTime = 0;
    }

    void Start()            // 开始计时
    {
        QueryPerformanceCounter(&_begin);
    }

    void End()                // 结束计时
    {
        QueryPerformanceCounter(&_end);
        costTime = (long)((_end.QuadPart - _begin.QuadPart) * 1000000 / _freq);
    }

    void Reset()            // 计时清0
    {
        costTime = 0;
    }
};
#endif