Windows下實現gettimeofday()函數

學習自：https://blog.csdn.net/zhudinglym/article/details/71683400

#include <time.h>
#ifdef WIN32
#include <windows.h>
#else
#include <sys/time.h>
#endif
#ifdef WIN32
int gettimeofday(struct timeval *tp, void *tzp)
{
  time_t clock;
  struct tm tm;
  SYSTEMTIME wtm;
  GetLocalTime(&wtm);
  tm.tm_year   = wtm.wYear - 1900;
  tm.tm_mon   = wtm.wMonth - 1;
  tm.tm_mday   = wtm.wDay;
  tm.tm_hour   = wtm.wHour;
  tm.tm_min   = wtm.wMinute;
  tm.tm_sec   = wtm.wSecond;
  tm. tm_isdst  = -1;
  clock = mktime(&tm);
  tp->tv_sec = clock;
  tp->tv_usec = wtm.wMilliseconds * 1000;
  return (0);
}
#endif