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服务器之家 - 编程语言 - C/C++ - 关于win32 gettimeofday替代方案

关于win32 gettimeofday替代方案

2021-04-25 14:14jingxian C/C++

下面小编就为大家带来一篇关于win32 gettimeofday替代方案。小编觉得挺不错的,现在就分享给大家,也给大家做个参考。一起跟随小编过来看看吧

来自nginx代码:

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void
ngx_gettimeofday(struct timeval *tp)
{
  uint64_t intervals;
  FILETIME ft;
 
  GetSystemTimeAsFileTime(&ft);
 
  /*
   * A file time is a 64-bit value that represents the number
   * of 100-nanosecond intervals that have elapsed since
   * January 1, 1601 12:00 A.M. UTC.
   *
   * Between January 1, 1970 (Epoch) and January 1, 1601 there were
   * 134744 days,
   * 11644473600 seconds or
   * 11644473600,000,000,0 100-nanosecond intervals.
   *
   * See also MSKB Q167296.
   */
 
  intervals = ((uint64_t) ft.dwHighDateTime << 32) | ft.dwLowDateTime;
  intervals -= 116444736000000000;
 
  tp->tv_sec = (long) (intervals / 10000000);
  tp->tv_usec = (long) ((intervals % 10000000) / 10);
}

以上就是小编为大家带来的关于win32 gettimeofday替代方案全部内容了,希望大家多多支持服务器之家~

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