37 lines
1.2 KiB
C
37 lines
1.2 KiB
C
#ifdef _MSC_VER
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#pragma warning(disable:4100)
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#endif
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#include "windows.h"
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const unsigned long long int DELTA_EPOCH_IN_MICROSECS = 11644473600000000;
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void gettimeofday(struct timeval *tv, void *tz)
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{
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FILETIME ft;
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unsigned long long int highResolutionTime;
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TIME_ZONE_INFORMATION tz_winapi;
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int result_tz;
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long long int timezone_time_bias_in_minutes;
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ZeroMemory(&ft, sizeof(ft));
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ZeroMemory(&tz_winapi, sizeof(tz_winapi));
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GetSystemTimeAsFileTime(&ft);
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result_tz = GetTimeZoneInformation(&tz_winapi);
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timezone_time_bias_in_minutes = tz_winapi.Bias + ((result_tz == TIME_ZONE_ID_DAYLIGHT) ? tz_winapi.DaylightBias : 0);
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highResolutionTime = ft.dwHighDateTime;
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highResolutionTime <<= 32;
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highResolutionTime |= ft.dwLowDateTime;
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/* Converting file time to unix epoch */
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/* Convert to microseconds */
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highResolutionTime /= 10;
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/* Add timezone bias conververt from minutes to microsecond */
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highResolutionTime -= timezone_time_bias_in_minutes*60*1000000;
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highResolutionTime -= DELTA_EPOCH_IN_MICROSECS;
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tv->tv_sec = (long int) (highResolutionTime/1000000);
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tv->tv_usec = (highResolutionTime%1000000);
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}
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