77 lines
2.2 KiB
C
77 lines
2.2 KiB
C
/**
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* This file has no copyright assigned and is placed in the Public Domain.
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* This file is part of the mingw-w64 runtime package.
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* No warranty is given; refer to the file DISCLAIMER.PD within this package.
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*/
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#include <time.h>
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#include <sys/time.h>
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#include <sys/timeb.h>
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#include <errno.h>
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#include <windows.h>
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#define FILETIME_1970 116444736000000000ull /* seconds between 1/1/1601 and 1/1/1970 */
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#define HECTONANOSEC_PER_SEC 10000000ull
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int getntptimeofday(struct timespec *, struct timezone *);
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int getntptimeofday(struct timespec *tp, struct timezone *z)
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{
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int res = 0;
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union
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{
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unsigned long long ns100; /*time since 1 Jan 1601 in 100ns units */
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FILETIME ft;
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} _now;
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TIME_ZONE_INFORMATION TimeZoneInformation;
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DWORD tzi;
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if (z != NULL)
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{
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if ((tzi = GetTimeZoneInformation(&TimeZoneInformation)) != TIME_ZONE_ID_INVALID)
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{
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z->tz_minuteswest = TimeZoneInformation.Bias;
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if (tzi == TIME_ZONE_ID_DAYLIGHT)
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z->tz_dsttime = 1;
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else
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z->tz_dsttime = 0;
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}
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else
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{
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z->tz_minuteswest = 0;
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z->tz_dsttime = 0;
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}
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}
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if (tp != NULL)
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{
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GetSystemTimeAsFileTime(&_now.ft); /* 100-nanoseconds since 1-1-1601 */
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/* The actual accuracy on XP seems to be 125,000 nanoseconds = 125 microseconds = 0.125 milliseconds */
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_now.ns100 -= FILETIME_1970; /* 100 nano-seconds since 1-1-1970 */
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tp->tv_sec = _now.ns100 / HECTONANOSEC_PER_SEC; /* seconds since 1-1-1970 */
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tp->tv_nsec = (long)(_now.ns100 % HECTONANOSEC_PER_SEC) * 100; /* nanoseconds */
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}
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return res;
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}
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int __cdecl gettimeofday(struct timeval *p, void *z)
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{
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struct timespec tp;
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if (getntptimeofday(&tp, (struct timezone *) z))
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return -1;
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p->tv_sec = (long)tp.tv_sec;
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p->tv_usec = (tp.tv_nsec / 1000);
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return 0;
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}
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int __cdecl mingw_gettimeofday(struct timeval *p, struct timezone *z)
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{
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struct timespec tp;
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if (getntptimeofday(&tp, z))
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return -1;
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p->tv_sec = (long)tp.tv_sec;
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p->tv_usec = (tp.tv_nsec / 1000);
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return 0;
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}
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