1 /**
2 * This file has no copyright assigned and is placed in the Public Domain.
3 * This file is part of the mingw-w64 runtime package.
4 * No warranty is given; refer to the file DISCLAIMER.PD within this package.
5 */
6 #include <time.h>
7 #include <sys/time.h>
8 #include <sys/timeb.h>
9 #include <errno.h>
10 #include <windows.h>
11
12 #define FILETIME_1970 116444736000000000ull /* seconds between 1/1/1601 and 1/1/1970 */
13 #define HECTONANOSEC_PER_SEC 10000000ull
14
15 int getntptimeofday (struct timespec *, struct timezone *);
16
getntptimeofday(struct timespec * tp,struct timezone * z)17 int getntptimeofday (struct timespec *tp, struct timezone *z)
18 {
19 int res = 0;
20 union {
21 unsigned long long ns100; /*time since 1 Jan 1601 in 100ns units */
22 FILETIME ft;
23 } _now;
24 TIME_ZONE_INFORMATION TimeZoneInformation;
25 DWORD tzi;
26
27 if (z != NULL)
28 {
29 if ((tzi = GetTimeZoneInformation(&TimeZoneInformation)) != TIME_ZONE_ID_INVALID) {
30 z->tz_minuteswest = TimeZoneInformation.Bias;
31 if (tzi == TIME_ZONE_ID_DAYLIGHT)
32 z->tz_dsttime = 1;
33 else
34 z->tz_dsttime = 0;
35 }
36 else
37 {
38 z->tz_minuteswest = 0;
39 z->tz_dsttime = 0;
40 }
41 }
42
43 if (tp != NULL) {
44 GetSystemTimeAsFileTime (&_now.ft); /* 100-nanoseconds since 1-1-1601 */
45 /* The actual accuracy on XP seems to be 125,000 nanoseconds = 125 microseconds = 0.125 milliseconds */
46 _now.ns100 -= FILETIME_1970; /* 100 nano-seconds since 1-1-1970 */
47 tp->tv_sec = _now.ns100 / HECTONANOSEC_PER_SEC; /* seconds since 1-1-1970 */
48 tp->tv_nsec = (long) (_now.ns100 % HECTONANOSEC_PER_SEC) * 100; /* nanoseconds */
49 }
50 return res;
51 }
52
gettimeofday(struct timeval * p,void * z)53 int __cdecl gettimeofday (struct timeval *p, void *z)
54 {
55 struct timespec tp;
56
57 if (getntptimeofday (&tp, (struct timezone *) z))
58 return -1;
59 p->tv_sec=tp.tv_sec;
60 p->tv_usec=(tp.tv_nsec/1000);
61 return 0;
62 }
63
mingw_gettimeofday(struct timeval * p,struct timezone * z)64 int __cdecl mingw_gettimeofday (struct timeval *p, struct timezone *z)
65 {
66 struct timespec tp;
67
68 if (getntptimeofday (&tp, z))
69 return -1;
70 p->tv_sec=tp.tv_sec;
71 p->tv_usec=(tp.tv_nsec/1000);
72 return 0;
73 }
74