blob: 968f3ed33ff0757949bf398569430bcb1c3ae389 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
|
/**
* This file has no copyright assigned and is placed in the Public Domain.
* This file is part of the mingw-w64 runtime package.
* No warranty is given; refer to the file DISCLAIMER.PD within this package.
*/
#include <time.h>
#include <sys/time.h>
#include <sys/timeb.h>
#include <errno.h>
#include <windows.h>
#define FILETIME_1970 116444736000000000ull /* seconds between 1/1/1601 and 1/1/1970 */
#define HECTONANOSEC_PER_SEC 10000000ull
int getntptimeofday (struct timespec *, struct timezone *);
int getntptimeofday (struct timespec *tp, struct timezone *z)
{
int res = 0;
union {
unsigned long long ns100; /*time since 1 Jan 1601 in 100ns units */
FILETIME ft;
} _now;
TIME_ZONE_INFORMATION TimeZoneInformation;
DWORD tzi;
if (z != NULL)
{
if ((tzi = GetTimeZoneInformation(&TimeZoneInformation)) != TIME_ZONE_ID_INVALID) {
z->tz_minuteswest = TimeZoneInformation.Bias;
if (tzi == TIME_ZONE_ID_DAYLIGHT)
z->tz_dsttime = 1;
else
z->tz_dsttime = 0;
}
else
{
z->tz_minuteswest = 0;
z->tz_dsttime = 0;
}
}
if (tp != NULL) {
typedef void (WINAPI * GetSystemTimeAsFileTime_t)(LPFILETIME);
static GetSystemTimeAsFileTime_t GetSystemTimeAsFileTime_p /* = 0 */;
/* Set function pointer during first call */
GetSystemTimeAsFileTime_t get_time =
__atomic_load_n (&GetSystemTimeAsFileTime_p, __ATOMIC_RELAXED);
if (get_time == NULL) {
/* Use GetSystemTimePreciseAsFileTime() if available (Windows 8 or later) */
get_time = (GetSystemTimeAsFileTime_t)(intptr_t) GetProcAddress (
GetModuleHandle ("kernel32.dll"),
"GetSystemTimePreciseAsFileTime"); /* <1us precision on Windows 10 */
if (get_time == NULL)
get_time = GetSystemTimeAsFileTime; /* >15ms precision on Windows 10 */
__atomic_store_n (&GetSystemTimeAsFileTime_p, get_time, __ATOMIC_RELAXED);
}
get_time (&_now.ft); /* 100 nano-seconds since 1-1-1601 */
_now.ns100 -= FILETIME_1970; /* 100 nano-seconds since 1-1-1970 */
tp->tv_sec = _now.ns100 / HECTONANOSEC_PER_SEC; /* seconds since 1-1-1970 */
tp->tv_nsec = (long) (_now.ns100 % HECTONANOSEC_PER_SEC) * 100; /* nanoseconds */
}
return res;
}
int __cdecl gettimeofday (struct timeval *p, void *z)
{
struct timespec tp;
if (getntptimeofday (&tp, (struct timezone *) z))
return -1;
p->tv_sec=tp.tv_sec;
p->tv_usec=(tp.tv_nsec/1000);
return 0;
}
int __cdecl mingw_gettimeofday (struct timeval *p, struct timezone *z)
{
struct timespec tp;
if (getntptimeofday (&tp, z))
return -1;
p->tv_sec=tp.tv_sec;
p->tv_usec=(tp.tv_nsec/1000);
return 0;
}
|
