source: lib/gettimeofday.c @ 29760bc

4.0.1-hotfixescachetimestampsdevelopdpdk-ndagetsilivendag_formatrc-4.0.1rc-4.0.2rc-4.0.3rc-4.0.4ringdecrementfixringperformanceringtimestampfixes
Last change on this file since 29760bc was ee6e802, checked in by Shane Alcock <salcock@…>, 5 years ago

Updated copyright blurb on all source files

In some cases, this meant adding copyright blurbs to files that
had never had them before.

  • Property mode set to 100644
File size: 2.1 KB
Line 
1/*
2 *
3 * Copyright (c) 2007-2016 The University of Waikato, Hamilton, New Zealand.
4 * All rights reserved.
5 *
6 * This file is part of libtrace.
7 *
8 * This code has been developed by the University of Waikato WAND
9 * research group. For further information please see http://www.wand.net.nz/
10 *
11 * libtrace is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU Lesser General Public License as published by
13 * the Free Software Foundation; either version 3 of the License, or
14 * (at your option) any later version.
15 *
16 * libtrace is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
19 * GNU Lesser General Public License for more details.
20 *
21 * You should have received a copy of the GNU Lesser General Public License
22 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
23 *
24 *
25 */
26#include <time.h>
27
28#ifndef _FILETIME_
29#define _FILETIME_
30typedef struct _FILETIME
31{
32    DWORD dwLowDateTime;
33    DWORD dwHighDateTime;
34} FILETIME;
35#endif
36
37#ifdef _MSC_VER
38#define EPOCHFILETIME (116444736000000000i64)
39#else
40#define EPOCHFILETIME (116444736000000000LL)
41#endif
42
43struct timezone {
44        int tz_minuteswest; /* minutes W of Greenwich */
45        int tz_dsttime;         /* type of dst correction */
46};
47
48
49int gettimeofday(struct timeval *tv, struct timezone *tz)
50{
51    FILETIME        ft;
52    LARGE_INTEGER   li;
53    __int64         t;
54    static int      tzflag;
55
56    if (tv)
57    {
58        GetSystemTimeAsFileTime(&ft);
59        li.LowPart  = ft.dwLowDateTime;
60        li.HighPart = ft.dwHighDateTime;
61        t  = li.QuadPart;       /* In 100-nanosecond intervals */
62        t -= EPOCHFILETIME;     /* Offset to the Epoch time */
63        t /= 10;                /* In microseconds */
64        tv->tv_sec  = (long)(t / 1000000);
65        tv->tv_usec = (long)(t % 1000000);
66    }
67
68    if (tz)
69    {
70        if (!tzflag)
71        {
72            _tzset();
73            tzflag++;
74        }
75        tz->tz_minuteswest = _timezone / 60;
76        tz->tz_dsttime = _daylight;
77    }
78
79    return 0;
80}
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