1 /*
2 * ptw32_timespec.c
3 *
4 * Description:
5 * This translation unit implements routines which are private to
6 * the implementation and may be used throughout it.
7 *
8 * --------------------------------------------------------------------------
9 *
10 * Pthreads-win32 - POSIX Threads Library for Win32
11 * Copyright(C) 1998 John E. Bossom
12 * Copyright(C) 1999,2005 Pthreads-win32 contributors
13 *
14 * Contact Email: rpj@callisto.canberra.edu.au
15 *
16 * The current list of contributors is contained
17 * in the file CONTRIBUTORS included with the source
18 * code distribution. The list can also be seen at the
19 * following World Wide Web location:
20 * http://sources.redhat.com/pthreads-win32/contributors.html
21 *
22 * This library is free software; you can redistribute it and/or
23 * modify it under the terms of the GNU Lesser General Public
24 * License as published by the Free Software Foundation; either
25 * version 2 of the License, or (at your option) any later version.
26 *
27 * This library is distributed in the hope that it will be useful,
28 * but WITHOUT ANY WARRANTY; without even the implied warranty of
29 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
30 * Lesser General Public License for more details.
31 *
32 * You should have received a copy of the GNU Lesser General Public
33 * License along with this library in the file COPYING.LIB;
34 * if not, write to the Free Software Foundation, Inc.,
35 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
36 */
37
38 #include "pthread.h"
39 #include "implement.h"
40
41
42 #if defined(NEED_FTIME)
43
44 /*
45 * time between jan 1, 1601 and jan 1, 1970 in units of 100 nanoseconds
46 */
47 #define PTW32_TIMESPEC_TO_FILETIME_OFFSET \
48 ( ((int64_t) 27111902 << 32) + (int64_t) 3577643008 )
49
50 INLINE void
ptw32_timespec_to_filetime(const struct timespec * ts,FILETIME * ft)51 ptw32_timespec_to_filetime (const struct timespec *ts, FILETIME * ft)
52 /*
53 * -------------------------------------------------------------------
54 * converts struct timespec
55 * where the time is expressed in seconds and nanoseconds from Jan 1, 1970.
56 * into FILETIME (as set by GetSystemTimeAsFileTime), where the time is
57 * expressed in 100 nanoseconds from Jan 1, 1601,
58 * -------------------------------------------------------------------
59 */
60 {
61 *(int64_t *) ft = ts->tv_sec * 10000000
62 + (ts->tv_nsec + 50) / 100 + PTW32_TIMESPEC_TO_FILETIME_OFFSET;
63 }
64
65 INLINE void
ptw32_filetime_to_timespec(const FILETIME * ft,struct timespec * ts)66 ptw32_filetime_to_timespec (const FILETIME * ft, struct timespec *ts)
67 /*
68 * -------------------------------------------------------------------
69 * converts FILETIME (as set by GetSystemTimeAsFileTime), where the time is
70 * expressed in 100 nanoseconds from Jan 1, 1601,
71 * into struct timespec
72 * where the time is expressed in seconds and nanoseconds from Jan 1, 1970.
73 * -------------------------------------------------------------------
74 */
75 {
76 ts->tv_sec =
77 (int) ((*(int64_t *) ft - PTW32_TIMESPEC_TO_FILETIME_OFFSET) / 10000000);
78 ts->tv_nsec =
79 (int) ((*(int64_t *) ft - PTW32_TIMESPEC_TO_FILETIME_OFFSET -
80 ((int64_t) ts->tv_sec * (int64_t) 10000000)) * 100);
81 }
82
83 #endif /* NEED_FTIME */
84