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 *      59 Temple Place - Suite 330, Boston, MA 02111-1307, 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
50INLINE void
51ptw32_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
65INLINE void
66ptw32_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