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Diffstat (limited to 'ptw32_timespec.c')
| -rw-r--r-- | ptw32_timespec.c | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/ptw32_timespec.c b/ptw32_timespec.c new file mode 100644 index 0000000..dedcc75 --- /dev/null +++ b/ptw32_timespec.c @@ -0,0 +1,81 @@ +/* + * ptw32_timespec.c + * + * Description: + * This translation unit implements routines which are private to + * the implementation and may be used throughout it. + * + * -------------------------------------------------------------------------- + * + * Pthreads-win32 - POSIX Threads Library for Win32 + * Copyright(C) 1998 John E. Bossom + * Copyright(C) 1999,2002 Pthreads-win32 contributors + * + * Contact Email: rpj@ise.canberra.edu.au + * + * The current list of contributors is contained + * in the file CONTRIBUTORS included with the source + * code distribution. The list can also be seen at the + * following World Wide Web location: + * http://sources.redhat.com/pthreads-win32/contributors.html + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library in the file COPYING.LIB; + * if not, write to the Free Software Foundation, Inc., + * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA + */ + +#include "pthread.h" +#include "implement.h" + + +#ifdef NEED_FTIME + +/* + * time between jan 1, 1601 and jan 1, 1970 in units of 100 nanoseconds + */ +#define PTW32_TIMESPEC_TO_FILETIME_OFFSET \ + ( ((LONGLONG) 27111902 << 32) + (LONGLONG) 3577643008 ) + +INLINE void +ptw32_timespec_to_filetime(const struct timespec *ts, FILETIME *ft) + /* + * ------------------------------------------------------------------- + * converts struct timespec + * where the time is expressed in seconds and nanoseconds from Jan 1, 1970. + * into FILETIME (as set by GetSystemTimeAsFileTime), where the time is + * expressed in 100 nanoseconds from Jan 1, 1601, + * ------------------------------------------------------------------- + */ +{ + *(LONGLONG *)ft = ts->tv_sec * 10000000 + + (ts->tv_nsec + 50) / 100 + + PTW32_TIMESPEC_TO_FILETIME_OFFSET; +} + +INLINE void +ptw32_filetime_to_timespec(const FILETIME *ft, struct timespec *ts) + /* + * ------------------------------------------------------------------- + * converts FILETIME (as set by GetSystemTimeAsFileTime), where the time is + * expressed in 100 nanoseconds from Jan 1, 1601, + * into struct timespec + * where the time is expressed in seconds and nanoseconds from Jan 1, 1970. + * ------------------------------------------------------------------- + */ +{ + ts->tv_sec = (int)((*(LONGLONG *)ft - PTW32_TIMESPEC_TO_FILETIME_OFFSET) / 10000000); + ts->tv_nsec = (int)((*(LONGLONG *)ft - PTW32_TIMESPEC_TO_FILETIME_OFFSET - ((LONGLONG)ts->tv_sec * (LONGLONG)10000000)) * 100); +} + +#endif /* NEED_FTIME */ |