source: rtems/cpukit/posix/src/posixtimespecsubtract.c @ 812da54

4.104.114.84.95
Last change on this file since 812da54 was 812da54, checked in by Joel Sherrill <joel.sherrill@…>, on 04/02/07 at 18:23:59

2007-04-02 Joel Sherrill <joel@…>

  • itron/src/itrontime.c, libcsupport/src/gettod.c, posix/include/rtems/posix/time.h, posix/include/rtems/posix/timer.h, posix/src/clockgettime.c, posix/src/clocksettime.c, posix/src/nanosleep.c, posix/src/posixtimespecsubtract.c, posix/src/posixtimespectointerval.c, posix/src/ptimer1.c, posix/src/sleep.c, rtems/Makefile.am, rtems/include/rtems/rtems/clock.h, rtems/include/rtems/rtems/timer.h, rtems/include/rtems/rtems/types.h, rtems/src/clockget.c, rtems/src/clockset.c, rtems/src/clocktodtoseconds.c, rtems/src/clocktodvalidate.c, rtems/src/taskwakewhen.c, score/Makefile.am, score/include/rtems/score/tod.h, score/inline/rtems/score/tod.inl, score/src/coretod.c, score/src/coretodset.c: Convert from Classic API style TOD_Control as fundamental time structure to POSIX struct timespec. Add clock_get_uptime().
  • rtems/src/clockgetuptime.c, score/src/coretodget.c, score/src/coretodgetuptime.c: New files.
  • score/src/coretodtickle.c, score/src/coretodtoseconds.c, score/src/coretodvalidate.c: Removed.
  • Property mode set to 100644
File size: 1.3 KB
Line 
1/*
2 *  $Id$
3 */
4
5#if HAVE_CONFIG_H
6#include "config.h"
7#endif
8
9#include <time.h>
10#include <errno.h>
11
12#include <rtems/system.h>
13#include <rtems/score/isr.h>
14#include <rtems/score/thread.h>
15#include <rtems/score/tod.h>
16
17#include <rtems/seterr.h>
18#include <rtems/posix/time.h>
19
20/*PAGE
21 *
22 *  _POSIX_Timespec_subtract
23 */
24
25void _POSIX_Timespec_subtract(
26  const struct timespec *start,
27  const struct timespec *end,
28  struct timespec *result
29)
30{
31#if 0
32  struct timespec  start_struct = *the_start;
33  struct timespec *start = &start_struct;
34  uint32_t   nsecs_per_sec = TOD_NANOSECONDS_PER_SECOND;
35
36  if (end->tv_nsec < start->tv_nsec) {
37    int seconds = (start->tv_nsec - end->tv_nsec) / nsecs_per_sec + 1;
38    start->tv_nsec -= nsecs_per_sec * seconds;
39    start->tv_sec += seconds;
40  }
41
42  if (end->tv_nsec - start->tv_nsec > nsecs_per_sec) {
43    int seconds = (start->tv_nsec - end->tv_nsec) / nsecs_per_sec;
44    start->tv_nsec += nsecs_per_sec * seconds;
45    start->tv_sec -= seconds;
46  }
47#else
48
49#endif
50
51  if (end->tv_nsec < start->tv_nsec) {
52    result->tv_sec  = end->tv_sec - start->tv_sec - 1;
53    result->tv_nsec = (TOD_NANOSECONDS_PER_SECOND - start->tv_nsec) + end->tv_nsec;
54  } else {
55    result->tv_sec  = end->tv_sec - start->tv_sec;
56    result->tv_nsec = end->tv_nsec - start->tv_nsec;
57  }
58}
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