source: rtems/cpukit/score/src/timespecsubtract.c @ 25f5730f

4.11
Last change on this file since 25f5730f was c499856, checked in by Chris Johns <chrisj@…>, on Mar 20, 2014 at 9:10:47 PM

Change all references of rtems.com to rtems.org.

  • Property mode set to 100644
File size: 902 bytes
Line 
1/**
2 *  @file  score/src/timespecsubtract.c
3 *
4 *  @brief Subtract Two Timespec
5 *  @ingroup Timespec
6 */
7
8/*
9 *  COPYRIGHT (c) 1989-2007.
10 *  On-Line Applications Research Corporation (OAR).
11 *
12 *  The license and distribution terms for this file may be
13 *  found in the file LICENSE in this distribution or at
14 *  http://www.rtems.org/license/LICENSE.
15 */
16
17#if HAVE_CONFIG_H
18#include "config.h"
19#endif
20
21#include <rtems/score/timespec.h>
22#include <rtems/score/todimpl.h>
23
24void _Timespec_Subtract(
25  const struct timespec *start,
26  const struct timespec *end,
27  struct timespec       *result
28)
29{
30
31  if (end->tv_nsec < start->tv_nsec) {
32    result->tv_sec  = end->tv_sec - start->tv_sec - 1;
33    result->tv_nsec =
34      (TOD_NANOSECONDS_PER_SECOND - start->tv_nsec) + end->tv_nsec;
35  } else {
36    result->tv_sec  = end->tv_sec - start->tv_sec;
37    result->tv_nsec = end->tv_nsec - start->tv_nsec;
38  }
39}
Note: See TracBrowser for help on using the repository browser.