1/* timespec -- System time interface
2
3   Copyright (C) 2000, 2002, 2004, 2005 Free Software Foundation, Inc.
4
5   This program is free software; you can redistribute it and/or modify
6   it under the terms of the GNU General Public License as published by
7   the Free Software Foundation; either version 2, or (at your option)
8   any later version.
9
10   This program is distributed in the hope that it will be useful,
11   but WITHOUT ANY WARRANTY; without even the implied warranty of
12   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13   GNU General Public License for more details.
14
15   You should have received a copy of the GNU General Public License
16   along with this program; if not, write to the Free Software Foundation,
17   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
18
19#if ! defined TIMESPEC_H
20# define TIMESPEC_H
21
22# include <sys/types.h>
23# if TIME_WITH_SYS_TIME
24#  include <sys/time.h>
25#  include <time.h>
26# else
27#  if HAVE_SYS_TIME_H
28#   include <sys/time.h>
29#  else
30#   include <time.h>
31#  endif
32# endif
33
34# if ! HAVE_STRUCT_TIMESPEC
35/* Some systems don't define this struct, e.g., AIX 4.1, Ultrix 4.3.  */
36struct timespec
37{
38  time_t tv_sec;
39  long tv_nsec;
40};
41# endif
42
43/* Return negative, zero, positive if A < B, A == B, A > B, respectively.
44   Assume the nanosecond components are in range, or close to it.  */
45static inline int
46timespec_cmp (struct timespec a, struct timespec b)
47{
48  return (a.tv_sec < b.tv_sec ? -1
49	  : a.tv_sec > b.tv_sec ? 1
50	  : a.tv_nsec - b.tv_nsec);
51}
52
53# if ! HAVE_DECL_NANOSLEEP
54/* Don't specify a prototype here.  Some systems (e.g., OSF) declare
55   nanosleep with a conflicting one (const-less first parameter).  */
56int nanosleep ();
57# endif
58
59void gettime (struct timespec *);
60int settime (struct timespec const *);
61
62#endif
63