1 /* Copyright (C) 1999, 2000 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Library General Public License as
6 published by the Free Software Foundation; either version 2 of the
7 License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Library General Public License for more details.
14 You should have received a copy of the GNU Library General Public
15 License along with the GNU C Library; see the file COPYING.LIB. If not,
16 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 Boston, MA 02111-1307, USA. */
24 #ifndef EXTRA_CLOCK_CASES
25 # define EXTRA_CLOCK_CASES
28 /* Get resolution of clock. */
30 clock_getres (clockid_t clock_id
, struct timespec
*res
)
38 long int clk_tck
= sysconf (_SC_CLK_TCK
);
40 if (__builtin_expect (clk_tck
!= -1, 1))
42 /* This implementation assumes that the realtime clock has a
43 resolution higher than 1 second. This is the case for any
44 reasonable implementation. */
46 res
->tv_nsec
= 1000000000 / clk_tck
;