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/* clktck.c - get the value of CLK_TCK. */
/* Copyright (C) 1997 Free Software Foundation, Inc.
This file is part of GNU Bash, the Bourne Again SHell.
Bash is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Bash 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with Bash. If not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <bashtypes.h>
#if defined (HAVE_SYS_PARAM_H)
# include <sys/param.h>
#endif
#if defined (HAVE_UNISTD_H)
# include <unistd.h>
#endif
#if defined (HAVE_LIMITS_H)
# include <limits.h>
#endif
#if !defined (HAVE_SYSCONF) || !defined (_SC_CLK_TCK)
# if !defined (CLK_TCK)
# if defined (HZ)
# define CLK_TCK HZ
# else
# define CLK_TCK 60
# endif
# endif /* !CLK_TCK */
#endif /* !HAVE_SYSCONF && !_SC_CLK_TCK */
long
get_clk_tck ()
{
static long retval = 0;
if (retval != 0)
return (retval);
#if defined (HAVE_SYSCONF) && defined (_SC_CLK_TCK)
retval = sysconf (_SC_CLK_TCK);
#else /* !SYSCONF || !_SC_CLK_TCK */
retval = CLK_TCK;
#endif /* !SYSCONF || !_SC_CLK_TCK */
return (retval);
}
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