61 lines
1.5 KiB
C
61 lines
1.5 KiB
C
/* clktck.c - get the value of CLK_TCK. */
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/* Copyright (C) 1997 Free Software Foundation, Inc.
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This file is part of GNU Bash, the Bourne Again SHell.
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Bash is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Bash is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Bash. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <config.h>
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#include <bashtypes.h>
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#if defined (HAVE_SYS_PARAM_H)
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# include <sys/param.h>
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#endif
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#if defined (HAVE_UNISTD_H)
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# include <unistd.h>
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#endif
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#if defined (HAVE_LIMITS_H)
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# include <limits.h>
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#endif
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#if !defined (HAVE_SYSCONF) || !defined (_SC_CLK_TCK)
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# if !defined (CLK_TCK)
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# if defined (HZ)
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# define CLK_TCK HZ
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# else
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# define CLK_TCK 60
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# endif
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# endif /* !CLK_TCK */
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#endif /* !HAVE_SYSCONF && !_SC_CLK_TCK */
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long
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get_clk_tck ()
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{
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static long retval = 0;
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if (retval != 0)
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return (retval);
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#if defined (HAVE_SYSCONF) && defined (_SC_CLK_TCK)
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retval = sysconf (_SC_CLK_TCK);
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#else /* !SYSCONF || !_SC_CLK_TCK */
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retval = CLK_TCK;
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#endif /* !SYSCONF || !_SC_CLK_TCK */
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return (retval);
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}
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