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/* $OpenBSD: hertz.c,v 1.7 2015/01/16 06:40:08 deraadt Exp $ */ |
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/* |
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* Copyright (c) 2005 Artur Grabowski <art@openbsd.org> |
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* |
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* Permission to use, copy, modify, and distribute this software for any |
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* purpose with or without fee is hereby granted, provided that the above |
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* copyright notice and this permission notice appear in all copies. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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*/ |
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#include <sys/time.h> |
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#include <sys/sysctl.h> |
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#include "gprof.h" |
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/* |
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* Return the tick frequency on the machine or 0 if we can't find out. |
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*/ |
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int |
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hertz(void) |
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{ |
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struct clockinfo cinfo; |
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int mib[2]; |
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size_t len; |
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mib[0] = CTL_KERN; |
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mib[1] = KERN_CLOCKRATE; |
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len = sizeof(cinfo); |
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if (sysctl(mib, 2, &cinfo, &len, NULL, 0) == -1) |
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return (0); |
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return (cinfo.hz); |
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} |