48 lines
1.7 KiB
C
48 lines
1.7 KiB
C
/*
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* Copyright (c) 1989 The Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that: (1) source distributions retain this entire copyright
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* notice and comment, and (2) distributions including binaries display
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* the following acknowledgement: ``This product includes software
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* developed by the University of California, Berkeley and its contributors''
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* in the documentation or other materials provided with the distribution
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* and in all advertising materials mentioning features or use of this
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* software. Neither the name of the University nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "@(#)clock.c 5.3 (Berkeley) 6/1/90";
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#endif /* LIBC_SCCS and not lint */
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#define _KERNEL
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#include "ixemul.h"
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#include <machine/limits.h>
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#include <time.h>
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#include <sys/resource.h>
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clock_t clock(void)
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{
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struct rusage rusage;
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clock_t val;
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if (syscall (SYS_getrusage, RUSAGE_SELF, &rusage))
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return ((clock_t) -1);
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val = (rusage.ru_utime.tv_sec + rusage.ru_stime.tv_sec) * CLK_TCK;
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/*
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* Convert usec to clock ticks; could do (usec * CLK_TCK) / 1000000,
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* but this would overflow if we switch to nanosec.
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*/
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val += (rusage.ru_utime.tv_usec + rusage.ru_stime.tv_usec) /
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(1000000 / CLK_TCK);
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return (val);
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}
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