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