137124Sbostic /* 237124Sbostic * Copyright (c) 1989 The Regents of the University of California. 337124Sbostic * All rights reserved. 437124Sbostic * 537124Sbostic * Redistribution and use in source and binary forms are permitted 637124Sbostic * provided that the above copyright notice and this paragraph are 737124Sbostic * duplicated in all such forms and that any documentation, 837124Sbostic * advertising materials, and other materials related to such 937124Sbostic * distribution and use acknowledge that the software was developed 1037124Sbostic * by the University of California, Berkeley. The name of the 1137124Sbostic * University may not be used to endorse or promote products derived 1237124Sbostic * from this software without specific prior written permission. 1337124Sbostic * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 1437124Sbostic * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 1537124Sbostic * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 1637124Sbostic */ 1737124Sbostic 1837124Sbostic #if defined(LIBC_SCCS) && !defined(lint) 19*42195Skarels static char sccsid[] = "@(#)clock.c 5.2 (Berkeley) 05/17/90"; 2037124Sbostic #endif /* LIBC_SCCS and not lint */ 2137124Sbostic 2237124Sbostic #include <machine/machlimits.h> 2337124Sbostic #include <sys/types.h> 2437124Sbostic #include <sys/time.h> 2537124Sbostic #include <sys/resource.h> 2637124Sbostic 2737124Sbostic clock_t 2837124Sbostic clock() 2937124Sbostic { 3037124Sbostic struct rusage rusage; 3137124Sbostic clock_t val; 3237124Sbostic 3337124Sbostic if (getrusage(RUSAGE_SELF, &rusage)) 34*42195Skarels return ((clock_t) -1); 35*42195Skarels val = (rusage.ru_utime.tv_sec + rusage.ru_stime.tv_sec) * CLK_TCK; 36*42195Skarels /* 37*42195Skarels * Convert usec to clock ticks; could do (usec * CLK_TCK) / 1000000, 38*42195Skarels * but this would overflow if we switch to nanosec. 39*42195Skarels */ 40*42195Skarels val += (rusage.ru_utime.tv_usec + rusage.ru_stime.tv_usec) / 41*42195Skarels (1000000 / CLK_TCK); 42*42195Skarels return (val); 4337124Sbostic } 44