scc

 1#include <time.h>
 2
 3#include <sys.h>
 4
 5#include "time.h"
 6
 7#define TOCLOCK(r) (r.tv_sec * CLOCKS_PER_SEC +\
 8                    r.tv_usec / (1000000 / CLOCKS_PER_SEC))
 9
10struct rusage {
11	struct timeval ru_utime;
12	struct timeval ru_stime;
13	long int ru_maxrss;
14	long int ru_ixrss;
15	long int ru_idrss;
16	long int ru_isrss;
17	long int ru_minflt;
18	long int ru_majflt;
19	long int ru_nswap;
20	long int ru_inblock;
21	long int ru_oublock;
22	long int ru_msgsnd;
23	long int ru_msgrcv;
24	long int ru_nsignals;
25	long int ru_nvcsw;
26	long int ru_nivcsw;
27};
28
29extern int _getrusage(int, struct rusage*);
30
31clock_t
32clock(void)
33{
34	struct rusage ru;
35
36	if (_getrusage(RUSAGE_SELF, &ru))
37		return -1;
38
39	return TOCLOCK(ru.ru_utime) + TOCLOCK(ru.ru_stime);
40}