43 lines
1.2 KiB
C
43 lines
1.2 KiB
C
#include <machine/syscall.h>
|
|
#include <sys/types.h>
|
|
#include <sys/times.h>
|
|
#include <sys/time.h>
|
|
#include "internal_syscall.h"
|
|
|
|
extern int _gettimeofday(struct timeval *, void *);
|
|
|
|
/* Timing information for current process. From
|
|
newlib/libc/include/sys/times.h the tms struct fields are as follows:
|
|
|
|
- clock_t tms_utime : user clock ticks
|
|
- clock_t tms_stime : system clock ticks
|
|
- clock_t tms_cutime : children's user clock ticks
|
|
- clock_t tms_cstime : children's system clock ticks
|
|
|
|
Since maven does not currently support processes we set both of the
|
|
children's times to zero. Eventually we might want to separately
|
|
account for user vs system time, but for now we just return the total
|
|
number of cycles since starting the program. */
|
|
clock_t
|
|
_times(struct tms *buf)
|
|
{
|
|
static char initialized;
|
|
static struct timeval t0;
|
|
struct timeval t;
|
|
|
|
_gettimeofday (&t, 0);
|
|
|
|
// when called for the first time, initialize t0
|
|
if (!initialized) {
|
|
t0.tv_sec = t.tv_sec;
|
|
t0.tv_usec = t.tv_usec;
|
|
initialized = 1;
|
|
}
|
|
|
|
long long utime = (t.tv_sec - t0.tv_sec) * 1000000 + (t.tv_usec - t0.tv_usec);
|
|
buf->tms_utime = utime * CLOCKS_PER_SEC / 1000000;
|
|
buf->tms_stime = buf->tms_cstime = buf->tms_cutime = 0;
|
|
|
|
return buf->tms_utime;
|
|
}
|