| #include <sys/times.h> |
| #include <sys/time.h> |
| #include <metal/timer.h> |
| #include <errno.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) |
| { |
| int rv; |
| // when called for the first time, initialize t0 |
| static struct timeval t0; |
| if (t0.tv_sec == 0 && t0.tv_usec == 0) |
| _gettimeofday (&t0, 0); |
| |
| struct timeval t; |
| _gettimeofday (&t, 0); |
| |
| unsigned long long timebase; |
| rv = metal_timer_get_timebase_frequency(0, &timebase); |
| if (rv != 0) { |
| return -1; |
| } |
| |
| long long utime = (t.tv_sec - t0.tv_sec) * 1000000 + (t.tv_usec - t0.tv_usec); |
| buf->tms_utime = utime * timebase / 1000000; |
| buf->tms_stime = buf->tms_cstime = buf->tms_cutime = 0; |
| return 0; |
| } |