| 1 | #include <time.h> |
| 2 | #include <limits.h> |
| 3 | |
| 4 | clock_t clock() |
| 5 | { |
| 6 | struct timespec ts; |
| 7 | |
| 8 | if (__clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &ts)) |
| 9 | return -1; |
| 10 | |
| 11 | if (ts.tv_sec > LONG_MAX/1000000 |
| 12 | || ts.tv_nsec/1000 > LONG_MAX-1000000*ts.tv_sec) |
| 13 | return -1; |
| 14 | |
| 15 | return ts.tv_sec*1000000 + ts.tv_nsec/1000; |
| 16 | } |