libc-top-half/musl/src/time/clock.c

   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 }