timming.c

#include <time.h>

static long currentTimeInNs() {
  struct timespec res;
  clock_gettime(CLOCK_MONOTONIC, &res);
  return (res.tv_sec * 1e9) + res.tv_nsec;
}

static long currentTimeInMs(void) {
  struct timespec res;
  clock_gettime(CLOCK_REALTIME, &res);
  return 1000 * res.tv_sec + res.tv_nsec / 1e6;
}