Function rk_randomseed

numpy/random/src/mt19937/randomkit.c:169–202

}

rk_error rk_randomseed(rk_state *state) {
#ifndef _WIN32
  struct timeval tv;
#else
  struct _timeb tv;
#endif
  int i;

  if (rk_devfill(state->key, sizeof(state->key), 0) == RK_NOERR) {
    /* ensures non-zero key */
    state->key[0] |= 0x80000000UL;
    state->pos = RK_STATE_LEN;
    state->gauss = 0;
    state->has_gauss = 0;
    state->has_binomial = 0;

    for (i = 0; i < 624; i++) {
      state->key[i] &= 0xffffffffUL;
    }
    return RK_NOERR;
  }

#ifndef _WIN32
  gettimeofday(&tv, NULL);
  rk_seed(rk_hash(getpid()) ^ rk_hash(tv.tv_sec) ^ rk_hash(tv.tv_usec) ^
              rk_hash(clock()),
          state);
#else
  _FTIME(&tv);
  rk_seed(rk_hash(tv.time) ^ rk_hash(tv.millitm) ^ rk_hash(clock()), state);
#endif

  return RK_ENODEV;
}

/* Magic Mersenne Twister constants */
#define N 624