struct ev_ct *ev_ct_new(int maxfdhint, int type) {
  unsigned i;
  struct ev_ct *ct;
  const struct ev_method *em;
  int maxfd;
  const char *method;

  ev_gettime();
  ct = (struct ev_ct *) calloc(1, sizeof(struct ev_ct));
  if (!ct)
    return errno = ENOMEM, (struct ev_ct*)0;
  ct->qfd = -1;
  i = 0;
  if (maxfdhint <= 0)
    maxfdhint = ev_fdlimit();
  maxfdhint = ARR_ROUND(maxfdhint);
  method = getenv("EV_METHOD");
  if (method || !type)
    type = 0xffff;
#ifdef ENOTSUP
  errno = ENOTSUP;
#else
  errno = ENOENT;
#endif
  for(;;) {
    em = &methods[i];
    if ((em->type & type) && (!method || strcmp(method, em->name) == 0)) {
      maxfd = em->maxfd && em->maxfd < maxfdhint ?
        em->maxfd : maxfdhint;
      if (em->init(ct, maxfd) == 0)
        break;
    }
    if (++i < sizeof(methods)/sizeof(methods[0]))
      continue;
    free(ct);
    return NULL;
  }

  ct->efd = (struct ev_fd *)calloc(maxfd, sizeof(struct ev_fd));
  if (!ct->efd) {
    if (ct->qfd >= 0) close(ct->qfd);
#if HAVE_POLL
    if (ct->pfd) free(ct->pfd);
#endif
    free(ct);
    errno = ENOMEM;
    return NULL;
  }