pollidxs
pollidxs = 0; pollidxmax = 0;
ev_free (pollidxs);
array_needsize (int, pollidxs, pollidxmax, fd + 1, pollidx_init);
idx = pollidxs [fd];
pollidxs [fd] = idx = pollcnt++;
pollidxs [fd] = -1;
pollidxs [polls [idx].fd] = idx;
VARx(int *, pollidxs) /* maps fds into structure indices */
#define pollidxs ((loop)->pollidxs)