__accept_nonblock

static VALUE
tcp_accept_nonblock(VALUE sock, VALUE ex)
{
    rb_io_t *fptr;
    union_sockaddr from;
    socklen_t len = (socklen_t)sizeof(from);

    GetOpenFile(sock, fptr);
    return rsock_s_accept_nonblock(rb_cTCPSocket, ex, fptr, &from.addr, &len);
}