easy way to handle non-block tcp socket

static result_t __non_block_connect_process(void *sock)
{
    tcp_sock_t *tcp_sock = (tcp_sock_t *)sock;
    result_t rc        = E_OK;
    struct sockaddr_in addr;
    LOGT(C_TCP_THREAD_TAG, "Enter");
    iport_to_sockaddr_in(&tcp_sock->dst_iport, &addr);

    if (connect(tcp_sock->sockfd, (struct sockaddr*)&addr, sizeof(struct sockaddr)) < 0) {
/* TBD */
#if !defined(MYS_WINDOWS_PLATFORM)
        if (EISCONN == errno) {
            LOGD(C_TCP_THREAD_TAG, "non_block connected");
            if (tcp_sock->on_connected) {
                tcp_sock->on_connected(tcp_sock->connected_arg);
                tcp_sock->non_block_connected = TRUE;
            }
        } else {
            LOGD(C_TCP_THREAD_TAG, "non_block not connected");
        }
#endif
    }

    return E_OK;
}