Function loop

example/main_zc.c:138–232

struct ff_zc_mbuf zc_buf;

int loop(void *arg)
{
    /* Wait for events to happen */
    unsigned nevents = ff_kevent(kq, NULL, 0, events, MAX_EVENTS, NULL);
    unsigned i;

    buf_len = sizeof(html) - 1;
    buf_tmp = html;

    for (i = 0; i < nevents; ++i) {
        struct kevent event = events[i];
        int clientfd = (int)event.ident;

        /* Handle disconnect */
        if (event.flags & EV_EOF) {
            /* Simply close socket */
            ff_close(clientfd);
#ifdef INET6
        } else if (clientfd == sockfd || clientfd == sockfd6) {
#else
        } else if (clientfd == sockfd) {
#endif
            int available = (int)event.data;
            do {
                int nclientfd = ff_accept(clientfd, NULL, NULL);
                if (nclientfd < 0) {
                    ff_log(FF_LOG_ERR, FF_LOGTYPE_FSTACK_APP, "ff_accept failed:%d, %s\n", errno,
                        strerror(errno));
                    break;
                }

                /* Add to event list */
                EV_SET(&kevSet, nclientfd, EVFILT_READ, EV_ADD, 0, 0, NULL);

                if(ff_kevent(kq, &kevSet, 1, NULL, 0, NULL) < 0) {
                    ff_log(FF_LOG_ERR, FF_LOGTYPE_FSTACK_APP, "ff_kevent error:%d, %s\n", errno,
                        strerror(errno));
                    return -1;
                }

                available--;
            } while (available);
        } else if (event.filter == EVFILT_READ) {
            char buf[256];
            size_t readlen = ff_read(clientfd, buf, sizeof(buf));
#ifdef FSTACK_ZC_SEND
            int ret = ff_zc_mbuf_get(&zc_buf, buf_len);
            if (ret < 0) {
                ff_log(FF_LOG_ERR, FF_LOGTYPE_FSTACK_APP, "ff_zc_mbuf_get failed, len:%d, errno:%d, %s\n", buf_len, errno, strerror(errno));
                exit(1);
            }

            /* APP can call ff_zc_mbuf_write multi times */
            int len_part = 1440, off, to_write_len;
            for (off = 0; off < buf_len;){
                to_write_len = (buf_len - off) > len_part ? len_part : (buf_len - off);
                 ret = ff_zc_mbuf_write(&zc_buf, (const char *)buf_tmp + off, to_write_len);
                 if (ret != to_write_len) {