Function loop

adapter/syscall/main_stack_epoll_kernel.c:71–143

}

void *loop(void *arg)
{
    /* Wait for events to happen */
    while (!exit_flag) {
        /*
         * If not call alarm_event_sem, and epoll_wait timeout is 0,
         * it can't exit normal, so timeout can't set to 0.
         */
        int nevents = epoll_wait(epfd, events, MAX_EVENTS, -1);
        int i;

        if (nevents <= 0) {
            if (nevents) {
                printf("hello world epoll wait ret %d, errno:%d, %s\n",
                    nevents, errno, strerror(errno));
                break;
            }
            usleep(100);
            //sleep(1);
        }
        //printf("get nevents:%d\n", nevents);

        for (i = 0; i < nevents; ++i) {
            /* Handle new connect */
            if (events[i].data.fd == sockfd || events[i].data.fd == sockfd_kernel) {
                while (1) {
                    int nclientfd = accept(events[i].data.fd, NULL, NULL);
			    printf("accept sockfd(_kernel):%d, nclientfd:%d, errono:%d/%s\n", events[i].data.fd, nclientfd, errno, strerror(errno));
                    if (nclientfd < 0) {
                        break;
                    }

                    /* Add to event list */
                    ev.data.fd = nclientfd;
                    ev.events  = EPOLLIN;
                    if (epoll_ctl(epfd, EPOLL_CTL_ADD, nclientfd, &ev) != 0) {
                        printf("ff_epoll_ctl failed:%d, %s\n",
                            errno, strerror(errno));
                        close(nclientfd);
                        break;
                    }
		    if (events[i].data.fd == sockfd_kernel) {
		    	break;
		    }
                }
            } else {
                if (events[i].events & EPOLLERR ) {
                    /* Simply close socket */
                    epoll_ctl(epfd, EPOLL_CTL_DEL,  events[i].data.fd, NULL);
                    close(events[i].data.fd);
                } else if (events[i].events & EPOLLIN) {
                    char buf[256];
                    size_t readlen = read( events[i].data.fd, buf, sizeof(buf));
                    if(readlen > 0) {
                        size_t writelen = write( events[i].data.fd, html, sizeof(html) - 1);
                        if (writelen < 0){
                            printf("write failed, readlen:%lu, writelen:%lu, :%d, %s\n",
                                readlen, writelen, errno, strerror(errno));