Attachment 221726 Details for Bug 252820 – timerfd+epoll+LT

timerfd+epoll+LT

timerfd.c (text/plain), 1.40 KB, created by shu on 2021-01-19 06:44:19 UTC

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Creator: shu

Created: 2021-01-19 06:44:19 UTC

Size: 1.40 KB

patch

obsolete

>#include <stdio.h>
>#include <string.h>
>#include <time.h>
>#include <unistd.h>
>
>#include <sys/epoll.h>
>#include <sys/timerfd.h>
>
>void
>main()
>{
>    struct epoll_event ev;
>    struct epoll_event evs[16];
>	struct itimerspec its;
>    struct timespec t;
>	unsigned long long v;
>    int efd, tfd, n, i, interval = 5;
>
>    tfd = timerfd_create(CLOCK_MONOTONIC, 0);
>    if (tfd < 0){
>        perror("timerfd_create() error");
>		return;
>    }
>
>    if (clock_gettime(CLOCK_MONOTONIC, &t) != 0){
>        perror("clock_gettime() error");
>        return;
>    }
>
>    its.it_value.tv_sec = t.tv_sec + interval;
>    its.it_value.tv_nsec = 0;
>    its.it_interval.tv_sec = interval;
>    its.it_interval.tv_nsec = 0;
>
>    if (timerfd_settime(tfd, TFD_TIMER_ABSTIME, &its, NULL) != 0) {
>        perror("timerfd_settime() error");
>        return;
>    }
>
>    efd = epoll_create1(0);
>    if (efd < 0){
>        perror("epoll_create1() error");
>        return;
>    }
>
>    ev.events = EPOLLIN;
>    if (epoll_ctl(efd, EPOLL_CTL_ADD, tfd, &ev) != 0){
>        perror("epoll_ctl() error");
>        return;
>    }
>
>    while(1) {
>        n = epoll_wait(efd, evs, 16, -1);
>        if (n == -1){
>            perror("epoll_wait() error");
>            break;
>        } else if(n == 0){
>            break;
>        }
>        for (i = 0; i < n; i++){
>			printf("get timer\n");
>			memset(&its, 0, sizeof(its));	
>			timerfd_settime(tfd, TFD_TIMER_ABSTIME, &its, NULL);
>		}
>	}
>}

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Attachments on bug 252820: 221726