libevent中定时器的使用方法

 

    #include <stdio.h>

    #include <stdlib.h>

    #include <sys/time.h>

    #include <signal.h>

    #include <event2/event.h>

    #include <event2/event_struct.h>



    struct self_tv{

    struct event* timeout;

    struct timeval tv;

    int order;

    };

    void sigroute(int fd, short event, void* arg) {

    struct self_tv* st = (struct self_tv*)arg;

    printf(“%d wake up\n”, st->order);

    st->tv.tv_sec = st->tv.tv_sec + 1;

    evtimer_add(st->timeout, &(st->tv));

    }



    int main()

    {

    struct event_base* eb;

    struct self_tv* st;

    int i=1;

    eb = event_base_new();

    for(i=0;i<=1000;i++) {

    st = (struct self_tv*)malloc(sizeof(struct self_tv));

    st->tv.tv_sec = 5;

    st->tv.tv_usec = 0;

    st->order = i;

    st->timeout = evtimer_new(eb, sigroute, st);

    evtimer_add(st->timeout, &st->tv);

    }

    event_base_dispatch(eb);

    return 0;

    }



     



    libevent的timer定时器在没有指定EV_PERSIST时是一次性事件。。。在回调里都需要再次evtimer_add一次。