#include <stdio.h>
#include <stdlib.h>
#include <event2/event.h>
#include <event2/event_struct.h>
#include <time.h>

void timeout_cb(int fd, short event, void *arg) {
    printf("run timeout_cb\n");
    struct event *timeout = (struct event*)arg;
    struct timeval tv;
    tv.tv_sec = 2;
    tv.tv_usec = 0;
    // 重新添加定时事件(定时事件触发后默认自动删除)
    event_add(timeout, &tv);
}

int main(int argc, char **argv) {
    struct event_base *base = event_base_new();
    struct event timeout;
    struct timeval tv;
    tv.tv_sec = 2;
    tv.tv_usec = 0;
    event_assign(&timeout, base, -1, 0, timeout_cb, (void*) &timeout);
    event_add(&timeout, &tv);
    event_base_dispatch(base);
}