Libevent源码分析—从使用Libevent库开始

#include <stdio.h>
#include <event.h>
#include <time.h>

struct event ev;
struct timeval tv;

void timer_cb(int fd, short event, void *arg)    //回调函数
{
        printf("callback function\n");
        event_add(&ev, &tv);    //重新注册
}

int main()
{
        struct event_base *base = event_init();  //初始化libevent库
        tv.tv_sec = 1;
        tv.tv_usec = 0;

        event_set(&ev, -1, 0, timer_cb, NULL);  //初始化event结构中成员
        event_base_set(base, &ev);
        event_add(&ev, &tv);  //将event添加到events事件链表，注册事件
        event_base_dispatch(base);  //循环、分发事件

        return 0;
}