libevent 事件状态改变

#include <stdio.h>

#include "event2/event.h"

#include <unistd.h>

void stdin_callback(evutil_socket_t fd,short what,void *arg)

{

    char buf[1024];

    struct event* ev = (struct event*)arg;

    printf("stdin_callback start\n");

    int ret  = read(fd,buf,sizeof(buf));

    buf[ret] = '\0';

    printf("buf %s\n",buf);

    printf("stdin_callback end\n");

    event_del(ev);

}

int main()

{

    struct event_base *base = event_base_new();

    struct event *ev0 = event_new(base,STDIN_FILENO,0,NULL.NULL);

    event_assign(ev0,base,STDIN_FILENO,EV_READ|EV_PERSIST,stdin_callback,ev0);

    event_add(ev0,NULL);

    struct event *ev1 = event_new(base,STDIN_FILENO,0,NULL.NULL);

    event_assign(ev1,base,STDIN_FILENO,EV_READ|EV_PERSIST,stdin_callback,ev1);

    event_add(ev1,NULL);

    /*event loop*/

    event_base_dispatch(base);

    event_base_free(base);

    event_free(ev0);

    event_free(ev1);

    return 0;

}