用epoll实现毫秒sleep

#include <sys/epoll.h>
#include <sys/time.h>
#include <unistd.h>
#include <stdio.h>

int test(){
        struct epoll_event;
        int epfd;
        struct timeval tv;
        epfd=epoll_create(1);
        while(1){
                int nfds = epoll_wait(epfd, NULL, 1, 1000);
                gettimeofday(&tv , NULL);

                printf("%d hahaha\n", tv.tv_sec);
        }
}
int main(){

test();

}