libevent::事件::定时器2

Posted 2021-02-03 osbreak

 

#define evtimer_new(b, cb, arg)        event_new((b), -1, 0, (cb), (arg))

 

#include <cstdio>
#include <errno.h>
#include <sys/types.h>
#include <event.h>
#include <event2/event.h>
#include <event2/event_struct.h>
#include <event2/event-config.h>
#include <event2/util.h>

void do_timeout(evutil_socket_t fd, short event, void *arg)
{
    printf("do timeout (time: %ld)!
", time(NULL));
}

void create_timeout_event(struct event_base *base)
{
    struct event *ev;
    struct timeval timeout;
　　
    //将事件和event_base绑定
    ev = event_new(base, -1, EV_PERSIST, do_timeout, NULL);
    if (ev) {
        timeout.tv_sec = 5;
        timeout.tv_usec = 0;
        event_add(ev, &timeout);
    }
}

int
main(int argc, char **argv)
{
    struct event_base *base;

    base = event_base_new();

    if (!base) {
        printf("Error: Create an event base error!
");
        return -1;
    }

    create_timeout_event(base);
    event_base_dispatch(base);

    return (0);
}