static void sigHandFun(int signum)

{

    struct itimerval itv;

    itv.it_interval.tv_sec  = 5;

    itv.it_interval.tv_usec = 0;

    itv.it_value.tv_sec  = 0;

    itv.it_value.tv_usec = 0;

    setitimer(ITIMER_REAL, &itv, NULL);

}

static int init_timer_to_set_wake_lock(void)

{

    struct itimerval itv;

    if (SIG_ERR == signal(SIGALRM, sigHandFun)) {

        perror("signal");

        return -1;

    }

    itv.it_interval.tv_sec  = 5;

    itv.it_interval.tv_usec = 0;

    itv.it_value.tv_sec  = 5;

    itv.it_value.tv_usec = 0;

    if (-1 == setitimer(ITIMER_REAL, &itv, NULL)) {

        perror("setitimer");

        return -1;

    }

    return 0;

}