Function callout_tick

lib/ff_kern_timeout.c:303–331

}

void
callout_tick(void)
{
    struct callout_cpu *cc;
    int need_softclock;
    int bucket;

    /*
     * Process callouts at a very low cpu priority, so we don't keep the
     * relatively high clock interrupt priority any longer than necessary.
     */
    need_softclock = 0;
    cc = CC_SELF();
    mtx_lock(&cc->cc_lock);
    for (; (cc->cc_softticks - ticks) < 0; cc->cc_softticks++) {
        bucket = cc->cc_softticks & callwheelmask;
        if (!LIST_EMPTY(&cc->cc_callwheel[bucket])) {
            need_softclock = 1;
            break;
        }
    }
    mtx_unlock(&cc->cc_lock);
    /*
     * swi_sched acquires the thread lock, so we don't want to call it
     * with cc_lock held; incorrect locking order.
     */
    if (need_softclock)
        softclock(cc);
}

static struct callout_cpu *
callout_lock(struct callout *c)