03070 static void recalc_holdtime(struct queue_ent *qe, int newholdtime)
03071 {
03072    int oldvalue;
03073
03074    /* Calculate holdtime using an exponential average */
03075    /* Thanks to SRT for this contribution */
03076    /* 2^2 (4) is the filter coefficient; a higher exponent would give old entries more weight */
03077
03078    ao2_lock(qe->parent);
03079    oldvalue = qe->parent->holdtime;
03080    qe->parent->holdtime = (((oldvalue << 2) - oldvalue) + newholdtime) >> 2;
03081    ao2_unlock(qe->parent);
03082 }