pool_put
#define pool_put(pp, rp) free((rp), 0, 0)
#define pool_put(pp, rp) free((rp), 0, 0)
pool_put(struct pool *pp, void *v)
#define pool_put(pool, item) free(item)
pool_put(struct pool *pp, void *p)
#define pool_put(p, a) free(a)