pool_hdr_t
pool->a = ocs_array_alloc(os, size + sizeof(pool_hdr_t), count);
ocs_list_init(&pool->freelist, pool_hdr_t, link);
ocs_list_init(&pool->freelist, pool_hdr_t, link);
ocs_memset(ocs_pool_get_instance(pool, i), 0, size - sizeof(pool_hdr_t));
pool_hdr_t *h;
pool_hdr_t *h;
h = &((pool_hdr_t*)item)[-1];
pool_hdr_t *h = ocs_array_get(pool->a, idx);