• APR_RING_ENTRY() : apr_bucket , apr_json_kv_t , apr_json_value_t , apr_mmap_t , simple_timer_t , timer_event_t , waiter_t
• APR_RING_HEAD() : apr_bucket_brigade , apr_json_array_t , apr_json_object_t , apr_thread_cond_t , fd_queue_t , h2_blist , simple_core_t
• STACK_OF() : modssl_ctx_t , modssl_pk_proxy_t