Here are the data structures with brief descriptions:

qb_hdb
qb_hdb_handle
qb_ipc_request_header
qb_ipc_response_header
qb_ipcs_connection_stats
qb_ipcs_connection_stats_2
qb_ipcs_poll_handlers
qb_ipcs_service_handlers
qb_ipcs_stats
qb_list_head
qb_log_callsite	An instance of this structure is created in a special ELF section at every dynamic debug callsite
qb_log_ctl2_arg_t