/usr/include/tao/CSD_ThreadPool/ is in libtao-dev 6.0.1-3.
This file is owned by root:root, with mode 0o755.
..
/usr/include/tao/CSD_ThreadPool/CSD_TP_Cancel_Visitor.h
/usr/include/tao/CSD_ThreadPool/CSD_TP_Cancel_Visitor.inl
/usr/include/tao/CSD_ThreadPool/CSD_TP_Collocated_Asynch_Request.h
/usr/include/tao/CSD_ThreadPool/CSD_TP_Collocated_Asynch_Request.inl
/usr/include/tao/CSD_ThreadPool/CSD_TP_Collocated_Synch_Request.h
/usr/include/tao/CSD_ThreadPool/CSD_TP_Collocated_Synch_Request.inl
/usr/include/tao/CSD_ThreadPool/CSD_TP_Collocated_Synch_With_Server_Request.h
/usr/include/tao/CSD_ThreadPool/CSD_TP_Collocated_Synch_With_Server_Request.inl
/usr/include/tao/CSD_ThreadPool/CSD_TP_Corba_Request.h
/usr/include/tao/CSD_ThreadPool/CSD_TP_Corba_Request.inl
/usr/include/tao/CSD_ThreadPool/CSD_TP_Custom_Asynch_Request.h
/usr/include/tao/CSD_ThreadPool/CSD_TP_Custom_Asynch_Request.inl
/usr/include/tao/CSD_ThreadPool/CSD_TP_Custom_Request.h
/usr/include/tao/CSD_ThreadPool/CSD_TP_Custom_Request.inl
/usr/include/tao/CSD_ThreadPool/CSD_TP_Custom_Request_Operation.h
/usr/include/tao/CSD_ThreadPool/CSD_TP_Custom_Request_Operation.inl
/usr/include/tao/CSD_ThreadPool/CSD_TP_Custom_Synch_Request.h
/usr/include/tao/CSD_ThreadPool/CSD_TP_Custom_Synch_Request.inl
/usr/include/tao/CSD_ThreadPool/CSD_TP_Dispatchable_Visitor.h
/usr/include/tao/CSD_ThreadPool/CSD_TP_Dispatchable_Visitor.inl
/usr/include/tao/CSD_ThreadPool/CSD_TP_Export.h
/usr/include/tao/CSD_ThreadPool/CSD_TP_Queue.h
/usr/include/tao/CSD_ThreadPool/CSD_TP_Queue.inl
/usr/include/tao/CSD_ThreadPool/CSD_TP_Queue_Visitor.h
/usr/include/tao/CSD_ThreadPool/CSD_TP_Queue_Visitor.inl
/usr/include/tao/CSD_ThreadPool/CSD_TP_Remote_Request.h
/usr/include/tao/CSD_ThreadPool/CSD_TP_Remote_Request.inl
/usr/include/tao/CSD_ThreadPool/CSD_TP_Request.h
/usr/include/tao/CSD_ThreadPool/CSD_TP_Request.inl
/usr/include/tao/CSD_ThreadPool/CSD_TP_Servant_State.h
/usr/include/tao/CSD_ThreadPool/CSD_TP_Servant_State.inl
/usr/include/tao/CSD_ThreadPool/CSD_TP_Servant_State_Map.h
/usr/include/tao/CSD_ThreadPool/CSD_TP_Servant_State_Map.inl
/usr/include/tao/CSD_ThreadPool/CSD_TP_Strategy.h
/usr/include/tao/CSD_ThreadPool/CSD_TP_Strategy.inl
/usr/include/tao/CSD_ThreadPool/CSD_TP_Strategy_Factory.h
/usr/include/tao/CSD_ThreadPool/CSD_TP_Synch_Helper.h
/usr/include/tao/CSD_ThreadPool/CSD_TP_Synch_Helper.inl
/usr/include/tao/CSD_ThreadPool/CSD_TP_Task.h
/usr/include/tao/CSD_ThreadPool/CSD_TP_Task.inl
/usr/include/tao/CSD_ThreadPool/CSD_ThreadPool.h