mirror of
https://github.com/MariaDB/server.git
synced 2025-12-07 17:42:39 +03:00
ba3d58ad4c
As part of the SPATIAL INDEX implementation in InnoDB, dict_index_t was expanded by a rtr_ssn_t field. There are only 3 operations for this field, all protected by rtr_ssn_t::mutex: * btr_cur_search_to_nth_level() stores the least significant 32 bits of the 64-bit value that is stored in the index root page. (This would better be done when the table is opened for the very first time.) * rtr_get_new_ssn_id() increments the value by 1. * rtr_get_current_ssn_id() reads the current value. All these operations can be implemented equally safely by using atomic memory access operations.