READLOCK2
READLOCK2(table, NULL, "r table db_mindex::prepare_results", this);
READLOCK2(table, DB_LOCK_ERROR, "r table db_mindex::first", this);
READLOCK2(table, DB_LOCK_ERROR, "r db_mindex::next", this);
READLOCK2(table, DB_LOCK_ERROR, "r table db_mindex::first", this);
READLOCK2(table, DB_LOCK_ERROR, "r table db_mindex::next", this);