Megatest

  (db:with-lock-db dbfile
		(lambda (dbh dbfile)
		  (db:get-iam-server-lock dbh dbfile))))

(define (db:with-lock-db dbfile proc)
  (let* ((dbh (db:open-run-db dbfile db:initialize-db))
	 (res (proc dbh dbfile)))
    (sqlite3:finalize! dbh)
    ;; (sqlite3:finalize! dbh)
    res))

;; called before db is open?
;;
(define (db:get-iam-server-lock dbh dbfname)
  (sqlite3:with-transaction
   dbh

			    ((and has-last-update
				  (number? last-update))
			     #t) ;; if given a number, just use it for all fields
			    ((and (pair? last-update)
				  (member (car last-update)    ;; last-update field name
					  (map car fields)))
			     #t)
			    ((pair? last-update)
			    ((and (pair? last-update)
				  (not (number? (cdr last-update))))
			     (debug:print 0 *default-log-port* "ERROR: parameter last-update malformed. last-update="last-update)
			     #f)
			    ((and (pair? last-update)
				  (string? (car last-update))) ;; valid format, field not recognised
			     #f)
			    ((number? last-update) #f) ;; if not matched first entry then ignore last-update for this table
			    (last-update
			     (debug:print 0 *default-log-port* "ERROR: parameter last-update for db:sync-tables must be a pair or a number, received: " last-update);; found in fields
			     #f)
			    (else
			     #f)))
	 (last-update-value (if use-last-update ;; no need to check for has-last-update - it is already accounted for