Megatest

;; currently the primary job of the watchdog is to run the sync back to megatest.db from the db in /tmp
;; if we are on the homehost and we are a server (by definition we are on the homehost if we are a server)
;;


(define (common:readonly-watchdog dbstruct)
  (thread-sleep! 0.05) ;; delay for startup

  (BB> "common:readonly-watchdog entered.")
  ;; sync megatest.db to /tmp/.../megatst.db
  (let ((sync-cool-off-duration   3)
        (golden-mtdb     (dbr:dbstruct-mtdb dbstruct))
        (golden-mtpath   (db:dbdat-get-path mtdb))
        (tmp-mtdb        (dbr:dbstruct-tmpdb dbstruct))
        (tmp-mtpath      (db:dbdat-get-path mtdb)))
    (debug:print-info 0 *default-log-port* "Read-only periodic sync thread started.")
    (let loop ((last-sync-time 0))
      (BB> "loop top tmp-mtpath="tmp-mtpath" golden-mtpath="golden-mtpath)
      (let* ((duration-since-last-sync (- (current-seconds) last-sync-time)))
        (BB> "duration-since-last-sync="duration-since-last-sync)
        (if (and (not *time-to-exit*)
                 (< duration-since-last-sync sync-cool-off-duration))
            (thread-sleep! (- sync-cool-off-duration duration-since-last-sync)))
        (if (not *time-to-exit*)
            (let ((golden-mtdb-mtime (file-modification-time golden-mtpath))
                  (tmp-mtdb-mtime    (file-modification-time tmp-mtpath)))
              (if (> golden-mtdb-mtime tmp-mtdb-mtime)

			(delay-loop (+ count 1))))
		  (if (not *time-to-exit*) (loop))))
	    (if (common:low-noise-print 30)
		(debug:print-info 0 *default-log-port* "Exiting watchdog timer, *time-to-exit* = " *time-to-exit*" pid="(current-process-id)" this-wd-num="this-wd-num)))))))

;; TODO: for multiple areas, we will have multiple watchdogs; and multiple threads to manage
(define (common:watchdog)
  (BB> "common:watchdog entered.")
  (let ((dbstruct (db:setup)))
    (if (dbr:dbstruct-read-only dbstruct)
        (common:readonly-watchdog dbstruct)
        (common:writable-watchdog dbstruct))))


(define (std-exit-procedure)

(if (not (launch:setup))
    (begin
      (print "Failed to find megatest.config, exiting") 
      (exit 1)))

;; create a watch dog to move changes from lt/.db/*.db to megatest.db
;;
(if (file-write-access? (conc *toppath* "/megatest.db"))
;;;(if (file-write-access? (conc *toppath* "/megatest.db"))
    (thread-start! (make-thread common:watchdog "Watchdog thread"))
    (if (not (args:get-arg "-use-db-cache"))
	(begin
	  (debug:print-info 0 *default-log-port* "Forcing db-cache mode due to read-only access to megatest.db")
	  (hash-table-set! args:arg-hash "-use-db-cache" #t))))
	  (hash-table-set! args:arg-hash "-use-db-cache" #t)));;;)

;; data common to all tabs goes here
;;
(defstruct dboard:commondat
  ((curr-tab-num 0) : number)
  please-update  
  tabdats