Megatest

(define *passnum*           0) ;; when running track calls to run-tests or similar
(define *write-frequency*   (make-hash-table)) ;; run-id => (vector (current-seconds) 0))
(define *alt-log-file* #f)  ;; used by -log
(define *common:denoise*    (make-hash-table)) ;; for low noise printing

;; DATABASE
(define *dbstruct-db*  #f)
(define *db-stats*            (make-hash-table)) ;; hash of vectors < count duration-total >
(define *db-stats-mutex*      (make-mutex))
(define *db-sync-mutex*       (make-mutex))
(define *db-multi-sync-mutex* (make-mutex))
(define *db-local-sync*       (make-hash-table)) ;; used to record last touch of db
(define *megatest-db*         #f)
(define *last-db-access*      (current-seconds))  ;; update when db is accessed via server
(define *db-write-access*     #t)
(define *inmemdb*             #f)
(define *task-db*             #f) ;; (vector db path-to-db)
(define *db-access-allowed*   #t) ;; flag to allow access
(define *db-access-mutex*     (make-mutex))

;; SERVER
(define *my-client-signature* #f)
(define *transport-type*    'http)
(define *rpc:listener*      #f) ;; if set up for server communication this will hold the tcp port
(define *runremote*         (make-hash-table)) ;; if set up for server communication this will hold <host port>
(define *max-cache-size*    0)

  (set! *test-paths*         (make-hash-table))
  (set! *test-ids*           (make-hash-table))
  (set! *test-info*          (make-hash-table))
  (set! *run-info-cache*     (make-hash-table))
  (set! *env-vars-by-run-id* (make-hash-table))
  (set! *test-id-cache*      (make-hash-table)))

;; Generic string database
(define sdb:qry #f) ;; (make-sdb:qry)) ;;  'init #f)
;; Generic path database
(define *fdb* #f)

;;======================================================================
;; L O C K E R S   A N D   B L O C K E R S 
;;======================================================================

;; block further accesses to databases. Call this before shutting db down
(define (common:db-block-further-queries)
  (mutex-lock! *db-access-mutex*)
  (set! *db-access-allowed* #f)
  (mutex-unlock! *db-access-mutex*))

(define (common:db-access-allowed?)
  (let ((val (begin
	       (mutex-lock! *db-access-mutex*)
	       *db-access-allowed*
	       (mutex-unlock! *db-access-mutex*))))
    val))

;;======================================================================
;; U S E F U L   S T U F F
;;======================================================================

(define (common:low-noise-print waitval . keys)
  (let* ((key      (string-intersperse (map conc keys) "-" ))

	      num-synced)
	    0))))

;; close all opened run-id dbs
(define (db:close-all dbstruct)
  ;; finalize main.db
  (db:sync-touched dbstruct 0 force-sync: #t)
  (common:db-block-further-queries)
  (mutex-lock! *db-sync-mutex*) ;; with this perhaps it isn't necessary to use the block-further-queries mechanism?
  (sqlite3:finalize! (db:get-db dbstruct #f))
  (let* ((local (dbr:dbstruct-get-local dbstruct))
	 (rundb (dbr:dbstruct-get-rundb dbstruct)))
    (if local
	(for-each
	 (lambda (db)
	   (if (sqlite3:database? db)
	       (begin
		 (sqlite3:interrupt! db)
		 (sqlite3:finalize! db #t))))
	 (hash-table-values (dbr:dbstruct-get-locdbs dbstruct))))
    (thread-sleep! 3)
    (if (and rundb
	     (sqlite3:database? rundb))
	(handle-exceptions
	 exn
	 #t ;; (debug:print 0 "WARNING: database files may not have been closed correctly. Consider running -cleanup-db")
	 (sqlite3:interrupt! rundb)
	 (sqlite3:finalize! rundb #t))))
  (mutex-unlock! *db-sync-mutex*))

(define (db:open-inmem-db)
  (let* ((db      (sqlite3:open-database ":memory:"))
	 (handler (make-busy-timeout 3600)))
    (db:initialize-run-id-db db)
    (sqlite3:set-busy-handler! db handler)
    db))

	   (duration      (- (current-milliseconds) start)))
      (rmt:update-db-stats cmd params duration)
      ;; mark this run as dirty if this was a write
      (if (not (member cmd api:read-only-queries))
	  (let ((start-time (current-seconds)))
	    (mutex-lock! *db-multi-sync-mutex*)
	    (let ((last-sync (hash-table-ref/default *db-local-sync* run-id 0)))
	      (if (and (> (- start-time last-sync) 5) ;; every five seconds
		       (common:db-access-allowed?))
		  (begin
		    ;; MOVE THIS TO A THREAD?
		    (db:multi-db-sync (list run-id) 'new2old)
		    (debug:print-info 0 "Sync of newdb to olddb for run-id " run-id " completed in " (- (current-seconds) start-time) " seconds")
		    (hash-table-set! *db-local-sync* run-id start-time))))
	    (mutex-unlock! *db-multi-sync-mutex*)))
      res)))

(define (rmt:send-receive-no-auto-client-setup connection-info cmd run-id params)