Megatest

;;======================================================================
;; db access stuff
;;======================================================================

;; call with dbinit=db:initialize-main-db
;;
(define (db:open-db dbstruct run-id dbinit)
  (mutex-lock! *db-open-mutex*)
  ;; (mutex-lock! *db-open-mutex*)
  (let* ((dbdat (dbfile:open-db dbstruct run-id dbinit)))
    (set! *db-write-access* (not (dbr:dbdat-read-only dbdat)))
    (mutex-unlock! *db-open-mutex*)
    ;; (mutex-unlock! *db-open-mutex*)
    dbdat))

(define dbfile:db-init-proc (make-parameter #f))

;; (db:with-db dbstruct run-id sqlite3:exec "select blah fgrom blaz;")
;; r/w is a flag to indicate if the db is modified by this query #t = yes, #f = no
;;

    (if (file-exists? jfile)
	(begin
	  (dbfile:print-err "INFO: "jfile" exists, delaying to reduce database load")
	  (thread-sleep! 0.2)))
    (if (and use-mutex
	     (common:low-noise-print 120 "over-50-parallel-api-requests"))
	(dbfile:print-err *api-process-request-count* " parallel api requests being processed in process "
			  (current-process-id) ", throttling access"))
			  (current-process-id))) ;;  ", throttling access"))
    (condition-case
	(begin
	  (if use-mutex (mutex-lock! *db-with-db-mutex*))
	  (let ((res (apply proc dbdat db params))) ;; the actual call is here.
	    (if use-mutex (mutex-unlock! *db-with-db-mutex*))
	    ;; (if (vector? dbstruct)(db:done-with dbstruct run-id r/w))
	    (if dbdat