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"SELECT test_id FROM queue WHERE start_time > ?;" mystart)
res))
(define (lock-queue:get-lock db test-id)
(let ((res #f)
(lckqry (sqlite3:prepare db "SELECT test_id,run_lock FROM runlocks WHERE run_lock='locked';"))
(mklckqry (sqlite3:prepare db "INSERT INTO runlocks (test_id,run_lock) VALUES (?,'locked');")))
(let ((result
(handle-exceptions
exn
#f
(sqlite3:with-transaction
db
(lambda ()
(sqlite3:for-each-row (lambda (tid lockstate)
(set! res (list tid lockstate)))
lckqry)
(if res
(if (equal? (car res) test-id)
#t ;; already have the lock
#f)
(begin
(sqlite3:execute mklckqry test-id)
;; if no error handled then return #t for got the lock
#t)))))))
(let loop ((younger-waiting (lock-queue:any-younger? db mystart test-id)))
(if younger-waiting
(begin
;; no need for us to wait. mark in the lock queue db as skipping
(lock-queue:set-state db test-id "skipping")
(begin
;; (sqlite3:finalize! db)
#f)) ;; let the calling process know that nothing needs to be done
(if (lock-queue:get-lock db test-id)
(begin
;; (sqlite3:finalize! db)
#t)
(if (> (- (current-seconds) mystart) 36000) ;; waited too long, steal the lock
(lock-queue:steal-lock db test-id)
(begin
(thread-sleep! 1)
(loop (lock-queue:any-younger? db mystart test-id)))))))))
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