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;; Copyright 2006-2013, Matthew Welland.
;;
;; This program is made available under the GNU GPL version 2.0 or
;; greater. See the accompanying file COPYING for details.
;; This file is part of Megatest.
;;
;; Megatest is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;;
;; Megatest is distributed in the hope that it will be useful,
;; This program is distributed WITHOUT ANY WARRANTY; without even the
;; implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
;; PURPOSE.
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;;
;; You should have received a copy of the GNU General Public License
;; along with Megatest. If not, see <http://www.gnu.org/licenses/>.
;;
(use sqlite3 srfi-18)
(import (prefix sqlite3 sqlite3:))
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(define (lock-queue:delete-lock-db dbdat)
(let ((fname (lock-queue:db-dat-get-path dbdat)))
(system (conc "rm -f " fname "*"))))
(define (lock-queue:open-db fname #!key (count 10))
(let* ((actualfname (conc fname ".lockdb"))
(dbexists (file-exists? actualfname))
(dbexists (common:file-exists? actualfname))
(db (sqlite3:open-database actualfname))
(handler (make-busy-timeout 136000)))
(if dbexists
(vector db actualfname)
(begin
(handle-exceptions
exn
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(lock-queue:release-lock fname test-id count: (- count 1)))
(let ((journal (conc fname "-journal")))
;; If we've tried ten times and failed there is a serious problem
;; try to remove the lock db and allow it to be recreated
(handle-exceptions
exn
#f
(if (file-exists? journal)(delete-file journal))
(if (file-exists? fname) (delete-file fname))
(if (common:file-exists? journal)(delete-file journal))
(if (common:file-exists? fname) (delete-file fname))
#f))))
(sqlite3:execute (lock-queue:db-dat-get-db dbdat) "DELETE FROM runlocks WHERE test_id=?;" test-id)
(sqlite3:finalize! (lock-queue:db-dat-get-db dbdat)))))
(define (lock-queue:steal-lock dbdat test-id #!key (count 10))
(debug:print-info 0 *default-log-port* "Attempting to steal lock at " (lock-queue:db-dat-get-path dbdat))
(tasks:wait-on-journal (lock-queue:db-dat-get-path dbdat) 1200 "lock-queue:steal-lock; waiting on journal")
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