Merge branch 'main' into issue-3911issue-3911

1 files changed, 0 insertions, 99 deletions

diff --git a/lib/classes/StudipLock.class.php b/lib/classes/StudipLock.class.php
deleted file mode 100644
index 601db8b..0000000
--- a/lib/classes/StudipLock.class.php
+++ /dev/null
@@ -1,99 +0,0 @@
-<?php
-/**
- * StudipLock.class.php
- * class with methods to perform cooperative advisory locking
- * using the GET_LOCK feature from Mysql
- * https://dev.mysql.com/doc/refman/5.0/en/miscellaneous-functions.html#function_get-lock
- *
- * This program 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 2 of
- * the License, or (at your option) any later version.
- *
- * @author      André Noack <noack@data-quest.de>
- * @copyright   2013 Stud.IP Core-Group
- * @license     http://www.gnu.org/licenses/gpl-2.0.html GPL version 2
- * @category    Stud.IP
-*/
-class StudipLock
-{
-    /**
-     * name of active lock
-     * @var string
-     */
-    private static $current;
-
-    /**
-     * returns the name of the current active lock
-     * @return string name of active lock
-     */
-    public static function getCurrent()
-    {
-        return self::$current;
-    }
-
-    /**
-     * Tries to obtain a lock with a name given by the string $lockname,
-     * using a timeout of $timeout seconds. Returns 1 if the lock was obtained
-     * successfully, 0 if the attempt timed out
-     * (for example, because another client has previously locked the name),
-     * or NULL if an error occurred
-     * If a name has been locked by one client, any request by another client
-     * for a lock with the same name is blocked.
-     *
-     * @param string $lockname
-     * @param number $timeout in seconds
-     * @throws UnexpectedValueException if there is already an active lock
-     * @return integer 1 if the lock was obtained successfully, 0 if the attempt timed out
-     */
-    public static function get($lockname, $timeout = 10)
-    {
-        if (self::$current !== null) {
-            throw new UnexpectedValueException(sprintf(
-                'could not acquire new lock, %s still active',
-                self::$current
-            ));
-        }
-        $ok = DBManager::get()->fetchColumn("SELECT GET_LOCK(?,?)", [self::lockname($lockname), $timeout]);
-        if ($ok) {
-            self::$current = $lockname;
-        }
-        return $ok;
-    }
-
-    /**
-     * check if lock with given name is available
-     *
-     * @param string $lockname
-     * @return integer 1 if lock is available
-     */
-    public static function isFree($lockname)
-    {
-        return DBManager::get()->fetchColumn("SELECT IS_FREE_LOCK(?)", [self::lockname($lockname)]);
-    }
-
-    /**
-     * release the current lock
-     *
-     * @return integer 1 if the lock could be released
-     */
-    public static function release()
-    {
-        if (self::$current) {
-            return DBManager::get()->fetchColumn("SELECT RELEASE_LOCK(?)", [self::lockname(self::$current)]);
-        }
-        return 0;
-    }
-
-    /**
-     * prepends the name of current database to lockname
-     * because locks are server-wide
-     *
-     * @param string $lockname
-     * @return string
-     */
-    public static function lockname($lockname)
-    {
-        return $GLOBALS['DB_STUDIP_DATABASE'] . '_' . $lockname;
-    }
-}