Bug #24342 » 16749_v2.patch
| t3lib/class.t3lib_abstract_lock.php (revision 0) | ||
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<?php
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/***************************************************************
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* Copyright notice
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*
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* (c) 2008-2010 Michael Stucki (michael@typo3.org)
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* All rights reserved
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*
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* This script is part of the TYPO3 project. The TYPO3 project is
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* free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* The GNU General Public License can be found at
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* http://www.gnu.org/copyleft/gpl.html.
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* A copy is found in the textfile GPL.txt and important notices to the license
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* from the author is found in LICENSE.txt distributed with these scripts.
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*
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*
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* This script is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* This copyright notice MUST APPEAR in all copies of the script!
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***************************************************************/
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/**
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* Class for providing locking features in TYPO3
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*
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* $Id: class.t3lib_lock.php 9758 2010-12-05 11:25:36Z stephenking $
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*
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* @author Michael Stucki <michael@typo3.org>
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*/
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/**
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* TYPO3 locking class
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* This class provides an abstract layer to various locking features for TYPO3
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*
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* It is intended to blocks requests until some data has been generated.
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* This is especially useful if two clients are requesting the same website short after each other. While the request of client 1 triggers building and caching of the website, client 2 will be waiting at this lock.
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*
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* @author Michael Stucki <michael@typo3.org>
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* @package TYPO3
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* @subpackage t3lib
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* @see class.t3lib_tstemplate.php, class.tslib_fe.php
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*/
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class t3lib_abstract_lock {
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protected $method;
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protected $id; // Identifier used for this lock
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protected $resource; // Resource used for this lock (can be a file or a semaphore resource)
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protected $filepointer;
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protected $isAcquired = FALSE;
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protected $destruct=FALSE; // destroy all resources on destruct
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protected $loops = 150; // Number of times a locked resource is tried to be acquired. This is only used by manual locks like the "simple" method.
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protected $step = 200; // Milliseconds after lock acquire is retried. $loops * $step results in the maximum delay of a lock. Only used by manual locks like the "simple" method.
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/**
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* Constructor:
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* initializes locking, check input parameters and set variables accordingly.
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*
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* @param string ID to identify this lock in the system
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* @param string Define which locking method to use. Defaults to "simple".
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* @param integer Number of times a locked resource is tried to be acquired. This is only used by manual locks like the "simple" method.
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* @param integer Milliseconds after lock acquire is retried. $loops * $step results in the maximum delay of a lock. Only used by manual locks like the "simple" method.
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* @return boolean Returns true unless something went wrong
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*/
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public function __construct($id, $method = '', $loops = 0, $step = 0) {
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// Input checks
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$id = (string) $id; // Force ID to be string
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if (intval($loops)) {
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$this->loops = intval($loops);
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}
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if (intval($step)) {
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$this->step = intval($step);
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}
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// Detect locking method
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if (in_array($method, array('disable', 'simple', 'flock', 'semaphore'))) {
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$this->method = $method;
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} else {
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throw new Exception('No such method "' . $method . '"');
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}
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$success = FALSE;
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switch ($this->method) {
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case 'simple':
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case 'flock':
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$path = PATH_site . 'typo3temp/locks/';
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if (!is_dir($path)) {
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t3lib_div::mkdir($path);
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}
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$this->id = md5($id);
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$this->resource = $path . $this->id;
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$success = TRUE;
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break;
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case 'semaphore':
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$this->id = abs(crc32($id));
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if (($this->resource = sem_get($this->id, 1)) == TRUE) {
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$success = TRUE;
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}
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break;
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case 'disable':
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return FALSE;
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break;
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}
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return $success;
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}
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/**
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* Destructor:
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* Releases lock automatically when instance is destroyed.
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*
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* @return void
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*/
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function __destruct() {
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$this->destruct=TRUE;
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$this->release();
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}
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/**
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* Acquire a lock and return when successful. If the lock is already open, the client will be
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*
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* It is important to know that the lock will be acquired in any case, even if the request was blocked first. Therefore, the lock needs to be released in every situation.
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*
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* @return boolean Returns true if lock could be acquired without waiting, false otherwise.
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*/
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public function acquire() {
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$this->isAcquired = FALSE;
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return FALSE;
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}
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/**
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* Release the lock
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*
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* @return boolean Returns TRUE on success or FALSE on failure
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*/
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public function release() {
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return TRUE;
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}
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/**
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* Return the locking method which is currently used
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*
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* @return string Locking method
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*/
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public function getMethod() {
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return $this->method;
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}
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/**
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* Return the ID which is currently used
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*
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* @return string Locking ID
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*/
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public function getId() {
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return $this->id;
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}
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/**
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* Return the resource which is currently used.
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* Depending on the locking method this can be a filename or a semaphore resource.
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*
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* @return mixed Locking resource (filename as string or semaphore as resource)
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*/
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public function getResource() {
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return $this->resource;
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}
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/**
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* Return the status of a lock
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*
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* @return string Returns TRUE if lock is acquired, FALSE otherwise
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*/
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public function getLockStatus() {
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return $this->isAcquired;
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}
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/**
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* Adds a common log entry for this locking API using t3lib_div::sysLog().
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* Example: 25-02-08 17:58 - cms: Locking [simple::0aeafd2a67a6bb8b9543fb9ea25ecbe2]: Acquired
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*
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* @param string $message: The message to be logged
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* @param integer $severity: Severity - 0 is info (default), 1 is notice, 2 is warning, 3 is error, 4 is fatal error
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* @return void
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*/
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public function sysLog($message, $severity = 0) {
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t3lib_div::sysLog('Locking [' . $this->method . '::' . $this->id . ']: ' . trim($message), 'cms', $severity);
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}
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}
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if (defined('TYPO3_MODE') && isset($GLOBALS['TYPO3_CONF_VARS'][TYPO3_MODE]['XCLASS']['t3lib/class.t3lib_abstract_lock.php'])) {
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include_once($GLOBALS['TYPO3_CONF_VARS'][TYPO3_MODE]['XCLASS']['t3lib/class.t3lib_abstract_lock.php']);
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}
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?>
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| t3lib/class.t3lib_lock.php (working copy) | ||
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* @subpackage t3lib
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* @see class.t3lib_tstemplate.php, class.tslib_fe.php
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*/
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class t3lib_lock {
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protected $method;
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protected $id; // Identifier used for this lock
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protected $resource; // Resource used for this lock (can be a file or a semaphore resource)
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protected $filepointer;
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protected $isAcquired = FALSE;
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protected $loops = 150; // Number of times a locked resource is tried to be acquired. This is only used by manual locks like the "simple" method.
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protected $step = 200; // Milliseconds after lock acquire is retried. $loops * $step results in the maximum delay of a lock. Only used by manual locks like the "simple" method.
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class t3lib_lock extends t3lib_abstract_lock {
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/**
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* Constructor:
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* initializes locking, check input parameters and set variables accordingly.
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| ... | ... | |
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* @return boolean Returns true unless something went wrong
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*/
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public function __construct($id, $method = '', $loops = 0, $step = 0) {
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// Input checks
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$id = (string) $id; // Force ID to be string
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if (intval($loops)) {
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$this->loops = intval($loops);
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parent::__construct($id,$method,$loops,$step);
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$this->initLockLock($method,$loops,$step);
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}
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public function initLockLock($method,$loops,$step) {
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if (!$GLOBALS['lockLock'] || !($GLOBALS['lockLock'] instanceof t3lib_lock_static)) {
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$GLOBALS['lockLock']=t3lib_div::makeInstance('t3lib_lock_static','lockLock',$method,$loops,$step);
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}
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if (intval($step)) {
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$this->step = intval($step);
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}
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// Detect locking method
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if (in_array($method, array('disable', 'simple', 'flock', 'semaphore'))) {
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$this->method = $method;
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} else {
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throw new Exception('No such method "' . $method . '"');
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}
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$success = FALSE;
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switch ($this->method) {
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case 'simple':
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case 'flock':
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$path = PATH_site . 'typo3temp/locks/';
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if (!is_dir($path)) {
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t3lib_div::mkdir($path);
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}
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$this->id = md5($id);
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$this->resource = $path . $this->id;
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$success = TRUE;
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break;
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case 'semaphore':
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$this->id = abs(crc32($id));
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if (($this->resource = sem_get($this->id, 1)) == TRUE) {
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$success = TRUE;
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}
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break;
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case 'disable':
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return FALSE;
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break;
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}
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return $success;
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}
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/**
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* Destructor:
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* Releases lock automatically when instance is destroyed.
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*
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* @return void
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*/
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function __destruct() {
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$this->release();
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}
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/**
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* Acquire a lock and return when successful. If the lock is already open, the client will be
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*
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* It is important to know that the lock will be acquired in any case, even if the request was blocked first. Therefore, the lock needs to be released in every situation.
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| ... | ... | |
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$this->sysLog('Waiting for a different process to release the lock');
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$maxExecutionTime = ini_get('max_execution_time');
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$maxAge = time() - ($maxExecutionTime ? $maxExecutionTime : 120);
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if (@filectime($this->resource) < $maxAge) {
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@unlink($this->resource);
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$this->sysLog('Unlink stale lockfile');
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if ($GLOBALS['lockLock']->acquire() || $GLOBALS['lockLock']->getLockStatus()){
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if (@filectime($this->resource) < $maxAge) {
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@unlink($this->resource);
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$this->sysLog('Unlink stale lockfile');
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}
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}
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$GLOBALS['lockLock']->release();
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}
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$isAcquired = FALSE;
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| ... | ... | |
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$filepointer = @fopen($this->resource, 'x');
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if ($filepointer !== FALSE) {
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fclose($filepointer);
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$this->sysLog('Lock aquired');
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$this->sysLog('Lock acquired');
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$noWait = ($i === 0);
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$isAcquired = TRUE;
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break;
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| ... | ... | |
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}
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break;
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case 'semaphore':
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$this->sysLog('Acquire semaphore ' . $this->id );
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if (sem_acquire($this->resource)) {
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// Unfortunately it seems not possible to find out if the request was blocked, so we return FALSE in any case to make sure the operation is tried again.
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$noWait = FALSE;
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| ... | ... | |
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* @return boolean Returns TRUE on success or FALSE on failure
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*/
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public function release() {
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if (!$this->isAcquired) {
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if (!$this->isAcquired&& !$this->destruct) {
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return TRUE;
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}
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$success = TRUE;
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switch ($this->method) {
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case 'simple':
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if (unlink($this->resource) == FALSE) {
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if ($GLOBALS['lockLock']->acquire() || $GLOBALS['lockLock']->getLockStatus()){
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switch ($this->method) {
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case 'simple':
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if (unlink($this->resource) == FALSE) {
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$success = FALSE;
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}
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break;
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case 'flock':
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if (flock($this->filepointer, LOCK_UN) == FALSE) {
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$success = FALSE;
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}
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fclose($this->filepointer);
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unlink($this->resource);
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break;
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case 'semaphore':
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if (@sem_release($this->resource)) {
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sem_remove($this->resource);
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} else {
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$success = FALSE;
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}
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break;
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case 'disable':
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$success = FALSE;
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}
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break;
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case 'flock':
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if (flock($this->filepointer, LOCK_UN) == FALSE) {
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$success = FALSE;
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}
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fclose($this->filepointer);
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unlink($this->resource);
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break;
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case 'semaphore':
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if (@sem_release($this->resource)) {
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sem_remove($this->resource);
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} else {
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$success = FALSE;
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}
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break;
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case 'disable':
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$success = FALSE;
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break;
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break;
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}
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}
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$GLOBALS['lockLock']->release();
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$this->isAcquired = FALSE;
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return $success;
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}
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/**
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* Return the locking method which is currently used
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*
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* @return string Locking method
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*/
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public function getMethod() {
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return $this->method;
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}
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/**
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* Return the ID which is currently used
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*
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* @return string Locking ID
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*/
|
||
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public function getId() {
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return $this->id;
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}
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||
|
/**
|
||
|
* Return the resource which is currently used.
|
||
|
* Depending on the locking method this can be a filename or a semaphore resource.
|
||
|
*
|
||
|
* @return mixed Locking resource (filename as string or semaphore as resource)
|
||
|
*/
|
||
|
public function getResource() {
|
||
|
return $this->resource;
|
||
|
}
|
||
|
/**
|
||
|
* Return the status of a lock
|
||
|
*
|
||
|
* @return string Returns TRUE if lock is acquired, FALSE otherwise
|
||
|
*/
|
||
|
public function getLockStatus() {
|
||
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return $this->isAcquired;
|
||
|
}
|
||
|
/**
|
||
|
* Adds a common log entry for this locking API using t3lib_div::sysLog().
|
||
|
* Example: 25-02-08 17:58 - cms: Locking [simple::0aeafd2a67a6bb8b9543fb9ea25ecbe2]: Acquired
|
||
|
*
|
||
|
* @param string $message: The message to be logged
|
||
|
* @param integer $severity: Severity - 0 is info (default), 1 is notice, 2 is warning, 3 is error, 4 is fatal error
|
||
|
* @return void
|
||
|
*/
|
||
|
public function sysLog($message, $severity = 0) {
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t3lib_div::sysLog('Locking [' . $this->method . '::' . $this->id . ']: ' . trim($message), 'cms', $severity);
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}
|
||
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}
|
||
| t3lib/class.t3lib_lock_static.php (revision 0) | ||
|---|---|---|
|
<?php
|
||
|
/***************************************************************
|
||
|
* Copyright notice
|
||
|
*
|
||
|
* (c) 2008-2010 Michael Stucki (michael@typo3.org)
|
||
|
* All rights reserved
|
||
|
*
|
||
|
* This script is part of the TYPO3 project. The TYPO3 project 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.
|
||
|
*
|
||
|
* The GNU General Public License can be found at
|
||
|
* http://www.gnu.org/copyleft/gpl.html.
|
||
|
* A copy is found in the textfile GPL.txt and important notices to the license
|
||
|
* from the author is found in LICENSE.txt distributed with these scripts.
|
||
|
*
|
||
|
*
|
||
|
* This script is distributed in the hope that it will be useful,
|
||
|
* 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.
|
||
|
*
|
||
|
* This copyright notice MUST APPEAR in all copies of the script!
|
||
|
***************************************************************/
|
||
|
/**
|
||
|
* Class for providing locking features in TYPO3
|
||
|
*
|
||
|
* $Id: class.t3lib_lock.php 9758 2010-12-05 11:25:36Z stephenking $
|
||
|
*
|
||
|
* @author Michael Stucki <michael@typo3.org>
|
||
|
*/
|
||
|
class t3lib_lock_static extends t3lib_abstract_lock {
|
||
|
/**
|
||
|
* Constructor:
|
||
|
* initializes locking, check input parameters and set variables accordingly.
|
||
|
*
|
||
|
* @param string ID to identify this lock in the system
|
||
|
* @param string Define which locking method to use. Defaults to "simple".
|
||
|
* @param integer Number of times a locked resource is tried to be acquired. This is only used by manual locks like the "simple" method.
|
||
|
* @param integer Milliseconds after lock acquire is retried. $loops * $step results in the maximum delay of a lock. Only used by manual locks like the "simple" method.
|
||
|
* @return boolean Returns true unless something went wrong
|
||
|
*/
|
||
|
public function __construct($id, $method = '', $loops = 0, $step = 0) {
|
||
|
$res=parent::__construct($id,$method,$loops,$step);
|
||
|
parent::sysLog("Static semaphore " . $this->id);
|
||
|
return $res;
|
||
|
}
|
||
|
/**
|
||
|
* Acquire a lock and return when successful. If the lock is already open, the client will be
|
||
|
*
|
||
|
* It is important to know that the lock will be acquired in any case, even if the request was blocked first. Therefore, the lock needs to be released in every situation.
|
||
|
*
|
||
|
* @return boolean Returns true if lock could be acquired without waiting, false otherwise.
|
||
|
*/
|
||
|
public function acquire() {
|
||
|
$noWait = TRUE; // Default is TRUE, which means continue without caring for other clients. In the case of TYPO3s cache management, this has no negative effect except some resource overhead.
|
||
|
$isAcquired = TRUE;
|
||
|
switch ($this->method) {
|
||
|
case 'simple':
|
||
|
if (is_file($this->resource)) {
|
||
|
$this->sysLog('Waiting for a different process to release the lock');
|
||
|
$maxExecutionTime = ini_get('max_execution_time');
|
||
|
$maxAge = time() - 3*($maxExecutionTime ? $maxExecutionTime : 120);
|
||
|
if (@filectime($this->resource) < $maxAge) {
|
||
|
@unlink($this->resource);
|
||
|
$this->sysLog('Unlink stale lockfile');
|
||
|
}
|
||
|
}
|
||
|
$isAcquired = FALSE;
|
||
|
for ($i = 0; $i < $this->loops; $i++) {
|
||
|
$filepointer = @fopen($this->resource, 'x');
|
||
|
if ($filepointer !== FALSE) {
|
||
|
fclose($filepointer);
|
||
|
$this->sysLog('Lock acquired');
|
||
|
$noWait = ($i === 0);
|
||
|
$isAcquired = TRUE;
|
||
|
break;
|
||
|
}
|
||
|
usleep($this->step * 1000);
|
||
|
}
|
||
|
if (!$isAcquired) {
|
||
|
throw new Exception('Lock file could not be created');
|
||
|
}
|
||
|
break;
|
||
|
case 'flock':
|
||
|
if (($this->filepointer = fopen($this->resource, 'w+')) == FALSE) {
|
||
|
throw new Exception('Lock file could not be opened');
|
||
|
}
|
||
|
if (flock($this->filepointer, LOCK_EX | LOCK_NB) == TRUE) { // Lock without blocking
|
||
|
$noWait = TRUE;
|
||
|
} elseif (flock($this->filepointer, LOCK_EX) == TRUE) { // Lock with blocking (waiting for similar locks to become released)
|
||
|
$noWait = FALSE;
|
||
|
} else {
|
||
|
throw new Exception('Could not lock file "' . $this->resource . '"');
|
||
|
}
|
||
|
break;
|
||
|
case 'semaphore':
|
||
|
$this->sysLog('Static semaphore ' . $this->id );
|
||
|
if (sem_acquire($this->resource)) {
|
||
|
$this->sysLog('Static semaphore ' . $this->id );
|
||
|
// Unfortunately it seems not possible to find out if the request was blocked, so we return FALSE in any case to make sure the operation is tried again.
|
||
|
$noWait = FALSE;
|
||
|
}
|
||
|
break;
|
||
|
case 'disable':
|
||
|
$noWait = FALSE;
|
||
|
$isAcquired = FALSE;
|
||
|
break;
|
||
|
}
|
||
|
$this->isAcquired = $isAcquired;
|
||
|
return $noWait;
|
||
|
}
|
||
|
/**
|
||
|
* Release the lock
|
||
|
*
|
||
|
* @return boolean Returns TRUE on success or FALSE on failure
|
||
|
*/
|
||
|
public function release() {
|
||
|
$this->sysLog('Release static semaphore ' . $this->id );
|
||
|
if (!$this->isAcquired&& !$this->destruct) {
|
||
|
return TRUE;
|
||
|
}
|
||
|
$success = TRUE;
|
||
|
switch ($this->method) {
|
||
|
case 'simple':
|
||
|
if (unlink($this->resource) == FALSE) {
|
||
|
$success = FALSE;
|
||
|
}
|
||
|
break;
|
||
|
case 'flock':
|
||
|
if (flock($this->filepointer, LOCK_UN) == FALSE) {
|
||
|
$success = FALSE;
|
||
|
}
|
||
|
fclose($this->filepointer);
|
||
|
break;
|
||
|
case 'semaphore':
|
||
|
$this->sysLog('Release static semaphore ' . $this->id );
|
||
|
if (@sem_release($this->resource)) {
|
||
|
} else {
|
||
|
$success = FALSE;
|
||
|
}
|
||
|
break;
|
||
|
case 'disable':
|
||
|
$success = FALSE;
|
||
|
break;
|
||
|
}
|
||
|
$this->isAcquired = FALSE;
|
||
|
return $success;
|
||
|
}
|
||
|
}
|
||
|
if (defined('TYPO3_MODE') && isset($GLOBALS['TYPO3_CONF_VARS'][TYPO3_MODE]['XCLASS']['t3lib/class.t3lib_lock_static.php'])) {
|
||
|
include_once($GLOBALS['TYPO3_CONF_VARS'][TYPO3_MODE]['XCLASS']['t3lib/class.t3lib_lock_static.php']);
|
||
|
}
|
||
|
?>
|
||
| t3lib/core_autoload.php (working copy) | ||
|---|---|---|
|
$t3libClasses = array(
|
||
|
'gzip_encode' => PATH_t3lib . 'class.gzip_encode.php',
|
||
|
't3lib_abstract_lock' => PATH_t3lib . 'class.t3lib_abstract_lock.php',
|
||
|
't3lib_admin' => PATH_t3lib . 'class.t3lib_admin.php',
|
||
|
't3lib_ajax' => PATH_t3lib . 'class.t3lib_ajax.php',
|
||
|
't3lib_arraybrowser' => PATH_t3lib . 'class.t3lib_arraybrowser.php',
|
||
| ... | ... | |
|
't3lib_loaddbgroup' => PATH_t3lib . 'class.t3lib_loaddbgroup.php',
|
||
|
't3lib_loadmodules' => PATH_t3lib . 'class.t3lib_loadmodules.php',
|
||
|
't3lib_lock' => PATH_t3lib . 'class.t3lib_lock.php',
|
||
|
't3lib_lock_static' => PATH_t3lib . 'class.t3lib_lock_static.php',
|
||
|
't3lib_matchcondition' => PATH_t3lib . 'class.t3lib_matchcondition.php',
|
||
|
't3lib_message_abstractmessage' => PATH_t3lib . 'message/class.t3lib_message_abstractmessage.php',
|
||
|
't3lib_message_errorpagemessage' => PATH_t3lib . 'message/class.t3lib_message_errorpagemessage.php',
|
||
| ... | ... | |
|
't3lib_tceformsinlinehook' => PATH_t3lib . 'interfaces/interface.t3lib_tceformsinlinehook.php',
|
||
|
't3lib_tcemain_checkmodifyaccesslisthook' => PATH_t3lib . 'interfaces/interface.t3lib_tcemain_checkmodifyaccesslisthook.php',
|
||
|
't3lib_tcemain_processuploadhook' => PATH_t3lib . 'interfaces/interface.t3lib_tcemain_processuploadhook.php',
|
||
|
't3lib_mail_mboxtransport' => PATH_t3lib . 'mail/class.t3lib_mail_mboxtransport.php',
|
||
|
't3lib_mail_mboxtransport' => PATH_t3lib . 'mail/class.t3lib_mail_mboxtransport.php',
|
||
|
't3lib_mail_message' => PATH_t3lib . 'mail/class.t3lib_mail_message.php',
|
||
|
't3lib_mail_mailer' => PATH_t3lib . 'mail/class.t3lib_mail_mailer.php',
|
||
|
'tx_t3lib_mail_hooks' => PATH_t3lib . 'mail/class.tx_t3lib_mail_hooks.php',
|
||