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89 lines
No EOL
3.3 KiB
PHP
89 lines
No EOL
3.3 KiB
PHP
<?php
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/***********************************************
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* File : simplemutex.php
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* Project : Z-Push
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* Descr : Implements a simple mutex using InterProcessData
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*
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* Created : 29.02.2012
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*
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* Copyright 2007 - 2013 Zarafa Deutschland GmbH
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License, version 3,
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* as published by the Free Software Foundation with the following additional
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* term according to sec. 7:
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*
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* According to sec. 7 of the GNU Affero General Public License, version 3,
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* the terms of the AGPL are supplemented with the following terms:
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*
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* "Zarafa" is a registered trademark of Zarafa B.V.
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* "Z-Push" is a registered trademark of Zarafa Deutschland GmbH
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* The licensing of the Program under the AGPL does not imply a trademark license.
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* Therefore any rights, title and interest in our trademarks remain entirely with us.
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*
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* However, if you propagate an unmodified version of the Program you are
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* allowed to use the term "Z-Push" to indicate that you distribute the Program.
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* Furthermore you may use our trademarks where it is necessary to indicate
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* the intended purpose of a product or service provided you use it in accordance
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* with honest practices in industrial or commercial matters.
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* If you want to propagate modified versions of the Program under the name "Z-Push",
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* you may only do so if you have a written permission by Zarafa Deutschland GmbH
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* (to acquire a permission please contact Zarafa at trademark@zarafa.com).
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*
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* This program 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 Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* Consult LICENSE file for details
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************************************************/
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class SimpleMutex extends InterProcessData {
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/**
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* Constructor
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*/
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public function SimpleMutex() {
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// initialize super parameters
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$this->allocate = 64;
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$this->type = 5173;
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parent::__construct();
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if (!$this->IsActive()) {
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ZLog::Write(LOGLEVEL_ERROR, "SimpleMutex not available as InterProcessData is not available. This is not recommended on duty systems and may result in corrupt user/device linking.");
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}
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}
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/**
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* Blocks the mutex
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* Method blocks until mutex is available!
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* ATTENTION: make sure that you *always* release a blocked mutex!
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*
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* @access public
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* @return boolean
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*/
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public function Block() {
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if ($this->IsActive())
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return $this->blockMutex();
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ZLog::Write(LOGLEVEL_WARN, "Could not enter mutex as InterProcessData is not available. This is not recommended on duty systems and may result in corrupt user/device linking!");
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return true;
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}
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/**
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* Releases the mutex
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* After the release other processes are able to block the mutex themselfs
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*
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* @access public
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* @return boolean
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*/
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public function Release() {
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if ($this->IsActive())
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return $this->releaseMutex();
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return true;
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}
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}
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?>
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