[7589] | 1 | <?php |
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| 2 | /*********************************************** |
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| 3 | * File : simplemutex.php |
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| 4 | * Project : Z-Push |
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| 5 | * Descr : Implements a simple mutex using InterProcessData |
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| 6 | * |
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| 7 | * Created : 29.02.2012 |
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| 8 | * |
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| 9 | * Copyright 2007 - 2012 Zarafa Deutschland GmbH |
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| 10 | * |
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| 11 | * This program is free software: you can redistribute it and/or modify |
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| 12 | * it under the terms of the GNU Affero General Public License, version 3, |
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| 13 | * as published by the Free Software Foundation with the following additional |
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| 14 | * term according to sec. 7: |
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| 15 | * |
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| 16 | * According to sec. 7 of the GNU Affero General Public License, version 3, |
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| 17 | * the terms of the AGPL are supplemented with the following terms: |
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| 18 | * |
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| 19 | * "Zarafa" is a registered trademark of Zarafa B.V. |
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| 20 | * "Z-Push" is a registered trademark of Zarafa Deutschland GmbH |
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| 21 | * The licensing of the Program under the AGPL does not imply a trademark license. |
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| 22 | * Therefore any rights, title and interest in our trademarks remain entirely with us. |
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| 23 | * |
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| 24 | * However, if you propagate an unmodified version of the Program you are |
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| 25 | * allowed to use the term "Z-Push" to indicate that you distribute the Program. |
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| 26 | * Furthermore you may use our trademarks where it is necessary to indicate |
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| 27 | * the intended purpose of a product or service provided you use it in accordance |
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| 28 | * with honest practices in industrial or commercial matters. |
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| 29 | * If you want to propagate modified versions of the Program under the name "Z-Push", |
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| 30 | * you may only do so if you have a written permission by Zarafa Deutschland GmbH |
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| 31 | * (to acquire a permission please contact Zarafa at trademark@zarafa.com). |
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| 32 | * |
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| 33 | * This program is distributed in the hope that it will be useful, |
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| 34 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 35 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 36 | * GNU Affero General Public License for more details. |
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| 37 | * |
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| 38 | * You should have received a copy of the GNU Affero General Public License |
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| 39 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
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| 40 | * |
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| 41 | * Consult LICENSE file for details |
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| 42 | ************************************************/ |
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| 43 | |
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| 44 | class SimpleMutex extends InterProcessData { |
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| 45 | /** |
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| 46 | * Constructor |
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| 47 | */ |
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| 48 | public function SimpleMutex() { |
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| 49 | // initialize super parameters |
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| 50 | $this->allocate = 64; |
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| 51 | $this->type = 5173; |
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| 52 | parent::__construct(); |
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| 53 | |
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| 54 | if (!$this->IsActive()) { |
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| 55 | 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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| 56 | } |
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| 57 | } |
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| 58 | |
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| 59 | /** |
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| 60 | * Blocks the mutex |
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| 61 | * Method blocks until mutex is available! |
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| 62 | * ATTENTION: make sure that you *always* release a blocked mutex! |
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| 63 | * |
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| 64 | * @access public |
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| 65 | * @return boolean |
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| 66 | */ |
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| 67 | public function Block() { |
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| 68 | if ($this->IsActive()) |
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| 69 | return $this->blockMutex(); |
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| 70 | |
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| 71 | ZLog::Write(LOGLEVEL_WARN, "Could not enter mutex as InterProcessData is not available. This is not recommended on duty systems and may result in corrupt user/device linking!"); |
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| 72 | return true; |
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| 73 | } |
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| 74 | |
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| 75 | /** |
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| 76 | * Releases the mutex |
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| 77 | * After the release other processes are able to block the mutex themselfs |
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| 78 | * |
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| 79 | * @access public |
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| 80 | * @return boolean |
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| 81 | */ |
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| 82 | public function Release() { |
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| 83 | if ($this->IsActive()) |
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| 84 | return $this->releaseMutex(); |
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| 85 | |
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| 86 | return true; |
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| 87 | } |
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| 88 | } |
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| 89 | ?> |
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