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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