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annotate engine/core/util/base/singleton.h @ 384:621b062e752d

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Modified the code blocks project files to fit with the new build system. Code blocks now uses scons to build each of the configurations. The python configurations build properly but fail during link with a bunch of undefined references insides of the swig generated dll, not sure why. Also updated the win32-config.py so that it no longer relies on variables defined outside of itself, this was causing code blocks to not be able to build. Updated a couple of the batch scripts so they run properly.
author vtchill@33b003aa-7bff-0310-803a-e67f0ece8222
date Wed, 20 Jan 2010 05:56:18 +0000
parents 90005975cdbb
children
rev   line source
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1 /***************************************************************************
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2 * Copyright (C) 2005-2008 by the FIFE team *
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3 * http://www.fifengine.de *
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4 * This file is part of FIFE. *
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5 * *
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6 * FIFE is free software; you can redistribute it and/or *
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7 * modify it under the terms of the GNU Lesser General Public *
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8 * License as published by the Free Software Foundation; either *
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9 * version 2.1 of the License, or (at your option) any later version. *
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10 * *
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11 * This library is distributed in the hope that it will be useful, *
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
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14 * Lesser General Public License for more details. *
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15 * *
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16 * You should have received a copy of the GNU Lesser General Public *
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17 * License along with this library; if not, write to the *
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18 * Free Software Foundation, Inc., *
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19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA *
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20 ***************************************************************************/
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21
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22 #ifndef FIFE_SINGLETON_H
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23 #define FIFE_SINGLETON_H
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24
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25 #define SINGLEFRIEND(classname) friend class FIFE::StaticSingleton<classname>; classname(); virtual ~classname();
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26
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27 // Standard C++ library includes
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28 #include <cassert>
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29
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30 // 3rd party library includes
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31
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32 // FIFE includes
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33 // These includes are split up in two parts, separated by one empty line
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34 // First block: files included from the FIFE root src directory
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35 // Second block: files included from the same folder
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36 #include "fifeclass.h"
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37
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38 namespace FIFE {
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39
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40 /** The "classic" Singleton.
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41 *
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42 * @see DynamicSingleton
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43 */
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44 template <typename T> class StaticSingleton: public FifeClass {
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45 public:
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46
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47 static T* instance() {
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48 static T inst;
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49 return &inst;
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50 }
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51
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52 protected:
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53
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54 StaticSingleton(): FifeClass() {
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55 }
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56
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57 virtual ~StaticSingleton() {
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58 }
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59
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60 private:
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61 StaticSingleton(const StaticSingleton<T>&): FifeClass() {}
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62 StaticSingleton<T>& operator=(const StaticSingleton<T>&) {
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63 return this;
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64 }
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65
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66 };
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67
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68 /** Another Singleton.
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69 *
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70 * This implementations needs to be created and destroyed explicitly.
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71 * That way the order of construction and destruction is well defined, so we don't
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72 * get those nasty static initialization/destruction order problems.
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73 *
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74 * Engine will create all standard FIFE Singletons when created (just call Engine::instance())
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75 * and destroy them on exit.
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76 *
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77 * Maybe we'll change this one day to use one of those funny NiftyCounter implementations.
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78 *
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79 * @see StaticSingleton
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80 * @see Engine
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81 */
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82 template <typename T> class DynamicSingleton: public FifeClass {
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83 public:
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84 static T* instance() {
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85 assert(m_instance);
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86 return m_instance;
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87 }
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88
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89 DynamicSingleton(): FifeClass() {
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90 assert(!m_instance);
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91 m_instance = static_cast<T*>(this);
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92 }
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93
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94 virtual ~DynamicSingleton() {
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95 m_instance = 0;
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96 }
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97
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98 private:
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99 static T* m_instance;
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100
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101 DynamicSingleton(const DynamicSingleton<T>&): FifeClass() {};
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102 DynamicSingleton<T&> operator=(const DynamicSingleton<T>&) {};
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103
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104 };
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105
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106 template <typename T> T* DynamicSingleton<T>::m_instance = 0;
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107
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108 }//FIFE
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109
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110 #endif