ucx/cx/collection.h

Wed, 30 Oct 2024 15:15:36 +0100

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Wed, 30 Oct 2024 15:15:36 +0100
branch
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changeset 375
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parent 324
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1 /*
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2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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3 *
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4 * Copyright 2023 Mike Becker, Olaf Wintermann All rights reserved.
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5 *
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6 * Redistribution and use in source and binary forms, with or without
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7 * modification, are permitted provided that the following conditions are met:
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8 *
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9 * 1. Redistributions of source code must retain the above copyright
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10 * notice, this list of conditions and the following disclaimer.
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11 *
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12 * 2. Redistributions in binary form must reproduce the above copyright
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13 * notice, this list of conditions and the following disclaimer in the
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14 * documentation and/or other materials provided with the distribution.
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15 *
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16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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26 * POSSIBILITY OF SUCH DAMAGE.
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27 */
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28 /**
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29 * \file collection.h
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30 * \brief Common definitions for various collection implementations.
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31 * \author Mike Becker
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32 * \author Olaf Wintermann
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33 * \copyright 2-Clause BSD License
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34 */
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35
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36 #ifndef UCX_COLLECTION_H
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37 #define UCX_COLLECTION_H
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38
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39 #include "allocator.h"
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40 #include "iterator.h"
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41 #include "compare.h"
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42
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43 #ifdef __cplusplus
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44 extern "C" {
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45 #endif
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46
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47 /**
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48 * Special constant used for creating collections that are storing pointers.
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49 */
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50 #define CX_STORE_POINTERS 0
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51
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52 /**
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53 * Base attributes of a collection.
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54 */
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55 struct cx_collection_s {
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56 /**
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57 * The allocator to use.
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58 */
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59 const CxAllocator *allocator;
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60 /**
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61 * The comparator function for the elements.
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62 */
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63 cx_compare_func cmpfunc;
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64 /**
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65 * The size of each element.
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66 */
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67 size_t elem_size;
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68 /**
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69 * The number of currently stored elements.
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70 */
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71 size_t size;
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72 /**
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73 * An optional simple destructor for the collection's elements.
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74 *
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75 * @attention Read the documentation of the particular collection implementation
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76 * whether this destructor shall only destroy the contents or also free the memory.
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77 */
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78 cx_destructor_func simple_destructor;
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79 /**
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80 * An optional advanced destructor for the collection's elements.
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81 *
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82 * @attention Read the documentation of the particular collection implementation
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83 * whether this destructor shall only destroy the contents or also free the memory.
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84 */
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85 cx_destructor_func2 advanced_destructor;
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86 /**
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87 * The pointer to additional data that is passed to the advanced destructor.
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88 */
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89 void *destructor_data;
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90 /**
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91 * Indicates if this list is supposed to store pointers
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92 * instead of copies of the actual objects.
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93 */
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94 bool store_pointer;
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95 };
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96
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97 /**
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98 * Use this macro to declare common members for a collection structure.
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99 */
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100 #define CX_COLLECTION_BASE struct cx_collection_s collection
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101
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102 /**
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103 * Sets a simple destructor function for this collection.
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104 *
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105 * @param c the collection
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106 * @param destr the destructor function
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107 */
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108 #define cxDefineDestructor(c, destr) \
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109 (c)->collection.simple_destructor = (cx_destructor_func) destr
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110
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111 /**
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112 * Sets a simple destructor function for this collection.
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113 *
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114 * @param c the collection
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115 * @param destr the destructor function
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116 */
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117 #define cxDefineAdvancedDestructor(c, destr, data) \
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118 (c)->collection.advanced_destructor = (cx_destructor_func2) destr; \
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119 (c)->collection.destructor_data = data
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120
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121 /**
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122 * Invokes the simple destructor function for a specific element.
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123 *
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124 * Usually only used by collection implementations. There should be no need
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125 * to invoke this macro manually.
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126 *
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127 * @param c the collection
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128 * @param e the element
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129 */
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130 #define cx_invoke_simple_destructor(c, e) \
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131 (c)->collection.simple_destructor((c)->collection.store_pointer ? (*((void **) (e))) : (e))
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132
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133 /**
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134 * Invokes the advanced destructor function for a specific element.
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135 *
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136 * Usually only used by collection implementations. There should be no need
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137 * to invoke this macro manually.
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138 *
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139 * @param c the collection
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140 * @param e the element
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141 */
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142 #define cx_invoke_advanced_destructor(c, e) \
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143 (c)->collection.advanced_destructor((c)->collection.destructor_data, \
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144 (c)->collection.store_pointer ? (*((void **) (e))) : (e))
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145
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146
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147 /**
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148 * Invokes all available destructor functions for a specific element.
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149 *
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150 * Usually only used by collection implementations. There should be no need
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151 * to invoke this macro manually.
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152 *
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153 * @param c the collection
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154 * @param e the element
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155 */
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156 #define cx_invoke_destructor(c, e) \
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157 if ((c)->collection.simple_destructor) cx_invoke_simple_destructor(c,e); \
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158 if ((c)->collection.advanced_destructor) cx_invoke_advanced_destructor(c,e)
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159
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160 #ifdef __cplusplus
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Olaf Wintermann <olaf.wintermann@gmail.com>
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161 } // extern "C"
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Olaf Wintermann <olaf.wintermann@gmail.com>
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162 #endif
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Olaf Wintermann <olaf.wintermann@gmail.com>
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163
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Olaf Wintermann <olaf.wintermann@gmail.com>
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164 #endif // UCX_COLLECTION_H

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