Sun, 27 Nov 2022 13:33:30 +0100
improve daemon startup
parent will wait until daemon is started and returns error code if startup failed
daemon startup log messages will be printed by parent
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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 2021 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 map.h |
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30 | * \brief Interface for map implementations. |
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31 | * \author Mike Becker |
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32 | * \author Olaf Wintermann |
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33 | * \version 3.0 |
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34 | * \copyright 2-Clause BSD License |
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35 | */ |
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36 | |
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37 | #ifndef UCX_MAP_H |
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38 | #define UCX_MAP_H |
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39 | |
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40 | #include "common.h" |
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41 | #include "allocator.h" |
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42 | #include "iterator.h" |
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43 | #include "hash_key.h" |
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44 | |
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45 | #ifdef __cplusplus |
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46 | extern "C" { |
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47 | #endif |
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48 | |
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49 | /** Type for the UCX map. */ |
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50 | typedef struct cx_map_s CxMap; |
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51 | |
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52 | /** Type for a map entry. */ |
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53 | typedef struct cx_map_entry_s CxMapEntry; |
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54 | |
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55 | /** Type for map class definitions. */ |
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56 | typedef struct cx_map_class_s cx_map_class; |
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57 | |
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58 | /** Structure for the UCX map. */ |
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59 | struct cx_map_s { |
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60 | /** The map class definition. */ |
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61 | cx_map_class *cl; |
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62 | /** An allocator that is used for the map elements. */ |
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63 | CxAllocator *allocator; |
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64 | /** The number of elements currently stored. */ |
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65 | size_t size; |
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66 | // TODO: elemsize + a flag if values shall be copied to the map |
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67 | }; |
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68 | |
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69 | /** |
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70 | * The class definition for arbitrary maps. |
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71 | */ |
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72 | struct cx_map_class_s { |
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73 | /** |
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74 | * Deallocates the entire memory. |
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75 | */ |
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76 | __attribute__((__nonnull__)) |
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77 | void (*destructor)(struct cx_map_s *map); |
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78 | |
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79 | /** |
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80 | * Removes all elements. |
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81 | */ |
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82 | __attribute__((__nonnull__)) |
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83 | void (*clear)(struct cx_map_s *map); |
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84 | |
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85 | /** |
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86 | * Add or overwrite an element. |
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87 | */ |
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88 | __attribute__((__nonnull__)) |
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89 | int (*put)( |
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90 | CxMap *map, |
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91 | CxHashKey key, |
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92 | void *value |
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93 | ); |
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94 | |
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95 | /** |
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96 | * Returns an element. |
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97 | */ |
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98 | __attribute__((__nonnull__, __warn_unused_result__)) |
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99 | void *(*get)( |
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100 | CxMap const *map, |
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101 | CxHashKey key |
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102 | ); |
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103 | |
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104 | /** |
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105 | * Removes an element. |
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106 | */ |
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107 | __attribute__((__nonnull__, __warn_unused_result__)) |
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108 | void *(*remove)( |
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109 | CxMap *map, |
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110 | CxHashKey key |
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111 | ); |
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112 | |
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113 | /** |
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114 | * Iterator over the key/value pairs. |
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115 | */ |
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116 | __attribute__((__nonnull__, __warn_unused_result__)) |
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117 | CxIterator (*iterator)(CxMap const *map); |
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118 | |
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119 | /** |
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120 | * Iterator over the keys. |
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121 | */ |
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122 | __attribute__((__nonnull__, __warn_unused_result__)) |
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123 | CxIterator (*iterator_keys)(CxMap const *map); |
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124 | |
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125 | /** |
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126 | * Iterator over the values. |
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127 | */ |
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128 | __attribute__((__nonnull__, __warn_unused_result__)) |
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129 | CxIterator (*iterator_values)(CxMap const *map); |
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130 | |
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131 | /** |
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132 | * Mutating iterator over the key/value pairs. |
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133 | */ |
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134 | __attribute__((__nonnull__, __warn_unused_result__)) |
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135 | CxMutIterator (*mut_iterator)(CxMap *map); |
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136 | |
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137 | /** |
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138 | * Mutating iterator over the keys. |
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139 | */ |
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140 | __attribute__((__nonnull__, __warn_unused_result__)) |
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141 | CxMutIterator (*mut_iterator_keys)(CxMap *map); |
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142 | |
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143 | /** |
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144 | * Mutating iterator over the values. |
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145 | */ |
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146 | __attribute__((__nonnull__, __warn_unused_result__)) |
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147 | CxMutIterator (*mut_iterator_values)(CxMap *map); |
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148 | }; |
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149 | |
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150 | /** |
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151 | * A map entry. |
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152 | */ |
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153 | struct cx_map_entry_s { |
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154 | /** |
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155 | * A pointer to the key. |
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156 | */ |
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157 | CxHashKey const *key; |
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158 | /** |
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159 | * A pointer to the value. |
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160 | */ |
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161 | void *value; |
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162 | }; |
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163 | |
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164 | |
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165 | /** |
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166 | * Deallocates the memory of the specified map. |
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167 | * |
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168 | * @param map the map to be destroyed |
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169 | */ |
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170 | __attribute__((__nonnull__)) |
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171 | static inline void cxMapDestroy(CxMap *map) { |
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172 | // TODO: likely to add auto-free feature for contents in the future |
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173 | map->cl->destructor(map); |
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174 | } |
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175 | |
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176 | |
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177 | /** |
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178 | * Clears a map by removing all elements. |
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179 | * |
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180 | * @param map the map to be cleared |
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181 | */ |
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182 | __attribute__((__nonnull__)) |
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183 | static inline void cxMapClear(CxMap *map) { |
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184 | map->cl->clear(map); |
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185 | } |
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186 | |
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187 | /** |
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188 | * Puts a key/value-pair into the map. |
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189 | * |
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190 | * @param map the map |
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191 | * @param key the key |
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192 | * @param value the value |
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193 | * @return 0 on success, non-zero value on failure |
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194 | */ |
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195 | __attribute__((__nonnull__)) |
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196 | static inline int cxMapPut( |
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197 | CxMap *map, |
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198 | CxHashKey key, |
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199 | void *value |
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200 | ) { |
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201 | return map->cl->put(map, key, value); |
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202 | } |
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203 | |
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204 | /** |
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205 | * Retrieves a value by using a key. |
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206 | * |
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207 | * @param map the map |
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208 | * @param key the key |
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209 | * @return the value |
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210 | */ |
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211 | __attribute__((__nonnull__, __warn_unused_result__)) |
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212 | static inline void *cxMapGet( |
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213 | CxMap const *map, |
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214 | CxHashKey key |
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215 | ) { |
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216 | return map->cl->get(map, key); |
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217 | } |
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218 | |
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219 | /** |
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220 | * Removes a key/value-pair from the map by using the key. |
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221 | * |
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222 | * @param map the map |
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223 | * @param key the key |
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224 | * @return the removed value |
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225 | */ |
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226 | __attribute__((__nonnull__, __warn_unused_result__)) |
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227 | static inline void *cxMapRemove( |
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228 | CxMap *map, |
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229 | CxHashKey key |
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230 | ) { |
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231 | return map->cl->remove(map, key); |
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232 | } |
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233 | |
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234 | // TODO: set-like map operations (union, intersect, difference) |
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235 | |
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236 | /** |
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237 | * Creates a value iterator for a map. |
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238 | * |
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239 | * \note An iterator iterates over all elements successively. Therefore the order |
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240 | * highly depends on the map implementation and may change arbitrarily when the contents change. |
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241 | * |
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242 | * @param map the map to create the iterator for |
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243 | * @return an iterator for the currently stored values |
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244 | */ |
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245 | __attribute__((__nonnull__, __warn_unused_result__)) |
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246 | static inline CxIterator cxMapIteratorValues(CxMap *map) { |
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247 | return map->cl->iterator_values(map); |
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248 | } |
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249 | |
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250 | /** |
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251 | * Creates a key iterator for a map. |
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252 | * |
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253 | * The elements of the iterator are keys of type CxHashKey. |
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254 | * |
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255 | * \note An iterator iterates over all elements successively. Therefore the order |
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256 | * highly depends on the map implementation and may change arbitrarily when the contents change. |
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257 | * |
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258 | * @param map the map to create the iterator for |
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259 | * @return an iterator for the currently stored keys |
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260 | */ |
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261 | __attribute__((__nonnull__, __warn_unused_result__)) |
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262 | static inline CxIterator cxMapIteratorKeys(CxMap *map) { |
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263 | return map->cl->iterator_keys(map); |
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264 | } |
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265 | |
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266 | /** |
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267 | * Creates an iterator for a map. |
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268 | * |
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269 | * The elements of the iterator are key/value pairs of type CxMapEntry. |
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270 | * |
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271 | * \note An iterator iterates over all elements successively. Therefore the order |
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272 | * highly depends on the map implementation and may change arbitrarily when the contents change. |
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273 | * |
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274 | * @param map the map to create the iterator for |
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275 | * @return an iterator for the currently stored entries |
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276 | * @see cxMapIteratorKeys() |
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277 | * @see cxMapIteratorValues() |
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278 | */ |
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279 | __attribute__((__nonnull__, __warn_unused_result__)) |
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280 | static inline CxIterator cxMapIterator(CxMap *map) { |
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281 | return map->cl->iterator(map); |
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282 | } |
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283 | |
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284 | |
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285 | /** |
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286 | * Creates a mutating iterator over the values of a map. |
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287 | * |
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288 | * \note An iterator iterates over all elements successively. Therefore the order |
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289 | * highly depends on the map implementation and may change arbitrarily when the contents change. |
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290 | * |
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291 | * @param map the map to create the iterator for |
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292 | * @return an iterator for the currently stored values |
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293 | */ |
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294 | __attribute__((__nonnull__, __warn_unused_result__)) |
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295 | static inline CxMutIterator cxMapMutIteratorValues(CxMap *map) { |
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296 | return map->cl->mut_iterator_values(map); |
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297 | } |
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298 | |
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299 | /** |
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300 | * Creates a mutating iterator over the keys of a map. |
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301 | * |
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302 | * The elements of the iterator are keys of type CxHashKey. |
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303 | * |
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304 | * \note An iterator iterates over all elements successively. Therefore the order |
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305 | * highly depends on the map implementation and may change arbitrarily when the contents change. |
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306 | * |
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307 | * @param map the map to create the iterator for |
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308 | * @return an iterator for the currently stored keys |
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309 | */ |
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310 | __attribute__((__nonnull__, __warn_unused_result__)) |
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311 | static inline CxMutIterator cxMapMutIteratorKeys(CxMap *map) { |
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312 | return map->cl->mut_iterator_keys(map); |
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313 | } |
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314 | |
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315 | /** |
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316 | * Creates a mutating iterator for a map. |
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317 | * |
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318 | * The elements of the iterator are key/value pairs of type CxMapEntry. |
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319 | * |
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320 | * \note An iterator iterates over all elements successively. Therefore the order |
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321 | * highly depends on the map implementation and may change arbitrarily when the contents change. |
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322 | * |
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323 | * @param map the map to create the iterator for |
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324 | * @return an iterator for the currently stored entries |
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325 | * @see cxMapMutIteratorKeys() |
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326 | * @see cxMapMutIteratorValues() |
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327 | */ |
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328 | __attribute__((__nonnull__, __warn_unused_result__)) |
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329 | static inline CxMutIterator cxMapMutIterator(CxMap *map) { |
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330 | return map->cl->mut_iterator(map); |
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331 | } |
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332 | |
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333 | #ifdef __cplusplus |
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334 | } |
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335 | #endif |
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336 | |
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337 | #endif // UCX_MAP_H |