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adds -V option to get, get-property and info commands
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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 2017 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 | * Allocator for custom memory management. |
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30 | * |
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31 | * A UCX allocator consists of a pointer to the memory area / pool and four |
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32 | * function pointers to memory management functions operating on this memory |
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33 | * area / pool. These functions shall behave equivalent to the standard libc |
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34 | * functions <code>malloc(), calloc(), realloc()</code> and <code>free()</code>. |
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35 | * |
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36 | * The signature of the memory management functions is based on the signature |
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37 | * of the respective libc function but each of them takes the pointer to the |
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38 | * memory area / pool as first argument. |
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39 | * |
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40 | * As the pointer to the memory area / pool can be arbitrarily chosen, any data |
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41 | * can be provided to the memory management functions. A UcxMempool is just |
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42 | * one example. |
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43 | * |
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44 | * @see mempool.h |
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45 | * @see UcxMap |
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46 | * |
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47 | * @file allocator.h |
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48 | * @author Mike Becker |
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49 | * @author Olaf Wintermann |
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50 | */ |
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51 | |
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52 | #ifndef UCX_ALLOCATOR_H |
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53 | #define UCX_ALLOCATOR_H |
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54 | |
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55 | #include "ucx.h" |
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56 | |
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57 | #ifdef __cplusplus |
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58 | extern "C" { |
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59 | #endif |
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60 | |
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61 | /** |
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62 | * A function pointer to the allocators <code>malloc()</code> function. |
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63 | * @see UcxAllocator |
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64 | */ |
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65 | typedef void*(*ucx_allocator_malloc)(void *pool, size_t n); |
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66 | |
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67 | /** |
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68 | * A function pointer to the allocators <code>calloc()</code> function. |
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69 | * @see UcxAllocator |
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70 | */ |
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71 | typedef void*(*ucx_allocator_calloc)(void *pool, size_t n, size_t size); |
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72 | |
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73 | /** |
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74 | * A function pointer to the allocators <code>realloc()</code> function. |
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75 | * @see UcxAllocator |
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76 | */ |
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77 | typedef void*(*ucx_allocator_realloc)(void *pool, void *data, size_t n); |
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78 | |
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79 | /** |
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80 | * A function pointer to the allocators <code>free()</code> function. |
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81 | * @see UcxAllocator |
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82 | */ |
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83 | typedef void(*ucx_allocator_free)(void *pool, void *data); |
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84 | |
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85 | /** |
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86 | * UCX allocator data structure containing memory management functions. |
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87 | */ |
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88 | typedef struct { |
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89 | /** Pointer to an area of memory or a complex memory pool. |
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90 | * This pointer will be passed to any memory management function as first |
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91 | * argument. |
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92 | */ |
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93 | void *pool; |
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94 | /** |
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95 | * The <code>malloc()</code> function for this allocator. |
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96 | */ |
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97 | ucx_allocator_malloc malloc; |
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98 | /** |
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99 | * The <code>calloc()</code> function for this allocator. |
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100 | */ |
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101 | ucx_allocator_calloc calloc; |
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102 | /** |
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103 | * The <code>realloc()</code> function for this allocator. |
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104 | */ |
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105 | ucx_allocator_realloc realloc; |
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106 | /** |
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107 | * The <code>free()</code> function for this allocator. |
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108 | */ |
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109 | ucx_allocator_free free; |
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110 | } UcxAllocator; |
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111 | |
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112 | /** |
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113 | * Returns a pointer to the default allocator. |
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114 | * |
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115 | * The default allocator contains wrappers to the standard libc memory |
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116 | * management functions. Use this function to get a pointer to a globally |
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117 | * available allocator. You may also define an own UcxAllocator by assigning |
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118 | * #UCX_ALLOCATOR_DEFAULT to a variable and pass the address of this variable |
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119 | * to any function that takes a UcxAllocator as argument. Note that using |
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120 | * this function is the recommended way of passing a default allocator, thus |
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121 | * it never runs out of scope. |
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122 | * |
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123 | * @return a pointer to the default allocator |
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124 | * |
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125 | * @see UCX_ALLOCATOR_DEFAULT |
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126 | */ |
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127 | UcxAllocator *ucx_default_allocator(); |
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128 | |
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129 | /** |
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130 | * A wrapper for the standard libc <code>malloc()</code> function. |
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131 | * @param ignore ignored (may be used by allocators for pooled memory) |
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132 | * @param n argument passed to <code>malloc()</code> |
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133 | * @return return value of <code>malloc()</code> |
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134 | */ |
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135 | void *ucx_default_malloc(void *ignore, size_t n); |
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136 | /** |
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137 | * A wrapper for the standard libc <code>calloc()</code> function. |
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138 | * @param ignore ignored (may be used by allocators for pooled memory) |
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139 | * @param n argument passed to <code>calloc()</code> |
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140 | * @param size argument passed to <code>calloc()</code> |
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141 | * @return return value of <code>calloc()</code> |
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142 | */ |
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143 | void *ucx_default_calloc(void *ignore, size_t n, size_t size); |
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144 | /** |
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145 | * A wrapper for the standard libc <code>realloc()</code> function. |
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146 | * @param ignore ignored (may be used by allocators for pooled memory) |
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147 | * @param data argumend passed to <code>realloc()</code> |
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148 | * @param n argument passed to <code>realloc()</code> |
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149 | * @return return value of <code>realloc()</code> |
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150 | */ |
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151 | void *ucx_default_realloc(void *ignore, void *data, size_t n); |
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152 | /** |
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153 | * A wrapper for the standard libc <code>free()</code> function. |
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154 | * @param ignore ignored (may be used by allocators for pooled memory) |
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155 | * @param data argument passed to <code>free()</code> |
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156 | */ |
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157 | void ucx_default_free(void *ignore, void *data); |
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158 | |
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159 | /** |
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160 | * Shorthand for calling an allocators malloc function. |
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161 | * @param allocator the allocator to use |
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162 | * @param n size of space to allocate |
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163 | * @return a pointer to the allocated memory area |
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164 | */ |
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165 | #define almalloc(allocator, n) ((allocator)->malloc((allocator)->pool, n)) |
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166 | |
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167 | /** |
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168 | * Shorthand for calling an allocators calloc function. |
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169 | * @param allocator the allocator to use |
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170 | * @param n the count of elements the space should be allocated for |
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171 | * @param size the size of each element |
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172 | * @return a pointer to the allocated memory area |
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173 | */ |
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174 | #define alcalloc(allocator, n, size) \ |
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175 | ((allocator)->calloc((allocator)->pool, n, size)) |
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176 | |
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177 | /** |
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178 | * Shorthand for calling an allocators realloc function. |
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179 | * @param allocator the allocator to use |
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180 | * @param ptr the pointer to the memory area that shall be reallocated |
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181 | * @param n the new size of the allocated memory area |
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182 | * @return a pointer to the reallocated memory area |
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183 | */ |
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184 | #define alrealloc(allocator, ptr, n) \ |
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185 | ((allocator)->realloc((allocator)->pool, ptr, n)) |
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186 | |
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187 | /** |
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188 | * Shorthand for calling an allocators free function. |
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189 | * @param allocator the allocator to use |
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190 | * @param ptr the pointer to the memory area that shall be freed |
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191 | */ |
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192 | #define alfree(allocator, ptr) ((allocator)->free((allocator)->pool, ptr)) |
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193 | |
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194 | /** |
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195 | * Convenient macro for a default allocator <code>struct</code> definition. |
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196 | */ |
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197 | #define UCX_ALLOCATOR_DEFAULT {NULL, \ |
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198 | ucx_default_malloc, ucx_default_calloc, ucx_default_realloc, \ |
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199 | ucx_default_free } |
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200 | |
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201 | #ifdef __cplusplus |
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202 | } |
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203 | #endif |
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204 | |
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205 | #endif /* UCX_ALLOCATOR_H */ |
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206 |