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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 | #include "ucx/mempool.h" |
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30 | |
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31 | #include <stdlib.h> |
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32 | #include <string.h> |
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33 | #include <stdio.h> |
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34 | #ifdef __cplusplus |
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35 | #define __STDC_FORMAT_MACROS |
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36 | #endif |
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37 | #include <inttypes.h> |
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38 | |
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39 | /** Capsule for destructible memory chunks. */ |
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40 | typedef struct { |
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41 | /** The destructor for the memory chunk. */ |
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42 | ucx_destructor destructor; |
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43 | /** |
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44 | * First byte of the memory chunk. |
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45 | * Note, that the address <code>&c</code> is also the address |
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46 | * of the whole memory chunk. |
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47 | */ |
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48 | char c; |
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49 | } ucx_memchunk; |
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50 | |
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51 | /** Capsule for data and its destructor. */ |
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52 | typedef struct { |
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53 | /** The destructor for the data. */ |
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54 | ucx_destructor destructor; |
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55 | /** A pointer to the data. */ |
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56 | void *ptr; |
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57 | } ucx_regdestr; |
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58 | |
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59 | #ifdef __cplusplus |
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60 | extern "C" |
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61 | #endif |
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62 | void ucx_mempool_shared_destr(void* ptr) { |
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63 | ucx_regdestr *rd = (ucx_regdestr*)ptr; |
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64 | rd->destructor(rd->ptr); |
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65 | } |
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66 | |
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67 | UcxMempool *ucx_mempool_new(size_t n) { |
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68 | UcxMempool *pool = (UcxMempool*)malloc(sizeof(UcxMempool)); |
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69 | if (!pool) { |
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70 | return NULL; |
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71 | } |
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72 | |
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73 | pool->data = (void**) malloc(n * sizeof(void*)); |
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74 | if (pool->data == NULL) { |
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75 | free(pool); |
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76 | return NULL; |
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77 | } |
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78 | |
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79 | pool->ndata = 0; |
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80 | pool->size = n; |
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81 | |
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82 | UcxAllocator *allocator = (UcxAllocator*)malloc(sizeof(UcxAllocator)); |
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83 | if(!allocator) { |
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84 | free(pool->data); |
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85 | free(pool); |
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86 | return NULL; |
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87 | } |
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88 | allocator->malloc = (ucx_allocator_malloc)ucx_mempool_malloc; |
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89 | allocator->calloc = (ucx_allocator_calloc)ucx_mempool_calloc; |
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90 | allocator->realloc = (ucx_allocator_realloc)ucx_mempool_realloc; |
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91 | allocator->free = (ucx_allocator_free)ucx_mempool_free; |
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92 | allocator->pool = pool; |
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93 | pool->allocator = allocator; |
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94 | |
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95 | return pool; |
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96 | } |
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97 | |
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98 | int ucx_mempool_chcap(UcxMempool *pool, size_t newcap) { |
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99 | if (newcap < pool->ndata) { |
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100 | return 1; |
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101 | } |
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102 | |
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103 | void **data = (void**) realloc(pool->data, newcap*sizeof(void*)); |
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104 | if (data) { |
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105 | pool->data = data; |
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106 | pool->size = newcap; |
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107 | return 0; |
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108 | } else { |
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109 | return 1; |
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110 | } |
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111 | } |
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112 | |
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113 | void *ucx_mempool_malloc(UcxMempool *pool, size_t n) { |
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114 | if (pool->ndata >= pool->size) { |
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115 | size_t newcap = pool->size*2; |
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116 | if (newcap < pool->size || ucx_mempool_chcap(pool, newcap)) { |
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117 | return NULL; |
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118 | } |
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119 | } |
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120 | |
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121 | void *p = malloc(sizeof(ucx_destructor) + n); |
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122 | ucx_memchunk *mem = (ucx_memchunk*)p; |
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123 | if (!mem) { |
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124 | return NULL; |
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125 | } |
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126 | |
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127 | mem->destructor = NULL; |
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128 | pool->data[pool->ndata] = mem; |
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129 | pool->ndata++; |
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130 | |
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131 | return &(mem->c); |
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132 | } |
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133 | |
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134 | void *ucx_mempool_calloc(UcxMempool *pool, size_t nelem, size_t elsize) { |
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135 | void *ptr = ucx_mempool_malloc(pool, nelem*elsize); |
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136 | if (!ptr) { |
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137 | return NULL; |
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138 | } |
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139 | memset(ptr, 0, nelem * elsize); |
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140 | return ptr; |
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141 | } |
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142 | |
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143 | void *ucx_mempool_realloc(UcxMempool *pool, void *ptr, size_t n) { |
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144 | char *mem = ((char*)ptr) - sizeof(ucx_destructor); |
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145 | char *newm = (char*) realloc(mem, n + sizeof(ucx_destructor)); |
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146 | if (!newm) { |
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147 | return NULL; |
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148 | } |
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149 | if (mem != newm) { |
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150 | for(size_t i=0 ; i < pool->ndata ; i++) { |
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151 | if(pool->data[i] == mem) { |
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152 | pool->data[i] = newm; |
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153 | return newm + sizeof(ucx_destructor); |
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154 | } |
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155 | } |
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156 | fprintf(stderr, "FATAL: 0x%08" PRIxPTR" not in mpool 0x%08" PRIxPTR"\n", |
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157 | (intptr_t)ptr, (intptr_t)pool); |
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158 | abort(); |
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159 | } else { |
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160 | return newm + sizeof(ucx_destructor); |
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161 | } |
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162 | } |
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163 | |
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164 | void ucx_mempool_free(UcxMempool *pool, void *ptr) { |
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165 | ucx_memchunk *chunk = (ucx_memchunk*)((char*)ptr-sizeof(ucx_destructor)); |
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166 | for(size_t i=0 ; i<pool->ndata ; i++) { |
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167 | if(chunk == pool->data[i]) { |
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168 | if(chunk->destructor != NULL) { |
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169 | chunk->destructor(&(chunk->c)); |
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170 | } |
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171 | free(chunk); |
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172 | size_t last_index = pool->ndata - 1; |
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173 | if(i != last_index) { |
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174 | pool->data[i] = pool->data[last_index]; |
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175 | pool->data[last_index] = NULL; |
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176 | } |
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177 | pool->ndata--; |
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178 | return; |
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179 | } |
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180 | } |
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181 | fprintf(stderr, "FATAL: 0x%08" PRIxPTR" not in mpool 0x%08" PRIxPTR"\n", |
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182 | (intptr_t)ptr, (intptr_t)pool); |
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183 | abort(); |
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184 | } |
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185 | |
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186 | void ucx_mempool_destroy(UcxMempool *pool) { |
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187 | ucx_memchunk *chunk; |
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188 | for(size_t i=0 ; i<pool->ndata ; i++) { |
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189 | chunk = (ucx_memchunk*) pool->data[i]; |
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190 | if(chunk) { |
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191 | if(chunk->destructor) { |
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192 | chunk->destructor(&(chunk->c)); |
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193 | } |
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194 | free(chunk); |
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195 | } |
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196 | } |
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197 | free(pool->data); |
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198 | free(pool->allocator); |
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199 | free(pool); |
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200 | } |
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201 | |
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202 | void ucx_mempool_set_destr(void *ptr, ucx_destructor func) { |
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203 | *(ucx_destructor*)((char*)ptr-sizeof(ucx_destructor)) = func; |
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204 | } |
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205 | |
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206 | void ucx_mempool_reg_destr(UcxMempool *pool, void *ptr, ucx_destructor destr) { |
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207 | ucx_regdestr *rd = (ucx_regdestr*)ucx_mempool_malloc( |
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208 | pool, |
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209 | sizeof(ucx_regdestr)); |
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210 | rd->destructor = destr; |
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211 | rd->ptr = ptr; |
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212 | ucx_mempool_set_destr(rd, ucx_mempool_shared_destr); |
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213 | } |
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214 |