ucx/basic_mempool.c

Tue, 13 Jun 2023 21:58:29 +0200

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Tue, 13 Jun 2023 21:58:29 +0200
changeset 762
098b2e3ab240
parent 747
efbd59642577
permissions
-rw-r--r--

fix iterator misuse in dav-sync delete-conflict

747
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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 #include "cx/basic_mempool.h"
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30 #include "cx/utils.h"
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31 #include <string.h>
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32
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33 #define of_chk_(n) if (SIZE_MAX - sizeof(cx_destructor_func) < (n)) return NULL
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34
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35 /** Internal structure for denoting pooled memory. */
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36 typedef struct {
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37 /** The destructor. */
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38 cx_destructor_func destructor;
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39 /**
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40 * Access to the first byte of the polled memory.
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41 */
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42 char c;
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43 } cx_basic_mempool_memory;
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44
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45 static int cx_basic_mempool_chcap(
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46 struct cx_basic_mempool_s *pool,
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47 size_t newcap
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48 ) {
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49 if (newcap < pool->ndata) {
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50 return 1;
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51 }
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52
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53 size_t newcapsz;
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54 if (cx_szmul(newcap, sizeof(void *), &newcapsz)) {
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55 return 1;
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56 }
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57
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58 void **data = realloc(pool->data, newcapsz);
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59 if (data) {
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60 pool->data = data;
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61 pool->size = newcap;
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62 return 0;
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63 } else {
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64 return 1;
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65 }
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66 }
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67
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68 void *cx_malloc_basic_mempool(
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69 void *data,
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70 size_t n
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71 ) {
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72 of_chk_(n);
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73 struct cx_basic_mempool_s *pool = data;
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74
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75 if (pool->ndata >= pool->size) {
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76 size_t newcap = pool->size * 2;
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77 if (newcap < pool->size || cx_basic_mempool_chcap(pool, newcap)) {
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78 return NULL;
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79 }
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80 }
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81
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82 cx_basic_mempool_memory *mem = malloc(sizeof(cx_destructor_func) + n);
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83 if (mem == NULL) {
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84 return NULL;
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85 }
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86
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87 mem->destructor = NULL;
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88 pool->data[pool->ndata] = mem;
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89 pool->ndata++;
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90
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91 return &(mem->c);
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92 }
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93
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94 void *cx_calloc_basic_mempool(
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95 void *data,
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96 size_t nelem,
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97 size_t elsize
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98 ) {
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99 size_t msz;
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100 if (cx_szmul(nelem, elsize, &msz)) {
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101 return NULL;
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102 }
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103 void *ptr = cx_malloc_basic_mempool(data, msz);
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104 if (ptr == NULL) {
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105 return NULL;
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106 }
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107 memset(ptr, 0, nelem * elsize);
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108 return ptr;
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109 }
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110
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111 void *cx_realloc_basic_mempool(
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112 void *data,
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113 void *ptr,
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114 size_t n
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115 ) {
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116 of_chk_(n);
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117 struct cx_basic_mempool_s *pool = data;
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118
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119 char *mem = ((char *) ptr) - sizeof(cx_destructor_func);
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120 char *newm = (char *) realloc(mem, n + sizeof(cx_destructor_func));
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121 if (newm == NULL) {
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122 return NULL;
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123 }
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124 if (mem != newm) {
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125 cx_for_n(i, pool->ndata) {
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126 if (pool->data[i] == mem) {
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127 pool->data[i] = newm;
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128 return newm + sizeof(cx_destructor_func);
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129 }
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130 }
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131 abort();
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132 } else {
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133 return newm + sizeof(cx_destructor_func);
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diff changeset
134 }
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
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diff changeset
135 }
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
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parents:
diff changeset
136
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parents:
diff changeset
137 void cx_free_basic_mempool(
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
138 void *data,
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
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parents:
diff changeset
139 void *ptr
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diff changeset
140 ) {
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diff changeset
141 struct cx_basic_mempool_s *pool = data;
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parents:
diff changeset
142
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diff changeset
143 cx_basic_mempool_memory *mem = (cx_basic_mempool_memory *)
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parents:
diff changeset
144 ((char *) ptr - sizeof(cx_destructor_func));
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parents:
diff changeset
145 cx_for_n(i, pool->ndata) {
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parents:
diff changeset
146 if (mem == pool->data[i]) {
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parents:
diff changeset
147 if (mem->destructor != NULL) {
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diff changeset
148 mem->destructor(&(mem->c));
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149 }
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diff changeset
150 free(mem);
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parents:
diff changeset
151 size_t last_index = pool->ndata - 1;
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diff changeset
152 if (i != last_index) {
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parents:
diff changeset
153 pool->data[i] = pool->data[last_index];
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diff changeset
154 pool->data[last_index] = NULL;
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parents:
diff changeset
155 }
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diff changeset
156 pool->ndata--;
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parents:
diff changeset
157 return;
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diff changeset
158 }
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diff changeset
159 }
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parents:
diff changeset
160 abort();
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161 }
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parents:
diff changeset
162
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Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
163 void cx_basic_mempool_destroy(CxMempool *p) {
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parents:
diff changeset
164 struct cx_basic_mempool_s *pool = (struct cx_basic_mempool_s *) p;
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diff changeset
165 cx_basic_mempool_memory *mem;
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parents:
diff changeset
166 cx_for_n(i, pool->ndata) {
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parents:
diff changeset
167 mem = (cx_basic_mempool_memory *) pool->data[i];
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parents:
diff changeset
168 if (mem) {
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parents:
diff changeset
169 if (mem->destructor) {
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parents:
diff changeset
170 mem->destructor(&(mem->c));
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parents:
diff changeset
171 }
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parents:
diff changeset
172 free(mem);
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parents:
diff changeset
173 }
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parents:
diff changeset
174 }
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parents:
diff changeset
175 free(pool->data);
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parents:
diff changeset
176 free((void *) p->allocator);
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parents:
diff changeset
177 free(pool);
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
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parents:
diff changeset
178 }
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
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parents:
diff changeset
179
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parents:
diff changeset
180 void cx_basic_mempool_set_destr(
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
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parents:
diff changeset
181 __attribute__((__unused__)) CxMempool *pool,
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
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parents:
diff changeset
182 void *ptr,
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
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parents:
diff changeset
183 cx_destructor_func func
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
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parents:
diff changeset
184 ) {
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parents:
diff changeset
185 *(cx_destructor_func *) ((char *) ptr - sizeof(cx_destructor_func)) = func;
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
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parents:
diff changeset
186 }
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parents:
diff changeset
187
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parents:
diff changeset
188 static cx_allocator_class cx_basic_mempool_allocator_class = {
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parents:
diff changeset
189 cx_malloc_basic_mempool,
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
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parents:
diff changeset
190 cx_realloc_basic_mempool,
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
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parents:
diff changeset
191 cx_calloc_basic_mempool,
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
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parents:
diff changeset
192 cx_free_basic_mempool
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
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parents:
diff changeset
193 };
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
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parents:
diff changeset
194
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
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parents:
diff changeset
195 static cx_mempool_class cx_basic_mempool_class = {
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parents:
diff changeset
196 cx_basic_mempool_destroy,
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
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parents:
diff changeset
197 cx_basic_mempool_set_destr,
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
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parents:
diff changeset
198 };
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
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parents:
diff changeset
199
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parents:
diff changeset
200 CxMempool *cxBasicMempoolCreate(size_t capacity) {
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parents:
diff changeset
201 size_t poolsize;
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parents:
diff changeset
202 if (cx_szmul(capacity, sizeof(void *), &poolsize)) {
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parents:
diff changeset
203 return NULL;
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
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parents:
diff changeset
204 }
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
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parents:
diff changeset
205
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
206 struct cx_basic_mempool_s *pool =
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
207 malloc(sizeof(struct cx_basic_mempool_s));
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
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parents:
diff changeset
208 if (pool == NULL) {
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
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parents:
diff changeset
209 return NULL;
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
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parents:
diff changeset
210 }
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
211
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
212
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
213 CxAllocator *provided_allocator = malloc(sizeof(CxAllocator));
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
214 if (!provided_allocator) {
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
215 free(pool);
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
216 return NULL;
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
217 }
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
218 provided_allocator->cl = &cx_basic_mempool_allocator_class;
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
219 provided_allocator->data = pool;
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
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parents:
diff changeset
220
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
221 pool->base.cl = &cx_basic_mempool_class;
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
222 pool->base.allocator = provided_allocator;
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
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parents:
diff changeset
223
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
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parents:
diff changeset
224 pool->data = malloc(poolsize);
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
225 if (pool->data == NULL) {
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
226 free(provided_allocator);
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
227 free(pool);
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
228 return NULL;
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
229 }
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
230
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
231 pool->ndata = 0;
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
232 pool->size = capacity;
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
233
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
234 return (CxMempool *) pool;
efbd59642577 ucx 3 update, basic dav commands work, most stuff is still broken
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
235 }

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