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annotate src/libmlk-core/core/alloc.c @ 423:63ebfa352ae1

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core: use err.h in font
author David Demelier <markand@malikania.fr>
date Sat, 15 Oct 2022 14:00:38 +0200
parents 7321511052f6
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * alloc.h -- custom allocators
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3 *
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460c78706989 misc: update copyright years
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4 * Copyright (c) 2020-2022 David Demelier <markand@malikania.fr>
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5 *
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6 * Permission to use, copy, modify, and/or distribute this software for any
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7 * purpose with or without fee is hereby granted, provided that the above
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8 * copyright notice and this permission notice appear in all copies.
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9 *
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10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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17 */
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18
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19 #include <assert.h>
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20 #include <errno.h>
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21 #include <stdlib.h>
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22 #include <string.h>
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23
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24 #include <SDL.h>
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25
182
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26 #include "alloc.h"
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27 #include "buf.h"
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28 #include "error.h"
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29 #include "panic.h"
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30
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31 static void *
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32 panic_alloc(size_t size)
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33 {
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34 void *mem;
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35
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36 if (!(mem = malloc(size)))
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37 panicf("%s", strerror(errno));
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38
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39 return mem;
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40 }
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41
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42 static void *
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43 panic_realloc(void *ptr, size_t size)
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44 {
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45 void *mem;
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46
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47 if (!(mem = realloc(ptr, size)) && size != 0)
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48 panicf("%s", strerror(errno));
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49
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50 return mem;
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51 }
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52
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53 static const struct alloc_funcs default_alloc_funcs = {
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54 .alloc = panic_alloc,
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55 .realloc = panic_realloc,
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56 .free = free
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57 };
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58
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59 static const struct alloc_funcs *funcs = &default_alloc_funcs;
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60
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61 void
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62 alloc_set(const struct alloc_funcs *newfuncs)
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63 {
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64 assert(funcs);
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65 assert(funcs->alloc);
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66 assert(funcs->realloc);
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67 assert(funcs->free);
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68
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69 funcs = newfuncs;
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70
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71 /* Change SDL allocators as well. */
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72 SDL_SetMemoryFunctions(alloc_new, alloc_array0, alloc_renew, free);
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73 }
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74
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75 void *
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76 alloc_new(size_t size)
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77 {
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78 assert(size != 0);
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79
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80 return funcs->alloc(size);
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81 }
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82
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83 void *
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84 alloc_new0(size_t size)
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85 {
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86 assert(size != 0);
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87
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88 return memset(funcs->alloc(size), 0, size);
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89 }
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90
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91 void *
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92 alloc_array(size_t len, size_t elemsize)
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93 {
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94 assert(len != 0);
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95 assert(elemsize != 0);
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96
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97 return funcs->alloc(len * elemsize);
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98 }
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99
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100 void *
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101 alloc_array0(size_t len, size_t elemsize)
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102 {
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103 assert(len != 0);
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104 assert(elemsize != 0);
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105
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106 return alloc_new0(len * elemsize);
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107 }
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108
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109 void *
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110 alloc_renew(void *ptr, size_t size)
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111 {
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112 return funcs->realloc(ptr, size);
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113 }
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114
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115 void *
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116 alloc_rearray(void *ptr, size_t len, size_t elemsize)
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117 {
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118 assert(elemsize != 0);
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119
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120 return funcs->realloc(ptr, len * elemsize);
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121 }
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122
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123 void *
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124 alloc_rearray0(void *ptr, size_t oldlen, size_t newlen, size_t elemsize)
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125 {
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126 ptr = funcs->realloc(ptr, newlen * elemsize);
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127
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128 if (newlen > oldlen)
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129 memset((unsigned char *)ptr + (oldlen * elemsize), 0, (newlen - oldlen) * elemsize);
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130
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131 return ptr;
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132 }
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133
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134 void *
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135 alloc_dup(const void *ptr, size_t size)
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136 {
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137 assert(ptr);
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138 assert(size != 0);
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139
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140 return memcpy(funcs->alloc(size), ptr, size);
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141 }
227
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142
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143 char *
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144 alloc_sdup(const char *src)
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145 {
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146 assert(src);
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147
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148 size_t len = strlen(src) + 1;
227
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149
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150 return memcpy(funcs->alloc(len), src, len);
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151 }
228
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152
402
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153 char *
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154 alloc_sdupf(const char *fmt, ...)
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155 {
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156 struct buf buf = {0};
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157 va_list ap;
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158
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159 va_start(ap, fmt);
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160 buf_vprintf(&buf, fmt, ap);
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161 va_end(ap);
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162
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163 return buf.data;
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164 }
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165
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166 void
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167 alloc_free(void *ptr)
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168 {
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169 funcs->free(ptr);
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170 }
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171
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172 void
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173 alloc_pool_init(struct alloc_pool *pool, size_t elemsize, void (*finalizer)(void *))
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174 {
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175 assert(pool);
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176 assert(elemsize != 0);
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177
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178 pool->data = alloc_array(ALLOC_POOL_INIT_DEFAULT, elemsize);
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179 pool->elemsize = elemsize;
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180 pool->size = 0;
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181 pool->capacity = ALLOC_POOL_INIT_DEFAULT;
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182 pool->finalizer = finalizer;
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183 }
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184
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185 void *
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186 alloc_pool_new(struct alloc_pool *pool)
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187 {
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188 assert(pool);
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189
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190 if (pool->size >= pool->capacity) {
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191 pool->capacity *= 2;
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192 pool->data = alloc_rearray(pool->data, pool->capacity, pool->elemsize);
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193 }
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194
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195 return ((unsigned char *)pool->data) + pool->size++ * pool->elemsize;
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196 }
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197
237
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198 void *
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199 alloc_pool_get(const struct alloc_pool *pool, size_t index)
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200 {
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201 assert(pool);
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202 assert(index < pool->size);
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203
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204 return ((unsigned char *)pool->data) + index * pool->elemsize;
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205 }
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206
404
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207 void *
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208 alloc_pool_shrink(struct alloc_pool *pool)
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209 {
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210 assert(pool);
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211
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212 void *ptr;
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213
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214 ptr = alloc_rearray(pool->data, pool->size, pool->elemsize);
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215 memset(pool, 0, sizeof (*pool));
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216
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217 return ptr;
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218 }
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219
228
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220 void
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221 alloc_pool_finish(struct alloc_pool *pool)
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222 {
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223 unsigned char *tab;
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224
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225 if (!pool)
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226 return;
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227
228
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228 if (pool->finalizer) {
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229 tab = pool->data;
228
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230
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231 for (size_t i = 0; i < pool->size; ++i)
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232 pool->finalizer(tab + i * pool->elemsize);
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233 }
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234
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235 free(pool->data);
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236 memset(pool, 0, sizeof (*pool));
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237 }