Mercurial > hg > nginx
annotate src/core/ngx_slab.c @ 3341:2ca2fbaf83e3 stable-0.7
release-0.7.64 tag
author | Igor Sysoev <igor@sysoev.ru> |
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date | Mon, 16 Nov 2009 15:29:47 +0000 |
parents | 6b87e875e87a |
children | 1b779cb69dc8 4919fb357a5d |
rev | line source |
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
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4 */ |
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5 |
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6 #include <ngx_config.h> |
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7 #include <ngx_core.h> |
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8 |
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9 |
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10 #define NGX_SLAB_PAGE_MASK 3 |
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11 #define NGX_SLAB_PAGE 0 |
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12 #define NGX_SLAB_BIG 1 |
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13 #define NGX_SLAB_EXACT 2 |
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14 #define NGX_SLAB_SMALL 3 |
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15 |
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16 #if (NGX_PTR_SIZE == 4) |
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17 |
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18 #define NGX_SLAB_PAGE_FREE 0 |
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19 #define NGX_SLAB_PAGE_BUSY 0xffffffff |
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20 #define NGX_SLAB_PAGE_START 0x80000000 |
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21 |
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22 #define NGX_SLAB_SHIFT_MASK 0x0000000f |
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23 #define NGX_SLAB_MAP_MASK 0xffff0000 |
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24 #define NGX_SLAB_MAP_SHIFT 16 |
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25 |
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26 #define NGX_SLAB_BUSY 0xffffffff |
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27 |
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28 #else /* (NGX_PTR_SIZE == 8) */ |
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29 |
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30 #define NGX_SLAB_PAGE_FREE 0 |
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31 #define NGX_SLAB_PAGE_BUSY 0xffffffffffffffff |
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32 #define NGX_SLAB_PAGE_START 0x8000000000000000 |
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33 |
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34 #define NGX_SLAB_SHIFT_MASK 0x000000000000000f |
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35 #define NGX_SLAB_MAP_MASK 0xffffffff00000000 |
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36 #define NGX_SLAB_MAP_SHIFT 32 |
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37 |
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38 #define NGX_SLAB_BUSY 0xffffffffffffffff |
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39 |
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40 #endif |
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41 |
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42 |
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43 #if (NGX_DEBUG_MALLOC) |
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44 |
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45 #define ngx_slab_junk(p, size) ngx_memset(p, 0xD0, size) |
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46 |
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47 #else |
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48 |
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49 #if (NGX_FREEBSD) |
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50 |
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51 #define ngx_slab_junk(p, size) \ |
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52 if (ngx_freebsd_debug_malloc) ngx_memset(p, 0xD0, size) |
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53 |
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54 #else |
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55 |
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56 #define ngx_slab_junk(p, size) |
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57 |
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58 #endif |
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59 |
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60 #endif |
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61 |
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62 static ngx_slab_page_t *ngx_slab_alloc_pages(ngx_slab_pool_t *pool, |
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63 ngx_uint_t pages); |
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64 static void ngx_slab_free_pages(ngx_slab_pool_t *pool, ngx_slab_page_t *page, |
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65 ngx_uint_t pages); |
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66 static void ngx_slab_error(ngx_slab_pool_t *pool, ngx_uint_t level, |
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67 char *text); |
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68 |
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69 |
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70 static ngx_uint_t ngx_slab_max_size; |
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71 static ngx_uint_t ngx_slab_exact_size; |
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72 static ngx_uint_t ngx_slab_exact_shift; |
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73 |
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74 |
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75 void |
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76 ngx_slab_init(ngx_slab_pool_t *pool) |
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77 { |
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78 u_char *p; |
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79 size_t size; |
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80 ngx_int_t m; |
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81 ngx_uint_t i, n, pages; |
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82 ngx_slab_page_t *slots; |
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83 |
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84 /* STUB */ |
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85 if (ngx_slab_max_size == 0) { |
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86 ngx_slab_max_size = ngx_pagesize / 2; |
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87 ngx_slab_exact_size = ngx_pagesize / (8 * sizeof(uintptr_t)); |
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88 for (n = ngx_slab_exact_size; n >>= 1; ngx_slab_exact_shift++) { |
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89 /* void */ |
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90 } |
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91 } |
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92 /**/ |
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93 |
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94 pool->min_size = 1 << pool->min_shift; |
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95 |
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96 p = (u_char *) pool + sizeof(ngx_slab_pool_t); |
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97 size = pool->end - p; |
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98 |
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99 ngx_slab_junk(p, size); |
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100 |
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101 slots = (ngx_slab_page_t *) p; |
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102 n = ngx_pagesize_shift - pool->min_shift; |
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103 |
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104 for (i = 0; i < n; i++) { |
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105 slots[i].slab = 0; |
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106 slots[i].next = &slots[i]; |
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107 slots[i].prev = 0; |
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108 } |
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109 |
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110 p += n * sizeof(ngx_slab_page_t); |
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111 |
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112 pages = (ngx_uint_t) (size / (ngx_pagesize + sizeof(ngx_slab_page_t))); |
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113 |
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114 ngx_memzero(p, pages * sizeof(ngx_slab_page_t)); |
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115 |
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116 pool->pages = (ngx_slab_page_t *) p; |
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117 |
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118 pool->free.prev = 0; |
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119 pool->free.next = (ngx_slab_page_t *) p; |
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120 |
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121 pool->pages->slab = pages; |
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122 pool->pages->next = &pool->free; |
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123 pool->pages->prev = (uintptr_t) &pool->free; |
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124 |
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125 pool->start = (u_char *) |
1016
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fix slab allocator on 64-bit platfroms
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126 ngx_align_ptr((uintptr_t) p + pages * sizeof(ngx_slab_page_t), |
860
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127 ngx_pagesize); |
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128 |
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129 m = pages - (pool->end - pool->start) / ngx_pagesize; |
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130 if (m > 0) { |
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131 pages -= m; |
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132 pool->pages->slab = pages; |
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133 } |
2611
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134 |
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135 pool->log_ctx = &pool->zero; |
2bce3f6416c6
improve ngx_slab_alloc() error logging
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136 pool->zero = '\0'; |
860
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137 } |
357
e260514b9ad4
nginx-0.0.7-2004-06-16-23:36:07 import
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138 |
e260514b9ad4
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139 |
860
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140 void * |
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141 ngx_slab_alloc(ngx_slab_pool_t *pool, size_t size) |
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142 { |
966
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143 void *p; |
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144 |
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145 ngx_shmtx_lock(&pool->mutex); |
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146 |
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|
147 p = ngx_slab_alloc_locked(pool, size); |
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148 |
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149 ngx_shmtx_unlock(&pool->mutex); |
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150 |
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151 return p; |
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152 } |
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153 |
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154 |
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155 void * |
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156 ngx_slab_alloc_locked(ngx_slab_pool_t *pool, size_t size) |
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157 { |
860
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158 size_t s; |
881
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fix building on 64-bit platforms
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|
159 uintptr_t p, n, m, mask, *bitmap; |
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160 ngx_uint_t i, slot, shift, map; |
860
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161 ngx_slab_page_t *page, *prev, *slots; |
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162 |
966
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163 if (size >= ngx_slab_max_size) { |
860
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164 |
966
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165 ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, ngx_cycle->log, 0, |
967 | 166 "slab alloc: %uz", size); |
966
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167 |
860
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168 page = ngx_slab_alloc_pages(pool, (size + ngx_pagesize - 1) |
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169 >> ngx_pagesize_shift); |
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170 if (page) { |
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171 p = (page - pool->pages) << ngx_pagesize_shift; |
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172 p += (uintptr_t) pool->start; |
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173 |
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174 } else { |
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175 p = 0; |
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|
176 } |
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|
177 |
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178 goto done; |
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179 } |
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180 |
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181 if (size > pool->min_size) { |
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|
182 shift = 1; |
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183 for (s = size - 1; s >>= 1; shift++) { /* void */ } |
201d017ea470
slab allocator in shared memory
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|
184 slot = shift - pool->min_shift; |
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|
185 |
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|
186 } else { |
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|
187 size = pool->min_size; |
201d017ea470
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|
188 shift = pool->min_shift; |
201d017ea470
slab allocator in shared memory
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|
189 slot = 0; |
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|
190 } |
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changeset
|
191 |
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diff
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|
192 ngx_log_debug2(NGX_LOG_DEBUG_ALLOC, ngx_cycle->log, 0, |
201d017ea470
slab allocator in shared memory
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|
193 "slab alloc: %uz slot: %ui", size, slot); |
201d017ea470
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|
194 |
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|
195 slots = (ngx_slab_page_t *) ((u_char *) pool + sizeof(ngx_slab_pool_t)); |
201d017ea470
slab allocator in shared memory
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|
196 page = slots[slot].next; |
201d017ea470
slab allocator in shared memory
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|
197 |
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|
198 if (page->next != page) { |
201d017ea470
slab allocator in shared memory
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diff
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|
199 |
966
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parents:
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diff
changeset
|
200 if (shift < ngx_slab_exact_shift) { |
860
201d017ea470
slab allocator in shared memory
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diff
changeset
|
201 |
201d017ea470
slab allocator in shared memory
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diff
changeset
|
202 do { |
201d017ea470
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|
203 p = (page - pool->pages) << ngx_pagesize_shift; |
201d017ea470
slab allocator in shared memory
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|
204 bitmap = (uintptr_t *) (pool->start + p); |
201d017ea470
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diff
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|
205 |
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diff
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|
206 map = (1 << (ngx_pagesize_shift - shift)) |
201d017ea470
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|
207 / (sizeof(uintptr_t) * 8); |
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|
208 |
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|
209 for (n = 0; n < map; n++) { |
201d017ea470
slab allocator in shared memory
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|
210 |
201d017ea470
slab allocator in shared memory
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diff
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|
211 if (bitmap[n] != NGX_SLAB_BUSY) { |
201d017ea470
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|
212 |
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slab allocator in shared memory
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diff
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|
213 for (m = 1, i = 0; m; m <<= 1, i++) { |
201d017ea470
slab allocator in shared memory
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diff
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|
214 if ((bitmap[n] & m)) { |
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|
215 continue; |
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|
216 } |
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|
217 |
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changeset
|
218 bitmap[n] |= m; |
966
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changeset
|
219 |
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diff
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|
220 i = ((n * sizeof(uintptr_t) * 8) << shift) |
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diff
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|
221 + (i << shift); |
860
201d017ea470
slab allocator in shared memory
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|
222 |
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|
223 if (bitmap[n] == NGX_SLAB_BUSY) { |
201d017ea470
slab allocator in shared memory
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|
224 for (n = n + 1; n < map; n++) { |
201d017ea470
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225 if (bitmap[n] != NGX_SLAB_BUSY) { |
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|
226 p = (uintptr_t) bitmap + i; |
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|
227 |
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|
228 goto done; |
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|
229 } |
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|
230 } |
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|
231 |
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diff
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|
232 prev = (ngx_slab_page_t *) |
201d017ea470
slab allocator in shared memory
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|
233 (page->prev & ~NGX_SLAB_PAGE_MASK); |
201d017ea470
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|
234 prev->next = page->next; |
201d017ea470
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diff
changeset
|
235 page->next->prev = page->prev; |
201d017ea470
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|
236 |
201d017ea470
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|
237 page->next = NULL; |
201d017ea470
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|
238 page->prev = NGX_SLAB_SMALL; |
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|
239 } |
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|
240 |
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changeset
|
241 p = (uintptr_t) bitmap + i; |
201d017ea470
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|
242 |
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|
243 goto done; |
201d017ea470
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|
244 } |
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|
245 } |
201d017ea470
slab allocator in shared memory
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246 } |
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247 |
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248 page = page->next; |
201d017ea470
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249 |
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|
250 } while (page); |
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251 |
966
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parents:
881
diff
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|
252 } else if (shift == ngx_slab_exact_shift) { |
860
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253 |
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|
254 do { |
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|
255 if (page->slab != NGX_SLAB_BUSY) { |
201d017ea470
slab allocator in shared memory
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|
256 |
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257 for (m = 1, i = 0; m; m <<= 1, i++) { |
201d017ea470
slab allocator in shared memory
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258 if ((page->slab & m)) { |
201d017ea470
slab allocator in shared memory
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|
259 continue; |
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slab allocator in shared memory
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|
260 } |
201d017ea470
slab allocator in shared memory
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|
261 |
201d017ea470
slab allocator in shared memory
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|
262 page->slab |= m; |
201d017ea470
slab allocator in shared memory
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|
263 |
201d017ea470
slab allocator in shared memory
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diff
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|
264 if (page->slab == NGX_SLAB_BUSY) { |
201d017ea470
slab allocator in shared memory
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parents:
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|
265 prev = (ngx_slab_page_t *) |
201d017ea470
slab allocator in shared memory
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|
266 (page->prev & ~NGX_SLAB_PAGE_MASK); |
201d017ea470
slab allocator in shared memory
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parents:
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|
267 prev->next = page->next; |
201d017ea470
slab allocator in shared memory
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parents:
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|
268 page->next->prev = page->prev; |
201d017ea470
slab allocator in shared memory
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|
269 |
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|
270 page->next = NULL; |
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slab allocator in shared memory
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271 page->prev = NGX_SLAB_EXACT; |
201d017ea470
slab allocator in shared memory
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|
272 } |
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slab allocator in shared memory
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|
273 |
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|
274 p = (page - pool->pages) << ngx_pagesize_shift; |
201d017ea470
slab allocator in shared memory
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275 p += i << shift; |
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slab allocator in shared memory
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276 p += (uintptr_t) pool->start; |
201d017ea470
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|
277 |
201d017ea470
slab allocator in shared memory
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|
278 goto done; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
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|
279 } |
201d017ea470
slab allocator in shared memory
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|
280 } |
201d017ea470
slab allocator in shared memory
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|
281 |
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|
282 page = page->next; |
201d017ea470
slab allocator in shared memory
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|
283 |
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|
284 } while (page); |
201d017ea470
slab allocator in shared memory
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285 |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
286 } else { /* shift > ngx_slab_exact_shift */ |
860
201d017ea470
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|
287 |
201d017ea470
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|
288 n = ngx_pagesize_shift - (page->slab & NGX_SLAB_SHIFT_MASK); |
201d017ea470
slab allocator in shared memory
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|
289 n = 1 << n; |
1016
d0e8c81d3bb7
fix slab allocator on 64-bit platfroms
Igor Sysoev <igor@sysoev.ru>
parents:
967
diff
changeset
|
290 n = ((uintptr_t) 1 << n) - 1; |
860
201d017ea470
slab allocator in shared memory
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diff
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|
291 mask = n << NGX_SLAB_MAP_SHIFT; |
201d017ea470
slab allocator in shared memory
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|
292 |
201d017ea470
slab allocator in shared memory
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|
293 do { |
201d017ea470
slab allocator in shared memory
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|
294 if ((page->slab & NGX_SLAB_MAP_MASK) != mask) { |
201d017ea470
slab allocator in shared memory
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|
295 |
881
5ed08a4c3bd3
fix building on 64-bit platforms
Igor Sysoev <igor@sysoev.ru>
parents:
860
diff
changeset
|
296 for (m = (uintptr_t) 1 << NGX_SLAB_MAP_SHIFT, i = 0; |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
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|
297 m & mask; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
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|
298 m <<= 1, i++) |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
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|
299 { |
201d017ea470
slab allocator in shared memory
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|
300 if ((page->slab & m)) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
301 continue; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
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|
302 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
303 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
304 page->slab |= m; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
305 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
306 if ((page->slab & NGX_SLAB_MAP_MASK) == mask) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
307 prev = (ngx_slab_page_t *) |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
308 (page->prev & ~NGX_SLAB_PAGE_MASK); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
309 prev->next = page->next; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
310 page->next->prev = page->prev; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
311 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
312 page->next = NULL; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
313 page->prev = NGX_SLAB_BIG; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
314 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
315 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
316 p = (page - pool->pages) << ngx_pagesize_shift; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
317 p += i << shift; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
318 p += (uintptr_t) pool->start; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
319 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
320 goto done; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
321 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
322 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
323 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
324 page = page->next; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
325 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
326 } while (page); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
327 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
328 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
329 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
330 page = ngx_slab_alloc_pages(pool, 1); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
331 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
332 if (page) { |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
333 if (shift < ngx_slab_exact_shift) { |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
334 p = (page - pool->pages) << ngx_pagesize_shift; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
335 bitmap = (uintptr_t *) (pool->start + p); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
336 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
337 s = 1 << shift; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
338 n = (1 << (ngx_pagesize_shift - shift)) / 8 / s; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
339 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
340 if (n == 0) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
341 n = 1; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
342 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
343 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
344 bitmap[0] = (2 << n) - 1; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
345 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
346 map = (1 << (ngx_pagesize_shift - shift)) / (sizeof(uintptr_t) * 8); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
347 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
348 for (i = 1; i < map; i++) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
349 bitmap[i] = 0; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
350 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
351 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
352 page->slab = shift; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
353 page->next = &slots[slot]; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
354 page->prev = (uintptr_t) &slots[slot] | NGX_SLAB_SMALL; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
355 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
356 slots[slot].next = page; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
357 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
358 p = ((page - pool->pages) << ngx_pagesize_shift) + s * n; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
359 p += (uintptr_t) pool->start; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
360 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
361 goto done; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
362 |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
363 } else if (shift == ngx_slab_exact_shift) { |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
364 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
365 page->slab = 1; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
366 page->next = &slots[slot]; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
367 page->prev = (uintptr_t) &slots[slot] | NGX_SLAB_EXACT; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
368 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
369 slots[slot].next = page; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
370 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
371 p = (page - pool->pages) << ngx_pagesize_shift; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
372 p += (uintptr_t) pool->start; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
373 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
374 goto done; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
375 |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
376 } else { /* shift > ngx_slab_exact_shift */ |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
377 |
881
5ed08a4c3bd3
fix building on 64-bit platforms
Igor Sysoev <igor@sysoev.ru>
parents:
860
diff
changeset
|
378 page->slab = ((uintptr_t) 1 << NGX_SLAB_MAP_SHIFT) | shift; |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
379 page->next = &slots[slot]; |
201d017ea470
slab allocator in shared memory
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parents:
826
diff
changeset
|
380 page->prev = (uintptr_t) &slots[slot] | NGX_SLAB_BIG; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
381 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
382 slots[slot].next = page; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
383 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
384 p = (page - pool->pages) << ngx_pagesize_shift; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
385 p += (uintptr_t) pool->start; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
386 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
387 goto done; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
388 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
389 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
390 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
391 p = 0; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
392 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
393 done: |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
394 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
395 ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, ngx_cycle->log, 0, "slab alloc: %p", p); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
396 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
397 return (void *) p; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
398 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
399 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
400 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
401 void |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
402 ngx_slab_free(ngx_slab_pool_t *pool, void *p) |
357
e260514b9ad4
nginx-0.0.7-2004-06-16-23:36:07 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
403 { |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
404 ngx_shmtx_lock(&pool->mutex); |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
405 |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
406 ngx_slab_free_locked(pool, p); |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
407 |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
408 ngx_shmtx_unlock(&pool->mutex); |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
409 } |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
410 |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
411 |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
412 void |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
413 ngx_slab_free_locked(ngx_slab_pool_t *pool, void *p) |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
414 { |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
415 size_t size; |
1018
06306a20b8bb
fix slab allocator on 64-bit platfroms
Igor Sysoev <igor@sysoev.ru>
parents:
1016
diff
changeset
|
416 uintptr_t slab, m, *bitmap; |
06306a20b8bb
fix slab allocator on 64-bit platfroms
Igor Sysoev <igor@sysoev.ru>
parents:
1016
diff
changeset
|
417 ngx_uint_t n, type, slot, shift, map; |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
418 ngx_slab_page_t *slots, *page; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
419 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
420 ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, ngx_cycle->log, 0, "slab free: %p", p); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
421 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
422 if ((u_char *) p < pool->start || (u_char *) p > pool->end) { |
2611
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
423 ngx_slab_error(pool, NGX_LOG_ALERT, "ngx_slab_free(): outside of pool"); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
424 goto fail; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
425 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
426 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
427 n = ((u_char *) p - pool->start) >> ngx_pagesize_shift; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
428 page = &pool->pages[n]; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
429 slab = page->slab; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
430 type = page->prev & NGX_SLAB_PAGE_MASK; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
431 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
432 switch (type) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
433 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
434 case NGX_SLAB_SMALL: |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
435 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
436 shift = slab & NGX_SLAB_SHIFT_MASK; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
437 size = 1 << shift; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
438 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
439 if ((uintptr_t) p & (size - 1)) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
440 goto wrong_chunk; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
441 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
442 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
443 n = ((uintptr_t) p & (ngx_pagesize - 1)) >> shift; |
1016
d0e8c81d3bb7
fix slab allocator on 64-bit platfroms
Igor Sysoev <igor@sysoev.ru>
parents:
967
diff
changeset
|
444 m = (uintptr_t) 1 << (n & (sizeof(uintptr_t) * 8 - 1)); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
445 n /= (sizeof(uintptr_t) * 8); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
446 bitmap = (uintptr_t *) ((uintptr_t) p & ~(ngx_pagesize - 1)); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
447 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
448 if (bitmap[n] & m) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
449 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
450 if (page->next == NULL) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
451 slots = (ngx_slab_page_t *) |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
452 ((u_char *) pool + sizeof(ngx_slab_pool_t)); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
453 slot = shift - pool->min_shift; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
454 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
455 page->next = slots[slot].next; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
456 slots[slot].next = page; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
457 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
458 page->prev = (uintptr_t) &slots[slot] | NGX_SLAB_SMALL; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
459 page->next->prev = (uintptr_t) page | NGX_SLAB_SMALL; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
460 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
461 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
462 bitmap[n] &= ~m; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
463 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
464 n = (1 << (ngx_pagesize_shift - shift)) / 8 / (1 << shift); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
465 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
466 if (n == 0) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
467 n = 1; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
468 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
469 |
1016
d0e8c81d3bb7
fix slab allocator on 64-bit platfroms
Igor Sysoev <igor@sysoev.ru>
parents:
967
diff
changeset
|
470 if (bitmap[0] & ~(((uintptr_t) 1 << n) - 1)) { |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
471 goto done; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
472 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
473 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
474 map = (1 << (ngx_pagesize_shift - shift)) / (sizeof(uintptr_t) * 8); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
475 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
476 for (n = 1; n < map; n++) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
477 if (bitmap[n]) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
478 goto done; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
479 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
480 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
481 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
482 ngx_slab_free_pages(pool, page, 1); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
483 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
484 goto done; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
485 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
486 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
487 goto chunk_already_free; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
488 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
489 case NGX_SLAB_EXACT: |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
490 |
1016
d0e8c81d3bb7
fix slab allocator on 64-bit platfroms
Igor Sysoev <igor@sysoev.ru>
parents:
967
diff
changeset
|
491 m = (uintptr_t) 1 << |
d0e8c81d3bb7
fix slab allocator on 64-bit platfroms
Igor Sysoev <igor@sysoev.ru>
parents:
967
diff
changeset
|
492 (((uintptr_t) p & (ngx_pagesize - 1)) >> ngx_slab_exact_shift); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
493 size = ngx_slab_exact_size; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
494 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
495 if ((uintptr_t) p & (size - 1)) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
496 goto wrong_chunk; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
497 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
498 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
499 if (slab & m) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
500 if (slab == NGX_SLAB_BUSY) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
501 slots = (ngx_slab_page_t *) |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
502 ((u_char *) pool + sizeof(ngx_slab_pool_t)); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
503 slot = ngx_slab_exact_shift - pool->min_shift; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
504 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
505 page->next = slots[slot].next; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
506 slots[slot].next = page; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
507 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
508 page->prev = (uintptr_t) &slots[slot] | NGX_SLAB_EXACT; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
509 page->next->prev = (uintptr_t) page | NGX_SLAB_EXACT; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
510 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
511 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
512 page->slab &= ~m; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
513 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
514 if (page->slab) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
515 goto done; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
516 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
517 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
518 ngx_slab_free_pages(pool, page, 1); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
519 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
520 goto done; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
521 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
522 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
523 goto chunk_already_free; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
524 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
525 case NGX_SLAB_BIG: |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
526 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
527 shift = slab & NGX_SLAB_SHIFT_MASK; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
528 size = 1 << shift; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
529 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
530 if ((uintptr_t) p & (size - 1)) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
531 goto wrong_chunk; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
532 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
533 |
1016
d0e8c81d3bb7
fix slab allocator on 64-bit platfroms
Igor Sysoev <igor@sysoev.ru>
parents:
967
diff
changeset
|
534 m = (uintptr_t) 1 << ((((uintptr_t) p & (ngx_pagesize - 1)) >> shift) |
d0e8c81d3bb7
fix slab allocator on 64-bit platfroms
Igor Sysoev <igor@sysoev.ru>
parents:
967
diff
changeset
|
535 + NGX_SLAB_MAP_SHIFT); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
536 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
537 if (slab & m) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
538 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
539 if (page->next == NULL) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
540 slots = (ngx_slab_page_t *) |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
541 ((u_char *) pool + sizeof(ngx_slab_pool_t)); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
542 slot = shift - pool->min_shift; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
543 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
544 page->next = slots[slot].next; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
545 slots[slot].next = page; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
546 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
547 page->prev = (uintptr_t) &slots[slot] | NGX_SLAB_BIG; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
548 page->next->prev = (uintptr_t) page | NGX_SLAB_BIG; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
549 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
550 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
551 page->slab &= ~m; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
552 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
553 if (page->slab & NGX_SLAB_MAP_MASK) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
554 goto done; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
555 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
556 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
557 ngx_slab_free_pages(pool, page, 1); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
558 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
559 goto done; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
560 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
561 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
562 goto chunk_already_free; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
563 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
564 case NGX_SLAB_PAGE: |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
565 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
566 if ((uintptr_t) p & (ngx_pagesize - 1)) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
567 goto wrong_chunk; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
568 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
569 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
570 if (slab == NGX_SLAB_PAGE_FREE) { |
2611
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
571 ngx_slab_error(pool, NGX_LOG_ALERT, |
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
572 "ngx_slab_free(): page is already free"); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
573 goto fail; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
574 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
575 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
576 if (slab == NGX_SLAB_PAGE_BUSY) { |
2611
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
577 ngx_slab_error(pool, NGX_LOG_ALERT, |
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
578 "ngx_slab_free(): pointer to wrong page"); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
579 goto fail; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
580 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
581 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
582 n = ((u_char *) p - pool->start) >> ngx_pagesize_shift; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
583 size = slab & ~NGX_SLAB_PAGE_START; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
584 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
585 ngx_slab_free_pages(pool, &pool->pages[n], size); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
586 |
2711
6b87e875e87a
fix building by BCC without NGX_DEBUG_MALLOC
Igor Sysoev <igor@sysoev.ru>
parents:
2611
diff
changeset
|
587 ngx_slab_junk(p, size << ngx_pagesize_shift); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
588 |
2711
6b87e875e87a
fix building by BCC without NGX_DEBUG_MALLOC
Igor Sysoev <igor@sysoev.ru>
parents:
2611
diff
changeset
|
589 return; |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
590 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
591 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
592 /* not reached */ |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
593 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
594 return; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
595 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
596 done: |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
597 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
598 ngx_slab_junk(p, size); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
599 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
600 return; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
601 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
602 wrong_chunk: |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
603 |
2611
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
604 ngx_slab_error(pool, NGX_LOG_ALERT, |
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
605 "ngx_slab_free(): pointer to wrong chunk"); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
606 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
607 goto fail; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
608 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
609 chunk_already_free: |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
610 |
2611
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
611 ngx_slab_error(pool, NGX_LOG_ALERT, |
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
612 "ngx_slab_free(): chunk is already free"); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
613 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
614 fail: |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
615 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
616 return; |
357
e260514b9ad4
nginx-0.0.7-2004-06-16-23:36:07 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
617 } |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
618 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
619 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
620 static ngx_slab_page_t * |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
621 ngx_slab_alloc_pages(ngx_slab_pool_t *pool, ngx_uint_t pages) |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
622 { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
623 ngx_slab_page_t *page, *p; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
624 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
625 for (page = pool->free.next; page != &pool->free; page = page->next) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
626 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
627 if (page->slab >= pages) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
628 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
629 if (page->slab > pages) { |
201d017ea470
slab allocator in shared memory
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630 page[pages].slab = page->slab - pages; |
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631 page[pages].next = page->next; |
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632 page[pages].prev = page->prev; |
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633 |
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634 p = (ngx_slab_page_t *) page->prev; |
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635 p->next = &page[pages]; |
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636 page->next->prev = (uintptr_t) &page[pages]; |
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637 |
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638 } else { |
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639 p = (ngx_slab_page_t *) page->prev; |
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640 p->next = page->next; |
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641 page->next->prev = page->prev; |
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642 } |
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643 |
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644 page->slab = pages | NGX_SLAB_PAGE_START; |
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645 page->next = NULL; |
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646 page->prev = NGX_SLAB_PAGE; |
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647 |
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648 if (--pages == 0) { |
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649 return page; |
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650 } |
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651 |
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652 for (p = page + 1; pages; pages--) { |
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653 p->slab = NGX_SLAB_PAGE_BUSY; |
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654 p->next = NULL; |
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655 p->prev = NGX_SLAB_PAGE; |
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656 p++; |
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657 } |
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658 |
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659 return page; |
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660 } |
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661 } |
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662 |
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663 ngx_slab_error(pool, NGX_LOG_CRIT, "ngx_slab_alloc() failed: no memory"); |
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664 |
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665 return NULL; |
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666 } |
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667 |
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668 |
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669 static void |
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670 ngx_slab_free_pages(ngx_slab_pool_t *pool, ngx_slab_page_t *page, |
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671 ngx_uint_t pages) |
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672 { |
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673 ngx_slab_page_t *prev; |
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674 |
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675 page->slab = pages--; |
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676 |
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677 if (pages) { |
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678 ngx_memzero(&page[1], pages * sizeof(ngx_slab_page_t)); |
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679 } |
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680 |
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681 if (page->next) { |
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682 prev = (ngx_slab_page_t *) (page->prev & ~NGX_SLAB_PAGE_MASK); |
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683 prev->next = page->next; |
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684 page->next->prev = page->prev; |
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685 } |
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686 |
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687 page->prev = (uintptr_t) &pool->free; |
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688 page->next = pool->free.next; |
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689 |
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690 page->next->prev = (uintptr_t) page; |
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691 |
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692 pool->free.next = page; |
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693 } |
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694 |
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695 |
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696 static void |
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697 ngx_slab_error(ngx_slab_pool_t *pool, ngx_uint_t level, char *text) |
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698 { |
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699 ngx_log_error(level, ngx_cycle->log, 0, "%s%s", text, pool->log_ctx); |
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700 } |