Mercurial > hg > nginx
annotate src/core/ngx_slab.c @ 2610:3a9b22405138
delete old debugging and info
author | Igor Sysoev <igor@sysoev.ru> |
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date | Fri, 27 Mar 2009 16:37:39 +0000 |
parents | ae3bfe9aa093 |
children | 2bce3f6416c6 |
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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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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56 #define ngx_slab_junk(p, size) |
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57 |
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58 #endif |
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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 |
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67 |
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68 static ngx_uint_t ngx_slab_max_size; |
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69 static ngx_uint_t ngx_slab_exact_size; |
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70 static ngx_uint_t ngx_slab_exact_shift; |
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71 |
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72 |
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73 void |
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74 ngx_slab_init(ngx_slab_pool_t *pool) |
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75 { |
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76 u_char *p; |
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77 size_t size; |
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78 ngx_int_t m; |
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79 ngx_uint_t i, n, pages; |
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80 ngx_slab_page_t *slots; |
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81 |
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82 /* STUB */ |
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83 if (ngx_slab_max_size == 0) { |
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84 ngx_slab_max_size = ngx_pagesize / 2; |
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85 ngx_slab_exact_size = ngx_pagesize / (8 * sizeof(uintptr_t)); |
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86 for (n = ngx_slab_exact_size; n >>= 1; ngx_slab_exact_shift++) { |
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87 /* void */ |
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88 } |
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89 } |
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90 /**/ |
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91 |
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92 pool->min_size = 1 << pool->min_shift; |
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93 |
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94 p = (u_char *) pool + sizeof(ngx_slab_pool_t); |
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95 size = pool->end - p; |
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96 |
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97 ngx_slab_junk(p, size); |
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98 |
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99 slots = (ngx_slab_page_t *) p; |
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100 n = ngx_pagesize_shift - pool->min_shift; |
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101 |
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102 for (i = 0; i < n; i++) { |
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103 slots[i].slab = 0; |
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104 slots[i].next = &slots[i]; |
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105 slots[i].prev = 0; |
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106 } |
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107 |
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108 p += n * sizeof(ngx_slab_page_t); |
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109 |
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110 pages = (ngx_uint_t) (size / (ngx_pagesize + sizeof(ngx_slab_page_t))); |
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111 |
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112 ngx_memzero(p, pages * sizeof(ngx_slab_page_t)); |
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113 |
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114 pool->pages = (ngx_slab_page_t *) p; |
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115 |
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116 pool->free.prev = 0; |
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117 pool->free.next = (ngx_slab_page_t *) p; |
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118 |
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119 pool->pages->slab = pages; |
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120 pool->pages->next = &pool->free; |
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121 pool->pages->prev = (uintptr_t) &pool->free; |
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122 |
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123 pool->start = (u_char *) |
1016
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124 ngx_align_ptr((uintptr_t) p + pages * sizeof(ngx_slab_page_t), |
860
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125 ngx_pagesize); |
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126 |
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127 m = pages - (pool->end - pool->start) / ngx_pagesize; |
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128 if (m > 0) { |
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129 pages -= m; |
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130 pool->pages->slab = pages; |
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131 } |
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132 } |
357
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nginx-0.0.7-2004-06-16-23:36:07 import
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133 |
e260514b9ad4
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134 |
860
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135 void * |
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136 ngx_slab_alloc(ngx_slab_pool_t *pool, size_t size) |
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137 { |
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138 void *p; |
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139 |
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140 ngx_shmtx_lock(&pool->mutex); |
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141 |
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|
142 p = ngx_slab_alloc_locked(pool, size); |
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143 |
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144 ngx_shmtx_unlock(&pool->mutex); |
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145 |
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146 return p; |
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147 } |
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148 |
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149 |
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150 void * |
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151 ngx_slab_alloc_locked(ngx_slab_pool_t *pool, size_t size) |
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152 { |
860
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153 size_t s; |
881
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154 uintptr_t p, n, m, mask, *bitmap; |
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fix building on 64-bit platforms
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155 ngx_uint_t i, slot, shift, map; |
860
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156 ngx_slab_page_t *page, *prev, *slots; |
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157 |
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158 if (size >= ngx_slab_max_size) { |
860
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159 |
966
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160 ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, ngx_cycle->log, 0, |
967 | 161 "slab alloc: %uz", size); |
966
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162 |
860
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163 page = ngx_slab_alloc_pages(pool, (size + ngx_pagesize - 1) |
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164 >> ngx_pagesize_shift); |
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165 if (page) { |
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166 p = (page - pool->pages) << ngx_pagesize_shift; |
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167 p += (uintptr_t) pool->start; |
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168 |
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169 } else { |
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170 p = 0; |
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171 } |
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172 |
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173 goto done; |
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|
174 } |
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175 |
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|
176 if (size > pool->min_size) { |
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|
177 shift = 1; |
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|
178 for (s = size - 1; s >>= 1; shift++) { /* void */ } |
201d017ea470
slab allocator in shared memory
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|
179 slot = shift - pool->min_shift; |
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|
180 |
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181 } else { |
201d017ea470
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|
182 size = pool->min_size; |
201d017ea470
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|
183 shift = pool->min_shift; |
201d017ea470
slab allocator in shared memory
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|
184 slot = 0; |
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|
185 } |
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|
186 |
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|
187 ngx_log_debug2(NGX_LOG_DEBUG_ALLOC, ngx_cycle->log, 0, |
201d017ea470
slab allocator in shared memory
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|
188 "slab alloc: %uz slot: %ui", size, slot); |
201d017ea470
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|
189 |
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190 slots = (ngx_slab_page_t *) ((u_char *) pool + sizeof(ngx_slab_pool_t)); |
201d017ea470
slab allocator in shared memory
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|
191 page = slots[slot].next; |
201d017ea470
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|
192 |
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|
193 if (page->next != page) { |
201d017ea470
slab allocator in shared memory
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|
194 |
966
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parents:
881
diff
changeset
|
195 if (shift < ngx_slab_exact_shift) { |
860
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|
196 |
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|
197 do { |
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|
198 p = (page - pool->pages) << ngx_pagesize_shift; |
201d017ea470
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|
199 bitmap = (uintptr_t *) (pool->start + p); |
201d017ea470
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changeset
|
200 |
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slab allocator in shared memory
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diff
changeset
|
201 map = (1 << (ngx_pagesize_shift - shift)) |
201d017ea470
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|
202 / (sizeof(uintptr_t) * 8); |
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|
203 |
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|
204 for (n = 0; n < map; n++) { |
201d017ea470
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|
205 |
201d017ea470
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|
206 if (bitmap[n] != NGX_SLAB_BUSY) { |
201d017ea470
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|
207 |
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|
208 for (m = 1, i = 0; m; m <<= 1, i++) { |
201d017ea470
slab allocator in shared memory
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|
209 if ((bitmap[n] & m)) { |
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slab allocator in shared memory
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|
210 continue; |
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|
211 } |
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|
212 |
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changeset
|
213 bitmap[n] |= m; |
966
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many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
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diff
changeset
|
214 |
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diff
changeset
|
215 i = ((n * sizeof(uintptr_t) * 8) << shift) |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
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diff
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|
216 + (i << shift); |
860
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|
217 |
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|
218 if (bitmap[n] == NGX_SLAB_BUSY) { |
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|
219 for (n = n + 1; n < map; n++) { |
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220 if (bitmap[n] != NGX_SLAB_BUSY) { |
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|
221 p = (uintptr_t) bitmap + i; |
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|
222 |
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223 goto done; |
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|
224 } |
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|
225 } |
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|
226 |
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diff
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|
227 prev = (ngx_slab_page_t *) |
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slab allocator in shared memory
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diff
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|
228 (page->prev & ~NGX_SLAB_PAGE_MASK); |
201d017ea470
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|
229 prev->next = page->next; |
201d017ea470
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|
230 page->next->prev = page->prev; |
201d017ea470
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|
231 |
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|
232 page->next = NULL; |
201d017ea470
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|
233 page->prev = NGX_SLAB_SMALL; |
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234 } |
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|
235 |
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|
236 p = (uintptr_t) bitmap + i; |
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|
237 |
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|
238 goto done; |
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|
239 } |
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|
240 } |
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|
241 } |
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|
242 |
201d017ea470
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|
243 page = page->next; |
201d017ea470
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|
244 |
201d017ea470
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|
245 } while (page); |
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|
246 |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
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parents:
881
diff
changeset
|
247 } else if (shift == ngx_slab_exact_shift) { |
860
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248 |
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249 do { |
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250 if (page->slab != NGX_SLAB_BUSY) { |
201d017ea470
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251 |
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252 for (m = 1, i = 0; m; m <<= 1, i++) { |
201d017ea470
slab allocator in shared memory
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253 if ((page->slab & m)) { |
201d017ea470
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|
254 continue; |
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slab allocator in shared memory
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|
255 } |
201d017ea470
slab allocator in shared memory
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|
256 |
201d017ea470
slab allocator in shared memory
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|
257 page->slab |= m; |
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slab allocator in shared memory
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|
258 |
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slab allocator in shared memory
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|
259 if (page->slab == NGX_SLAB_BUSY) { |
201d017ea470
slab allocator in shared memory
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260 prev = (ngx_slab_page_t *) |
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slab allocator in shared memory
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|
261 (page->prev & ~NGX_SLAB_PAGE_MASK); |
201d017ea470
slab allocator in shared memory
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parents:
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|
262 prev->next = page->next; |
201d017ea470
slab allocator in shared memory
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parents:
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|
263 page->next->prev = page->prev; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
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|
264 |
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slab allocator in shared memory
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|
265 page->next = NULL; |
201d017ea470
slab allocator in shared memory
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266 page->prev = NGX_SLAB_EXACT; |
201d017ea470
slab allocator in shared memory
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|
267 } |
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|
268 |
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|
269 p = (page - pool->pages) << ngx_pagesize_shift; |
201d017ea470
slab allocator in shared memory
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270 p += i << shift; |
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271 p += (uintptr_t) pool->start; |
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|
272 |
201d017ea470
slab allocator in shared memory
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273 goto done; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
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|
274 } |
201d017ea470
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|
275 } |
201d017ea470
slab allocator in shared memory
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|
276 |
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|
277 page = page->next; |
201d017ea470
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|
278 |
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|
279 } while (page); |
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280 |
966
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many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
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parents:
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281 } else { /* shift > ngx_slab_exact_shift */ |
860
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|
282 |
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283 n = ngx_pagesize_shift - (page->slab & NGX_SLAB_SHIFT_MASK); |
201d017ea470
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|
284 n = 1 << n; |
1016
d0e8c81d3bb7
fix slab allocator on 64-bit platfroms
Igor Sysoev <igor@sysoev.ru>
parents:
967
diff
changeset
|
285 n = ((uintptr_t) 1 << n) - 1; |
860
201d017ea470
slab allocator in shared memory
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286 mask = n << NGX_SLAB_MAP_SHIFT; |
201d017ea470
slab allocator in shared memory
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|
287 |
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slab allocator in shared memory
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|
288 do { |
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slab allocator in shared memory
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|
289 if ((page->slab & NGX_SLAB_MAP_MASK) != mask) { |
201d017ea470
slab allocator in shared memory
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|
290 |
881
5ed08a4c3bd3
fix building on 64-bit platforms
Igor Sysoev <igor@sysoev.ru>
parents:
860
diff
changeset
|
291 for (m = (uintptr_t) 1 << NGX_SLAB_MAP_SHIFT, i = 0; |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
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|
292 m & mask; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
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|
293 m <<= 1, i++) |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
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|
294 { |
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|
295 if ((page->slab & m)) { |
201d017ea470
slab allocator in shared memory
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|
296 continue; |
201d017ea470
slab allocator in shared memory
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|
297 } |
201d017ea470
slab allocator in shared memory
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|
298 |
201d017ea470
slab allocator in shared memory
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|
299 page->slab |= m; |
201d017ea470
slab allocator in shared memory
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changeset
|
300 |
201d017ea470
slab allocator in shared memory
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changeset
|
301 if ((page->slab & NGX_SLAB_MAP_MASK) == mask) { |
201d017ea470
slab allocator in shared memory
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|
302 prev = (ngx_slab_page_t *) |
201d017ea470
slab allocator in shared memory
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|
303 (page->prev & ~NGX_SLAB_PAGE_MASK); |
201d017ea470
slab allocator in shared memory
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parents:
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diff
changeset
|
304 prev->next = page->next; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
305 page->next->prev = page->prev; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
306 |
201d017ea470
slab allocator in shared memory
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diff
changeset
|
307 page->next = NULL; |
201d017ea470
slab allocator in shared memory
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parents:
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diff
changeset
|
308 page->prev = NGX_SLAB_BIG; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
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|
309 } |
201d017ea470
slab allocator in shared memory
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parents:
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changeset
|
310 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
311 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
|
312 p += i << shift; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
313 p += (uintptr_t) pool->start; |
201d017ea470
slab allocator in shared memory
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parents:
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diff
changeset
|
314 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
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diff
changeset
|
315 goto done; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
316 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
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diff
changeset
|
317 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
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diff
changeset
|
318 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
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diff
changeset
|
319 page = page->next; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
320 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
321 } while (page); |
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:
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diff
changeset
|
324 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
325 page = ngx_slab_alloc_pages(pool, 1); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
326 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
327 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
|
328 if (shift < ngx_slab_exact_shift) { |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
329 p = (page - pool->pages) << ngx_pagesize_shift; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
330 bitmap = (uintptr_t *) (pool->start + p); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
331 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
332 s = 1 << shift; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
333 n = (1 << (ngx_pagesize_shift - shift)) / 8 / s; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
334 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
335 if (n == 0) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
336 n = 1; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
337 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
338 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
339 bitmap[0] = (2 << n) - 1; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
340 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
341 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
|
342 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
343 for (i = 1; i < map; i++) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
344 bitmap[i] = 0; |
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 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
347 page->slab = shift; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
348 page->next = &slots[slot]; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
349 page->prev = (uintptr_t) &slots[slot] | NGX_SLAB_SMALL; |
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 slots[slot].next = page; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
352 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
353 p = ((page - pool->pages) << ngx_pagesize_shift) + s * n; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
354 p += (uintptr_t) pool->start; |
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 goto done; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
357 |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
358 } else if (shift == ngx_slab_exact_shift) { |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
359 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
360 page->slab = 1; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
361 page->next = &slots[slot]; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
362 page->prev = (uintptr_t) &slots[slot] | NGX_SLAB_EXACT; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
363 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
364 slots[slot].next = page; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
365 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
366 p = (page - pool->pages) << ngx_pagesize_shift; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
367 p += (uintptr_t) pool->start; |
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 goto done; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
370 |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
371 } else { /* shift > ngx_slab_exact_shift */ |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
372 |
881
5ed08a4c3bd3
fix building on 64-bit platforms
Igor Sysoev <igor@sysoev.ru>
parents:
860
diff
changeset
|
373 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
|
374 page->next = &slots[slot]; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
375 page->prev = (uintptr_t) &slots[slot] | NGX_SLAB_BIG; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
376 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
377 slots[slot].next = page; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
378 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
379 p = (page - pool->pages) << ngx_pagesize_shift; |
201d017ea470
slab allocator in shared memory
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parents:
826
diff
changeset
|
380 p += (uintptr_t) pool->start; |
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 goto done; |
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 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
385 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
386 p = 0; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
387 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
388 done: |
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 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
|
391 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
392 return (void *) p; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
393 } |
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 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
396 void |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
397 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
|
398 { |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
399 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
|
400 |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
401 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
|
402 |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
403 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
|
404 } |
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 |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
407 void |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
408 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
|
409 { |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
410 size_t size; |
1018
06306a20b8bb
fix slab allocator on 64-bit platfroms
Igor Sysoev <igor@sysoev.ru>
parents:
1016
diff
changeset
|
411 uintptr_t slab, m, *bitmap; |
06306a20b8bb
fix slab allocator on 64-bit platfroms
Igor Sysoev <igor@sysoev.ru>
parents:
1016
diff
changeset
|
412 ngx_uint_t n, type, slot, shift, map; |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
413 ngx_slab_page_t *slots, *page; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
414 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
415 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
|
416 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
417 if ((u_char *) p < pool->start || (u_char *) p > pool->end) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
418 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0, |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
419 "ngx_slab_free(): outside of pool"); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
420 goto fail; |
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 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
423 n = ((u_char *) p - pool->start) >> ngx_pagesize_shift; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
424 page = &pool->pages[n]; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
425 slab = page->slab; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
426 type = page->prev & NGX_SLAB_PAGE_MASK; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
427 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
428 switch (type) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
429 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
430 case NGX_SLAB_SMALL: |
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 shift = slab & NGX_SLAB_SHIFT_MASK; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
433 size = 1 << shift; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
434 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
435 if ((uintptr_t) p & (size - 1)) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
436 goto wrong_chunk; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
437 } |
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 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
|
440 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
|
441 n /= (sizeof(uintptr_t) * 8); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
442 bitmap = (uintptr_t *) ((uintptr_t) p & ~(ngx_pagesize - 1)); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
443 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
444 if (bitmap[n] & m) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
445 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
446 if (page->next == NULL) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
447 slots = (ngx_slab_page_t *) |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
448 ((u_char *) pool + sizeof(ngx_slab_pool_t)); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
449 slot = shift - pool->min_shift; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
450 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
451 page->next = slots[slot].next; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
452 slots[slot].next = page; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
453 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
454 page->prev = (uintptr_t) &slots[slot] | NGX_SLAB_SMALL; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
455 page->next->prev = (uintptr_t) page | NGX_SLAB_SMALL; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
456 } |
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 bitmap[n] &= ~m; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
459 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
460 n = (1 << (ngx_pagesize_shift - shift)) / 8 / (1 << shift); |
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 if (n == 0) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
463 n = 1; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
464 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
465 |
1016
d0e8c81d3bb7
fix slab allocator on 64-bit platfroms
Igor Sysoev <igor@sysoev.ru>
parents:
967
diff
changeset
|
466 if (bitmap[0] & ~(((uintptr_t) 1 << n) - 1)) { |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
467 goto done; |
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 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
470 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
|
471 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
472 for (n = 1; n < map; n++) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
473 if (bitmap[n]) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
474 goto done; |
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 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
477 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
478 ngx_slab_free_pages(pool, page, 1); |
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 goto done; |
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 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
483 goto chunk_already_free; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
484 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
485 case NGX_SLAB_EXACT: |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
486 |
1016
d0e8c81d3bb7
fix slab allocator on 64-bit platfroms
Igor Sysoev <igor@sysoev.ru>
parents:
967
diff
changeset
|
487 m = (uintptr_t) 1 << |
d0e8c81d3bb7
fix slab allocator on 64-bit platfroms
Igor Sysoev <igor@sysoev.ru>
parents:
967
diff
changeset
|
488 (((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
|
489 size = ngx_slab_exact_size; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
490 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
491 if ((uintptr_t) p & (size - 1)) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
492 goto wrong_chunk; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
493 } |
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 (slab & m) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
496 if (slab == NGX_SLAB_BUSY) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
497 slots = (ngx_slab_page_t *) |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
498 ((u_char *) pool + sizeof(ngx_slab_pool_t)); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
499 slot = ngx_slab_exact_shift - pool->min_shift; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
500 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
501 page->next = slots[slot].next; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
502 slots[slot].next = page; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
503 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
504 page->prev = (uintptr_t) &slots[slot] | NGX_SLAB_EXACT; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
505 page->next->prev = (uintptr_t) page | NGX_SLAB_EXACT; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
506 } |
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->slab &= ~m; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
509 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
510 if (page->slab) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
511 goto done; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
512 } |
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 ngx_slab_free_pages(pool, page, 1); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
515 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
516 goto done; |
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 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
519 goto chunk_already_free; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
520 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
521 case NGX_SLAB_BIG: |
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 shift = slab & NGX_SLAB_SHIFT_MASK; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
524 size = 1 << shift; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
525 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
526 if ((uintptr_t) p & (size - 1)) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
527 goto wrong_chunk; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
528 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
529 |
1016
d0e8c81d3bb7
fix slab allocator on 64-bit platfroms
Igor Sysoev <igor@sysoev.ru>
parents:
967
diff
changeset
|
530 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
|
531 + NGX_SLAB_MAP_SHIFT); |
860
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 if (slab & m) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
534 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
535 if (page->next == NULL) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
536 slots = (ngx_slab_page_t *) |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
537 ((u_char *) pool + sizeof(ngx_slab_pool_t)); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
538 slot = shift - pool->min_shift; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
539 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
540 page->next = slots[slot].next; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
541 slots[slot].next = page; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
542 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
543 page->prev = (uintptr_t) &slots[slot] | NGX_SLAB_BIG; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
544 page->next->prev = (uintptr_t) page | NGX_SLAB_BIG; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
545 } |
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->slab &= ~m; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
548 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
549 if (page->slab & NGX_SLAB_MAP_MASK) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
550 goto done; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
551 } |
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 ngx_slab_free_pages(pool, page, 1); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
554 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
555 goto done; |
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 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
558 goto chunk_already_free; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
559 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
560 case NGX_SLAB_PAGE: |
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 if ((uintptr_t) p & (ngx_pagesize - 1)) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
563 goto wrong_chunk; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
564 } |
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 (slab == NGX_SLAB_PAGE_FREE) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
567 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0, |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
568 "ngx_slab_free(): page is already free"); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
569 goto fail; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
570 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
571 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
572 if (slab == NGX_SLAB_PAGE_BUSY) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
573 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0, |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
574 "ngx_slab_free(): pointer to wrong page"); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
575 goto fail; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
576 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
577 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
578 n = ((u_char *) p - pool->start) >> ngx_pagesize_shift; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
579 size = slab & ~NGX_SLAB_PAGE_START; |
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 ngx_slab_free_pages(pool, &pool->pages[n], size); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
582 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
583 size <<= ngx_pagesize_shift; |
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 goto done; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
586 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
587 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
588 /* not reached */ |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
589 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
590 return; |
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 done: |
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 ngx_slab_junk(p, size); |
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 return; |
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 wrong_chunk: |
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 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0, |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
601 "ngx_slab_free(): pointer to wrong chunk"); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
602 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
603 goto fail; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
604 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
605 chunk_already_free: |
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 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0, |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
608 "ngx_slab_free(): chunk is already free"); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
609 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
610 fail: |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
611 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
612 return; |
357
e260514b9ad4
nginx-0.0.7-2004-06-16-23:36:07 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
613 } |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
614 |
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 static ngx_slab_page_t * |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
617 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
|
618 { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
619 ngx_slab_page_t *page, *p; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
620 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
621 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
|
622 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
623 if (page->slab >= pages) { |
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 if (page->slab > pages) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
626 page[pages].slab = page->slab - pages; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
627 page[pages].next = page->next; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
628 page[pages].prev = page->prev; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
629 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
630 p = (ngx_slab_page_t *) page->prev; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
631 p->next = &page[pages]; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
632 page->next->prev = (uintptr_t) &page[pages]; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
633 |
201d017ea470
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634 } else { |
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635 p = (ngx_slab_page_t *) page->prev; |
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636 p->next = page->next; |
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637 page->next->prev = page->prev; |
201d017ea470
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638 } |
201d017ea470
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639 |
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640 page->slab = pages | NGX_SLAB_PAGE_START; |
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641 page->next = NULL; |
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642 page->prev = NGX_SLAB_PAGE; |
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parents:
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643 |
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644 if (--pages == 0) { |
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slab allocator in shared memory
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645 return page; |
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slab allocator in shared memory
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646 } |
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slab allocator in shared memory
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647 |
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slab allocator in shared memory
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648 for (p = page + 1; pages; pages--) { |
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649 p->slab = NGX_SLAB_PAGE_BUSY; |
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650 p->next = NULL; |
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651 p->prev = NGX_SLAB_PAGE; |
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652 p++; |
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653 } |
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654 |
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655 return page; |
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656 } |
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657 } |
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658 |
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659 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, NGX_ENOMEM, |
2437 | 660 "ngx_slab_alloc(): failed"); |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
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661 |
860
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662 return NULL; |
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663 } |
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664 |
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|
665 |
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666 static void |
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667 ngx_slab_free_pages(ngx_slab_pool_t *pool, ngx_slab_page_t *page, |
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668 ngx_uint_t pages) |
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669 { |
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670 ngx_slab_page_t *prev; |
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671 |
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672 page->slab = pages--; |
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673 |
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674 if (pages) { |
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675 ngx_memzero(&page[1], pages * sizeof(ngx_slab_page_t)); |
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676 } |
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677 |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
678 if (page->next) { |
715336c243e1
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Igor Sysoev <igor@sysoev.ru>
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679 prev = (ngx_slab_page_t *) (page->prev & ~NGX_SLAB_PAGE_MASK); |
715336c243e1
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Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
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680 prev->next = page->next; |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
681 page->next->prev = page->prev; |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
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682 } |
860
201d017ea470
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|
683 |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
684 page->prev = (uintptr_t) &pool->free; |
860
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685 page->next = pool->free.next; |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
686 |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
687 page->next->prev = (uintptr_t) page; |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
688 |
860
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689 pool->free.next = page; |
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690 } |