Mercurial > hg > nginx-quic
annotate src/core/ngx_slab.c @ 6939:633a36655bb6
Version bump.
author | Ruslan Ermilov <ru@nginx.com> |
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date | Wed, 22 Mar 2017 22:49:42 +0300 |
parents | e4590dfd97ff |
children | 94f30939545a |
rev | line source |
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
4412 | 4 * Copyright (C) Nginx, Inc. |
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5 */ |
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6 |
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7 #include <ngx_config.h> |
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8 #include <ngx_core.h> |
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9 |
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10 |
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11 #define NGX_SLAB_PAGE_MASK 3 |
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12 #define NGX_SLAB_PAGE 0 |
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13 #define NGX_SLAB_BIG 1 |
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14 #define NGX_SLAB_EXACT 2 |
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15 #define NGX_SLAB_SMALL 3 |
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16 |
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17 #if (NGX_PTR_SIZE == 4) |
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18 |
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19 #define NGX_SLAB_PAGE_FREE 0 |
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20 #define NGX_SLAB_PAGE_BUSY 0xffffffff |
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21 #define NGX_SLAB_PAGE_START 0x80000000 |
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22 |
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23 #define NGX_SLAB_SHIFT_MASK 0x0000000f |
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24 #define NGX_SLAB_MAP_MASK 0xffff0000 |
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25 #define NGX_SLAB_MAP_SHIFT 16 |
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26 |
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27 #define NGX_SLAB_BUSY 0xffffffff |
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28 |
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29 #else /* (NGX_PTR_SIZE == 8) */ |
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30 |
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31 #define NGX_SLAB_PAGE_FREE 0 |
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32 #define NGX_SLAB_PAGE_BUSY 0xffffffffffffffff |
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33 #define NGX_SLAB_PAGE_START 0x8000000000000000 |
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34 |
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35 #define NGX_SLAB_SHIFT_MASK 0x000000000000000f |
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36 #define NGX_SLAB_MAP_MASK 0xffffffff00000000 |
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37 #define NGX_SLAB_MAP_SHIFT 32 |
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38 |
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39 #define NGX_SLAB_BUSY 0xffffffffffffffff |
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40 |
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41 #endif |
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42 |
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43 |
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44 #define ngx_slab_slots(pool) \ |
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45 (ngx_slab_page_t *) ((u_char *) (pool) + sizeof(ngx_slab_pool_t)) |
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46 |
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47 #define ngx_slab_page_type(page) ((page)->prev & NGX_SLAB_PAGE_MASK) |
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48 |
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49 #define ngx_slab_page_prev(page) \ |
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50 (ngx_slab_page_t *) ((page)->prev & ~NGX_SLAB_PAGE_MASK) |
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51 |
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52 #define ngx_slab_page_addr(pool, page) \ |
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53 ((((page) - (pool)->pages) << ngx_pagesize_shift) \ |
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54 + (uintptr_t) (pool)->start) |
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55 |
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56 |
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57 #if (NGX_DEBUG_MALLOC) |
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58 |
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59 #define ngx_slab_junk(p, size) ngx_memset(p, 0xA5, size) |
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60 |
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61 #elif (NGX_HAVE_DEBUG_MALLOC) |
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62 |
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63 #define ngx_slab_junk(p, size) \ |
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64 if (ngx_debug_malloc) ngx_memset(p, 0xA5, size) |
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65 |
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66 #else |
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67 |
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68 #define ngx_slab_junk(p, size) |
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69 |
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70 #endif |
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71 |
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72 static ngx_slab_page_t *ngx_slab_alloc_pages(ngx_slab_pool_t *pool, |
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73 ngx_uint_t pages); |
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74 static void ngx_slab_free_pages(ngx_slab_pool_t *pool, ngx_slab_page_t *page, |
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75 ngx_uint_t pages); |
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76 static void ngx_slab_error(ngx_slab_pool_t *pool, ngx_uint_t level, |
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77 char *text); |
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78 |
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79 |
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80 static ngx_uint_t ngx_slab_max_size; |
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81 static ngx_uint_t ngx_slab_exact_size; |
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82 static ngx_uint_t ngx_slab_exact_shift; |
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83 |
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84 |
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85 void |
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86 ngx_slab_init(ngx_slab_pool_t *pool) |
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87 { |
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88 u_char *p; |
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89 size_t size; |
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90 ngx_int_t m; |
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91 ngx_uint_t i, n, pages; |
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92 ngx_slab_page_t *slots, *page; |
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93 |
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94 /* STUB */ |
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95 if (ngx_slab_max_size == 0) { |
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96 ngx_slab_max_size = ngx_pagesize / 2; |
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97 ngx_slab_exact_size = ngx_pagesize / (8 * sizeof(uintptr_t)); |
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98 for (n = ngx_slab_exact_size; n >>= 1; ngx_slab_exact_shift++) { |
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99 /* void */ |
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100 } |
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101 } |
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102 /**/ |
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103 |
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104 pool->min_size = (size_t) 1 << pool->min_shift; |
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105 |
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106 slots = ngx_slab_slots(pool); |
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107 |
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108 p = (u_char *) slots; |
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109 size = pool->end - p; |
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110 |
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111 ngx_slab_junk(p, size); |
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112 |
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113 n = ngx_pagesize_shift - pool->min_shift; |
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114 |
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115 for (i = 0; i < n; i++) { |
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116 /* only "next" is used in list head */ |
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117 slots[i].slab = 0; |
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118 slots[i].next = &slots[i]; |
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119 slots[i].prev = 0; |
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120 } |
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Igor Sysoev <igor@sysoev.ru>
parents:
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diff
changeset
|
121 |
201d017ea470
slab allocator in shared memory
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parents:
826
diff
changeset
|
122 p += n * sizeof(ngx_slab_page_t); |
6828 | 123 |
124 pool->stats = (ngx_slab_stat_t *) p; | |
125 ngx_memzero(pool->stats, n * sizeof(ngx_slab_stat_t)); | |
126 | |
127 p += n * sizeof(ngx_slab_stat_t); | |
128 | |
129 size -= n * (sizeof(ngx_slab_page_t) + sizeof(ngx_slab_stat_t)); | |
860
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slab allocator in shared memory
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parents:
826
diff
changeset
|
130 |
1645
31622d9f2c0d
the simple expression has the same precision without overflow
Igor Sysoev <igor@sysoev.ru>
parents:
1018
diff
changeset
|
131 pages = (ngx_uint_t) (size / (ngx_pagesize + sizeof(ngx_slab_page_t))); |
860
201d017ea470
slab allocator in shared memory
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parents:
826
diff
changeset
|
132 |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
133 pool->pages = (ngx_slab_page_t *) p; |
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
134 ngx_memzero(pool->pages, pages * sizeof(ngx_slab_page_t)); |
860
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slab allocator in shared memory
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parents:
826
diff
changeset
|
135 |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
136 page = pool->pages; |
860
201d017ea470
slab allocator in shared memory
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parents:
826
diff
changeset
|
137 |
6824
ea12328518dc
Slab: added comment about list heads.
Ruslan Ermilov <ru@nginx.com>
parents:
6823
diff
changeset
|
138 /* only "next" is used in list head */ |
ea12328518dc
Slab: added comment about list heads.
Ruslan Ermilov <ru@nginx.com>
parents:
6823
diff
changeset
|
139 pool->free.slab = 0; |
ea12328518dc
Slab: added comment about list heads.
Ruslan Ermilov <ru@nginx.com>
parents:
6823
diff
changeset
|
140 pool->free.next = page; |
860
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slab allocator in shared memory
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parents:
826
diff
changeset
|
141 pool->free.prev = 0; |
201d017ea470
slab allocator in shared memory
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parents:
826
diff
changeset
|
142 |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
143 page->slab = pages; |
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
144 page->next = &pool->free; |
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
145 page->prev = (uintptr_t) &pool->free; |
860
201d017ea470
slab allocator in shared memory
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parents:
826
diff
changeset
|
146 |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
147 pool->start = ngx_align_ptr(p + pages * sizeof(ngx_slab_page_t), |
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
148 ngx_pagesize); |
860
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diff
changeset
|
149 |
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diff
changeset
|
150 m = pages - (pool->end - pool->start) / ngx_pagesize; |
201d017ea470
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diff
changeset
|
151 if (m > 0) { |
201d017ea470
slab allocator in shared memory
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diff
changeset
|
152 pages -= m; |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
153 page->slab = pages; |
860
201d017ea470
slab allocator in shared memory
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parents:
826
diff
changeset
|
154 } |
2611
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
155 |
5718
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
156 pool->last = pool->pages + pages; |
6829
6e757036e588
Slab: free pages statistics.
Ruslan Ermilov <ru@nginx.com>
parents:
6828
diff
changeset
|
157 pool->pfree = pages; |
5718
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
158 |
5634
5024d29354f1
Core: slab log_nomem flag.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5362
diff
changeset
|
159 pool->log_nomem = 1; |
2611
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
160 pool->log_ctx = &pool->zero; |
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
161 pool->zero = '\0'; |
860
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slab allocator in shared memory
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parents:
826
diff
changeset
|
162 } |
357
e260514b9ad4
nginx-0.0.7-2004-06-16-23:36:07 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
163 |
e260514b9ad4
nginx-0.0.7-2004-06-16-23:36:07 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
164 |
860
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slab allocator in shared memory
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parents:
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diff
changeset
|
165 void * |
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diff
changeset
|
166 ngx_slab_alloc(ngx_slab_pool_t *pool, size_t size) |
201d017ea470
slab allocator in shared memory
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diff
changeset
|
167 { |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
168 void *p; |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
169 |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
170 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
|
171 |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
172 p = ngx_slab_alloc_locked(pool, size); |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
173 |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
174 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
|
175 |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
176 return p; |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
177 } |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
178 |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
179 |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
180 void * |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
181 ngx_slab_alloc_locked(ngx_slab_pool_t *pool, size_t size) |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
182 { |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
183 size_t s; |
881
5ed08a4c3bd3
fix building on 64-bit platforms
Igor Sysoev <igor@sysoev.ru>
parents:
860
diff
changeset
|
184 uintptr_t p, n, m, mask, *bitmap; |
5ed08a4c3bd3
fix building on 64-bit platforms
Igor Sysoev <igor@sysoev.ru>
parents:
860
diff
changeset
|
185 ngx_uint_t i, slot, shift, map; |
860
201d017ea470
slab allocator in shared memory
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parents:
826
diff
changeset
|
186 ngx_slab_page_t *page, *prev, *slots; |
201d017ea470
slab allocator in shared memory
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parents:
826
diff
changeset
|
187 |
5766
abdb027be9d5
Core: bugfix for the ngx_slab_max_size case.
Jianjun Zheng <codeeply@gmail.com>
parents:
5726
diff
changeset
|
188 if (size > ngx_slab_max_size) { |
860
201d017ea470
slab allocator in shared memory
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parents:
826
diff
changeset
|
189 |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
190 ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, ngx_cycle->log, 0, |
967 | 191 "slab alloc: %uz", size); |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
192 |
4829
40de49cf6b37
Fixed overflow if ngx_slab_alloc() is called with very big "size" argument.
Ruslan Ermilov <ru@nginx.com>
parents:
4764
diff
changeset
|
193 page = ngx_slab_alloc_pages(pool, (size >> ngx_pagesize_shift) |
40de49cf6b37
Fixed overflow if ngx_slab_alloc() is called with very big "size" argument.
Ruslan Ermilov <ru@nginx.com>
parents:
4764
diff
changeset
|
194 + ((size % ngx_pagesize) ? 1 : 0)); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
195 if (page) { |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
196 p = ngx_slab_page_addr(pool, page); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
197 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
198 } else { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
199 p = 0; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
200 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
201 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
202 goto done; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
203 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
204 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
205 if (size > pool->min_size) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
206 shift = 1; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
207 for (s = size - 1; s >>= 1; shift++) { /* void */ } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
208 slot = shift - pool->min_shift; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
209 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
210 } else { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
211 shift = pool->min_shift; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
212 slot = 0; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
213 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
214 |
6828 | 215 pool->stats[slot].reqs++; |
216 | |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
217 ngx_log_debug2(NGX_LOG_DEBUG_ALLOC, ngx_cycle->log, 0, |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
218 "slab alloc: %uz slot: %ui", size, slot); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
219 |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
220 slots = ngx_slab_slots(pool); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
221 page = slots[slot].next; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
222 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
223 if (page->next != page) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
224 |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
225 if (shift < ngx_slab_exact_shift) { |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
226 |
6826
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
227 bitmap = (uintptr_t *) ngx_slab_page_addr(pool, page); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
228 |
6827 | 229 map = (ngx_pagesize >> shift) / (sizeof(uintptr_t) * 8); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
230 |
6826
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
231 for (n = 0; n < map; n++) { |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
232 |
6826
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
233 if (bitmap[n] != NGX_SLAB_BUSY) { |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
234 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
235 for (m = 1, i = 0; m; m <<= 1, i++) { |
6826
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
236 if (bitmap[n] & m) { |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
237 continue; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
238 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
239 |
6826
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
240 bitmap[n] |= m; |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
241 |
6827 | 242 i = (n * sizeof(uintptr_t) * 8 + i) << shift; |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
243 |
6828 | 244 p = (uintptr_t) bitmap + i; |
245 | |
246 pool->stats[slot].used++; | |
247 | |
6826
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
248 if (bitmap[n] == NGX_SLAB_BUSY) { |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
249 for (n = n + 1; n < map; n++) { |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
250 if (bitmap[n] != NGX_SLAB_BUSY) { |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
251 goto done; |
d0404c9a7675
Slab: simplified allocation from slots.
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parents:
6825
diff
changeset
|
252 } |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
253 } |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
254 |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
255 prev = ngx_slab_page_prev(page); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
256 prev->next = page->next; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
257 page->next->prev = page->prev; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
258 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
259 page->next = NULL; |
6826
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
260 page->prev = NGX_SLAB_SMALL; |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
261 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
262 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
263 goto done; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
264 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
265 } |
6826
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
266 } |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
267 |
6826
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
268 } else if (shift == ngx_slab_exact_shift) { |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
269 |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
270 for (m = 1, i = 0; m; m <<= 1, i++) { |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
271 if (page->slab & m) { |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
272 continue; |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
273 } |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
274 |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
275 page->slab |= m; |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
276 |
6826
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
277 if (page->slab == NGX_SLAB_BUSY) { |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
278 prev = ngx_slab_page_prev(page); |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
279 prev->next = page->next; |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
280 page->next->prev = page->prev; |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
281 |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
282 page->next = NULL; |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
283 page->prev = NGX_SLAB_EXACT; |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
284 } |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
285 |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
286 p = ngx_slab_page_addr(pool, page) + (i << shift); |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
287 |
6828 | 288 pool->stats[slot].used++; |
289 | |
6826
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
290 goto done; |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
291 } |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
292 |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
293 } else { /* shift > ngx_slab_exact_shift */ |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
294 |
6827 | 295 mask = ((uintptr_t) 1 << (ngx_pagesize >> shift)) - 1; |
296 mask <<= NGX_SLAB_MAP_SHIFT; | |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
297 |
6826
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
298 for (m = (uintptr_t) 1 << NGX_SLAB_MAP_SHIFT, i = 0; |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
299 m & mask; |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
300 m <<= 1, i++) |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
301 { |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
302 if (page->slab & m) { |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
303 continue; |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
304 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
305 |
6826
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
306 page->slab |= m; |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
307 |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
308 if ((page->slab & NGX_SLAB_MAP_MASK) == mask) { |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
309 prev = ngx_slab_page_prev(page); |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
310 prev->next = page->next; |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
311 page->next->prev = page->prev; |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
312 |
6826
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
313 page->next = NULL; |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
314 page->prev = NGX_SLAB_BIG; |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
315 } |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
316 |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
317 p = ngx_slab_page_addr(pool, page) + (i << shift); |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
318 |
6828 | 319 pool->stats[slot].used++; |
320 | |
6826
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
321 goto done; |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
322 } |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
323 } |
6826
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
324 |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
325 ngx_slab_error(pool, NGX_LOG_ALERT, "ngx_slab_alloc(): page is busy"); |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
326 ngx_debug_point(); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
327 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
328 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
329 page = ngx_slab_alloc_pages(pool, 1); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
330 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
331 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
|
332 if (shift < ngx_slab_exact_shift) { |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
333 bitmap = (uintptr_t *) ngx_slab_page_addr(pool, page); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
334 |
6827 | 335 n = (ngx_pagesize >> shift) / ((1 << shift) * 8); |
860
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 if (n == 0) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
338 n = 1; |
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 |
6830
6eed5ed31e22
Slab: commented bitmap initialization for small allocations.
Ruslan Ermilov <ru@nginx.com>
parents:
6829
diff
changeset
|
341 /* "n" elements for bitmap, plus one requested */ |
6827 | 342 bitmap[0] = ((uintptr_t) 2 << n) - 1; |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
343 |
6827 | 344 map = (ngx_pagesize >> shift) / (sizeof(uintptr_t) * 8); |
860
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 for (i = 1; i < map; i++) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
347 bitmap[i] = 0; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
348 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
349 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
350 page->slab = shift; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
351 page->next = &slots[slot]; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
352 page->prev = (uintptr_t) &slots[slot] | NGX_SLAB_SMALL; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
353 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
354 slots[slot].next = page; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
355 |
6828 | 356 pool->stats[slot].total += (ngx_pagesize >> shift) - n; |
357 | |
6827 | 358 p = ngx_slab_page_addr(pool, page) + (n << shift); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
359 |
6828 | 360 pool->stats[slot].used++; |
361 | |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
362 goto done; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
363 |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
364 } else if (shift == ngx_slab_exact_shift) { |
860
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 page->slab = 1; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
367 page->next = &slots[slot]; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
368 page->prev = (uintptr_t) &slots[slot] | NGX_SLAB_EXACT; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
369 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
370 slots[slot].next = page; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
371 |
6828 | 372 pool->stats[slot].total += sizeof(uintptr_t) * 8; |
373 | |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
374 p = ngx_slab_page_addr(pool, page); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
375 |
6828 | 376 pool->stats[slot].used++; |
377 | |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
378 goto done; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
379 |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
380 } else { /* shift > ngx_slab_exact_shift */ |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
381 |
881
5ed08a4c3bd3
fix building on 64-bit platforms
Igor Sysoev <igor@sysoev.ru>
parents:
860
diff
changeset
|
382 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
|
383 page->next = &slots[slot]; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
384 page->prev = (uintptr_t) &slots[slot] | NGX_SLAB_BIG; |
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 slots[slot].next = page; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
387 |
6828 | 388 pool->stats[slot].total += ngx_pagesize >> shift; |
389 | |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
390 p = ngx_slab_page_addr(pool, page); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
391 |
6828 | 392 pool->stats[slot].used++; |
393 | |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
394 goto done; |
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 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
397 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
398 p = 0; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
399 |
6828 | 400 pool->stats[slot].fails++; |
401 | |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
402 done: |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
403 |
6480 | 404 ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, ngx_cycle->log, 0, |
405 "slab alloc: %p", (void *) p); | |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
406 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
407 return (void *) p; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
408 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
409 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
410 |
5726
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
411 void * |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
412 ngx_slab_calloc(ngx_slab_pool_t *pool, size_t size) |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
413 { |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
414 void *p; |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
415 |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
416 ngx_shmtx_lock(&pool->mutex); |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
417 |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
418 p = ngx_slab_calloc_locked(pool, size); |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
419 |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
420 ngx_shmtx_unlock(&pool->mutex); |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
421 |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
422 return p; |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
423 } |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
424 |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
425 |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
426 void * |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
427 ngx_slab_calloc_locked(ngx_slab_pool_t *pool, size_t size) |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
428 { |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
429 void *p; |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
430 |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
431 p = ngx_slab_alloc_locked(pool, size); |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
432 if (p) { |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
433 ngx_memzero(p, size); |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
434 } |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
435 |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
436 return p; |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
437 } |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
438 |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
439 |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
440 void |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
441 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
|
442 { |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
443 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
|
444 |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
445 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
|
446 |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
447 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
|
448 } |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
449 |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
450 |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
451 void |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
452 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
|
453 { |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
454 size_t size; |
1018
06306a20b8bb
fix slab allocator on 64-bit platfroms
Igor Sysoev <igor@sysoev.ru>
parents:
1016
diff
changeset
|
455 uintptr_t slab, m, *bitmap; |
6828 | 456 ngx_uint_t i, n, type, slot, shift, map; |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
457 ngx_slab_page_t *slots, *page; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
458 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
459 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
|
460 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
461 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
|
462 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
|
463 goto fail; |
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 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
466 n = ((u_char *) p - pool->start) >> ngx_pagesize_shift; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
467 page = &pool->pages[n]; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
468 slab = page->slab; |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
469 type = ngx_slab_page_type(page); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
470 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
471 switch (type) { |
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 case NGX_SLAB_SMALL: |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
474 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
475 shift = slab & NGX_SLAB_SHIFT_MASK; |
6861
e4590dfd97ff
Win32: support 64-bit compilation with MSVC.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6830
diff
changeset
|
476 size = (size_t) 1 << shift; |
860
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 if ((uintptr_t) p & (size - 1)) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
479 goto wrong_chunk; |
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 n = ((uintptr_t) p & (ngx_pagesize - 1)) >> shift; |
6827 | 483 m = (uintptr_t) 1 << (n % (sizeof(uintptr_t) * 8)); |
484 n /= sizeof(uintptr_t) * 8; | |
5362
79b9101cecf4
Handling of ngx_int_t != intptr_t case.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4829
diff
changeset
|
485 bitmap = (uintptr_t *) |
79b9101cecf4
Handling of ngx_int_t != intptr_t case.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4829
diff
changeset
|
486 ((uintptr_t) p & ~((uintptr_t) ngx_pagesize - 1)); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
487 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
488 if (bitmap[n] & m) { |
6828 | 489 slot = shift - pool->min_shift; |
860
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 (page->next == NULL) { |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
492 slots = ngx_slab_slots(pool); |
860
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 page->next = slots[slot].next; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
495 slots[slot].next = page; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
496 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
497 page->prev = (uintptr_t) &slots[slot] | NGX_SLAB_SMALL; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
498 page->next->prev = (uintptr_t) page | NGX_SLAB_SMALL; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
499 } |
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 bitmap[n] &= ~m; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
502 |
6827 | 503 n = (ngx_pagesize >> shift) / ((1 << shift) * 8); |
860
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 if (n == 0) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
506 n = 1; |
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 |
1016
d0e8c81d3bb7
fix slab allocator on 64-bit platfroms
Igor Sysoev <igor@sysoev.ru>
parents:
967
diff
changeset
|
509 if (bitmap[0] & ~(((uintptr_t) 1 << n) - 1)) { |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
510 goto done; |
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 |
6827 | 513 map = (ngx_pagesize >> shift) / (sizeof(uintptr_t) * 8); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
514 |
6828 | 515 for (i = 1; i < map; i++) { |
516 if (bitmap[i]) { | |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
517 goto done; |
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 } |
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 ngx_slab_free_pages(pool, page, 1); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
522 |
6828 | 523 pool->stats[slot].total -= (ngx_pagesize >> shift) - n; |
524 | |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
525 goto done; |
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 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
528 goto chunk_already_free; |
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 case NGX_SLAB_EXACT: |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
531 |
1016
d0e8c81d3bb7
fix slab allocator on 64-bit platfroms
Igor Sysoev <igor@sysoev.ru>
parents:
967
diff
changeset
|
532 m = (uintptr_t) 1 << |
d0e8c81d3bb7
fix slab allocator on 64-bit platfroms
Igor Sysoev <igor@sysoev.ru>
parents:
967
diff
changeset
|
533 (((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
|
534 size = ngx_slab_exact_size; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
535 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
536 if ((uintptr_t) p & (size - 1)) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
537 goto wrong_chunk; |
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 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
540 if (slab & m) { |
6828 | 541 slot = ngx_slab_exact_shift - pool->min_shift; |
542 | |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
543 if (slab == NGX_SLAB_BUSY) { |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
544 slots = ngx_slab_slots(pool); |
860
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 page->next = slots[slot].next; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
547 slots[slot].next = page; |
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 page->prev = (uintptr_t) &slots[slot] | NGX_SLAB_EXACT; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
550 page->next->prev = (uintptr_t) page | NGX_SLAB_EXACT; |
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 page->slab &= ~m; |
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 if (page->slab) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
556 goto done; |
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 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
559 ngx_slab_free_pages(pool, page, 1); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
560 |
6828 | 561 pool->stats[slot].total -= sizeof(uintptr_t) * 8; |
562 | |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
563 goto done; |
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 goto chunk_already_free; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
567 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
568 case NGX_SLAB_BIG: |
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 shift = slab & NGX_SLAB_SHIFT_MASK; |
6861
e4590dfd97ff
Win32: support 64-bit compilation with MSVC.
Maxim Dounin <mdounin@mdounin.ru>
parents:
6830
diff
changeset
|
571 size = (size_t) 1 << shift; |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
572 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
573 if ((uintptr_t) p & (size - 1)) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
574 goto wrong_chunk; |
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 |
1016
d0e8c81d3bb7
fix slab allocator on 64-bit platfroms
Igor Sysoev <igor@sysoev.ru>
parents:
967
diff
changeset
|
577 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
|
578 + NGX_SLAB_MAP_SHIFT); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
579 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
580 if (slab & m) { |
6828 | 581 slot = shift - pool->min_shift; |
860
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 if (page->next == NULL) { |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
584 slots = ngx_slab_slots(pool); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
585 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
586 page->next = slots[slot].next; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
587 slots[slot].next = page; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
588 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
589 page->prev = (uintptr_t) &slots[slot] | NGX_SLAB_BIG; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
590 page->next->prev = (uintptr_t) page | NGX_SLAB_BIG; |
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 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
593 page->slab &= ~m; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
594 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
595 if (page->slab & NGX_SLAB_MAP_MASK) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
596 goto 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 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
599 ngx_slab_free_pages(pool, page, 1); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
600 |
6828 | 601 pool->stats[slot].total -= ngx_pagesize >> shift; |
602 | |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
603 goto done; |
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 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
606 goto chunk_already_free; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
607 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
608 case NGX_SLAB_PAGE: |
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 if ((uintptr_t) p & (ngx_pagesize - 1)) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
611 goto wrong_chunk; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
612 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
613 |
6809
87d7e640b45d
Slab: improved double free detection.
Ruslan Ermilov <ru@nginx.com>
parents:
6808
diff
changeset
|
614 if (!(slab & NGX_SLAB_PAGE_START)) { |
2611
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
615 ngx_slab_error(pool, NGX_LOG_ALERT, |
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
616 "ngx_slab_free(): page is already free"); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
617 goto fail; |
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 if (slab == NGX_SLAB_PAGE_BUSY) { |
2611
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
621 ngx_slab_error(pool, NGX_LOG_ALERT, |
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
622 "ngx_slab_free(): pointer to wrong page"); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
623 goto fail; |
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 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
626 n = ((u_char *) p - pool->start) >> ngx_pagesize_shift; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
627 size = slab & ~NGX_SLAB_PAGE_START; |
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 ngx_slab_free_pages(pool, &pool->pages[n], size); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
630 |
2711
6b87e875e87a
fix building by BCC without NGX_DEBUG_MALLOC
Igor Sysoev <igor@sysoev.ru>
parents:
2611
diff
changeset
|
631 ngx_slab_junk(p, size << ngx_pagesize_shift); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
632 |
2711
6b87e875e87a
fix building by BCC without NGX_DEBUG_MALLOC
Igor Sysoev <igor@sysoev.ru>
parents:
2611
diff
changeset
|
633 return; |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
634 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
635 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
636 /* not reached */ |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
637 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
638 return; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
639 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
640 done: |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
641 |
6828 | 642 pool->stats[slot].used--; |
643 | |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
644 ngx_slab_junk(p, size); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
645 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
646 return; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
647 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
648 wrong_chunk: |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
649 |
2611
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
650 ngx_slab_error(pool, NGX_LOG_ALERT, |
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
651 "ngx_slab_free(): pointer to wrong chunk"); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
652 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
653 goto fail; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
654 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
655 chunk_already_free: |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
656 |
2611
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
657 ngx_slab_error(pool, NGX_LOG_ALERT, |
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
658 "ngx_slab_free(): chunk is already free"); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
659 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
660 fail: |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
661 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
662 return; |
357
e260514b9ad4
nginx-0.0.7-2004-06-16-23:36:07 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
663 } |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
664 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
665 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
666 static ngx_slab_page_t * |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
667 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
|
668 { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
669 ngx_slab_page_t *page, *p; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
670 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
671 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
|
672 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
673 if (page->slab >= pages) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
674 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
675 if (page->slab > pages) { |
5718
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
676 page[page->slab - 1].prev = (uintptr_t) &page[pages]; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
677 |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
678 page[pages].slab = page->slab - pages; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
679 page[pages].next = page->next; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
680 page[pages].prev = page->prev; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
681 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
682 p = (ngx_slab_page_t *) page->prev; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
683 p->next = &page[pages]; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
684 page->next->prev = (uintptr_t) &page[pages]; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
685 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
686 } else { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
687 p = (ngx_slab_page_t *) page->prev; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
688 p->next = page->next; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
689 page->next->prev = page->prev; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
690 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
691 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
692 page->slab = pages | NGX_SLAB_PAGE_START; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
693 page->next = NULL; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
694 page->prev = NGX_SLAB_PAGE; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
695 |
6829
6e757036e588
Slab: free pages statistics.
Ruslan Ermilov <ru@nginx.com>
parents:
6828
diff
changeset
|
696 pool->pfree -= pages; |
6e757036e588
Slab: free pages statistics.
Ruslan Ermilov <ru@nginx.com>
parents:
6828
diff
changeset
|
697 |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
698 if (--pages == 0) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
699 return page; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
700 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
701 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
702 for (p = page + 1; pages; pages--) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
703 p->slab = NGX_SLAB_PAGE_BUSY; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
704 p->next = NULL; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
705 p->prev = NGX_SLAB_PAGE; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
706 p++; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
707 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
708 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
709 return page; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
710 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
711 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
712 |
5634
5024d29354f1
Core: slab log_nomem flag.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5362
diff
changeset
|
713 if (pool->log_nomem) { |
5024d29354f1
Core: slab log_nomem flag.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5362
diff
changeset
|
714 ngx_slab_error(pool, NGX_LOG_CRIT, |
5024d29354f1
Core: slab log_nomem flag.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5362
diff
changeset
|
715 "ngx_slab_alloc() failed: no memory"); |
5024d29354f1
Core: slab log_nomem flag.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5362
diff
changeset
|
716 } |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
717 |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
718 return NULL; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
719 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
720 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
721 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
722 static void |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
723 ngx_slab_free_pages(ngx_slab_pool_t *pool, ngx_slab_page_t *page, |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
724 ngx_uint_t pages) |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
725 { |
5718
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
726 ngx_slab_page_t *prev, *join; |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
727 |
6829
6e757036e588
Slab: free pages statistics.
Ruslan Ermilov <ru@nginx.com>
parents:
6828
diff
changeset
|
728 pool->pfree += pages; |
6e757036e588
Slab: free pages statistics.
Ruslan Ermilov <ru@nginx.com>
parents:
6828
diff
changeset
|
729 |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
730 page->slab = pages--; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
731 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
732 if (pages) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
733 ngx_memzero(&page[1], pages * sizeof(ngx_slab_page_t)); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
734 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
735 |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
736 if (page->next) { |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
737 prev = ngx_slab_page_prev(page); |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
738 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
|
739 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
changeset
|
740 } |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
741 |
5718
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
742 join = page + page->slab; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
743 |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
744 if (join < pool->last) { |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
745 |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
746 if (ngx_slab_page_type(join) == NGX_SLAB_PAGE) { |
5718
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
747 |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
748 if (join->next != NULL) { |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
749 pages += join->slab; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
750 page->slab += join->slab; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
751 |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
752 prev = ngx_slab_page_prev(join); |
5718
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
753 prev->next = join->next; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
754 join->next->prev = join->prev; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
755 |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
756 join->slab = NGX_SLAB_PAGE_FREE; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
757 join->next = NULL; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
758 join->prev = NGX_SLAB_PAGE; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
759 } |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
760 } |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
761 } |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
762 |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
763 if (page > pool->pages) { |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
764 join = page - 1; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
765 |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
766 if (ngx_slab_page_type(join) == NGX_SLAB_PAGE) { |
5718
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
767 |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
768 if (join->slab == NGX_SLAB_PAGE_FREE) { |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
769 join = ngx_slab_page_prev(join); |
5718
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
770 } |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
771 |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
772 if (join->next != NULL) { |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
773 pages += join->slab; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
774 join->slab += page->slab; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
775 |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
776 prev = ngx_slab_page_prev(join); |
5718
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
777 prev->next = join->next; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
778 join->next->prev = join->prev; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
779 |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
780 page->slab = NGX_SLAB_PAGE_FREE; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
781 page->next = NULL; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
782 page->prev = NGX_SLAB_PAGE; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
783 |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
784 page = join; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
785 } |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
786 } |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
787 } |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
788 |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
789 if (pages) { |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
790 page[pages].prev = (uintptr_t) page; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
791 } |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
792 |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
793 page->prev = (uintptr_t) &pool->free; |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
794 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
|
795 |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
796 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
|
797 |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
798 pool->free.next = page; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
799 } |
2611
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
800 |
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
801 |
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
802 static void |
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
803 ngx_slab_error(ngx_slab_pool_t *pool, ngx_uint_t level, char *text) |
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
804 { |
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
805 ngx_log_error(level, ngx_cycle->log, 0, "%s%s", text, pool->log_ctx); |
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
806 } |