Mercurial > hg > nginx
annotate src/core/ngx_slab.c @ 6827:0e61510c56c4
Slab: simplified some math.
No functional changes.
author | Ruslan Ermilov <ru@nginx.com> |
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date | Wed, 07 Dec 2016 22:25:37 +0300 |
parents | d0404c9a7675 |
children | 99770a5ea14f |
rev | line source |
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441
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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. |
441
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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 = 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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826
diff
changeset
|
121 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
122 p += n * sizeof(ngx_slab_page_t); |
6825
f6beb55792de
Slab: fixed the number of pages calculation.
Ruslan Ermilov <ru@nginx.com>
parents:
6824
diff
changeset
|
123 size -= n * sizeof(ngx_slab_page_t); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
124 |
1645
31622d9f2c0d
the simple expression has the same precision without overflow
Igor Sysoev <igor@sysoev.ru>
parents:
1018
diff
changeset
|
125 pages = (ngx_uint_t) (size / (ngx_pagesize + sizeof(ngx_slab_page_t))); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
126 |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
127 pool->pages = (ngx_slab_page_t *) p; |
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
128 ngx_memzero(pool->pages, pages * sizeof(ngx_slab_page_t)); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
129 |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
130 page = pool->pages; |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
131 |
6824
ea12328518dc
Slab: added comment about list heads.
Ruslan Ermilov <ru@nginx.com>
parents:
6823
diff
changeset
|
132 /* only "next" is used in list head */ |
ea12328518dc
Slab: added comment about list heads.
Ruslan Ermilov <ru@nginx.com>
parents:
6823
diff
changeset
|
133 pool->free.slab = 0; |
ea12328518dc
Slab: added comment about list heads.
Ruslan Ermilov <ru@nginx.com>
parents:
6823
diff
changeset
|
134 pool->free.next = page; |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
135 pool->free.prev = 0; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
136 |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
137 page->slab = pages; |
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
138 page->next = &pool->free; |
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
139 page->prev = (uintptr_t) &pool->free; |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
140 |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
141 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
|
142 ngx_pagesize); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
143 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
144 m = pages - (pool->end - pool->start) / ngx_pagesize; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
145 if (m > 0) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
146 pages -= m; |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
147 page->slab = pages; |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
148 } |
2611
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
149 |
5718
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
150 pool->last = pool->pages + pages; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
151 |
5634
5024d29354f1
Core: slab log_nomem flag.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5362
diff
changeset
|
152 pool->log_nomem = 1; |
2611
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
153 pool->log_ctx = &pool->zero; |
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
154 pool->zero = '\0'; |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
155 } |
357
e260514b9ad4
nginx-0.0.7-2004-06-16-23:36:07 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
156 |
e260514b9ad4
nginx-0.0.7-2004-06-16-23:36:07 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
157 |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
158 void * |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
159 ngx_slab_alloc(ngx_slab_pool_t *pool, size_t size) |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
160 { |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
161 void *p; |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
162 |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
163 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
|
164 |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
165 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
|
166 |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
167 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
|
168 |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
169 return p; |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
170 } |
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 |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
173 void * |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
174 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
|
175 { |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
176 size_t s; |
881
5ed08a4c3bd3
fix building on 64-bit platforms
Igor Sysoev <igor@sysoev.ru>
parents:
860
diff
changeset
|
177 uintptr_t p, n, m, mask, *bitmap; |
5ed08a4c3bd3
fix building on 64-bit platforms
Igor Sysoev <igor@sysoev.ru>
parents:
860
diff
changeset
|
178 ngx_uint_t i, slot, shift, map; |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
179 ngx_slab_page_t *page, *prev, *slots; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
180 |
5766
abdb027be9d5
Core: bugfix for the ngx_slab_max_size case.
Jianjun Zheng <codeeply@gmail.com>
parents:
5726
diff
changeset
|
181 if (size > ngx_slab_max_size) { |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
182 |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
183 ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, ngx_cycle->log, 0, |
967 | 184 "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
|
185 |
4829
40de49cf6b37
Fixed overflow if ngx_slab_alloc() is called with very big "size" argument.
Ruslan Ermilov <ru@nginx.com>
parents:
4764
diff
changeset
|
186 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
|
187 + ((size % ngx_pagesize) ? 1 : 0)); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
188 if (page) { |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
189 p = ngx_slab_page_addr(pool, page); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
190 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
191 } else { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
192 p = 0; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
193 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
194 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
195 goto done; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
196 } |
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 if (size > pool->min_size) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
199 shift = 1; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
200 for (s = size - 1; s >>= 1; shift++) { /* void */ } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
201 slot = shift - pool->min_shift; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
202 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
203 } else { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
204 shift = pool->min_shift; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
205 slot = 0; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
206 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
207 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
208 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
|
209 "slab alloc: %uz slot: %ui", size, slot); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
210 |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
211 slots = ngx_slab_slots(pool); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
212 page = slots[slot].next; |
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 if (page->next != page) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
215 |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
216 if (shift < ngx_slab_exact_shift) { |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
217 |
6826
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
218 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
|
219 |
6827 | 220 map = (ngx_pagesize >> shift) / (sizeof(uintptr_t) * 8); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
221 |
6826
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
222 for (n = 0; n < map; n++) { |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
223 |
6826
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
224 if (bitmap[n] != NGX_SLAB_BUSY) { |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
225 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
226 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
|
227 if (bitmap[n] & m) { |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
228 continue; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
229 } |
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 bitmap[n] |= m; |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
232 |
6827 | 233 i = (n * sizeof(uintptr_t) * 8 + i) << shift; |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
234 |
6826
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
235 if (bitmap[n] == NGX_SLAB_BUSY) { |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
236 for (n = n + 1; n < map; n++) { |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
237 if (bitmap[n] != NGX_SLAB_BUSY) { |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
238 p = (uintptr_t) bitmap + i; |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
239 |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
240 goto done; |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
241 } |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
242 } |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
243 |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
244 prev = ngx_slab_page_prev(page); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
245 prev->next = page->next; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
246 page->next->prev = page->prev; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
247 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
248 page->next = NULL; |
6826
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
249 page->prev = NGX_SLAB_SMALL; |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
250 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
251 |
6826
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
252 p = (uintptr_t) bitmap + i; |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
253 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
254 goto done; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
255 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
256 } |
6826
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
257 } |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
258 |
6826
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
259 } else if (shift == ngx_slab_exact_shift) { |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
260 |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
261 for (m = 1, i = 0; m; m <<= 1, i++) { |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
262 if (page->slab & m) { |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
263 continue; |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
264 } |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
265 |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
266 page->slab |= m; |
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 if (page->slab == NGX_SLAB_BUSY) { |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
269 prev = ngx_slab_page_prev(page); |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
270 prev->next = page->next; |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
changeset
|
271 page->next->prev = page->prev; |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
272 |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
273 page->next = NULL; |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
274 page->prev = NGX_SLAB_EXACT; |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
275 } |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
276 |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
277 p = ngx_slab_page_addr(pool, page) + (i << shift); |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
278 |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
279 goto done; |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
280 } |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
281 |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
282 } else { /* shift > ngx_slab_exact_shift */ |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
283 |
6827 | 284 mask = ((uintptr_t) 1 << (ngx_pagesize >> shift)) - 1; |
285 mask <<= NGX_SLAB_MAP_SHIFT; | |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
286 |
6826
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
287 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
|
288 m & mask; |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
289 m <<= 1, i++) |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
290 { |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
291 if (page->slab & m) { |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
292 continue; |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
293 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
294 |
6826
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
295 page->slab |= m; |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
296 |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
297 if ((page->slab & NGX_SLAB_MAP_MASK) == mask) { |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
298 prev = ngx_slab_page_prev(page); |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
299 prev->next = page->next; |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
300 page->next->prev = page->prev; |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
301 |
6826
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
302 page->next = NULL; |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
303 page->prev = NGX_SLAB_BIG; |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
304 } |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
305 |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
306 p = ngx_slab_page_addr(pool, page) + (i << shift); |
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 goto done; |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
309 } |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
310 } |
6826
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
311 |
d0404c9a7675
Slab: simplified allocation from slots.
Ruslan Ermilov <ru@nginx.com>
parents:
6825
diff
changeset
|
312 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
|
313 ngx_debug_point(); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
314 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
315 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
316 page = ngx_slab_alloc_pages(pool, 1); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
317 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
318 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
|
319 if (shift < ngx_slab_exact_shift) { |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
320 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
|
321 |
6827 | 322 n = (ngx_pagesize >> shift) / ((1 << shift) * 8); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
323 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
324 if (n == 0) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
325 n = 1; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
326 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
327 |
6827 | 328 bitmap[0] = ((uintptr_t) 2 << n) - 1; |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
329 |
6827 | 330 map = (ngx_pagesize >> shift) / (sizeof(uintptr_t) * 8); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
331 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
332 for (i = 1; i < map; i++) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
333 bitmap[i] = 0; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
334 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
335 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
336 page->slab = shift; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
337 page->next = &slots[slot]; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
338 page->prev = (uintptr_t) &slots[slot] | NGX_SLAB_SMALL; |
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 slots[slot].next = page; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
341 |
6827 | 342 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
|
343 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
344 goto done; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
345 |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
346 } else if (shift == ngx_slab_exact_shift) { |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
347 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
348 page->slab = 1; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
349 page->next = &slots[slot]; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
350 page->prev = (uintptr_t) &slots[slot] | NGX_SLAB_EXACT; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
351 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
352 slots[slot].next = page; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
353 |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
354 p = ngx_slab_page_addr(pool, page); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
355 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
356 goto done; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
357 |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
358 } else { /* shift > ngx_slab_exact_shift */ |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
359 |
881
5ed08a4c3bd3
fix building on 64-bit platforms
Igor Sysoev <igor@sysoev.ru>
parents:
860
diff
changeset
|
360 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
|
361 page->next = &slots[slot]; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
362 page->prev = (uintptr_t) &slots[slot] | NGX_SLAB_BIG; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
363 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
364 slots[slot].next = page; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
365 |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
366 p = ngx_slab_page_addr(pool, page); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
367 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
368 goto done; |
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 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
371 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
372 p = 0; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
373 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
374 done: |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
375 |
6480 | 376 ngx_log_debug1(NGX_LOG_DEBUG_ALLOC, ngx_cycle->log, 0, |
377 "slab alloc: %p", (void *) p); | |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
378 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
379 return (void *) p; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
380 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
381 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
382 |
5726
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
383 void * |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
384 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
|
385 { |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
386 void *p; |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
387 |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
388 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
|
389 |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
390 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
|
391 |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
392 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
|
393 |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
394 return p; |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
395 } |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
396 |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
397 |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
398 void * |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
399 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
|
400 { |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
401 void *p; |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
402 |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
403 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
|
404 if (p) { |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
405 ngx_memzero(p, size); |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
406 } |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
407 |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
408 return p; |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
409 } |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
410 |
25ade23cf281
Core: added ngx_slab_calloc() and ngx_slab_calloc_locked().
Ruslan Ermilov <ru@nginx.com>
parents:
5718
diff
changeset
|
411 |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
412 void |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
413 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
|
414 { |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
415 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
|
416 |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
417 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
|
418 |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
419 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
|
420 } |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
421 |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
422 |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
423 void |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
424 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
|
425 { |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
426 size_t size; |
1018
06306a20b8bb
fix slab allocator on 64-bit platfroms
Igor Sysoev <igor@sysoev.ru>
parents:
1016
diff
changeset
|
427 uintptr_t slab, m, *bitmap; |
06306a20b8bb
fix slab allocator on 64-bit platfroms
Igor Sysoev <igor@sysoev.ru>
parents:
1016
diff
changeset
|
428 ngx_uint_t n, type, slot, shift, map; |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
429 ngx_slab_page_t *slots, *page; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
430 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
431 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
|
432 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
433 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
|
434 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
|
435 goto fail; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
436 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
437 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
438 n = ((u_char *) p - pool->start) >> ngx_pagesize_shift; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
439 page = &pool->pages[n]; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
440 slab = page->slab; |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
441 type = ngx_slab_page_type(page); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
442 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
443 switch (type) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
444 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
445 case NGX_SLAB_SMALL: |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
446 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
447 shift = slab & NGX_SLAB_SHIFT_MASK; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
448 size = 1 << shift; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
449 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
450 if ((uintptr_t) p & (size - 1)) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
451 goto wrong_chunk; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
452 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
453 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
454 n = ((uintptr_t) p & (ngx_pagesize - 1)) >> shift; |
6827 | 455 m = (uintptr_t) 1 << (n % (sizeof(uintptr_t) * 8)); |
456 n /= sizeof(uintptr_t) * 8; | |
5362
79b9101cecf4
Handling of ngx_int_t != intptr_t case.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4829
diff
changeset
|
457 bitmap = (uintptr_t *) |
79b9101cecf4
Handling of ngx_int_t != intptr_t case.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4829
diff
changeset
|
458 ((uintptr_t) p & ~((uintptr_t) ngx_pagesize - 1)); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
459 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
460 if (bitmap[n] & m) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
461 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
462 if (page->next == NULL) { |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
463 slots = ngx_slab_slots(pool); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
464 slot = shift - pool->min_shift; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
465 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
466 page->next = slots[slot].next; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
467 slots[slot].next = page; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
468 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
469 page->prev = (uintptr_t) &slots[slot] | NGX_SLAB_SMALL; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
470 page->next->prev = (uintptr_t) page | NGX_SLAB_SMALL; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
471 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
472 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
473 bitmap[n] &= ~m; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
474 |
6827 | 475 n = (ngx_pagesize >> shift) / ((1 << shift) * 8); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
476 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
477 if (n == 0) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
478 n = 1; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
479 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
480 |
1016
d0e8c81d3bb7
fix slab allocator on 64-bit platfroms
Igor Sysoev <igor@sysoev.ru>
parents:
967
diff
changeset
|
481 if (bitmap[0] & ~(((uintptr_t) 1 << n) - 1)) { |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
482 goto done; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
483 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
484 |
6827 | 485 map = (ngx_pagesize >> shift) / (sizeof(uintptr_t) * 8); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
486 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
487 for (n = 1; n < map; n++) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
488 if (bitmap[n]) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
489 goto done; |
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 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
492 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
493 ngx_slab_free_pages(pool, page, 1); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
494 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
495 goto done; |
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 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
498 goto chunk_already_free; |
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 case NGX_SLAB_EXACT: |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
501 |
1016
d0e8c81d3bb7
fix slab allocator on 64-bit platfroms
Igor Sysoev <igor@sysoev.ru>
parents:
967
diff
changeset
|
502 m = (uintptr_t) 1 << |
d0e8c81d3bb7
fix slab allocator on 64-bit platfroms
Igor Sysoev <igor@sysoev.ru>
parents:
967
diff
changeset
|
503 (((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
|
504 size = ngx_slab_exact_size; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
505 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
506 if ((uintptr_t) p & (size - 1)) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
507 goto wrong_chunk; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
508 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
509 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
510 if (slab & m) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
511 if (slab == NGX_SLAB_BUSY) { |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
512 slots = ngx_slab_slots(pool); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
513 slot = ngx_slab_exact_shift - pool->min_shift; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
514 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
515 page->next = slots[slot].next; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
516 slots[slot].next = page; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
517 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
518 page->prev = (uintptr_t) &slots[slot] | NGX_SLAB_EXACT; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
519 page->next->prev = (uintptr_t) page | NGX_SLAB_EXACT; |
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 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
522 page->slab &= ~m; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
523 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
524 if (page->slab) { |
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 ngx_slab_free_pages(pool, page, 1); |
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 goto done; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
531 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
532 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
533 goto chunk_already_free; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
534 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
535 case NGX_SLAB_BIG: |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
536 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
537 shift = slab & NGX_SLAB_SHIFT_MASK; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
538 size = 1 << shift; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
539 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
540 if ((uintptr_t) p & (size - 1)) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
541 goto wrong_chunk; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
542 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
543 |
1016
d0e8c81d3bb7
fix slab allocator on 64-bit platfroms
Igor Sysoev <igor@sysoev.ru>
parents:
967
diff
changeset
|
544 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
|
545 + NGX_SLAB_MAP_SHIFT); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
546 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
547 if (slab & m) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
548 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
549 if (page->next == NULL) { |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
550 slots = ngx_slab_slots(pool); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
551 slot = shift - pool->min_shift; |
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->next = slots[slot].next; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
554 slots[slot].next = page; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
555 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
556 page->prev = (uintptr_t) &slots[slot] | NGX_SLAB_BIG; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
557 page->next->prev = (uintptr_t) page | NGX_SLAB_BIG; |
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 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
560 page->slab &= ~m; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
561 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
562 if (page->slab & NGX_SLAB_MAP_MASK) { |
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 ngx_slab_free_pages(pool, page, 1); |
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 goto done; |
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 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
571 goto chunk_already_free; |
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 case NGX_SLAB_PAGE: |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
574 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
575 if ((uintptr_t) p & (ngx_pagesize - 1)) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
576 goto wrong_chunk; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
577 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
578 |
6809
87d7e640b45d
Slab: improved double free detection.
Ruslan Ermilov <ru@nginx.com>
parents:
6808
diff
changeset
|
579 if (!(slab & NGX_SLAB_PAGE_START)) { |
2611
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
580 ngx_slab_error(pool, NGX_LOG_ALERT, |
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
581 "ngx_slab_free(): page is already free"); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
582 goto fail; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
583 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
584 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
585 if (slab == NGX_SLAB_PAGE_BUSY) { |
2611
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
586 ngx_slab_error(pool, NGX_LOG_ALERT, |
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
587 "ngx_slab_free(): pointer to wrong page"); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
588 goto fail; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
589 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
590 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
591 n = ((u_char *) p - pool->start) >> ngx_pagesize_shift; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
592 size = slab & ~NGX_SLAB_PAGE_START; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
593 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
594 ngx_slab_free_pages(pool, &pool->pages[n], size); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
595 |
2711
6b87e875e87a
fix building by BCC without NGX_DEBUG_MALLOC
Igor Sysoev <igor@sysoev.ru>
parents:
2611
diff
changeset
|
596 ngx_slab_junk(p, size << ngx_pagesize_shift); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
597 |
2711
6b87e875e87a
fix building by BCC without NGX_DEBUG_MALLOC
Igor Sysoev <igor@sysoev.ru>
parents:
2611
diff
changeset
|
598 return; |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
599 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
600 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
601 /* not reached */ |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
602 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
603 return; |
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 done: |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
606 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
607 ngx_slab_junk(p, size); |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
608 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
609 return; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
610 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
611 wrong_chunk: |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
612 |
2611
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
613 ngx_slab_error(pool, NGX_LOG_ALERT, |
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
614 "ngx_slab_free(): pointer to wrong chunk"); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
615 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
616 goto fail; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
617 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
618 chunk_already_free: |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
619 |
2611
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
620 ngx_slab_error(pool, NGX_LOG_ALERT, |
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
621 "ngx_slab_free(): chunk is already free"); |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
622 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
623 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 return; |
357
e260514b9ad4
nginx-0.0.7-2004-06-16-23:36:07 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
626 } |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
627 |
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 static ngx_slab_page_t * |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
630 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
|
631 { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
632 ngx_slab_page_t *page, *p; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
633 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
634 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
|
635 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
636 if (page->slab >= pages) { |
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 if (page->slab > pages) { |
5718
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
639 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
|
640 |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
641 page[pages].slab = page->slab - pages; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
642 page[pages].next = page->next; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
643 page[pages].prev = page->prev; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
644 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
645 p = (ngx_slab_page_t *) page->prev; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
646 p->next = &page[pages]; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
647 page->next->prev = (uintptr_t) &page[pages]; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
648 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
649 } else { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
650 p = (ngx_slab_page_t *) page->prev; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
651 p->next = page->next; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
652 page->next->prev = page->prev; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
653 } |
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 page->slab = pages | NGX_SLAB_PAGE_START; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
656 page->next = NULL; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
657 page->prev = NGX_SLAB_PAGE; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
658 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
659 if (--pages == 0) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
660 return page; |
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 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
663 for (p = page + 1; pages; pages--) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
664 p->slab = NGX_SLAB_PAGE_BUSY; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
665 p->next = NULL; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
666 p->prev = NGX_SLAB_PAGE; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
667 p++; |
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 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
670 return page; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
671 } |
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 |
5634
5024d29354f1
Core: slab log_nomem flag.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5362
diff
changeset
|
674 if (pool->log_nomem) { |
5024d29354f1
Core: slab log_nomem flag.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5362
diff
changeset
|
675 ngx_slab_error(pool, NGX_LOG_CRIT, |
5024d29354f1
Core: slab log_nomem flag.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5362
diff
changeset
|
676 "ngx_slab_alloc() failed: no memory"); |
5024d29354f1
Core: slab log_nomem flag.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5362
diff
changeset
|
677 } |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
678 |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
679 return NULL; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
680 } |
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 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
683 static void |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
684 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
|
685 ngx_uint_t pages) |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
686 { |
5718
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
687 ngx_slab_page_t *prev, *join; |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
688 |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
689 page->slab = pages--; |
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 if (pages) { |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
692 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
|
693 } |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
694 |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
695 if (page->next) { |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
696 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
|
697 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
|
698 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
|
699 } |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
700 |
5718
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
701 join = page + page->slab; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
702 |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
703 if (join < pool->last) { |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
704 |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
705 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
|
706 |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
707 if (join->next != NULL) { |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
708 pages += join->slab; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
709 page->slab += join->slab; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
710 |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
711 prev = ngx_slab_page_prev(join); |
5718
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
712 prev->next = join->next; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
713 join->next->prev = join->prev; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
714 |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
715 join->slab = NGX_SLAB_PAGE_FREE; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
716 join->next = NULL; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
717 join->prev = NGX_SLAB_PAGE; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
718 } |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
719 } |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
720 } |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
721 |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
722 if (page > pool->pages) { |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
723 join = page - 1; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
724 |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
725 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
|
726 |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
727 if (join->slab == NGX_SLAB_PAGE_FREE) { |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
728 join = ngx_slab_page_prev(join); |
5718
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
729 } |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
730 |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
731 if (join->next != NULL) { |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
732 pages += join->slab; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
733 join->slab += page->slab; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
734 |
6823
88c8c3d65184
Slab: improved code readability.
Ruslan Ermilov <ru@nginx.com>
parents:
6809
diff
changeset
|
735 prev = ngx_slab_page_prev(join); |
5718
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
736 prev->next = join->next; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
737 join->next->prev = join->prev; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
738 |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
739 page->slab = NGX_SLAB_PAGE_FREE; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
740 page->next = NULL; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
741 page->prev = NGX_SLAB_PAGE; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
742 |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
743 page = join; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
744 } |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
745 } |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
746 } |
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 (pages) { |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
749 page[pages].prev = (uintptr_t) page; |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
750 } |
c46657e391a3
Core: slab allocator free pages defragmentation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5634
diff
changeset
|
751 |
966
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
752 page->prev = (uintptr_t) &pool->free; |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
753 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
|
754 |
715336c243e1
many bug fixes and ngx_slab_alloc_locked()/ngx_slab_free_locked()
Igor Sysoev <igor@sysoev.ru>
parents:
881
diff
changeset
|
755 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
|
756 |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
757 pool->free.next = page; |
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
826
diff
changeset
|
758 } |
2611
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
759 |
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
760 |
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
761 static void |
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
762 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
|
763 { |
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2610
diff
changeset
|
764 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
|
765 } |