Mercurial > hg > nginx
annotate src/core/ngx_hash.h @ 4436:311b358658c8 stable-1.0
Merge of r4339, r4340, r4341:
Cache fixes:
*) Obsolete code removed.
The ngx_http_cache() and ngx_http_no_cache_set_slot() functions
were replaced in 0.8.46 and no longer used since then.
*) Handling of cache files with long headers.
There are two possible situations which can lead to this: response
was cached with bigger proxy_buffer_size value (and nginx was
restared since then, i.e. shared memory zone content was lost), or
due to the race in the cache update code (see [1]) we've end up
with fcn->body_start from a different response stored in shared
memory zone.
*) Only complain on long locked entries.
There have been multiple reports of cases where a real locked entry
was removed, resulting in a segmentation fault later in a worker
which locked the entry. It looks like default inactive timeout isn't
enough in real life.
For now just ignore such locked entries, and move them to the top of
the inactive queue to allow processing of other entries.
[1] http://mailman.nginx.org/pipermail/nginx-devel/2011-September/001287.html
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Sun, 05 Feb 2012 13:34:08 +0000 |
parents | 4c70bbdfd076 |
children | d620f497c50f |
rev | line source |
---|---|
507 | 1 |
2 /* | |
3 * Copyright (C) Igor Sysoev | |
4 */ | |
5 | |
6 | |
7 #ifndef _NGX_HASH_H_INCLUDED_ | |
8 #define _NGX_HASH_H_INCLUDED_ | |
9 | |
10 | |
11 #include <ngx_config.h> | |
12 #include <ngx_core.h> | |
13 | |
14 | |
15 typedef struct { | |
589 | 16 void *value; |
3510
4c70bbdfd076
allow hash key values more than 255 bytes, it does not actually increase mean
Igor Sysoev <igor@sysoev.ru>
parents:
2136
diff
changeset
|
17 u_short len; |
589 | 18 u_char name[1]; |
19 } ngx_hash_elt_t; | |
507 | 20 |
589 | 21 |
22 typedef struct { | |
23 ngx_hash_elt_t **buckets; | |
24 ngx_uint_t size; | |
507 | 25 } ngx_hash_t; |
26 | |
27 | |
28 typedef struct { | |
589 | 29 ngx_hash_t hash; |
30 void *value; | |
31 } ngx_hash_wildcard_t; | |
32 | |
33 | |
34 typedef struct { | |
35 ngx_str_t key; | |
36 ngx_uint_t key_hash; | |
37 void *value; | |
38 } ngx_hash_key_t; | |
39 | |
40 | |
41 typedef ngx_uint_t (*ngx_hash_key_pt) (u_char *data, size_t len); | |
42 | |
43 | |
44 typedef struct { | |
1253
8ef04207c84f
the "www.example.*" wildcard hash support
Igor Sysoev <igor@sysoev.ru>
parents:
1241
diff
changeset
|
45 ngx_hash_t hash; |
8ef04207c84f
the "www.example.*" wildcard hash support
Igor Sysoev <igor@sysoev.ru>
parents:
1241
diff
changeset
|
46 ngx_hash_wildcard_t *wc_head; |
8ef04207c84f
the "www.example.*" wildcard hash support
Igor Sysoev <igor@sysoev.ru>
parents:
1241
diff
changeset
|
47 ngx_hash_wildcard_t *wc_tail; |
8ef04207c84f
the "www.example.*" wildcard hash support
Igor Sysoev <igor@sysoev.ru>
parents:
1241
diff
changeset
|
48 } ngx_hash_combined_t; |
8ef04207c84f
the "www.example.*" wildcard hash support
Igor Sysoev <igor@sysoev.ru>
parents:
1241
diff
changeset
|
49 |
8ef04207c84f
the "www.example.*" wildcard hash support
Igor Sysoev <igor@sysoev.ru>
parents:
1241
diff
changeset
|
50 |
8ef04207c84f
the "www.example.*" wildcard hash support
Igor Sysoev <igor@sysoev.ru>
parents:
1241
diff
changeset
|
51 typedef struct { |
589 | 52 ngx_hash_t *hash; |
53 ngx_hash_key_pt key; | |
54 | |
55 ngx_uint_t max_size; | |
56 ngx_uint_t bucket_size; | |
57 | |
58 char *name; | |
59 ngx_pool_t *pool; | |
60 ngx_pool_t *temp_pool; | |
61 } ngx_hash_init_t; | |
62 | |
63 | |
593 | 64 #define NGX_HASH_SMALL 1 |
65 #define NGX_HASH_LARGE 2 | |
66 | |
67 #define NGX_HASH_LARGE_ASIZE 16384 | |
68 #define NGX_HASH_LARGE_HSIZE 10007 | |
69 | |
70 #define NGX_HASH_WILDCARD_KEY 1 | |
597 | 71 #define NGX_HASH_READONLY_KEY 2 |
593 | 72 |
73 | |
74 typedef struct { | |
75 ngx_uint_t hsize; | |
76 | |
77 ngx_pool_t *pool; | |
78 ngx_pool_t *temp_pool; | |
79 | |
80 ngx_array_t keys; | |
81 ngx_array_t *keys_hash; | |
82 | |
1253
8ef04207c84f
the "www.example.*" wildcard hash support
Igor Sysoev <igor@sysoev.ru>
parents:
1241
diff
changeset
|
83 ngx_array_t dns_wc_head; |
8ef04207c84f
the "www.example.*" wildcard hash support
Igor Sysoev <igor@sysoev.ru>
parents:
1241
diff
changeset
|
84 ngx_array_t *dns_wc_head_hash; |
8ef04207c84f
the "www.example.*" wildcard hash support
Igor Sysoev <igor@sysoev.ru>
parents:
1241
diff
changeset
|
85 |
8ef04207c84f
the "www.example.*" wildcard hash support
Igor Sysoev <igor@sysoev.ru>
parents:
1241
diff
changeset
|
86 ngx_array_t dns_wc_tail; |
8ef04207c84f
the "www.example.*" wildcard hash support
Igor Sysoev <igor@sysoev.ru>
parents:
1241
diff
changeset
|
87 ngx_array_t *dns_wc_tail_hash; |
593 | 88 } ngx_hash_keys_arrays_t; |
89 | |
90 | |
589 | 91 typedef struct { |
92 ngx_uint_t hash; | |
93 ngx_str_t key; | |
94 ngx_str_t value; | |
649 | 95 u_char *lowcase_key; |
507 | 96 } ngx_table_elt_t; |
97 | |
98 | |
589 | 99 void *ngx_hash_find(ngx_hash_t *hash, ngx_uint_t key, u_char *name, size_t len); |
1253
8ef04207c84f
the "www.example.*" wildcard hash support
Igor Sysoev <igor@sysoev.ru>
parents:
1241
diff
changeset
|
100 void *ngx_hash_find_wc_head(ngx_hash_wildcard_t *hwc, u_char *name, size_t len); |
8ef04207c84f
the "www.example.*" wildcard hash support
Igor Sysoev <igor@sysoev.ru>
parents:
1241
diff
changeset
|
101 void *ngx_hash_find_wc_tail(ngx_hash_wildcard_t *hwc, u_char *name, size_t len); |
8ef04207c84f
the "www.example.*" wildcard hash support
Igor Sysoev <igor@sysoev.ru>
parents:
1241
diff
changeset
|
102 void *ngx_hash_find_combined(ngx_hash_combined_t *hash, ngx_uint_t key, |
8ef04207c84f
the "www.example.*" wildcard hash support
Igor Sysoev <igor@sysoev.ru>
parents:
1241
diff
changeset
|
103 u_char *name, size_t len); |
589 | 104 |
105 ngx_int_t ngx_hash_init(ngx_hash_init_t *hinit, ngx_hash_key_t *names, | |
106 ngx_uint_t nelts); | |
107 ngx_int_t ngx_hash_wildcard_init(ngx_hash_init_t *hinit, ngx_hash_key_t *names, | |
108 ngx_uint_t nelts); | |
109 | |
649 | 110 #define ngx_hash(key, c) ((ngx_uint_t) key * 31 + c) |
589 | 111 ngx_uint_t ngx_hash_key(u_char *data, size_t len); |
112 ngx_uint_t ngx_hash_key_lc(u_char *data, size_t len); | |
2136 | 113 ngx_uint_t ngx_hash_strlow(u_char *dst, u_char *src, size_t n); |
114 | |
589 | 115 |
593 | 116 ngx_int_t ngx_hash_keys_array_init(ngx_hash_keys_arrays_t *ha, ngx_uint_t type); |
117 ngx_int_t ngx_hash_add_key(ngx_hash_keys_arrays_t *ha, ngx_str_t *key, | |
118 void *value, ngx_uint_t flags); | |
119 | |
589 | 120 |
507 | 121 #endif /* _NGX_HASH_H_INCLUDED_ */ |