Mercurial > hg > nginx
annotate src/core/ngx_hash.h @ 4309:3f6040cd731e
Added shmtx interface to forcibly unlock mutexes.
It is currently used from master process on abnormal worker termination to
unlock accept mutex (unlocking of accept mutex was broken in 1.0.2). It is
expected to be used in the future to unlock other mutexes as well.
Shared mutex code was rewritten to make this possible in a safe way, i.e.
with a check if lock was actually held by the exited process. We again use
pid to lock mutex, and use separate atomic variable for a count of processes
waiting in sem_wait().
| author | Maxim Dounin <mdounin@mdounin.ru> |
|---|---|
| date | Wed, 23 Nov 2011 13:55:38 +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; |
|
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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 { | |
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45 ngx_hash_t hash; |
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46 ngx_hash_wildcard_t *wc_head; |
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47 ngx_hash_wildcard_t *wc_tail; |
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48 } ngx_hash_combined_t; |
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49 |
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50 |
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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 | |
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83 ngx_array_t dns_wc_head; |
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84 ngx_array_t *dns_wc_head_hash; |
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85 |
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86 ngx_array_t dns_wc_tail; |
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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); |
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100 void *ngx_hash_find_wc_head(ngx_hash_wildcard_t *hwc, u_char *name, size_t len); |
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101 void *ngx_hash_find_wc_tail(ngx_hash_wildcard_t *hwc, u_char *name, size_t len); |
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102 void *ngx_hash_find_combined(ngx_hash_combined_t *hash, ngx_uint_t key, |
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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_ */ |