Mercurial > hg > nginx-quic

annotate src/http/ngx_http_cache.h @ 4515:8bb695c05870 stable-1.0

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Merge of r4498: Fix of rbtree lookup on hash collisions. Previous code incorrectly assumed that nodes with identical keys are linked together. This might not be true after tree rebalance. Patch by Lanshun Zhou.
author Maxim Dounin <mdounin@mdounin.ru>
date Mon, 05 Mar 2012 13:17:56 +0000
parents 4919fb357a5d
children
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 * Copyright (C) Nginx, Inc.
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5 */
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8 #ifndef _NGX_HTTP_CACHE_H_INCLUDED_
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9 #define _NGX_HTTP_CACHE_H_INCLUDED_
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12 #include <ngx_config.h>
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13 #include <ngx_core.h>
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14 #include <ngx_http.h>
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16
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17 #define NGX_HTTP_CACHE_MISS 1
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18 #define NGX_HTTP_CACHE_BYPASS 2
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19 #define NGX_HTTP_CACHE_EXPIRED 3
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20 #define NGX_HTTP_CACHE_STALE 4
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21 #define NGX_HTTP_CACHE_UPDATING 5
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22 #define NGX_HTTP_CACHE_HIT 6
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23 #define NGX_HTTP_CACHE_SCARCE 7
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24
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25 #define NGX_HTTP_CACHE_KEY_LEN 16
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28 typedef struct {
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29 ngx_uint_t status;
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30 time_t valid;
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31 } ngx_http_cache_valid_t;
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32
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33
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34 typedef struct {
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35 ngx_rbtree_node_t node;
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36 ngx_queue_t queue;
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37
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38 u_char key[NGX_HTTP_CACHE_KEY_LEN
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39 - sizeof(ngx_rbtree_key_t)];
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40
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41 unsigned count:20;
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42 unsigned uses:10;
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43 unsigned valid_msec:10;
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44 unsigned error:10;
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45 unsigned exists:1;
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46 unsigned updating:1;
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47 unsigned deleting:1;
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48 /* 11 unused bits */
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49
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50 ngx_file_uniq_t uniq;
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51 time_t expire;
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52 time_t valid_sec;
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53 size_t body_start;
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54 off_t fs_size;
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55 } ngx_http_file_cache_node_t;
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56
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57
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58 struct ngx_http_cache_s {
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59 ngx_file_t file;
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60 ngx_array_t keys;
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61 uint32_t crc32;
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62 u_char key[NGX_HTTP_CACHE_KEY_LEN];
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63
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64 ngx_file_uniq_t uniq;
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65 time_t valid_sec;
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66 time_t last_modified;
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67 time_t date;
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68
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69 size_t header_start;
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70 size_t body_start;
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71 off_t length;
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72 off_t fs_size;
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73
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74 ngx_uint_t min_uses;
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75 ngx_uint_t error;
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76 ngx_uint_t valid_msec;
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77
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78 ngx_buf_t *buf;
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79
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80 ngx_http_file_cache_t *file_cache;
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81 ngx_http_file_cache_node_t *node;
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82
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83 unsigned updated:1;
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84 unsigned updating:1;
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85 unsigned exists:1;
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86 unsigned temp_file:1;
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87 };
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89
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90 typedef struct {
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91 time_t valid_sec;
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92 time_t last_modified;
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93 time_t date;
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94 uint32_t crc32;
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95 u_short valid_msec;
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96 u_short header_start;
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97 u_short body_start;
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98 } ngx_http_file_cache_header_t;
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99
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100
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101 typedef struct {
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102 ngx_rbtree_t rbtree;
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103 ngx_rbtree_node_t sentinel;
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104 ngx_queue_t queue;
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105 ngx_atomic_t cold;
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106 ngx_atomic_t loading;
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107 off_t size;
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108 } ngx_http_file_cache_sh_t;
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109
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110
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111 struct ngx_http_file_cache_s {
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112 ngx_http_file_cache_sh_t *sh;
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113 ngx_slab_pool_t *shpool;
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114
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115 ngx_path_t *path;
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116
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117 off_t max_size;
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118 size_t bsize;
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119
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120 time_t inactive;
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121
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122 ngx_msec_t last;
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123 ngx_uint_t files;
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124
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125 ngx_shm_zone_t *shm_zone;
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126 };
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127
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128
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129 ngx_int_t ngx_http_file_cache_new(ngx_http_request_t *r);
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130 ngx_int_t ngx_http_file_cache_create(ngx_http_request_t *r);
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131 void ngx_http_file_cache_create_key(ngx_http_request_t *r);
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132 ngx_int_t ngx_http_file_cache_open(ngx_http_request_t *r);
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133 void ngx_http_file_cache_set_header(ngx_http_request_t *r, u_char *buf);
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134 void ngx_http_file_cache_update(ngx_http_request_t *r, ngx_temp_file_t *tf);
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135 ngx_int_t ngx_http_cache_send(ngx_http_request_t *);
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136 void ngx_http_file_cache_free(ngx_http_cache_t *c, ngx_temp_file_t *tf);
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137 time_t ngx_http_file_cache_valid(ngx_array_t *cache_valid, ngx_uint_t status);
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138
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139 char *ngx_http_file_cache_set_slot(ngx_conf_t *cf, ngx_command_t *cmd,
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parents: 477
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140 void *conf);
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141 char *ngx_http_file_cache_valid_set_slot(ngx_conf_t *cf, ngx_command_t *cmd,
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parents: 477
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142 void *conf);
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143
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144
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0998606fbfd4 $upstream_cache_status
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145 extern ngx_str_t ngx_http_cache_status[];
0998606fbfd4 $upstream_cache_status
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parents: 2927
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146
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a65b630b3a66 nginx-0.0.1-2003-11-28-11:40:40 import
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147
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c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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148 #endif /* _NGX_HTTP_CACHE_H_INCLUDED_ */