Mercurial > hg > nginx
annotate src/http/ngx_http_cache.h @ 5879:c525c0454aa5
Cache: c->reading flag introduced.
It replaces c->buf in checks in ngx_http_file_cache_open(), making it possible
to reopen the file without clearing c->buf. No functional changes.
author | Maxim Dounin <mdounin@mdounin.ru> |
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date | Mon, 27 Oct 2014 21:14:07 +0300 |
parents | 2c89956b6a76 |
children | 78c49e243848 |
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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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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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_REVALIDATED 6 |
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23 #define NGX_HTTP_CACHE_HIT 7 |
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24 #define NGX_HTTP_CACHE_SCARCE 8 |
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25 |
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26 #define NGX_HTTP_CACHE_KEY_LEN 16 |
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27 #define NGX_HTTP_CACHE_ETAG_LEN 42 |
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28 #define NGX_HTTP_CACHE_VARY_LEN 42 |
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29 |
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30 #define NGX_HTTP_CACHE_VERSION 3 |
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31 |
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32 |
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33 typedef struct { |
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34 ngx_uint_t status; |
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35 time_t valid; |
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36 } ngx_http_cache_valid_t; |
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37 |
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38 |
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39 typedef struct { |
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40 ngx_rbtree_node_t node; |
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41 ngx_queue_t queue; |
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42 |
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43 u_char key[NGX_HTTP_CACHE_KEY_LEN |
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44 - sizeof(ngx_rbtree_key_t)]; |
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45 |
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46 unsigned count:20; |
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47 unsigned uses:10; |
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48 unsigned valid_msec:10; |
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49 unsigned error:10; |
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50 unsigned exists:1; |
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51 unsigned updating:1; |
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52 unsigned deleting:1; |
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53 /* 11 unused bits */ |
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54 |
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55 ngx_file_uniq_t uniq; |
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56 time_t expire; |
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57 time_t valid_sec; |
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58 size_t body_start; |
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59 off_t fs_size; |
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60 } ngx_http_file_cache_node_t; |
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61 |
469 | 62 |
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63 struct ngx_http_cache_s { |
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64 ngx_file_t file; |
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65 ngx_array_t keys; |
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66 uint32_t crc32; |
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67 u_char key[NGX_HTTP_CACHE_KEY_LEN]; |
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68 |
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69 ngx_file_uniq_t uniq; |
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70 time_t valid_sec; |
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71 time_t last_modified; |
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72 time_t date; |
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73 |
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74 ngx_str_t etag; |
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75 ngx_str_t vary; |
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76 u_char variant[NGX_HTTP_CACHE_KEY_LEN]; |
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77 |
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78 size_t header_start; |
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79 size_t body_start; |
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80 off_t length; |
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81 off_t fs_size; |
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82 |
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83 ngx_uint_t min_uses; |
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84 ngx_uint_t error; |
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85 ngx_uint_t valid_msec; |
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86 |
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87 ngx_buf_t *buf; |
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88 |
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89 ngx_http_file_cache_t *file_cache; |
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90 ngx_http_file_cache_node_t *node; |
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91 |
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92 ngx_msec_t lock_timeout; |
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93 ngx_msec_t wait_time; |
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94 |
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95 ngx_event_t wait_event; |
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96 |
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97 unsigned lock:1; |
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98 unsigned waiting:1; |
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99 |
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100 unsigned updated:1; |
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101 unsigned updating:1; |
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102 unsigned exists:1; |
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103 unsigned temp_file:1; |
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104 unsigned reading:1; |
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105 }; |
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106 |
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107 |
473 | 108 typedef struct { |
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109 ngx_uint_t version; |
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110 time_t valid_sec; |
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111 time_t last_modified; |
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112 time_t date; |
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113 uint32_t crc32; |
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114 u_short valid_msec; |
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115 u_short header_start; |
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116 u_short body_start; |
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117 u_char etag_len; |
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118 u_char etag[NGX_HTTP_CACHE_ETAG_LEN]; |
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119 u_char vary_len; |
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120 u_char vary[NGX_HTTP_CACHE_VARY_LEN]; |
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121 u_char variant[NGX_HTTP_CACHE_KEY_LEN]; |
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122 } ngx_http_file_cache_header_t; |
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124 | |
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125 typedef struct { |
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126 ngx_rbtree_t rbtree; |
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127 ngx_rbtree_node_t sentinel; |
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128 ngx_queue_t queue; |
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129 ngx_atomic_t cold; |
3018 | 130 ngx_atomic_t loading; |
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131 off_t size; |
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132 } ngx_http_file_cache_sh_t; |
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133 |
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134 |
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135 struct ngx_http_file_cache_s { |
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136 ngx_http_file_cache_sh_t *sh; |
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137 ngx_slab_pool_t *shpool; |
469 | 138 |
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139 ngx_path_t *path; |
201
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140 |
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141 off_t max_size; |
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142 size_t bsize; |
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143 |
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144 time_t inactive; |
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145 |
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146 ngx_uint_t files; |
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147 ngx_uint_t loader_files; |
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148 ngx_msec_t last; |
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149 ngx_msec_t loader_sleep; |
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150 ngx_msec_t loader_threshold; |
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151 |
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152 ngx_shm_zone_t *shm_zone; |
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153 }; |
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154 |
197
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155 |
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156 ngx_int_t ngx_http_file_cache_new(ngx_http_request_t *r); |
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157 ngx_int_t ngx_http_file_cache_create(ngx_http_request_t *r); |
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158 void ngx_http_file_cache_create_key(ngx_http_request_t *r); |
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159 ngx_int_t ngx_http_file_cache_open(ngx_http_request_t *r); |
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160 void ngx_http_file_cache_set_header(ngx_http_request_t *r, u_char *buf); |
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161 void ngx_http_file_cache_update(ngx_http_request_t *r, ngx_temp_file_t *tf); |
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162 void ngx_http_file_cache_update_header(ngx_http_request_t *r); |
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163 ngx_int_t ngx_http_cache_send(ngx_http_request_t *); |
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164 void ngx_http_file_cache_free(ngx_http_cache_t *c, ngx_temp_file_t *tf); |
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165 time_t ngx_http_file_cache_valid(ngx_array_t *cache_valid, ngx_uint_t status); |
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166 |
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167 char *ngx_http_file_cache_set_slot(ngx_conf_t *cf, ngx_command_t *cmd, |
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168 void *conf); |
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169 char *ngx_http_file_cache_valid_set_slot(ngx_conf_t *cf, ngx_command_t *cmd, |
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170 void *conf); |
469 | 171 |
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172 |
2952 | 173 extern ngx_str_t ngx_http_cache_status[]; |
174 | |
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175 |
170
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176 #endif /* _NGX_HTTP_CACHE_H_INCLUDED_ */ |