Mercurial > hg > nginx
annotate src/http/ngx_http_cache.h @ 2698:0750fdf45fcf
release-0.7.51 tag
author | Igor Sysoev <igor@sysoev.ru> |
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date | Sun, 12 Apr 2009 09:35:26 +0000 |
parents | d19979e0d980 |
children | b3b8c66bd520 |
rev | line source |
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
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4 */ |
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7 #ifndef _NGX_HTTP_CACHE_H_INCLUDED_ |
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8 #define _NGX_HTTP_CACHE_H_INCLUDED_ |
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11 #include <ngx_config.h> |
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12 #include <ngx_core.h> |
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13 #include <ngx_http.h> |
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14 |
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16 /**/ |
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17 #define NGX_HTTP_CACHE_STALE 1 |
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18 #define NGX_HTTP_CACHE_AGED 2 |
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19 #define NGX_HTTP_CACHE_THE_SAME 3 |
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20 /**/ |
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21 |
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22 #define NGX_HTTP_CACHE_KEY_LEN 16 |
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24 |
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25 typedef struct { |
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26 ngx_uint_t status; |
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27 time_t valid; |
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28 } ngx_http_cache_valid_t; |
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29 |
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30 |
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31 /* ngx_http_file_cache_node_t takes exactly 64 bytes on FreeBSD/i386 */ |
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32 |
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33 typedef struct { |
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34 ngx_rbtree_node_t node; |
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35 ngx_queue_t queue; |
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36 |
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37 u_char key[NGX_HTTP_CACHE_KEY_LEN |
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38 - sizeof(ngx_rbtree_key_t)]; |
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39 |
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40 unsigned count:20; |
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41 unsigned uses:10; |
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42 unsigned valid_msec:10; |
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43 unsigned error:10; |
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44 /* 7 unused bits */ |
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45 unsigned exists:1; |
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46 |
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47 ngx_file_uniq_t uniq; |
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48 time_t expire; |
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49 time_t valid_sec; |
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50 size_t body_start; |
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51 off_t length; |
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52 } ngx_http_file_cache_node_t; |
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55 struct ngx_http_cache_s { |
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56 ngx_file_t file; |
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57 ngx_array_t keys; |
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58 uint32_t crc32; |
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59 u_char key[NGX_HTTP_CACHE_KEY_LEN]; |
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60 |
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61 ngx_file_uniq_t uniq; |
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62 time_t valid_sec; |
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63 time_t last_modified; |
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64 time_t date; |
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65 |
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66 size_t header_start; |
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67 size_t body_start; |
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68 off_t length; |
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69 |
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70 ngx_uint_t min_uses; |
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71 ngx_uint_t uses; |
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72 ngx_uint_t error; |
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73 ngx_uint_t valid_msec; |
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74 |
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75 ngx_buf_t *buf; |
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76 |
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77 ngx_http_file_cache_t *file_cache; |
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78 ngx_http_file_cache_node_t *node; |
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79 |
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80 unsigned updated:1; |
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81 unsigned exists:1; |
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82 unsigned temp_file:1; |
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83 }; |
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84 |
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473 | 86 typedef struct { |
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87 time_t valid_sec; |
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88 time_t last_modified; |
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89 time_t date; |
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90 uint32_t crc32; |
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91 u_short valid_msec; |
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92 u_short header_start; |
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93 u_short body_start; |
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94 } ngx_http_file_cache_header_t; |
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96 | |
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97 struct ngx_http_file_cache_s { |
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98 ngx_rbtree_t *rbtree; |
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99 ngx_queue_t *queue; |
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100 ngx_slab_pool_t *shpool; |
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102 ngx_path_t *path; |
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103 |
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104 ngx_atomic_t *cold; |
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105 off_t *size; |
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106 |
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107 off_t max_size; |
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108 size_t bsize; |
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109 |
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110 time_t inactive; |
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111 |
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112 ngx_msec_t last; |
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113 ngx_uint_t files; |
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114 |
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115 ngx_shm_zone_t *shm_zone; |
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116 }; |
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117 |
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118 |
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119 void ngx_http_file_cache_create_key(ngx_http_request_t *r); |
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120 ngx_int_t ngx_http_file_cache_open(ngx_http_request_t *r); |
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121 void ngx_http_file_cache_set_header(ngx_http_request_t *r, u_char *buf); |
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122 void ngx_http_file_cache_update(ngx_http_request_t *r, ngx_temp_file_t *tf); |
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123 ngx_int_t ngx_http_cache_send(ngx_http_request_t *); |
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124 void ngx_http_file_cache_free(ngx_http_request_t *r, ngx_temp_file_t *tf); |
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125 time_t ngx_http_file_cache_valid(ngx_array_t *cache_valid, ngx_uint_t status); |
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126 |
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127 |
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128 char *ngx_http_file_cache_set_slot(ngx_conf_t *cf, ngx_command_t *cmd, |
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129 void *conf); |
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130 char *ngx_http_file_cache_valid_set_slot(ngx_conf_t *cf, ngx_command_t *cmd, |
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131 void *conf); |
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133 |
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134 #endif /* _NGX_HTTP_CACHE_H_INCLUDED_ */ |