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annotate src/http/ngx_http_cache.h @ 201:267ea1d98683

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nginx-0.0.1-2003-11-30-23:03:18 import
author Igor Sysoev <igor@sysoev.ru>
date Sun, 30 Nov 2003 20:03:18 +0000
parents abeaebe0a33c
children 74994aeef848
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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1 #ifndef _NGX_HTTP_CACHE_H_INCLUDED_
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2 #define _NGX_HTTP_CACHE_H_INCLUDED_
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3
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4
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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5 #include <ngx_config.h>
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6 #include <ngx_core.h>
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7 #include <ngx_http.h>
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8
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9
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10 /*
267ea1d98683 nginx-0.0.1-2003-11-30-23:03:18 import
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11 * The 7 uses before an allocation.
267ea1d98683 nginx-0.0.1-2003-11-30-23:03:18 import
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12 * We can use maximum 7 bits, i.e up to the 127 uses.
267ea1d98683 nginx-0.0.1-2003-11-30-23:03:18 import
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13 */
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14 #define NGX_HTTP_CACHE_LAZY_ALLOCATION_BITS 3
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16 typedef struct {
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17 uint32_t crc;
267ea1d98683 nginx-0.0.1-2003-11-30-23:03:18 import
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18 ngx_str_t key;
267ea1d98683 nginx-0.0.1-2003-11-30-23:03:18 import
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19 time_t accessed;
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20
267ea1d98683 nginx-0.0.1-2003-11-30-23:03:18 import
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21 unsigned refs:20; /* 1048576 references */
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23 unsigned count:NGX_HTTP_CACHE_LAZY_ALLOCATION_BITS;
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24
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25 unsigned valid:1;
267ea1d98683 nginx-0.0.1-2003-11-30-23:03:18 import
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26 unsigned deleted:1;
267ea1d98683 nginx-0.0.1-2003-11-30-23:03:18 import
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27 unsigned memory:1;
267ea1d98683 nginx-0.0.1-2003-11-30-23:03:18 import
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28 unsigned mmap:1;
267ea1d98683 nginx-0.0.1-2003-11-30-23:03:18 import
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29 unsigned notify:1;
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30
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31 ngx_fd_t fd;
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32 #if (NGX_USE_HTTP_FILE_CACHE_UNIQ)
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33 ngx_file_uniq_t uniq; /* no needed with kqueue */
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34 #endif
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35 time_t last_modified;
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36 time_t updated;
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37
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38 union {
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267ea1d98683 nginx-0.0.1-2003-11-30-23:03:18 import
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39 off_t size;
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40 ngx_str_t value;
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41 } data;
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42 } ngx_http_cache_t;
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43
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44
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45 typedef struct {
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c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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46 time_t expires;
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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47 time_t last_modified;
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48 time_t date;
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49 off_t length;
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ea464a6c0581 nginx-0.0.1-2003-11-05-01:12:39 import
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50 size_t key_len;
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51 char key[1];
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c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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52 } ngx_http_cache_header_t;
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54
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55 #define NGX_HTTP_CACHE_HASH 7
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56 #define NGX_HTTP_CACHE_NELTS 4
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57
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58 typedef struct {
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59 ngx_http_cache_t *elts;
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60 size_t hash;
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61 size_t nelts;
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62 time_t life;
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63 time_t update;
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64 ngx_pool_t *pool;
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65 } ngx_http_cache_hash_t;
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66
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68 typedef struct {
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69 ngx_http_cache_hash_t *hash;
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70 ngx_http_cache_t *cache;
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71 ngx_file_t file;
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72 ngx_str_t key;
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73 uint32_t crc;
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74 u_char md5[16];
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75 ngx_path_t *path;
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76 ngx_hunk_t *buf;
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77 time_t expires;
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78 time_t last_modified;
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79 time_t date;
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80 off_t length;
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81 ssize_t header_size;
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82 size_t file_start;
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83 ngx_log_t *log;
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84 } ngx_http_cache_ctx_t;
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85
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86
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87
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88 #define NGX_HTTP_CACHE_STALE 1
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89 #define NGX_HTTP_CACHE_AGED 2
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90 #define NGX_HTTP_CACHE_THE_SAME 3
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91
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92
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93 ngx_http_cache_t *ngx_http_cache_get(ngx_http_cache_hash_t *cache,
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94 ngx_http_cleanup_t *cleanup,
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95 ngx_str_t *key, uint32_t *crc);
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96
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97 ngx_http_cache_t *ngx_http_cache_alloc(ngx_http_cache_hash_t *hash,
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98 ngx_http_cache_t *cache,
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99 ngx_http_cleanup_t *cleanup,
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100 ngx_str_t *key, uint32_t crc,
267ea1d98683 nginx-0.0.1-2003-11-30-23:03:18 import
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101 ngx_str_t *value, ngx_log_t *log);
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102 void ngx_http_cache_free(ngx_http_cache_t *cache,
267ea1d98683 nginx-0.0.1-2003-11-30-23:03:18 import
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103 ngx_str_t *key, ngx_str_t *value, ngx_log_t *log);
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104 void ngx_http_cache_unlock(ngx_http_cache_hash_t *hash,
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105 ngx_http_cache_t *cache, ngx_log_t *log);
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106
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107 int ngx_http_cache_get_file(ngx_http_request_t *r, ngx_http_cache_ctx_t *ctx);
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108 int ngx_http_cache_open_file(ngx_http_cache_ctx_t *ctx, ngx_file_uniq_t uniq);
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109 int ngx_http_cache_update_file(ngx_http_request_t *r,ngx_http_cache_ctx_t *ctx,
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110 ngx_str_t *temp_file);
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111
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267ea1d98683 nginx-0.0.1-2003-11-30-23:03:18 import
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112 int ngx_http_send_cached(ngx_http_request_t *r);
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113
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114
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115 int ngx_garbage_collector_http_cache_handler(ngx_gc_t *gc, ngx_str_t *name,
02a715e85df1 nginx-0.0.1-2003-11-19-00:34:08 import
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116 ngx_dir_t *dir);
197
0b81c7a0b133 nginx-0.0.1-2003-11-27-10:45:22 import
Igor Sysoev <igor@sysoev.ru>
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117
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a65b630b3a66 nginx-0.0.1-2003-11-28-11:40:40 import
Igor Sysoev <igor@sysoev.ru>
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118 char *ngx_http_set_cache_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
a65b630b3a66 nginx-0.0.1-2003-11-28-11:40:40 import
Igor Sysoev <igor@sysoev.ru>
parents: 197
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119
a65b630b3a66 nginx-0.0.1-2003-11-28-11:40:40 import
Igor Sysoev <igor@sysoev.ru>
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120
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c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
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121 #endif /* _NGX_HTTP_CACHE_H_INCLUDED_ */