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comparison src/http/ngx_http_cache.c @ 97:70d2345a903f

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nginx-0.0.1-2003-05-29-17:02:09 import
author Igor Sysoev <igor@sysoev.ru>
date Thu, 29 May 2003 13:02:09 +0000
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children a059e1aa65d4
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96:a23d010f356d 97:70d2345a903f
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4 #define NGX_HTTP_CACHE_ENTRY_DELETED 0x00000001
5 #define NGX_HTTP_CACHE_ENTRY_MMAPED 0x00000002
6
7 /* "/" -> "/index.html" in ngx_http_index_handler */
8 #define NGX_HTTP_CACHE_ENTRY_URI 0x00000004
9
10 #define NGX_HTTP_CACHE_FILTER_FLAGS 0xFFFF0000
11
12
13 typedef struct {
14 ngx_fd_t fd;
15 off_t size;
16 void *data;
17 time_t accessed;
18 time_t last_modified;
19 time_t updated; /* no needed with kqueue */
20 int refs;
21 int flags;
22 } ngx_http_cache_entry_t;
23
24
25 typedef struct {
26 u_int32_t crc;
27 ngx_str_t uri;
28 ngx_http_cache_t *cache;
29 } ngx_http_cache_hash_entry_t;
30
31
32 typedef struct {
33 ngx_http_cache_t *cache;
34 u_int32_t crc;
35 int n;
36 } ngx_http_cache_handle_t;
37
38
39 int ngx_http_cache_get(ngx_http_cache_hash_t *cache_hash,
40 ngx_str_t *uri, ngx_http_cache_handle_t *h)
41 {
42 int hi;
43 ngx_http_cache_hash_entry_t *entry;
44
45 h->crc = ngx_crc32(uri->data, uri->len);
46
47 hi = h->crc % cache_hash->size;
48 entry = cache_hash[hi].elts;
49
50 for (i = 0; i < cache_hash[hi].nelts; i++) {
51 if (entry[i].crc == crc
52 && entry[i].uri.len == uri->len
53 && ngx_strncmp(entry[i].uri.data, uri->data, uri->len) == 0
54 {
55 h->cache = entry[i].cache;
56 h->cache->refs++;
57 h->n = hi;
58 return NGX_OK;
59 }
60 }
61
62 return NGX_ERROR;
63 }