Mercurial > hg > nginx
diff src/http/ngx_http_cache.c @ 97:70d2345a903f
nginx-0.0.1-2003-05-29-17:02:09 import
author | Igor Sysoev <igor@sysoev.ru> |
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date | Thu, 29 May 2003 13:02:09 +0000 |
parents | |
children | a059e1aa65d4 |
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new file mode 100644 --- /dev/null +++ b/src/http/ngx_http_cache.c @@ -0,0 +1,63 @@ + + + +#define NGX_HTTP_CACHE_ENTRY_DELETED 0x00000001 +#define NGX_HTTP_CACHE_ENTRY_MMAPED 0x00000002 + +/* "/" -> "/index.html" in ngx_http_index_handler */ +#define NGX_HTTP_CACHE_ENTRY_URI 0x00000004 + +#define NGX_HTTP_CACHE_FILTER_FLAGS 0xFFFF0000 + + +typedef struct { + ngx_fd_t fd; + off_t size; + void *data; + time_t accessed; + time_t last_modified; + time_t updated; /* no needed with kqueue */ + int refs; + int flags; +} ngx_http_cache_entry_t; + + +typedef struct { + u_int32_t crc; + ngx_str_t uri; + ngx_http_cache_t *cache; +} ngx_http_cache_hash_entry_t; + + +typedef struct { + ngx_http_cache_t *cache; + u_int32_t crc; + int n; +} ngx_http_cache_handle_t; + + +int ngx_http_cache_get(ngx_http_cache_hash_t *cache_hash, + ngx_str_t *uri, ngx_http_cache_handle_t *h) +{ + int hi; + ngx_http_cache_hash_entry_t *entry; + + h->crc = ngx_crc32(uri->data, uri->len); + + hi = h->crc % cache_hash->size; + entry = cache_hash[hi].elts; + + for (i = 0; i < cache_hash[hi].nelts; i++) { + if (entry[i].crc == crc + && entry[i].uri.len == uri->len + && ngx_strncmp(entry[i].uri.data, uri->data, uri->len) == 0 + { + h->cache = entry[i].cache; + h->cache->refs++; + h->n = hi; + return NGX_OK; + } + } + + return NGX_ERROR; +}