Mercurial > hg > nginx-vendor-0-6
diff src/http/ngx_http_cache.h @ 0:f0b350454894 NGINX_0_1_0
nginx 0.1.0
*) The first public version.
author | Igor Sysoev <http://sysoev.ru> |
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date | Mon, 04 Oct 2004 00:00:00 +0400 |
parents | |
children | 6f8b0dc0f8dd |
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new file mode 100644 --- /dev/null +++ b/src/http/ngx_http_cache.h @@ -0,0 +1,131 @@ + +/* + * Copyright (C) Igor Sysoev + */ + + +#ifndef _NGX_HTTP_CACHE_H_INCLUDED_ +#define _NGX_HTTP_CACHE_H_INCLUDED_ + + +#include <ngx_config.h> +#include <ngx_core.h> +#include <ngx_http.h> + + +/* + * The 7 uses before an allocation. + * We can use maximum 7 bits, i.e up to the 127 uses. + */ +#define NGX_HTTP_CACHE_LAZY_ALLOCATION_BITS 3 + +typedef struct { + uint32_t crc; + ngx_str_t key; + time_t accessed; + + unsigned refs:20; /* 1048576 references */ + + unsigned count:NGX_HTTP_CACHE_LAZY_ALLOCATION_BITS; + + unsigned deleted:1; + unsigned expired:1; + unsigned memory:1; + unsigned mmap:1; + unsigned notify:1; + + ngx_fd_t fd; +#if (NGX_USE_HTTP_FILE_CACHE_UNIQ) + ngx_file_uniq_t uniq; /* no needed with kqueue */ +#endif + time_t last_modified; + time_t updated; + + union { + off_t size; + ngx_str_t value; + } data; +} ngx_http_cache_t; + + +typedef struct { + time_t expires; + time_t last_modified; + time_t date; + off_t length; + size_t key_len; + char key[1]; +} ngx_http_cache_header_t; + + +#define NGX_HTTP_CACHE_HASH 7 +#define NGX_HTTP_CACHE_NELTS 4 + +typedef struct { + ngx_http_cache_t *elts; + size_t hash; + size_t nelts; + time_t life; + time_t update; +#if (NGX_THREADS) + ngx_mutex_t mutex; +#endif + ngx_pool_t *pool; +} ngx_http_cache_hash_t; + + +typedef struct { + ngx_http_cache_hash_t *hash; + ngx_http_cache_t *cache; + ngx_file_t file; + ngx_str_t key; + uint32_t crc; + u_char md5[16]; + ngx_path_t *path; + ngx_buf_t *buf; + time_t expires; + time_t last_modified; + time_t date; + off_t length; + ssize_t header_size; + size_t file_start; + ngx_log_t *log; +} ngx_http_cache_ctx_t; + + + +#define NGX_HTTP_CACHE_STALE 1 +#define NGX_HTTP_CACHE_AGED 2 +#define NGX_HTTP_CACHE_THE_SAME 3 + + +ngx_http_cache_t *ngx_http_cache_get(ngx_http_cache_hash_t *cache, + ngx_http_cleanup_t *cleanup, + ngx_str_t *key, uint32_t *crc); + +ngx_http_cache_t *ngx_http_cache_alloc(ngx_http_cache_hash_t *hash, + ngx_http_cache_t *cache, + ngx_http_cleanup_t *cleanup, + ngx_str_t *key, uint32_t crc, + ngx_str_t *value, ngx_log_t *log); +void ngx_http_cache_free(ngx_http_cache_t *cache, + ngx_str_t *key, ngx_str_t *value, ngx_log_t *log); +void ngx_http_cache_lock(ngx_http_cache_hash_t *hash, ngx_http_cache_t *cache); +void ngx_http_cache_unlock(ngx_http_cache_hash_t *hash, + ngx_http_cache_t *cache, ngx_log_t *log); + +int ngx_http_cache_get_file(ngx_http_request_t *r, ngx_http_cache_ctx_t *ctx); +int ngx_http_cache_open_file(ngx_http_cache_ctx_t *ctx, ngx_file_uniq_t uniq); +int ngx_http_cache_update_file(ngx_http_request_t *r,ngx_http_cache_ctx_t *ctx, + ngx_str_t *temp_file); + +int ngx_http_send_cached(ngx_http_request_t *r); + + +int ngx_garbage_collector_http_cache_handler(ngx_gc_t *gc, ngx_str_t *name, + ngx_dir_t *dir); + +char *ngx_http_set_cache_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); + + +#endif /* _NGX_HTTP_CACHE_H_INCLUDED_ */