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cache.h
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cache.h
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/*
* cache.c - Define the cache manager interface
*
* Copyright (C) 2013 - 2015, Max Lv <[email protected]>
*
* This file is part of the shadowsocks-libev.
*
* shadowsocks-libev is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* shadowsocks-libev is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with shadowsocks-libev; see the file COPYING. If not, see
* <http://www.gnu.org/licenses/>.
*/
/*
* Original Author: Oliver Lorenz (ol), [email protected], https://olorenz.org
* License: This is licensed under the same terms as uthash itself
*/
#ifndef _CACHE_
#define _CACHE_
#include "uthash.h"
/**
* A cache entry
*/
struct cache_entry {
char *key; /**<The key */
void *data; /**<Payload */
UT_hash_handle hh; /**<Hash Handle for uthash */
};
/**
* A cache object
*/
struct cache {
size_t max_entries; /**<Amount of entries this cache object can hold */
struct cache_entry *entries; /**<Head pointer for uthash */
void (*free_cb) (void *element); /**<Callback function to free cache entries */
};
extern int cache_create(struct cache **dst, const size_t capacity,
void (*free_cb)(void *element));
extern int cache_delete(struct cache *cache, int keep_data);
extern int cache_lookup(struct cache *cache, char *key, size_t key_len, void *result);
extern int cache_insert(struct cache *cache, char *key, size_t key_len, void *data);
extern int cache_remove(struct cache *cache, char *key, size_t key_len);
extern int cache_key_exist(struct cache *cache, char *key, size_t key_len);
#endif