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59 lines
2.0 KiB
59 lines
2.0 KiB
/*
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* cache.h - Define the cache manager interface
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*
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* Copyright (C) 2013 - 2016, Max Lv <max.c.lv@gmail.com>
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*
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* This file is part of the shadowsocks-libev.
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*
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* shadowsocks-libev is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* shadowsocks-libev is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with shadowsocks-libev; see the file COPYING. If not, see
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* <http://www.gnu.org/licenses/>.
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*/
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/*
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* Original Author: Oliver Lorenz (ol), olli@olorenz.org, https://olorenz.org
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* License: This is licensed under the same terms as uthash itself
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*/
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#ifndef _CACHE_
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#define _CACHE_
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#include "uthash.h"
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/**
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* A cache entry
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*/
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struct cache_entry {
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char *key; /**<The key */
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void *data; /**<Payload */
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UT_hash_handle hh; /**<Hash Handle for uthash */
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};
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/**
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* A cache object
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*/
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struct cache {
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size_t max_entries; /**<Amount of entries this cache object can hold */
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struct cache_entry *entries; /**<Head pointer for uthash */
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void (*free_cb) (void *element); /**<Callback function to free cache entries */
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};
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extern int cache_create(struct cache **dst, const size_t capacity,
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void (*free_cb)(void *element));
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extern int cache_delete(struct cache *cache, int keep_data);
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extern int cache_lookup(struct cache *cache, char *key, size_t key_len, void *result);
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extern int cache_insert(struct cache *cache, char *key, size_t key_len, void *data);
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extern int cache_remove(struct cache *cache, char *key, size_t key_len);
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extern int cache_key_exist(struct cache *cache, char *key, size_t key_len);
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#endif
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