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/*
* Copyright (C) 2018 "IoT.bzh"
* Author José Bollo <jose.bollo@iot.bzh>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
/******************************************************************************/
/******************************************************************************/
/* IMPLEMENTATION OF CACHE IN CLIENTS */
/******************************************************************************/
/******************************************************************************/
/** opaque structure for cache */
typedef struct cache cache_t;
/**
* Search the stored value for the key
* @param cache the cache handler
* @param key the key to search
* @return the stored value or -ENOENT if not found
*/
extern
int
cache_search(
cache_t *cache,
const cynagora_key_t *key
);
/**
* Add the value for the key in the cache
* @param cache the cache handler
* @param key the key to cache
* @param value the value (must be an integer from -128 to 127)
* @param expire expiration date
* @return 0 on success
* -EINVAL invalid argument
* -ENOMEM too big for the cache size
*/
extern
int
cache_put(
cache_t *cache,
const cynagora_key_t *key,
int value,
time_t expire,
bool absolute
);
/**
* Clear the content of the cache if the cacheid doesn't match the current one
* @param cache the cache handler
* @param cacheid the cacheid to set or zero to force clearing
*/
extern
void
cache_clear(
cache_t *cache,
uint32_t cacheid
);
/**
*
* @param cache pointer to the cache handler
* @param newsize new size to set to the cache
* @return 0 on success
* -ENOMEM not enough memory
*/
extern
int
cache_resize(
cache_t **cache,
uint32_t newsize
);
/**
*
* @param cache pointer to the cache handler
* @param size size to set to the cache
* @return 0 on success
* -ENOMEM not enough memory
*/
extern
int
cache_create(
cache_t **cache,
uint32_t size
);
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