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/*
* Copyright (c) 2021 Cisco and/or its affiliates.
* 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.
*/
/**
* \file content_store.c
* \brief Implementation of hICN content_store
*/
#include "content_store.h"
#include "packet_cache.h"
extern const cs_ops_t cs_lru;
const cs_ops_t *const cs_vft[] = {
[CS_TYPE_LRU] = &cs_lru,
};
cs_t *_cs_create(cs_type_t type, size_t max_size) {
if (!CS_TYPE_VALID(type)) {
ERROR("[cs_create] Invalid content store type");
return NULL;
}
if (max_size == 0) max_size = DEFAULT_CS_SIZE;
cs_t *cs = malloc(sizeof(cs_t));
if (!cs) return NULL;
cs->type = type;
cs->num_entries = 0;
cs->max_size = max_size;
cs_vft[type]->initialize(cs);
cs->stats.lru = (cs_lru_stats_t){0};
return cs;
}
void cs_free(cs_t *cs) {
assert(cs);
cs_vft[cs->type]->finalize(cs);
free(cs);
}
void _cs_clear(cs_t **cs_ptr) {
cs_type_t cs_type = (*cs_ptr)->type;
size_t max_size = (*cs_ptr)->max_size;
// Free and recreate the CS
cs_free(*cs_ptr);
*cs_ptr = _cs_create(cs_type, max_size);
}
void cs_hit(cs_t *cs) {
cs->stats.lru.countHits++;
TRACE("ContentStore hit (hits %u, misses %u)", cs->stats.lru.countHits,
cs->stats.lru.countMisses);
}
void cs_miss(cs_t *cs) {
cs->stats.lru.countMisses++;
TRACE("ContentStore miss (hits %u, misses %u)", cs->stats.lru.countHits,
cs->stats.lru.countMisses);
}
void cs_log(cs_t *cs) {
DEBUG(
"Content store: size = %u, capacity = %u, hits = %u, misses = %u, adds = "
"%u, updates = %u, deletions = %u (with evictions = %u)",
cs->num_entries, cs->max_size, cs->stats.lru.countHits,
cs->stats.lru.countMisses, cs->stats.lru.countAdds,
cs->stats.lru.countUpdates, cs->stats.lru.countLruDeletions,
cs->stats.lru.countLruEvictions);
}
cs_lru_stats_t cs_get_lru_stats(cs_t *cs) { return cs->stats.lru; }
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