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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.
*/
#ifndef HICNLIGHT_CS_LRU_H
#define HICNLIGHT_CS_LRU_H
#define LRU_FAILURE 0
#define LRU_SUCCESS 1
#define LRU_EVICTION 2
typedef struct {
off_t prev;
off_t next;
} cs_entry_lru_state_t;
typedef struct {
off_t head;
off_t tail;
} cs_lru_state_t;
/**
* @brief Count the number of:
* - CS matches
* - CS misses
* - entries added to CS/LRU (upon receiving a data packet)
* - entries updated in the LRU
* (because an already-existing CS entry has been updated)
* - LRU evictions
*
* 'countExpiryEvictions' is not collected since an entry is never evicted
* because of expiration. An expired CS entry is only detected when
* a data packet with the same name is received, causing an update
* (NOT an actual eviction).
*/
typedef struct {
uint64_t countHits;
uint64_t countMisses;
uint64_t countAdds;
uint64_t countUpdates;
uint64_t countLruDeletions;
uint64_t countLruEvictions;
} cs_lru_stats_t;
#endif /* HICNLIGHT_CS_LRU_H */
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