72 lines
2.2 KiB
C
72 lines
2.2 KiB
C
/*
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* Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
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*
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* This program is free software: you can use, redistribute, and/or modify
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* it under the terms of the GNU Affero General Public License, version 3
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* or later ("AGPL"), as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _TD_UTIL_LRUCACHE_H_
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#define _TD_UTIL_LRUCACHE_H_
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#include "thash.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct SLRUCache SLRUCache;
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typedef void (*_taos_lru_deleter_t)(const void *key, size_t keyLen, void *value);
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typedef struct LRUHandle LRUHandle;
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typedef enum {
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TAOS_LRU_PRIORITY_HIGH,
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TAOS_LRU_PRIORITY_LOW
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} LRUPriority;
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typedef enum {
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TAOS_LRU_STATUS_OK,
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TAOS_LRU_STATUS_FAIL,
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TAOS_LRU_STATUS_INCOMPLETE,
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TAOS_LRU_STATUS_OK_OVERWRITTEN
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} LRUStatus;
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SLRUCache *taosLRUCacheInit(size_t capacity, int numShardBits, double highPriPoolRatio);
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void taosLRUCacheCleanup(SLRUCache *cache);
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LRUStatus taosLRUCacheInsert(SLRUCache *cache, const void *key, size_t keyLen, void *value, size_t charge,
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_taos_lru_deleter_t deleter, LRUHandle **handle, LRUPriority priority);
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LRUHandle *taosLRUCacheLookup(SLRUCache * cache, const void *key, size_t keyLen);
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void taosLRUCacheErase(SLRUCache * cache, const void *key, size_t keyLen);
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void taosLRUCacheEraseUnrefEntries(SLRUCache *cache);
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bool taosLRUCacheRef(SLRUCache *cache, LRUHandle *handle);
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bool taosLRUCacheRelease(SLRUCache *cache, LRUHandle *handle, bool eraseIfLastRef);
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void* taosLRUCacheValue(SLRUCache *cache, LRUHandle *handle);
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size_t taosLRUCacheGetUsage(SLRUCache *cache);
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size_t taosLRUCacheGetPinnedUsage(SLRUCache *cache);
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void taosLRUCacheSetCapacity(SLRUCache *cache, size_t capacity);
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size_t taosLRUCacheGetCapacity(SLRUCache *cache);
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void taosLRUCacheSetStrictCapacity(SLRUCache *cache, bool strict);
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bool taosLRUCacheIsStrictCapacity(SLRUCache *cache);
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#ifdef __cplusplus
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}
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#endif
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#endif // _TD_UTIL_LRUCACHE_H_
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