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82 lines
2.0 KiB
C++
82 lines
2.0 KiB
C++
// Licensed to the Apache Software Foundation (ASF) under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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#pragma once
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#include "LRU.h"
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#include "utils/Log.h"
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#include <string>
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#include <mutex>
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#include <atomic>
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#include <set>
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namespace zilliz {
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namespace milvus {
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namespace cache {
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template<typename ItemObj>
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class Cache {
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public:
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//mem_capacity, units:GB
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Cache(int64_t capacity_gb, uint64_t cache_max_count);
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~Cache() = default;
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int64_t usage() const {
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return usage_;
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}
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int64_t capacity() const {
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return capacity_;
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} //unit: BYTE
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void set_capacity(int64_t capacity); //unit: BYTE
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double freemem_percent() const {
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return freemem_percent_;
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}
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void set_freemem_percent(double percent) {
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freemem_percent_ = percent;
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}
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size_t size() const;
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bool exists(const std::string &key);
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ItemObj get(const std::string &key);
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void insert(const std::string &key, const ItemObj &item);
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void erase(const std::string &key);
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void print();
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void clear();
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private:
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void free_memory();
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private:
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int64_t usage_;
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int64_t capacity_;
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double freemem_percent_;
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LRU<std::string, ItemObj> lru_;
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mutable std::mutex mutex_;
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};
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} // namespace cache
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} // namespace milvus
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} // namespace zilliz
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#include "cache/Cache.inl"
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