46 lines
1.3 KiB
C++
46 lines
1.3 KiB
C++
/*
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* Copyright 2018-present ScyllaDB
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*/
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/*
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* This file is part of Scylla.
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*
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* Scylla is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Scylla is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Scylla. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <stdint.h>
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namespace ser {
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template <typename T>
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class serializer;
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};
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class cache_temperature {
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float hit_rate;
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explicit cache_temperature(uint8_t hr) : hit_rate(hr/255.0f) {}
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public:
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uint8_t get_serialized_temperature() const {
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return hit_rate * 255;
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}
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cache_temperature() : hit_rate(0) {}
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explicit cache_temperature(float hr) : hit_rate(hr) {}
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explicit operator float() const { return hit_rate; }
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static cache_temperature invalid() { return cache_temperature(-1.0f); }
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friend struct ser::serializer<cache_temperature>;
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};
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