2913241df1
Use per CF-id reference count instead, and use handles as result of add operations. These must either be explicitly released or stored (rp_set), or they will release the corresponding replay_position upon destruction. Note: this does _not_ remove the replay positioning ordering requirement for mutations. It just removes it as a means to track segment liveness.
89 lines
2.3 KiB
C++
89 lines
2.3 KiB
C++
/*
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* 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, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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* Modified by ScyllaDB
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* Copyright (C) 2016 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 <unordered_map>
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#include "replay_position.hh"
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#include "commitlog.hh"
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namespace db {
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class rp_set {
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public:
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typedef std::unordered_map<segment_id_type, uint64_t> usage_map;
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rp_set()
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{}
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rp_set(const replay_position & rp)
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{
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put(rp);
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}
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rp_set(rp_set&&) = default;
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rp_set& operator=(rp_set&&) = default;
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void put(const replay_position& rp) {
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_usage[rp.id]++;
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}
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void put(rp_handle && h) {
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if (h) {
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put(h.rp());
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}
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h.release();
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}
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size_t size() const {
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return _usage.size();
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}
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bool empty() const {
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return _usage.empty();
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}
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const usage_map& usage() const {
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return _usage;
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}
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private:
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usage_map _usage;
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};
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}
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