5937b1fa23
After fcb8d040 ("treewide: use Software Package Data Exchange
(SPDX) license identifiers"), many dual-licensed files were
left with empty comments on top. Remove them to avoid visual
noise.
Closes #10562
58 lines
1.4 KiB
C++
58 lines
1.4 KiB
C++
/*
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* Copyright (C) 2015-present ScyllaDB
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*
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* Modified by ScyllaDB
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*/
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/*
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* SPDX-License-Identifier: (AGPL-3.0-or-later and Apache-2.0)
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*/
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#pragma once
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#include "bytes.hh"
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#include "bloom_calculations.hh"
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namespace utils {
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struct i_filter;
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using filter_ptr = std::unique_ptr<i_filter>;
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enum class filter_format {
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k_l_format,
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m_format,
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};
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class hashed_key {
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private:
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std::array<uint64_t, 2> _hash;
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public:
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hashed_key(std::array<uint64_t, 2> h) : _hash(h) {}
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std::array<uint64_t, 2> hash() const { return _hash; };
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};
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hashed_key make_hashed_key(bytes_view key);
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// FIXME: serialize() and serialized_size() not implemented. We should only be serializing to
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// disk, not in the wire.
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struct i_filter {
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virtual ~i_filter() {}
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virtual void add(const bytes_view& key) = 0;
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virtual bool is_present(const bytes_view& key) = 0;
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virtual bool is_present(hashed_key) = 0;
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virtual void clear() = 0;
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virtual void close() = 0;
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virtual size_t memory_size() = 0;
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/**
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* @return The smallest bloom_filter that can provide the given false
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* positive probability rate for the given number of elements.
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*
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* Asserts that the given probability can be satisfied using this
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* filter.
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*/
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static filter_ptr get_filter(int64_t num_elements, double max_false_pos_prob, filter_format format);
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};
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}
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