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41 lines
911 B
C++
41 lines
911 B
C++
/*
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* Copyright (C) 2020-present ScyllaDB
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*/
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/*
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* SPDX-License-Identifier: LicenseRef-ScyllaDB-Source-Available-1.1
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*/
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#pragma once
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#include <atomic>
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namespace utils {
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/*
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* The neat_id class is purely a debugging thing -- when reading
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* the logs with object IDs in it it's more handy to look at those
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* consisting * of 1-3 digits, rather than 16 hex-digits of a printed
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* pointer.
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*
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* Embed with [[no_unique_address]] tag for memory efficiency
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*/
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template <bool Debug>
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struct neat_id {
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unsigned int operator()() const noexcept { return reinterpret_cast<uintptr_t>(this); }
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};
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template <>
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struct neat_id<true> {
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unsigned int _id;
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static unsigned int _next() noexcept {
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static std::atomic<unsigned int> rover {1};
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return rover.fetch_add(1);
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}
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neat_id() noexcept : _id(_next()) {}
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unsigned int operator()() const noexcept { return _id; }
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};
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} // namespace
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