fcb8d040e8
Instead of lengthy blurbs, switch to single-line, machine-readable standardized (https://spdx.dev) license identifiers. The Linux kernel switched long ago, so there is strong precedent. Three cases are handled: AGPL-only, Apache-only, and dual licensed. For the latter case, I chose (AGPL-3.0-or-later and Apache-2.0), reasoning that our changes are extensive enough to apply our license. The changes we applied mechanically with a script, except to licenses/README.md. Closes #9937
58 lines
922 B
C++
58 lines
922 B
C++
/*
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*
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* Modified by ScyllaDB
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* Copyright (C) 2015-present 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 <deque>
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namespace utils {
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/**
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* bounded threadsafe deque
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*/
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class bounded_stats_deque {
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private:
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std::deque<long> _deque;
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long _sum = 0;
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int _max_size;
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public:
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bounded_stats_deque(int size)
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: _max_size(size) {
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}
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int size() const {
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return _deque.size();
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}
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void add(long i) {
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if (size() >= _max_size) {
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auto removed = _deque.front();
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_deque.pop_front();
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_sum -= removed;
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}
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_deque.push_back(i);
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_sum += i;
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}
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long sum() const {
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return _sum;
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}
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double mean() const {
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return size() > 0 ? ((double) sum()) / size() : 0;
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}
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const std::deque<long>& deque() const {
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return _deque;
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}
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};
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}
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