mirror of
https://github.com/ton-blockchain/ton
synced 2025-03-09 15:40:10 +00:00
107 lines
2.7 KiB
C++
107 lines
2.7 KiB
C++
/*
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This file is part of TON Blockchain Library.
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TON Blockchain Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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TON Blockchain Library 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 Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with TON Blockchain Library. If not, see <http://www.gnu.org/licenses/>.
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Copyright 2017-2020 Telegram Systems LLP
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*/
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#pragma once
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#include "td/utils/common.h"
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#include "td/utils/optional.h"
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#include <utility>
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namespace td {
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template <class StatT>
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class TimedStat {
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public:
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TimedStat(double duration, double now)
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: duration_(duration), current_(), current_timestamp_(now), next_(), next_timestamp_(now) {
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}
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TimedStat() : TimedStat(0, 0) {
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}
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template <class EventT>
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void add_event(const EventT &e, double now) {
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update(now);
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current_.on_event(e);
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next_.on_event(e);
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}
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const StatT &get_stat(double now) {
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update(now);
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return current_;
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}
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std::pair<StatT, double> stat_duration(double now) {
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update(now);
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return std::make_pair(current_, now - current_timestamp_);
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}
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void clear_events() {
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current_.clear();
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next_.clear();
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}
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private:
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double duration_;
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StatT current_;
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double current_timestamp_;
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StatT next_;
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double next_timestamp_;
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void update(double &now) {
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if (now < next_timestamp_) {
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// LOG_CHECK(now >= next_timestamp_ * (1 - 1e-14)) << now << " " << next_timestamp_;
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now = next_timestamp_;
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}
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if (duration_ == 0) {
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return;
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}
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if (next_timestamp_ + 2 * duration_ < now) {
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current_ = StatT();
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current_timestamp_ = now;
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next_ = StatT();
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next_timestamp_ = now;
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} else if (next_timestamp_ + duration_ < now) {
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current_ = next_;
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current_timestamp_ = next_timestamp_;
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next_ = StatT();
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next_timestamp_ = now;
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}
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}
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};
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template <class T, class Cmp>
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struct MinMaxStat {
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public:
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using Event = T;
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void on_event(Event event) {
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if (!best_ || Cmp()(event, best_.value())) {
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best_ = event;
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}
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}
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td::optional<T> get_stat() const {
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return best_.copy();
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}
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private:
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td::optional<T> best_;
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};
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template <class T>
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using MinStat = MinMaxStat<T, std::less<>>;
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template <class T>
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using MaxStat = MinMaxStat<T, std::greater<>>;
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} // namespace td
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