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
61 lines
1.1 KiB
C++
61 lines
1.1 KiB
C++
/*
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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
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*/
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#pragma once
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#include <chrono>
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/**
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* A helper class to keep track of latencies
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*/
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namespace utils {
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class latency_counter {
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public:
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using clock = std::chrono::steady_clock;
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using time_point = clock::time_point;
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using duration = clock::duration;
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private:
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time_point _start;
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time_point _stop;
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public:
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void start() {
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_start = now();
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}
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bool is_start() const {
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// if start is not set it is still zero
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return _start.time_since_epoch().count();
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}
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latency_counter& stop() {
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_stop = now();
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return *this;
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}
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bool is_stopped() const {
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// if stop was not set, it is still zero
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return _stop.time_since_epoch().count();
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}
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duration latency() const {
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return _stop - _start;
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}
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latency_counter& check_and_stop() {
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if (!is_stopped()) {
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return stop();
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}
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return *this;
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}
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static time_point now() {
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return clock::now();
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}
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};
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}
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