af2ec7c7e8
When doing a spares latency check, it is required to know if a latency object was started. This returns true if the start timer was set. Signed-off-by: Amnon Heiman <amnon@cloudius-systems.com>
60 lines
1.2 KiB
C++
60 lines
1.2 KiB
C++
/*
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* Copyright 2015 Cloudius Systems
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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 time_point = std::chrono::system_clock::time_point;
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using duration = std::chrono::system_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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int64_t latency_in_nano() const {
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return std::chrono::duration_cast<std::chrono::nanoseconds>(latency()).count();
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}
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static time_point now() {
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return std::chrono::system_clock::now();
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}
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};
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}
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