56 lines
758 B
C++
56 lines
758 B
C++
#ifndef INSTANT_20231013102058
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#define INSTANT_20231013102058
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#include <chrono>
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namespace nm
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{
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class Instant {
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public:
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static Instant now()
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{
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return { std::chrono::steady_clock::now() };
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}
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auto elapse_usec()
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{
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return diff().count() / 1e3;
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}
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auto elapse_ms()
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{
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return diff().count() / 1e6;
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}
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auto elapse_sec()
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{
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return diff().count() / 1e9;
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}
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auto elapse_min()
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{
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return elapse_sec() / 60.0;
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}
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void reset()
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{
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*this = now();
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}
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private:
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using timepoint = std::chrono::steady_clock::time_point;
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Instant(timepoint now) : tp_ { now }
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{
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}
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auto diff() -> std::chrono::duration<double, std::nano>
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{
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return std::chrono::steady_clock::now() - tp_;
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}
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timepoint tp_;
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};
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} // namespace nm
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#endif // INSTANT_20231013102058
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