observe_time.h

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// Copyright 2022 Stéphane Caron
// SPDX-License-Identifier: Apache-2.0
 
#pragma once
 
#include <palimpsest/Dictionary.h>
 
namespace vulp::observation {
 
using palimpsest::Dictionary;
 
inline void observe_time(Dictionary& observation) {
  using std::chrono::duration_cast;
  using std::chrono::microseconds;
  const auto now = std::chrono::system_clock::now();
  const auto time_since_epoch = now.time_since_epoch();
  const auto nb_us = duration_cast<microseconds>(time_since_epoch).count();
  observation("time") = static_cast<double>(nb_us) / 1e6;
}
 
}  // namespace vulp::observation