lidar_timer.h

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/******************************************************************************
 * Copyright 2018 The Apollo Authors. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *****************************************************************************/
#pragma once

#include <chrono>

namespace apollo {
namespace perception {
namespace lidar {

class Timer {
 public:
  Timer() { tic(); }
  void tic() { _start = std::chrono::system_clock::now(); }
  double toc(bool reset = false) {
    auto time = std::chrono::system_clock::now();
    std::chrono::duration<double, std::milli> dur = time - _start;
    if (reset) {
      tic();
    }
    return dur.count();
  }

 private:
  std::chrono::time_point<std::chrono::system_clock> _start;
};

}  // namespace lidar
}  // namespace perception
}  // namespace apollo