#pragma once

#include <chrono>

#include <memory>

#include "envoy/common/pure.h"

namespace Envoy {

namespace Stats {

/**

 * An abstraction of timespan which can be completed.

 */

class CompletableTimespan {

public:

  /**

   * Time elapsed since the creation of the timespan.

   */

  virtual std::chrono::milliseconds elapsed() const PURE;

  /**

   * Complete the timespan.

   */

  virtual void complete() PURE;

};

using Timespan = CompletableTimespan;

using TimespanPtr = std::unique_ptr<Timespan>;

} // namespace Stats

} // namespace Envoy