text: /*
   * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
   *
   * SPDX-License-Identifier: BSD-2-Clause
   */
  
  #include <AK/Assertions.h>
  #include <AK/Time.h>
  #include <LibCore/ElapsedTimer.h>
  #include <sys/time.h>
  #include <time.h>
  
  namespace Core {
  
  void ElapsedTimer::start()
  {
      m_valid = true;
      timespec now_spec;
      clock_gettime(m_precise ? CLOCK_MONOTONIC : CLOCK_MONOTONIC_COARSE, &now_spec);
      m_origin_time.tv_sec = now_spec.tv_sec;
      m_origin_time.tv_usec = now_spec.tv_nsec / 1000;
  }
  
  int ElapsedTimer::elapsed() const
  {
      VERIFY(is_valid());
      struct timeval now;
      timespec now_spec;
      clock_gettime(m_precise ? CLOCK_MONOTONIC : CLOCK_MONOTONIC_COARSE, &now_spec);
      now.tv_sec = now_spec.tv_sec;
      now.tv_usec = now_spec.tv_nsec / 1000;
      struct timeval diff;
      timeval_sub(now, m_origin_time, diff);
      return diff.tv_sec * 1000 + diff.tv_usec / 1000;
  }
  
  }
  