text: 
  /*
   * Copyright (c) 2015-2021 Agalmic Ventures LLC (www.agalmicventures.com)
   *
   * Permission is hereby granted, free of charge, to any person obtaining a copy
   * of this software and associated documentation files (the "Software"), to
   * deal in the Software without restriction, including without limitation the
   * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
   * sell copies of the Software, and to permit persons to whom the Software is
   * furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in
   * all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
   * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
   * IN THE SOFTWARE.
   */
  
  #pragma once
  
  #ifndef __MACH__
  #include <time.h>
  #else
  #include <sys/time.h>
  #endif
  
  #include "Werk/Utility/Attributes.hpp"
  
  namespace werk {
  
  /**
   * Returns the wall clock time, i.e. it is affected by NTP adjustments.
   */
  CHECKED inline uint64_t epochTime()
  {
  #ifdef __MACH__
  	struct timeval t;
  	if (0 != gettimeofday(&t, nullptr)) {
  		return 0;
  	}
  
  	//Only microsecond resolution, unfortunately
  	return static_cast<uint64_t>(t.tv_sec) * 1000000000llu + static_cast<uint64_t>(t.tv_usec) * 1000llu;
  #else
  	timespec t;
  	if (0 != clock_gettime(CLOCK_REALTIME, &t)) {
  		return 0;
  	}
  
  	return t.tv_sec * 1000000000llu + t.tv_nsec;
  #endif
  }
  
  /**
   * Returns a time which never decreases, i.e. it is not affected by NTP adjustments.
   */
  CHECKED inline uint64_t monotoneTime()
  {
  #ifdef __MACH__
  	struct timeval t;
  	if (0 != gettimeofday(&t, nullptr)) {
  		return 0;
  	}
  
  	//Only microsecond resolution, unfortunately
  	return static_cast<uint64_t>(t.tv_sec) * 1000000000llu + static_cast<uint64_t>(t.tv_usec) * 1000llu;
  #else
  	timespec t;
  	if (0 != clock_gettime(CLOCK_MONOTONIC, &t)) {
  		return 0;
  	}
  
  	return t.tv_sec * 1000000000llu + t.tv_nsec;
  #endif
  }
  
  class Clock
  {
  public:
  	CHECKED uint64_t time() const { return _time; }
  	void setTime(uint64_t time) { _time = time; }
  	void setEpochTime() { _time = epochTime(); }
  	void setMonotoneTime() { _time = monotoneTime(); }
  
  protected:
  	uint64_t _time = 0;
  };
  
  }
  