///
///    This file is part of ILNumerics Community Edition.
///
///    ILNumerics Community Edition - high performance computing for applications.
///    Copyright (C) 2006 - 2012 Haymo Kutschbach, http://ilnumerics.net
///
///    ILNumerics Community Edition is free software: you can redistribute it and/or modify
///    it under the terms of the GNU General Public License version 3 as published by
///    the Free Software Foundation.
///
///    ILNumerics Community Edition is distributed in the hope that it will be useful,
///    but WITHOUT ANY WARRANTY; without even the implied warranty of
///    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
///    GNU General Public License for more details.
///
///    You should have received a copy of the GNU General Public License
///    along with ILNumerics Community Edition. See the file License.txt in the root
///    of your distribution package. If not, see <http://www.gnu.org/licenses/>.
///
///    In addition this software uses the following components and/or licenses: 
///
///    =================================================================================
///    The Open Toolkit Library License
///    
///    Copyright (c) 2006 - 2009 the Open Toolkit library.
///    
///    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.
///
///    =================================================================================
///    

using System;
using System.Text;

namespace ILNumerics.Misc
{
	/// <summary>
	/// Measures time spans.
	/// </summary>
	internal class ILPerformer
	{
		private long m_start; 
		private long m_lastDuration; 
		public ILPerformer() {
			Tic();
		}
		public void Tic() {
			m_start = Environment.TickCount;
		}
		public String Toc() {
			long msec = Environment.TickCount;
			if (msec < m_start) 
				msec += Int32.MaxValue;  // recover overflow
			m_lastDuration = (msec - m_start); 
			return ToString();
		}
		public long Duration {
			get {
				return m_lastDuration;
			}
		}
		public override string ToString() {
			return m_lastDuration.ToString();
		}
	}
}