/* ====================================================================
 * Copyright (c) 2007 Andre Luis Azevedo (az.andrel@yahoo.com.br)
 * All rights reserved.
 *                       
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *    In addition, the source code must keep original namespace names.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution. In addition, the binary form must keep the original 
 *    namespace names and original file name.
 * 
 * 3. The name "ALAZ" or "ALAZ Library" must not be used to endorse or promote 
 *    products derived from this software without prior written permission.
 *
 * 4. Products derived from this software may not be called "ALAZ" or
 *    "ALAZ Library" nor may "ALAZ" or "ALAZ Library" appear in their 
 *    names without prior written permission of the author.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE. 
 */

using System;
using System.Threading;
using SystemEx.RuntimeEx.InteropServicesEx;

namespace ALAZ.System.Threading
{
    
    public class ThreadEx
    {

        #region LoopSleep

        public static void LoopSleep(ref int loopIndex)
        {

            if (Environment.ProcessorCount == 1 || (++loopIndex % (Environment.ProcessorCount * 50)) == 0)
            {
                //----- Single-core!
                //----- Switch to another running thread!
                Thread.Sleep(5);
            }
            else
            {
                //----- Multi-core / HT!
                //----- Loop n iterations!
                Thread.SpinWait(20);
            }

        }

        #endregion

        #region SleepEx

        public static void SleepEx(int milliseconds)
        {
            Thread.Sleep(milliseconds <= 0 ? 1 : milliseconds);
        }

        #endregion

    }
    
}