source: branches/HeuristicLab.Problems.GaussianProcessTuning/ILNumerics.2.14.4735.573/Misc/ILThreadConfig.cs @ 10903

///
///    This file is part of ILNumerics Community Edition.
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///    ILNumerics Community Edition - high performance computing for applications.
///    Copyright (C) 2006 - 2012 Haymo Kutschbach, http://ilnumerics.net
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using System;
using System.Runtime.InteropServices;
using System.Diagnostics;
using System.Threading;

namespace Tester {
    internal class ILThreadConfig {
        [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        static extern int GetCurrentThreadId();
        [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        static extern bool GetProcessAffinityMask(IntPtr currentProcess, ref Int64 lpProcessAffinityMask, ref Int64 lpSystemAffinityMask);
        [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        public static extern int GetCurrentProcessorNumber();

        static void Main() {
            Int64 lpProcessAffinityMask = 0, lpSystemAffinityMask = 0;
            int i = 0, j = 0;
            Int64 procCount = Environment.ProcessorCount;
            Thread[] t = new Thread[procCount];

            IntPtr currentProcess = Process.GetCurrentProcess().Handle;
            Int64 currProcMask;

            GetProcessAffinityMask(currentProcess, ref lpProcessAffinityMask, ref lpSystemAffinityMask);

            Console.WriteLine("ProcessAffintityMask = {0}, SystemAffinityMask ={1}", lpProcessAffinityMask, lpSystemAffinityMask);

            for (i = 0; i < procCount; i++) {
                currProcMask = lpSystemAffinityMask & (1 << i);
                if (currProcMask >= 1) {
                    t[j] = new Thread(new ParameterizedThreadStart(DoWork));
                    object[] parameters = new object[] { currProcMask };
                    t[j++].Start(parameters);
                }
            }
            for (i = 0; i < j; i++) {
                t[i].Join();
            }
        }

        static void DoWork(object parameters) {

            object[] parameterArray = (object[])parameters;
            Int64 currProcMask = (Int64)parameterArray[0];

            foreach (ProcessThread pt in Process.GetCurrentProcess().Threads) {
                int utid = GetCurrentThreadId();
                if (utid == pt.Id) {
                    pt.ProcessorAffinity = (IntPtr)(currProcMask); // Set affinity for this thread to CPU #1
                    Thread.Sleep(10);
                    Console.WriteLine("Running on processor {0}", GetCurrentProcessorNumber());
                }
            }

        }
    }
}