CompareInfoResurrection

CompareInfoResurrection.cs

using System;
using System.Globalization;
using System.Threading;
using System.Threading.Tasks;
using System.Runtime.CompilerServices;

class Program
{
    readonly static string s_shortString = new string((char)257, 1);
    readonly static string s_longString = new string((char)257, 1000000);

    static volatile CompareInfo s_resurectedCompareInfo;

    CompareInfo _compareInfo;
    Program()
    {
        _compareInfo = new CultureInfo("cz-cz", useUserOverride: false).CompareInfo;

        _compareInfo.GetHashCode(s_shortString, CompareOptions.IgnoreCase);
    }

    ~Program()
    {
        s_resurectedCompareInfo = _compareInfo;
    }

    [MethodImpl(MethodImplOptions.NoInlining)]
    static void Allocate()
    {
        new Program();
    }

    static void Pooler()
    {
        for (;;)
        {
            var compareInfo = s_resurectedCompareInfo;
            if (compareInfo != null)
            {
                s_resurectedCompareInfo = null;
                try
                {
                    compareInfo.GetHashCode(s_longString, CompareOptions.IgnoreCase);
                    compareInfo.GetHashCode(s_longString, CompareOptions.IgnoreCase);
                } 
                catch
                {
                }
            }
        }
    }

    static void Main(string[] args)
    {
        new Thread(Pooler).Start();

        for (int i = 0; i < 1000; i++)
        {
            Console.WriteLine(i.ToString());
            Allocate();
            GC.Collect();
            GC.WaitForPendingFinalizers();
            while (s_resurectedCompareInfo != null) { Thread.Sleep(1); }
        }
    }
}