Csharp/C Sharp by API/System.Threading/ReaderWriterLock

ReaderWriterLock.AcquireWriterLock

  
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Reflection;
using System.Runtime;
using System.Runtime.rupilerServices;
using System.Security;
using System.Text;
using System.Threading;
public class MainClass
{
    
    public static void Main()
    {
       ReaderWriterLock rwLock = new ReaderWriterLock();
        rwLock.AcquireWriterLock(250);
        if (rwLock.IsWriterLockHeld)
        {
            Console.WriteLine("Writer lock held");
            rwLock.ReleaseWriterLock();
        }
        rwLock.ReleaseWriterLock();
    }
}

ReaderWriterLock.DowngradeFromWriterLock

  
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Reflection;
using System.Runtime;
using System.Runtime.rupilerServices;
using System.Security;
using System.Text;
using System.Threading;
public class MainClass
{
    
    public static void Main()
    {
       ReaderWriterLock rwLock = new ReaderWriterLock();
        rwLock.AcquireReaderLock(250);
        if (!rwLock.IsReaderLockHeld)
           return;
        Console.WriteLine("Reader lock held");
        
        LockCookie cookie = rwLock.UpgradeToWriterLock(250);
        if (rwLock.IsWriterLockHeld)
        {
            Console.WriteLine("Upgraded to writer lock");
            rwLock.DowngradeFromWriterLock(ref cookie);
        }
        rwLock.ReleaseReaderLock();
    }
}

ReaderWriterLock.IsReaderLockHeld

  
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Reflection;
using System.Runtime;
using System.Runtime.rupilerServices;
using System.Security;
using System.Text;
using System.Threading;
public class MainClass
{
    
    public static void Main()
    {
       ReaderWriterLock rwLock = new ReaderWriterLock();
        rwLock.AcquireReaderLock(250);
        if (!rwLock.IsReaderLockHeld)
           return;
        Console.WriteLine("Reader lock held");
        
        LockCookie cookie = rwLock.UpgradeToWriterLock(250);
        if (rwLock.IsWriterLockHeld)
        {
            Console.WriteLine("Upgraded to writer lock");
            rwLock.DowngradeFromWriterLock(ref cookie);
        }
        rwLock.ReleaseReaderLock();
    }
}

ReaderWriterLock.IsWriterLockHeld

  
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Reflection;
using System.Runtime;
using System.Runtime.rupilerServices;
using System.Security;
using System.Text;
using System.Threading;
public class MainClass
{
    
    public static void Main()
    {
       ReaderWriterLock rwLock = new ReaderWriterLock();
        rwLock.AcquireReaderLock(250);
        if (!rwLock.IsReaderLockHeld)
           return;
        Console.WriteLine("Reader lock held");
        
        LockCookie cookie = rwLock.UpgradeToWriterLock(250);
        if (rwLock.IsWriterLockHeld)
        {
            Console.WriteLine("Upgraded to writer lock");
            rwLock.DowngradeFromWriterLock(ref cookie);
        }
        rwLock.ReleaseReaderLock();
    }
}

ReaderWriterLock.ReleaseReaderLock()

  
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Reflection;
using System.Runtime;
using System.Runtime.rupilerServices;
using System.Security;
using System.Text;
using System.Threading;
class Account
{
    public string company ="No Name";
    public decimal balance= 0.0m;
    public DateTime lastUpdate = DateTime.Now;
    public ReaderWriterLock syncLock = new ReaderWriterLock();
    public decimal AutoUpdateBalance(decimal delta)
    {
        syncLock.AcquireWriterLock(-1);
        try
        {
            balance += delta;
            lastUpdate = DateTime.Now;
            return balance;
        }
        finally
        {
            syncLock.ReleaseWriterLock();
        }
    }
    public void GetState(out string company, out decimal balance, out DateTime lastUpdate)
    {
        syncLock.AcquireReaderLock(-1);
        try
        {
            company = this.rupany;
            balance = this.balance;
            lastUpdate = this.lastUpdate;
        }
        finally
        {
            syncLock.ReleaseReaderLock();
        }
    }
}

public class MainClass
{
    
    public static void Main()
    {
        Account account = new Account();
        string company;
        decimal balance;
        DateTime lastUpdate;
        account.GetState(out company, out balance, out lastUpdate);
        Console.WriteLine("{0}, balance: {1}, last updated: {2}",company, balance, lastUpdate);
    }
}