Csharp/CSharp Tutorial/Thread/synchronized

Shared Resource

<source lang="csharp">using System; using System.Collections.Generic; using System.Text; using System.Threading;

  class Tester{
     static int counter = 0;
     static void Main()
     {
        Thread t1 = new Thread( new ThreadStart( Incrementer ) );
        t1.IsBackground = true;
        t1.Name = "ThreadOne";
        t1.Start();
        Console.WriteLine( "Started thread {0}",t1.Name );
        Thread t2 = new Thread( new ThreadStart( Incrementer ) );
        t2.IsBackground = true;
        t2.Name = "ThreadTwo";
        t2.Start();
        Console.WriteLine( "Started thread {0}",t2.Name );
        t1.Join();
        t2.Join();
     }
     public static void Incrementer(){
        try{
           while ( counter < 1000 )
           {
              int temp = counter;
              temp++; 
              Thread.Sleep( 1 );
              counter = temp;
              Console.WriteLine("Thread {0}. Incrementer: {1}",Thread.CurrentThread.Name,counter );
           }
        }catch ( ThreadInterruptedException ){
           Console.WriteLine("Thread {0} interrupted! Cleaning up...",Thread.CurrentThread.Name );
        }
        finally
        {
           Console.WriteLine("Thread {0} Exiting. ",Thread.CurrentThread.Name );
        }
     }
  }</source>

Sync Delegate

<source lang="csharp">using System.Threading; using System;

 public delegate int BinaryOp(int x, int y);
 class Program
 {
   static void Main(string[] args)
   {
     Console.WriteLine("Main() invoked on thread {0}.",Thread.CurrentThread.ManagedThreadId);
     BinaryOp b = new BinaryOp(Add);
     int answer = b(10, 10);
     Console.WriteLine("Doing more work in Main()!");
     Console.WriteLine("10 + 10 is {0}.", answer);
     Console.ReadLine();
   }
   static int Add(int x, int y)
   {
     Console.WriteLine("Add() invoked on thread {0}.",Thread.CurrentThread.ManagedThreadId);
     Thread.Sleep(5000);
     return x + y;
   }
 }</source>

Using synchronized methods

<source lang="csharp">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 {

   private static int count = 0;
   private static object myMutex = new object();
   
   [MethodImpl(MethodImplOptions.Synchronized)]
   public static void Main()
   {
        count++;
   }

}</source>