Use lock to synchronize access to an object

/*
C#: The Complete Reference 
by Herbert Schildt 

Publisher: Osborne/McGraw-Hill (March 8, 2002)
ISBN: 0072134852
*/


// Use lock to synchronize access to an object.  
 
using System; 
using System.Threading; 
 
class SumArray {  
  int sum;  
  
  public int sumIt(int[] nums) {  
    lock(this) { // lock the entire method 
      sum = 0; // reset sum  
    
      for(int i=0; i < nums.Length; i++) {  
        sum += nums[i];  
        Console.WriteLine("Running total for " +  
               Thread.CurrentThread.Name +  
               " is " + sum);  
        Thread.Sleep(10); // allow task-switch  
      }  
      return sum; 
    } 
  }  
}   
  
class MyThread {  
  public Thread thrd;  
  int[] a;  
  int answer; 
 
  /* Create one SumArray object for all 
     instances of MyThread. */ 
  static SumArray sa = new SumArray();  
 
  // Construct a new thread.  
  public MyThread(string name, int[] nums) {  
    a = nums;  
    thrd = new Thread(new ThreadStart(this.run)); 
    thrd.Name = name; 
    thrd.Start(); // start the thread  
  }  
  
  // Begin execution of new thread.  
  void run() {  
    Console.WriteLine(thrd.Name + " starting.");  
  
    answer = sa.sumIt(a);           
 
    Console.WriteLine("Sum for " + thrd.Name +  
                       " is " + answer);  
  
    Console.WriteLine(thrd.Name + " terminating.");  
  }  
}  
  
public class Sync {  
  public static void Main() {  
    int[] a = {1, 2, 3, 4, 5};  
  
    MyThread mt1 = new MyThread("Child #1", a);  
    MyThread mt2 = new MyThread("Child #2", a);  
  
    mt1.thrd.Join();  
    mt2.thrd.Join();  
  }  
}

1.	A synchronized shared buffer implementation
2.	illustrates the use of the Mutex object
3.	Another way to use lock to synchronize access to an object
4.	Use Wait() and Pulse() to create a ticking clock
5.	Use MethodImplAttribute to synchronize a method
6.	My Main Class Async Call back
7.	MyMain Class Async Wait Timeout
8.	Threading Class Mutex
9.	Threading and Asynchronous Operations:Access Reordering and Volatile
10.	Asynchronous Calls:A Simple Example 1
11.	Asynchronous Calls:A Simple Example 2
12.	Asynchronous Calls:Return Values
13.	Asynchronous Calls:Waiting for Completion
14.	Asynchronous Calls:Waiting for Completion 2
15.	Data Protection and Synchronization:A Slightly Broken Example

Use lock to synchronize access to an object : Thread Sync « Thread « C# / C Sharp

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