// DeadLockSample.cs
// 分析一下为什么会发生死锁？

using System;

using System.Threading;



public class Test

{

    static readonly object firstLock = new object();

    static readonly object secondLock = new object();

    

    static void Main()

    {

        new Thread(new ThreadStart(ThreadJob)).Start();

        

        // Wait until we're fairly sure the other thread

        // has grabbed firstLock

        Thread.Sleep(500);

        

        Console.WriteLine ("Locking secondLock");

        lock (secondLock)

        {

            Console.WriteLine ("Locked secondLock");

            Console.WriteLine ("Locking firstLock");

            lock (firstLock)

            {

                Console.WriteLine ("Locked firstLock");

            }

            Console.WriteLine ("Released firstLock");

        }

        Console.WriteLine("Released secondLock");

    }

    

    static void ThreadJob()

    {

        Console.WriteLine ("\t\t\t\tLocking firstLock");

        lock (firstLock)

        {

            Console.WriteLine("\t\t\t\tLocked firstLock");

            // Wait until we're fairly sure the first thread

            // has grabbed secondLock

            Thread.Sleep(1000);

            Console.WriteLine("\t\t\t\tLocking secondLock");

            lock (secondLock)

            {

                Console.WriteLine("\t\t\t\tLocked secondLock");

            }

            Console.WriteLine ("\t\t\t\tReleased secondLock");

        }

        Console.WriteLine("\t\t\t\tReleased firstLock");

    
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