dyco

=桶言桶語=

2009-02-11

SingleTon模式的Thread_Safe

摘要:SingleTon模式的Thread_Safe

以下是SingleTon模式下,針對Multi-Thread做資料鎖定的做法:

class Sync
{
   public void Do(object state)
   {
      lock (this)
      {
         int j = (int)state;
         for (int i = 1; i <= 10; i++)
            Console.WriteLine("{0} - {1}", j, i);
      }
   }
}

下面則是另一種做法(看起來跟Java比較接近):

using System;
using System.Runtime.CompilerServices;
using System.Threading;

class Program
{
   public static void Main()
   {
      Sync s = new Sync();
      for (int i = 1; i <= 2; i++)
         new Thread(new ParameterizedThreadStart(s.Do)).Start(i);

      Console.ReadLine();
   }
}

class Sync
{
   [MethodImpl(MethodImplOptions.Synchronized)]
   public void Do(object state)
   {
      int j = (int)state;
      for (int i = 1; i <= 10; i++)
         Console.WriteLine("{0} - {1}", j, i);
   }
}