[C#.NET][Thread] 小心使用執行緒的鎖定物件

2012-10-17

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Thread
2013-08-16

假設我對一個耗時的工作使用了ThreadPool，當我實體化多個執行個體時，不同的執行個體都要能各自工作。


public class DemoClass
{
    private static object s_lock = new object();
    private ulong m_value = 0;

    public void DoWork(string name)
    {
        ThreadPool.QueueUserWorkItem(o =>
        {
            lock (s_lock)
            {
                for (ulong i = 0; i < 1000000; i++)
                {
                    m_value = i;
                    Console.WriteLine(string.Format("{0} method value = {1}", name, m_value));
                    Thread.Sleep(1000);
                }
            }
        });
    }
}

實體化類別


internal class Program
{
    private static void Main(string[] args)
    {
        DemoClass c1 = new DemoClass();
        DemoClass c2 = new DemoClass();
        c1.DoWork("NO.1");
        Thread.Sleep(1000);
        c2.DoWork("NO.2");
        Console.ReadKey();
    }
}