c# - 异常: Object synchronization method was called from an unsynchronized block of code

Question

我有几个写入同一int的线程。每个线程递增
整数值。同步增量操作的简单方法是什么？
锁语句仅对对象有效，因此我无法使用它。我也尝试过
下列的:

static int number=0;

static void Main(string[] args)
    {
        ThreadStart ts = new ThreadStart(strtThread);
        new Thread(ts).Start();
        new Thread(ts).Start();
        new Thread(ts).Start();
        new Thread(ts).Start();
        new Thread(ts).Start();
        new Thread(ts).Start();
        Console.ReadLine();
    }

    public static void strtThread()
    {
        bool lockTaken = false;

        Monitor.Enter(number,ref lockTaken);
        try
        {
            Random rd = new Random();
            int ee = rd.Next(1000);
            Console.WriteLine(ee);
            Thread.Sleep(ee);
            number++;
        }
        catch (Exception ex)
        {
            Console.WriteLine(ex.Message);
        }
        finally 
        {
            if (lockTaken)
            {
             Monitor.Exit(number);
            }

        }
    }

它给了我以下错误:

Object synchronization method was called from an unsynchronized block of code.

Answer 1

您可以使用Interlocked.Increment Method自动增加整数而不加锁定:

public static void strtThread()
{
    Interlocked.Increment(ref number);
}

如果您有多个语句，则可以创建一个 object实例，也可以创建 lock:

private static int number = 0;
private static readonly object gate = new object();

public static void strtThread()
{
    lock (gate)
    {
       number++;
    }    
}