如何检测.NET中的跨线程访问(强制线程关联)?

当我遇到这种情况时,我使用了一个我写的叫做“三人行”的类。它的全部目的是记录当前线程,并抛出来自不同线程的无效访问。您必须手动进行检查,但它为您封装了少量的工作。

class Foo {
  ThreadAffinity affinity = new ThreadAffinity();

  public string SomeProperty {
    get { affinity.Check(); return "Somevalue"; }
  }
}

等级

[Immutable]
public sealed class ThreadAffinity
{
    private readonly int m_threadId;

    public ThreadAffinity()
    {
        m_threadId = Thread.CurrentThread.ManagedThreadId;
    }

    public void Check()
    {
        if (Thread.CurrentThread.ManagedThreadId != m_threadId)
        {
            var msg = String.Format(
                "Call to class with affinity to thread {0} detected from thread {1}.",
                m_threadId,
                Thread.CurrentThread.ManagedThreadId);
            throw new InvalidOperationException(msg);
        }
    }
}

关于主题的博客文章:

• http://blogs.msdn.com/jaredpar/archive/2008/02/22/thread-affinity.aspx

您是否可以不要求读写方法采用线程或线程ID?然后,您可以将其与第一个调用它的代码进行比较,如果不匹配,则抛出异常或返回错误代码,或者忽略请求。

否则,你的建议也会奏效。您只需要比较线程ID。

与其比较线程ID,还不如存储 ambient Thread 在你的班上进行施工。

class SingleThreadedClass
{
    private Thread ownerThread;

    public SingleThreadedClass()
    {
        this.ownerThread = Thread.CurrentThread;
    }

    public void Read(...)
    {
        if (Thread.CurrentThread != this.ownerThread)
            throw new InvalidOperationException();
    }

    public void TakeOwnership()
    {
        this.ownerThread = Thread.CurrentThread;
    }
}