C# 线程如何相互通信？

线程如何相互通信？他们彼此不使用价值观，那么他们之间的沟通方式是什么呢？

线程可以共享价值观，但在这样做时必须小心。在.Net中，最常用的方法是

lock

语句和联锁类

“它们不使用彼此的值”-同一进程中的两个线程可以看到公共变量，因此这就是simples方法。因此，我们使用各种同步、锁定、mutices和sempahores来等待条件并唤醒等待的线程

---

在Java中，您使用各种原语，例如同步。您可以阅读此

线程之间有几种通信方式。该列表并非详尽无遗，但确实包含了最常用的策略

• 共享内存，如变量或其他数据结构
• 同步原语，如锁和符号
• 事件，如

  ManualResetEvent

  或

  AutoResetEvent

共享内存

public static void Main()
{
  string text = "Hello World";
  var thread = new Thread(
    () =>
    {
      Console.WriteLine(text); // variable read by worker thread
    });
  thread.Start();
  Console.WriteLine(text); // variable read by main thread
}

同步原语

public static void Main()
{
  var lockObj = new Object();
  int x = 0;
  var thread = new Thread(
    () =>
    {
      while (true)
      {
        lock (lockObj) // blocks until main thread releases the lock
        {
          x++;
        }
      }
    });
  thread.Start();
  while (true)
  {
    lock (lockObj) // blocks until worker thread releases the lock
    {
      x++;
      Console.WriteLine(x);
    }
  }
}

public static void Main()
{
  var are = new AutoResetEvent(false);
  var thread = new Thread(
    () =>
    {
      while (true)
      {
        Thread.Sleep(1000);
        are.Set(); // worker thread signals the event
      }
    });
  thread.Start();
  while (are.WaitOne()) // main thread waits for the event to be signaled
  {
    Console.WriteLine(DateTime.Now);
  }
}

事件

public static void Main()
{
  var lockObj = new Object();
  int x = 0;
  var thread = new Thread(
    () =>
    {
      while (true)
      {
        lock (lockObj) // blocks until main thread releases the lock
        {
          x++;
        }
      }
    });
  thread.Start();
  while (true)
  {
    lock (lockObj) // blocks until worker thread releases the lock
    {
      x++;
      Console.WriteLine(x);
    }
  }
}

public static void Main()
{
  var are = new AutoResetEvent(false);
  var thread = new Thread(
    () =>
    {
      while (true)
      {
        Thread.Sleep(1000);
        are.Set(); // worker thread signals the event
      }
    });
  thread.Start();
  while (are.WaitOne()) // main thread waits for the event to be signaled
  {
    Console.WriteLine(DateTime.Now);
  }
}

---

除了已经给出的答案外，在这里查看一本免费电子书，该书对C#中线程的工作原理进行了相当深入的介绍：