锁定还会锁定在锁定块内使用的变量吗? [英] Does locking also lock the variables which is being used inside the locked block?

问题描述

class ThreadSafe
{
  public static readonly object _locker = new object();
  public static int _val1;
  public int _val2 = 1;
  public void Go()
  {
    lock (_locker)
    {
      if (_val2 != 0) Console.WriteLine (_val1 / _val2);
      _val2 = 0;
    }
  }
}

在上面的示例中，另一个线程是否可以更改_val2和_val1的值?

In the above example is it possible for another thread to change the values of _val2 and _val1?

推荐答案

lock关键字仅锁定对代码段的访问，而不能锁定对代码段的访问内部使用的数据.这意味着即使执行了锁定部分，另一个线程也可能同时修改_val1和_val2.

希望这会有所帮助，
弗雷德里克(Fredrik)

The lock keyword locks only access to the code section, not the data used inside of it. This means that it is possible for another thread to modify both _val1 and _val2 even when the locked section is executed.

Hope this helps,
Fredrik

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