保持两个线程之间的同步布尔值 [英] Keeping boolean values in sync between two threads

问题描述

在一个线程（线程2）我已经改变的值，例如

In one thread (thread2) I have changed a value e.g.

CheckSuccess = false;

现在主线程？（线程1 - GUI /表）不皮卡的变化，怎么会是可能的propogate的所有线程身边的变化

Now the main thread (thread1 - GUI / Form) does not pickup the change, how would it be possible to "propogate" the changes around all threads?

我下的是IM pression的线程应该处理数据，而不是在单独的情况下工作（除非告知这样做）

I was under the impression that threads should manipulate the data, not work on seperate instances (unless told to do so)

推荐答案

这似乎是一个竞争条件。为了避免这种情况，你应该同步的访问共享变量。

It seems like a Race Condition. To avoid this you should synchronize an access to the shared variables.

• 如果CheckSuccess是场 - 尝试通过挥发性关键字将其标记
。

• 如果 CheckSuccess 是一个属性（将被转换为一个方法调用），可以使用的锁定（）语句：

• If CheckSuccess is a field - try out marking it by volatile keyword.

• If CheckSuccess is a property (which will be translated to a method call) you can use lock() statement:

private static readonly object stateLock = new object();
lock (stateLock)
{
    // access a shared variable here
    CheckSuccess  = false;
}

如果 CheckSuccess 是UI控件的属性，你想从工作线程改变它 - 你应该使用特殊的技术，从工人到推送UI线程，这取决于哪个框架您正在使用WPF中的WinForms。

If CheckSuccess is a property of UI control and you want changing it from a worker thread - you should use special techniques to push changes from a worker to the UI thread, it depends on which framework you are using WinForms of WPF.

• 的WinForms - 如何从C＃中的另一个线程更新GUI
• 在WPF - 更新WPF在运行时
控制

• WinForms - How to update GUI from another thread in C#?
• WPF - Update WPF controls at run time

PS： 此外，如果你有编写多线程读取一个值，线程数（基本上比写作阅读更多的时候），你可能会发现有用的 ReaderWriterLock

PS: Also if you have multiple threads reading a value and few threads writing (basically reads more often than writing) you may find useful ReaderWriterLock

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