C# Is it possible to interrupt a specific thread inside a ThreadPool?

问题

Suppose that I've queued a work item in a ThreadPool, but the work item blocks if there is no data to process (reading from a BlockingQueue). If the queue is empty and there will be no more work going into the queue, then I must call the Thread.Interrupt method if I want to interrupt the blocking task, but how does one do the same thing with a ThreadPool?

The code might look like this:

void Run()
{
    try
    {
        while(true)
        {
            blockingQueue.Dequeue();
            doSomething();
        }
    }
    finally
    {
        countDownLatch.Signal();
    }
}

I'm aware that the best thing to do in this situation is use a regular Thread, but I'm wondering if there is a ThreadPool equivalent way to interrupt a work item.

回答1:

Which BlockingQueue is that? Is that a BCL class? TPL class? Or custom?

No matter; simply - I wouldn't. You could do something early in the thread's life to store the thread reference, but I simply wouldn't use the ThreadPool for this job as it sounds like it is longer running. A regular Thread would seem more appropriate.

I'm also surprised that there is no inbuilt method of telling the queue to release all the workers - I've written blocking queues before, and I tend to use the pattern (for example, from here):

public bool TryDequeue(out T value) {...}

with this:

returning true immediately if there is data
blocking and (eventually) returning true if there isn't data but some is added
blocking and (eventually) returning false if the queue is being shut down

来源：https://stackoverflow.com/questions/2430609/c-sharp-is-it-possible-to-interrupt-a-specific-thread-inside-a-threadpool

标签

multithreading

concurrency

threadpool

interrupt