我应该如何在 C# 中编写生产者/消费者代码? [英] How should i write producer /consumer code in C#?

问题描述

我有 1 个线程流数据和第二个(线程池)处理数据.数据处理大约需要 100 毫秒，所以我使用第二个线程，以免阻塞第一个线程.

I have 1 thread streaming data and a 2nd (the threadpool) processing the data. The data processing takes around 100ms so I use to second thread so not to hold up the 1st thread.

当第二个线程处理数据时，第一个线程将数据添加到字典缓存中，然后当第二个线程完成时，它处理缓存的值.

While the 2nd thread is processing the data the 1st thread adds the data to a dictionary cache then when the 2nd thread is finished it processes the cached values.

我的问题是在 C# 中应该如何处理生产者/消费者代码?

My questions is this how should be doing producer /consumer code in C#?

public delegate void OnValue(ulong value);

public class Runner
{
    public event OnValue OnValueEvent;
    private readonly IDictionary<string, ulong> _cache = new Dictionary<string, ulong>(StringComparer.InvariantCultureIgnoreCase);
    private readonly AutoResetEvent _cachePublisherWaitHandle = new AutoResetEvent(true);

    public void Start()
    {
        for (ulong i = 0; i < 500; i++)
        {
            DataStreamHandler(i.ToString(), i);
        }
    }

    private void DataStreamHandler(string id, ulong value)
    {
        _cache[id] = value;

        if (_cachePublisherWaitHandle.WaitOne(1))
        {
            IList<ulong> tempValues = new List<ulong>(_cache.Values);
            _cache.Clear();

            _cachePublisherWaitHandle.Reset();

            ThreadPool.UnsafeQueueUserWorkItem(delegate
            {
                try
                {
                    foreach (ulong value1 in tempValues)
                        if (OnValueEvent != null)
                            OnValueEvent(value1);
                }
                finally
                {
                    _cachePublisherWaitHandle.Set();
                }
            }, null);
        }
        else
        {
            Console.WriteLine(string.Format("Buffered value: {0}.", value));
        }
    }
}

class Program
{
    static void Main(string[] args)
    {
        Stopwatch sw = Stopwatch.StartNew();
        Runner r = new Runner();
        r.OnValueEvent += delegate(ulong x)
                              {
                                  Console.WriteLine(string.Format("Processed value: {0}.", x));
                                  Thread.Sleep(100);

                                  if(x == 499)
                                  {
                                      sw.Stop();
                                      Console.WriteLine(string.Format("Time: {0}.", sw.ElapsedMilliseconds));
                                  }
                              };
        r.Start();
        Console.WriteLine("Done");
        Console.ReadLine();
    }
}

推荐答案

有一个很好的文章 在 MSDN 上关于同步生产者和消费者.Albahari 网站上也有一个很好的例子.

There is a good article on MSDN about Synchronizing the Producer and Consumer. There is also a good example on the Albahari site.

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