获取.NET中当前活动的托管线程列表？

Question

对于"支持日志信息"类型的函数,我想枚举并转储活动的线程信息.

我很清楚竞争条件可能会使这些信息半不准确,但我想尝试获得最佳结果,即使它不是100%准确.

我查看了Process.Threads,但它返回了ProcessThread对象,我想要一个Thread对象的集合,这样我就可以记录它们的名字,以及它们是否是后台线程.

是否有这样的集合可用,即使它只是我调用它时活动线程的快照？

即.

Thread[] activeThreads = ??

注意,要说清楚,我不是在询问Process.Threads,这个集合给了我很多,但不是我想要的全部.我想知道我们的应用程序当前正在使用多少时间特定的命名线程(这意味着我将不得不考虑稍后连接两种类型的对象,但名称比开始时的CPU时间更重要.)

Answer 1

如果您愿意Thread用另一个包装类替换您的应用程序的创建,则所述包装类可以Thread为您跟踪活动和非活动.这是一个这样的包装器的最小可行shell:

namespace ThreadTracker
{
    using System.Collections.Generic;
    using System.Collections.ObjectModel;
    using System.Threading;

    public class TrackedThread
    {
        private static readonly IList<Thread> threadList = new List<Thread>();

        private readonly Thread thread;

        private readonly ParameterizedThreadStart start1;

        private readonly ThreadStart start2;

        public TrackedThread(ParameterizedThreadStart start)
        {
            this.start1 = start;
            this.thread = new Thread(this.StartThreadParameterized);
            lock (threadList)
            {
                threadList.Add(this.thread);
            }
        }

        public TrackedThread(ThreadStart start)
        {
            this.start2 = start;
            this.thread = new Thread(this.StartThread);
            lock (threadList)
            {
                threadList.Add(this.thread);
            }
        }

        public TrackedThread(ParameterizedThreadStart start, int maxStackSize)
        {
            this.start1 = start;
            this.thread = new Thread(this.StartThreadParameterized, maxStackSize);
            lock (threadList)
            {
                threadList.Add(this.thread);
            }
        }

        public TrackedThread(ThreadStart start, int maxStackSize)
        {
            this.start2 = start;
            this.thread = new Thread(this.StartThread, maxStackSize);
            lock (threadList)
            {
                threadList.Add(this.thread);
            }
        }

        public static int Count
        {
            get
            {
                lock (threadList)
                {
                    return threadList.Count;
                }
            }
        }

        public static IEnumerable<Thread> ThreadList
        {
            get
            {
                lock (threadList)
                {
                    return new ReadOnlyCollection<Thread>(threadList);
                }
            }
        }

        // either: (a) expose the thread object itself via a property or,
        // (b) expose the other Thread public methods you need to replicate.
        // This example uses (a).
        public Thread Thread
        {
            get
            {
                return this.thread;
            }
        }

        private void StartThreadParameterized(object obj)
        {
            try
            {
                this.start1(obj);
            }
            finally
            {
                lock (threadList)
                {
                    threadList.Remove(this.thread);
                }
            }
        }

        private void StartThread()
        {
            try
            {
                this.start2();
            }
            finally
            {
                lock (threadList)
                {
                    threadList.Remove(this.thread);
                }
            }
        }
    }
}

和它的快速测试驱动程序(注意我不迭代线程列表,只是获取列表中的计数):

namespace ThreadTracker
{
    using System;
    using System.Threading;

    internal static class Program
    {
        private static void Main()
        {
            var thread1 = new TrackedThread(DoNothingForFiveSeconds);
            var thread2 = new TrackedThread(DoNothingForTenSeconds);
            var thread3 = new TrackedThread(DoNothingForSomeTime);

            thread1.Thread.Start();
            thread2.Thread.Start();
            thread3.Thread.Start(15);
            while (TrackedThread.Count > 0)
            {
                Console.WriteLine(TrackedThread.Count);
            }

            Console.ReadLine();
        }

        private static void DoNothingForFiveSeconds()
        {
            Thread.Sleep(5000);
        }

        private static void DoNothingForTenSeconds()
        {
            Thread.Sleep(10000);
        }

        private static void DoNothingForSomeTime(object seconds)
        {
            Thread.Sleep(1000 * (int)seconds);
        }
    }
}

不确定你是否可以走这样的路线,但如果你能够在开发的早期阶段进行整合,它将实现目标.