Created
November 26, 2012 21:12
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using System; | |
using System.Collections.Concurrent; | |
using System.Collections.Generic; | |
using System.Linq; | |
using System.Threading; | |
using System.Threading.Tasks; | |
namespace ConsoleApplication5 | |
{ | |
public static class ThreadExtensions | |
{ | |
/// <summary> | |
/// Blocks the current thread for a period of time so that the thread cannot be reused by the threadpool. | |
/// </summary> | |
public static void Block(this Thread thread, int millisecondsTimeout) | |
{ | |
new WakeSleepClass(millisecondsTimeout).SleepThread(); | |
} | |
/// <summary> | |
/// Blocks the current thread so that the thread cannot be reused by the threadpool. | |
/// </summary> | |
public static void Block(this Thread thread) | |
{ | |
new WakeSleepClass().SleepThread(); | |
} | |
/// <summary> | |
/// Blocks the current thread for a period of time so that the thread cannot be reused by the threadpool. | |
/// </summary> | |
public static void Block(this Thread thread, TimeSpan timeout) | |
{ | |
new WakeSleepClass(timeout).SleepThread(); | |
} | |
class WakeSleepClass | |
{ | |
bool locked = true; | |
readonly TimerDisposer timerDisposer = new TimerDisposer(); | |
public WakeSleepClass(int sleepTime) | |
{ | |
var timer = new Timer(WakeThread, timerDisposer, sleepTime, sleepTime); | |
timerDisposer.InternalTimer = timer; | |
} | |
public WakeSleepClass(TimeSpan sleepTime) | |
{ | |
var timer = new Timer(WakeThread, timerDisposer, sleepTime, sleepTime); | |
timerDisposer.InternalTimer = timer; | |
} | |
public WakeSleepClass() | |
{ | |
var timer = new Timer(WakeThread, timerDisposer, Timeout.Infinite, Timeout.Infinite); | |
timerDisposer.InternalTimer = timer; | |
} | |
public void SleepThread() | |
{ | |
while (locked) | |
lock (timerDisposer) Monitor.Wait(timerDisposer); | |
locked = true; | |
} | |
public void WakeThread(object key) | |
{ | |
locked = false; | |
lock (key) Monitor.Pulse(key); | |
((TimerDisposer)key).InternalTimer.Dispose(); | |
} | |
class TimerDisposer | |
{ | |
public Timer InternalTimer { get; set; } | |
} | |
} | |
} | |
class Program | |
{ | |
private static readonly Queue<CancellationTokenSource> tokenSourceQueue = new Queue<CancellationTokenSource>(); | |
static void Main(string[] args) | |
{ | |
CancellationTokenSource tokenSource = new CancellationTokenSource(); | |
tokenSourceQueue.Enqueue(tokenSource); | |
ConcurrentDictionary<int, int> startedThreads = new ConcurrentDictionary<int, int>(); | |
for (int i = 0; i < 10; i++) | |
{ | |
Thread.Sleep(1000); | |
Task.Factory.StartNew(() => | |
{ | |
startedThreads.AddOrUpdate(Thread.CurrentThread.ManagedThreadId, Thread.CurrentThread.ManagedThreadId, (a, b) => b); | |
for (int j = 0; j < 50; j++) | |
Task.Factory.StartNew(() => startedThreads.AddOrUpdate(Thread.CurrentThread.ManagedThreadId, Thread.CurrentThread.ManagedThreadId, (a, b) => b)); | |
for (int j = 0; j < 50; j++) | |
{ | |
Task.Factory.StartNew(() => | |
{ | |
while (!tokenSource.Token.IsCancellationRequested) | |
{ | |
if (startedThreads.ContainsKey(Thread.CurrentThread.ManagedThreadId)) Console.WriteLine("Thread reused"); | |
Thread.CurrentThread.Block(10); | |
if (startedThreads.ContainsKey(Thread.CurrentThread.ManagedThreadId)) Console.WriteLine("Thread reused"); | |
} | |
}, tokenSource.Token, TaskCreationOptions.LongRunning, TaskScheduler.Default) | |
.ContinueWith(task => | |
{ | |
WriteExceptions(task.Exception); | |
Console.WriteLine("-----------------------------"); | |
}, TaskContinuationOptions.OnlyOnFaulted); | |
} | |
Thread.CurrentThread.Block(); | |
}, tokenSource.Token, TaskCreationOptions.LongRunning, TaskScheduler.Default) | |
.ContinueWith(task => | |
{ | |
WriteExceptions(task.Exception); | |
Console.WriteLine("-----------------------------"); | |
}, TaskContinuationOptions.OnlyOnFaulted); | |
} | |
Console.Read(); | |
} | |
private static void WriteExceptions(Exception ex) | |
{ | |
Console.WriteLine(ex.Message); | |
if (ex.InnerException != null) | |
WriteExceptions(ex.InnerException); | |
} | |
} | |
} |
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