mirror of https://github.com/opensim/opensim.git
smartthreadpool: replace its locked dictionary
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30c479db94
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94d1cf1205
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@ -56,6 +56,8 @@ namespace Amib.Threading
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/// </summary>
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string Name { get; set; }
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int localID { get; set; }
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/// <summary>
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/// Get/Set the maximum number of workitem that execute cocurrency on the thread pool
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/// </summary>
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@ -1,6 +1,7 @@
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using System;
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using Amib.Threading.Internal;
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using System;
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using System.Threading;
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namespace Amib.Threading
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{
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@ -29,19 +30,21 @@ namespace Amib.Threading
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/// With this variable a thread can know whatever it belongs to a
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/// SmartThreadPool.
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/// </summary>
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private readonly SmartThreadPool _associatedSmartThreadPool;
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private SmartThreadPool _associatedSmartThreadPool;
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/// <summary>
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/// A reference to the current work item a thread from the thread pool
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/// is executing.
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/// </summary>
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public WorkItem CurrentWorkItem { get; set; }
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public Thread WorkThread;
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public ThreadEntry(SmartThreadPool stp)
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public ThreadEntry(SmartThreadPool stp, Thread th)
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{
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_associatedSmartThreadPool = stp;
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_creationTime = DateTime.UtcNow;
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_lastAliveTime = DateTime.MinValue;
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WorkThread = th;
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}
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public SmartThreadPool AssociatedSmartThreadPool
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@ -53,6 +56,12 @@ namespace Amib.Threading
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{
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_lastAliveTime = DateTime.UtcNow;
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}
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public void Clean()
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{
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WorkThread = null;
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_associatedSmartThreadPool = null;
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}
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}
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#endregion
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@ -99,6 +99,7 @@ using System;
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using System.Security;
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using System.Threading;
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using System.Collections;
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using System.Collections.Concurrent;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.Runtime.CompilerServices;
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@ -202,7 +203,8 @@ namespace Amib.Threading
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/// <summary>
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/// Dictionary of all the threads in the thread pool.
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/// </summary>
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private readonly SynchronizedDictionary<Thread, ThreadEntry> _workerThreads = new SynchronizedDictionary<Thread, ThreadEntry>();
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private readonly ConcurrentDictionary<int, ThreadEntry> _workerThreads = new ConcurrentDictionary<int, ThreadEntry>();
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private readonly object _workerThreadsLock = new object();
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/// <summary>
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/// Queue of work items.
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@ -271,7 +273,7 @@ namespace Amib.Threading
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/// work item int the SmartThreadPool
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/// This variable is used in case of Shutdown
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/// </summary>
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private readonly SynchronizedDictionary<IWorkItemsGroup, IWorkItemsGroup> _workItemsGroups = new SynchronizedDictionary<IWorkItemsGroup, IWorkItemsGroup>();
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private readonly ConcurrentDictionary<int, IWorkItemsGroup> _workItemsGroups = new ConcurrentDictionary<int, IWorkItemsGroup>();
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/// <summary>
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/// A common object for all the work items int the STP
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@ -434,7 +436,7 @@ namespace Amib.Threading
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private void StartOptimalNumberOfThreads()
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{
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int threadsCount;
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lock (_workerThreads.SyncRoot)
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lock (_workerThreadsLock)
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{
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threadsCount = _workItemsQueue.Count;
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if (threadsCount == _stpStartInfo.MinWorkerThreads)
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@ -553,17 +555,20 @@ namespace Amib.Threading
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}
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private int baseWorkIDs = Environment.TickCount;
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internal void RegisterWorkItemsGroup(IWorkItemsGroup workItemsGroup)
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{
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_workItemsGroups[workItemsGroup] = workItemsGroup;
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int localID = Interlocked.Increment(ref baseWorkIDs);
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while (_workItemsGroups.ContainsKey(localID))
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localID = Interlocked.Increment(ref baseWorkIDs);
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workItemsGroup.localID = localID;
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_workItemsGroups[localID] = workItemsGroup;
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}
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internal void UnregisterWorkItemsGroup(IWorkItemsGroup workItemsGroup)
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{
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if (_workItemsGroups.Contains(workItemsGroup))
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{
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_workItemsGroups.Remove(workItemsGroup);
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}
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_workItemsGroups.TryRemove(workItemsGroup.localID, out IWorkItemsGroup dummy);
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}
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/// <summary>
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@ -575,9 +580,9 @@ namespace Amib.Threading
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// There is no need to lock the two methods together
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// since only the current thread removes itself
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// and the _workerThreads is a synchronized dictionary
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if (_workerThreads.Contains(Thread.CurrentThread))
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if (_workerThreads.TryRemove(Thread.CurrentThread.ManagedThreadId, out ThreadEntry te))
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{
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_workerThreads.Remove(Thread.CurrentThread);
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te.Clean();
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_windowsPCs.SampleThreads(_workerThreads.Count, _inUseWorkerThreads);
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_localPCs.SampleThreads(_workerThreads.Count, _inUseWorkerThreads);
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}
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@ -592,7 +597,7 @@ namespace Amib.Threading
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if (_isSuspended)
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return;
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lock (_workerThreads.SyncRoot)
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lock (_workerThreadsLock)
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{
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// Don't start threads on shut down
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if (_shutdown)
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@ -648,7 +653,7 @@ namespace Amib.Threading
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--threadsCount;
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// Add it to the dictionary and update its creation time.
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_workerThreads[workerThread] = new ThreadEntry(this);
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_workerThreads[workerThread.ManagedThreadId] = new ThreadEntry(this, workerThread);
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_windowsPCs.SampleThreads(_workerThreads.Count, _inUseWorkerThreads);
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_localPCs.SampleThreads(_workerThreads.Count, _inUseWorkerThreads);
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@ -663,7 +668,7 @@ namespace Amib.Threading
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{
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// Keep the entry of the dictionary as thread's variable to avoid the synchronization locks
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// of the dictionary.
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CurrentThreadEntry = _workerThreads[Thread.CurrentThread];
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CurrentThreadEntry = _workerThreads[Thread.CurrentThread.ManagedThreadId];
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bool informedCompleted = false;
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FireOnThreadInitialization();
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@ -682,7 +687,7 @@ namespace Amib.Threading
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// Double lock for quit.
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if (_workerThreads.Count > maxworkers)
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{
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lock (_workerThreads.SyncRoot)
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lock (_workerThreadsLock)
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{
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if (_workerThreads.Count > maxworkers)
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{
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@ -708,7 +713,7 @@ namespace Amib.Threading
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// Double lock for quit.
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if (_workerThreads.Count > minworkers)
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{
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lock (_workerThreads.SyncRoot)
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lock (_workerThreadsLock)
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{
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if (_workerThreads.Count > minworkers)
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{
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@ -914,8 +919,8 @@ namespace Amib.Threading
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pcs.Dispose();
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}
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Thread[] threads;
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lock (_workerThreads.SyncRoot)
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ThreadEntry[] threadEntries;
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lock (_workerThreadsLock)
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{
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// Shutdown the work items queue
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_workItemsQueue.Dispose();
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@ -925,8 +930,9 @@ namespace Amib.Threading
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_shuttingDownEvent.Set();
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// Make a copy of the threads' references in the pool
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threads = new Thread[_workerThreads.Count];
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_workerThreads.Keys.CopyTo(threads, 0);
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threadEntries = new ThreadEntry[_workerThreads.Count];
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_workerThreads.Values.CopyTo(threadEntries, 0);
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_workerThreads.Clear();
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}
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int millisecondsLeft = millisecondsTimeout;
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@ -936,8 +942,10 @@ namespace Amib.Threading
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bool timeout = false;
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// Each iteration we update the time left for the timeout.
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foreach (Thread thread in threads)
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foreach (ThreadEntry te in threadEntries)
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{
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Thread thread = te.WorkThread;
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// Join don't work with negative numbers
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if (!waitInfinitely && (millisecondsLeft < 0))
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{
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@ -959,19 +967,21 @@ namespace Amib.Threading
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//TimeSpan ts = DateTime.UtcNow - start;
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millisecondsLeft = millisecondsTimeout - (int)stopwatch.ElapsedMilliseconds;
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}
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te.WorkThread = null;
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}
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if (timeout && forceAbort)
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{
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// Abort the threads in the pool
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foreach (Thread thread in threads)
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foreach (ThreadEntry te in threadEntries)
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{
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Thread thread = te.WorkThread;
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if ((thread != null) && thread.IsAlive )
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{
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try
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{
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thread.Abort(); // Shutdown
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te.WorkThread = null;
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}
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catch (SecurityException e)
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{
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@ -1184,9 +1194,8 @@ namespace Amib.Threading
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{
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tih();
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}
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catch (Exception e)
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catch
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{
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e.GetHashCode();
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Debug.Assert(false);
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throw;
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}
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@ -1204,9 +1213,8 @@ namespace Amib.Threading
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{
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tth();
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}
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catch (Exception e)
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catch
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{
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e.GetHashCode();
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Debug.Assert(false);
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throw;
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}
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@ -1242,9 +1250,7 @@ namespace Amib.Threading
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foreach (ThreadEntry threadEntry in _workerThreads.Values)
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{
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WorkItem workItem = threadEntry.CurrentWorkItem;
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if (null != workItem &&
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workItem.WasQueuedBy(wig) &&
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!workItem.IsCanceled)
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if (null != workItem && !workItem.IsCanceled && workItem.WasQueuedBy(wig))
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{
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threadEntry.CurrentWorkItem.GetWorkItemResult().Cancel(true);
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}
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@ -1478,8 +1484,7 @@ namespace Amib.Threading
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}
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_isSuspended = false;
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ICollection workItemsGroups = _workItemsGroups.Values;
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foreach (WorkItemsGroup workItemsGroup in workItemsGroups)
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foreach (WorkItemsGroup workItemsGroup in _workItemsGroups.Values)
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{
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workItemsGroup.OnSTPIsStarting();
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}
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@ -1496,8 +1501,7 @@ namespace Amib.Threading
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_canceledSmartThreadPool.IsCanceled = true;
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_canceledSmartThreadPool = new CanceledWorkItemsGroup();
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ICollection workItemsGroups = _workItemsGroups.Values;
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foreach (WorkItemsGroup workItemsGroup in workItemsGroups)
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foreach (WorkItemsGroup workItemsGroup in _workItemsGroups.Values)
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{
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workItemsGroup.Cancel(abortExecution);
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}
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@ -1506,12 +1510,13 @@ namespace Amib.Threading
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{
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foreach (ThreadEntry threadEntry in _workerThreads.Values)
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{
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WorkItem workItem = threadEntry.CurrentWorkItem;
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if (null != workItem &&
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threadEntry.AssociatedSmartThreadPool == this &&
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!workItem.IsCanceled)
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if(threadEntry.AssociatedSmartThreadPool == this)
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{
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threadEntry.CurrentWorkItem.GetWorkItemResult().Cancel(true);
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WorkItem workItem = threadEntry.CurrentWorkItem;
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if (null != workItem && !workItem.IsCanceled)
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{
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threadEntry.CurrentWorkItem.GetWorkItemResult().Cancel(true);
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}
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}
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}
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}
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@ -1,89 +0,0 @@
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using System.Collections.Generic;
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namespace Amib.Threading.Internal
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{
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internal class SynchronizedDictionary<TKey, TValue>
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{
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private readonly Dictionary<TKey, TValue> _dictionary;
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private readonly object _lock;
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public SynchronizedDictionary()
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{
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_lock = new object();
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_dictionary = new Dictionary<TKey, TValue>();
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}
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public int Count
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{
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get { return _dictionary.Count; }
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}
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public bool Contains(TKey key)
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{
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lock (_lock)
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{
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return _dictionary.ContainsKey(key);
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}
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}
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public void Remove(TKey key)
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{
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lock (_lock)
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{
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_dictionary.Remove(key);
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}
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}
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public object SyncRoot
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{
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get { return _lock; }
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}
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public TValue this[TKey key]
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{
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get
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{
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lock (_lock)
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{
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return _dictionary[key];
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}
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}
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set
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{
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lock (_lock)
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{
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_dictionary[key] = value;
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}
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}
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}
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public Dictionary<TKey, TValue>.KeyCollection Keys
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{
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get
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{
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lock (_lock)
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{
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return _dictionary.Keys;
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}
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}
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}
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public Dictionary<TKey, TValue>.ValueCollection Values
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{
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get
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{
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lock (_lock)
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{
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return _dictionary.Values;
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}
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}
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}
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public void Clear()
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{
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lock (_lock)
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{
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_dictionary.Clear();
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}
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}
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}
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}
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@ -426,10 +426,10 @@ namespace Amib.Threading.Internal
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// We must treat the ThreadAbortException or else it will be stored in the exception variable
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catch (ThreadAbortException tae)
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{
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tae.GetHashCode();
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// Check if the work item was cancelled
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// If we got a ThreadAbortException and the STP is not shutting down, it means the
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// work items was cancelled.
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tae.GetHashCode();
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if (!SmartThreadPool.CurrentThreadEntry.AssociatedSmartThreadPool.IsShuttingdown)
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{
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Thread.ResetAbort();
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@ -33,6 +33,7 @@ namespace Amib.Threading.Internal
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set { _name = value; }
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}
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public int localID { get; set;}
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#endregion
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#region Abstract Methods
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