aboutsummaryrefslogtreecommitdiffstatshomepage
path: root/ThirdParty/SmartThreadPool/SmartThreadPool.cs
diff options
context:
space:
mode:
Diffstat (limited to 'ThirdParty/SmartThreadPool/SmartThreadPool.cs')
-rw-r--r--ThirdParty/SmartThreadPool/SmartThreadPool.cs3464
1 files changed, 1732 insertions, 1732 deletions
diff --git a/ThirdParty/SmartThreadPool/SmartThreadPool.cs b/ThirdParty/SmartThreadPool/SmartThreadPool.cs
index 9256777..a4f4ce5 100644
--- a/ThirdParty/SmartThreadPool/SmartThreadPool.cs
+++ b/ThirdParty/SmartThreadPool/SmartThreadPool.cs
@@ -1,1732 +1,1732 @@
1#region Release History 1#region Release History
2 2
3// Smart Thread Pool 3// Smart Thread Pool
4// 7 Aug 2004 - Initial release 4// 7 Aug 2004 - Initial release
5// 5//
6// 14 Sep 2004 - Bug fixes 6// 14 Sep 2004 - Bug fixes
7// 7//
8// 15 Oct 2004 - Added new features 8// 15 Oct 2004 - Added new features
9// - Work items return result. 9// - Work items return result.
10// - Support waiting synchronization for multiple work items. 10// - Support waiting synchronization for multiple work items.
11// - Work items can be cancelled. 11// - Work items can be cancelled.
12// - Passage of the caller thread’s context to the thread in the pool. 12// - Passage of the caller thread’s context to the thread in the pool.
13// - Minimal usage of WIN32 handles. 13// - Minimal usage of WIN32 handles.
14// - Minor bug fixes. 14// - Minor bug fixes.
15// 15//
16// 26 Dec 2004 - Changes: 16// 26 Dec 2004 - Changes:
17// - Removed static constructors. 17// - Removed static constructors.
18// - Added finalizers. 18// - Added finalizers.
19// - Changed Exceptions so they are serializable. 19// - Changed Exceptions so they are serializable.
20// - Fixed the bug in one of the SmartThreadPool constructors. 20// - Fixed the bug in one of the SmartThreadPool constructors.
21// - Changed the SmartThreadPool.WaitAll() so it will support any number of waiters. 21// - Changed the SmartThreadPool.WaitAll() so it will support any number of waiters.
22// The SmartThreadPool.WaitAny() is still limited by the .NET Framework. 22// The SmartThreadPool.WaitAny() is still limited by the .NET Framework.
23// - Added PostExecute with options on which cases to call it. 23// - Added PostExecute with options on which cases to call it.
24// - Added option to dispose of the state objects. 24// - Added option to dispose of the state objects.
25// - Added a WaitForIdle() method that waits until the work items queue is empty. 25// - Added a WaitForIdle() method that waits until the work items queue is empty.
26// - Added an STPStartInfo class for the initialization of the thread pool. 26// - Added an STPStartInfo class for the initialization of the thread pool.
27// - Changed exception handling so if a work item throws an exception it 27// - Changed exception handling so if a work item throws an exception it
28// is rethrown at GetResult(), rather then firing an UnhandledException event. 28// is rethrown at GetResult(), rather then firing an UnhandledException event.
29// Note that PostExecute exception are always ignored. 29// Note that PostExecute exception are always ignored.
30// 30//
31// 25 Mar 2005 - Changes: 31// 25 Mar 2005 - Changes:
32// - Fixed lost of work items bug 32// - Fixed lost of work items bug
33// 33//
34// 3 Jul 2005: Changes. 34// 3 Jul 2005: Changes.
35// - Fixed bug where Enqueue() throws an exception because PopWaiter() returned null, hardly reconstructed. 35// - Fixed bug where Enqueue() throws an exception because PopWaiter() returned null, hardly reconstructed.
36// 36//
37// 16 Aug 2005: Changes. 37// 16 Aug 2005: Changes.
38// - Fixed bug where the InUseThreads becomes negative when canceling work items. 38// - Fixed bug where the InUseThreads becomes negative when canceling work items.
39// 39//
40// 31 Jan 2006 - Changes: 40// 31 Jan 2006 - Changes:
41// - Added work items priority 41// - Added work items priority
42// - Removed support of chained delegates in callbacks and post executes (nobody really use this) 42// - Removed support of chained delegates in callbacks and post executes (nobody really use this)
43// - Added work items groups 43// - Added work items groups
44// - Added work items groups idle event 44// - Added work items groups idle event
45// - Changed SmartThreadPool.WaitAll() behavior so when it gets empty array 45// - Changed SmartThreadPool.WaitAll() behavior so when it gets empty array
46// it returns true rather then throwing an exception. 46// it returns true rather then throwing an exception.
47// - Added option to start the STP and the WIG as suspended 47// - Added option to start the STP and the WIG as suspended
48// - Exception behavior changed, the real exception is returned by an 48// - Exception behavior changed, the real exception is returned by an
49// inner exception 49// inner exception
50// - Added option to keep the Http context of the caller thread. (Thanks to Steven T.) 50// - Added option to keep the Http context of the caller thread. (Thanks to Steven T.)
51// - Added performance counters 51// - Added performance counters
52// - Added priority to the threads in the pool 52// - Added priority to the threads in the pool
53// 53//
54// 13 Feb 2006 - Changes: 54// 13 Feb 2006 - Changes:
55// - Added a call to the dispose of the Performance Counter so 55// - Added a call to the dispose of the Performance Counter so
56// their won't be a Performance Counter leak. 56// their won't be a Performance Counter leak.
57// - Added exception catch in case the Performance Counters cannot 57// - Added exception catch in case the Performance Counters cannot
58// be created. 58// be created.
59// 59//
60// 17 May 2008 - Changes: 60// 17 May 2008 - Changes:
61// - Changed the dispose behavior and removed the Finalizers. 61// - Changed the dispose behavior and removed the Finalizers.
62// - Enabled the change of the MaxThreads and MinThreads at run time. 62// - Enabled the change of the MaxThreads and MinThreads at run time.
63// - Enabled the change of the Concurrency of a IWorkItemsGroup at run 63// - Enabled the change of the Concurrency of a IWorkItemsGroup at run
64// time If the IWorkItemsGroup is a SmartThreadPool then the Concurrency 64// time If the IWorkItemsGroup is a SmartThreadPool then the Concurrency
65// refers to the MaxThreads. 65// refers to the MaxThreads.
66// - Improved the cancel behavior. 66// - Improved the cancel behavior.
67// - Added events for thread creation and termination. 67// - Added events for thread creation and termination.
68// - Fixed the HttpContext context capture. 68// - Fixed the HttpContext context capture.
69// - Changed internal collections so they use generic collections 69// - Changed internal collections so they use generic collections
70// - Added IsIdle flag to the SmartThreadPool and IWorkItemsGroup 70// - Added IsIdle flag to the SmartThreadPool and IWorkItemsGroup
71// - Added support for WinCE 71// - Added support for WinCE
72// - Added support for Action<T> and Func<T> 72// - Added support for Action<T> and Func<T>
73// 73//
74// 07 April 2009 - Changes: 74// 07 April 2009 - Changes:
75// - Added support for Silverlight and Mono 75// - Added support for Silverlight and Mono
76// - Added Join, Choice, and Pipe to SmartThreadPool. 76// - Added Join, Choice, and Pipe to SmartThreadPool.
77// - Added local performance counters (for Mono, Silverlight, and WindowsCE) 77// - Added local performance counters (for Mono, Silverlight, and WindowsCE)
78// - Changed duration measures from DateTime.Now to Stopwatch. 78// - Changed duration measures from DateTime.Now to Stopwatch.
79// - Queues changed from System.Collections.Queue to System.Collections.Generic.LinkedList<T>. 79// - Queues changed from System.Collections.Queue to System.Collections.Generic.LinkedList<T>.
80// 80//
81// 21 December 2009 - Changes: 81// 21 December 2009 - Changes:
82// - Added work item timeout (passive) 82// - Added work item timeout (passive)
83// 83//
84// 20 August 2012 - Changes: 84// 20 August 2012 - Changes:
85// - Added set name to threads 85// - Added set name to threads
86// - Fixed the WorkItemsQueue.Dequeue. 86// - Fixed the WorkItemsQueue.Dequeue.
87// Replaced while (!Monitor.TryEnter(this)); with lock(this) { ... } 87// Replaced while (!Monitor.TryEnter(this)); with lock(this) { ... }
88// - Fixed SmartThreadPool.Pipe 88// - Fixed SmartThreadPool.Pipe
89// - Added IsBackground option to threads 89// - Added IsBackground option to threads
90// - Added ApartmentState to threads 90// - Added ApartmentState to threads
91// - Fixed thread creation when queuing many work items at the same time. 91// - Fixed thread creation when queuing many work items at the same time.
92// 92//
93// 24 August 2012 - Changes: 93// 24 August 2012 - Changes:
94// - Enabled cancel abort after cancel. See: http://smartthreadpool.codeplex.com/discussions/345937 by alecswan 94// - Enabled cancel abort after cancel. See: http://smartthreadpool.codeplex.com/discussions/345937 by alecswan
95// - Added option to set MaxStackSize of threads 95// - Added option to set MaxStackSize of threads
96 96
97#endregion 97#endregion
98 98
99using System; 99using System;
100using System.Security; 100using System.Security;
101using System.Threading; 101using System.Threading;
102using System.Collections; 102using System.Collections;
103using System.Collections.Generic; 103using System.Collections.Generic;
104using System.Diagnostics; 104using System.Diagnostics;
105using System.Runtime.CompilerServices; 105using System.Runtime.CompilerServices;
106 106
107using Amib.Threading.Internal; 107using Amib.Threading.Internal;
108 108
109namespace Amib.Threading 109namespace Amib.Threading
110{ 110{
111 #region SmartThreadPool class 111 #region SmartThreadPool class
112 /// <summary> 112 /// <summary>
113 /// Smart thread pool class. 113 /// Smart thread pool class.
114 /// </summary> 114 /// </summary>
115 public partial class SmartThreadPool : WorkItemsGroupBase, IDisposable 115 public partial class SmartThreadPool : WorkItemsGroupBase, IDisposable
116 { 116 {
117 #region Public Default Constants 117 #region Public Default Constants
118 118
119 /// <summary> 119 /// <summary>
120 /// Default minimum number of threads the thread pool contains. (0) 120 /// Default minimum number of threads the thread pool contains. (0)
121 /// </summary> 121 /// </summary>
122 public const int DefaultMinWorkerThreads = 0; 122 public const int DefaultMinWorkerThreads = 0;
123 123
124 /// <summary> 124 /// <summary>
125 /// Default maximum number of threads the thread pool contains. (25) 125 /// Default maximum number of threads the thread pool contains. (25)
126 /// </summary> 126 /// </summary>
127 public const int DefaultMaxWorkerThreads = 25; 127 public const int DefaultMaxWorkerThreads = 25;
128 128
129 /// <summary> 129 /// <summary>
130 /// Default idle timeout in milliseconds. (One minute) 130 /// Default idle timeout in milliseconds. (One minute)
131 /// </summary> 131 /// </summary>
132 public const int DefaultIdleTimeout = 60*1000; // One minute 132 public const int DefaultIdleTimeout = 60*1000; // One minute
133 133
134 /// <summary> 134 /// <summary>
135 /// Indicate to copy the security context of the caller and then use it in the call. (false) 135 /// Indicate to copy the security context of the caller and then use it in the call. (false)
136 /// </summary> 136 /// </summary>
137 public const bool DefaultUseCallerCallContext = false; 137 public const bool DefaultUseCallerCallContext = false;
138 138
139 /// <summary> 139 /// <summary>
140 /// Indicate to copy the HTTP context of the caller and then use it in the call. (false) 140 /// Indicate to copy the HTTP context of the caller and then use it in the call. (false)
141 /// </summary> 141 /// </summary>
142 public const bool DefaultUseCallerHttpContext = false; 142 public const bool DefaultUseCallerHttpContext = false;
143 143
144 /// <summary> 144 /// <summary>
145 /// Indicate to dispose of the state objects if they support the IDispose interface. (false) 145 /// Indicate to dispose of the state objects if they support the IDispose interface. (false)
146 /// </summary> 146 /// </summary>
147 public const bool DefaultDisposeOfStateObjects = false; 147 public const bool DefaultDisposeOfStateObjects = false;
148 148
149 /// <summary> 149 /// <summary>
150 /// The default option to run the post execute (CallToPostExecute.Always) 150 /// The default option to run the post execute (CallToPostExecute.Always)
151 /// </summary> 151 /// </summary>
152 public const CallToPostExecute DefaultCallToPostExecute = CallToPostExecute.Always; 152 public const CallToPostExecute DefaultCallToPostExecute = CallToPostExecute.Always;
153 153
154 /// <summary> 154 /// <summary>
155 /// The default post execute method to run. (None) 155 /// The default post execute method to run. (None)
156 /// When null it means not to call it. 156 /// When null it means not to call it.
157 /// </summary> 157 /// </summary>
158 public static readonly PostExecuteWorkItemCallback DefaultPostExecuteWorkItemCallback; 158 public static readonly PostExecuteWorkItemCallback DefaultPostExecuteWorkItemCallback;
159 159
160 /// <summary> 160 /// <summary>
161 /// The default work item priority (WorkItemPriority.Normal) 161 /// The default work item priority (WorkItemPriority.Normal)
162 /// </summary> 162 /// </summary>
163 public const WorkItemPriority DefaultWorkItemPriority = WorkItemPriority.Normal; 163 public const WorkItemPriority DefaultWorkItemPriority = WorkItemPriority.Normal;
164 164
165 /// <summary> 165 /// <summary>
166 /// The default is to work on work items as soon as they arrive 166 /// The default is to work on work items as soon as they arrive
167 /// and not to wait for the start. (false) 167 /// and not to wait for the start. (false)
168 /// </summary> 168 /// </summary>
169 public const bool DefaultStartSuspended = false; 169 public const bool DefaultStartSuspended = false;
170 170
171 /// <summary> 171 /// <summary>
172 /// The default name to use for the performance counters instance. (null) 172 /// The default name to use for the performance counters instance. (null)
173 /// </summary> 173 /// </summary>
174 public static readonly string DefaultPerformanceCounterInstanceName; 174 public static readonly string DefaultPerformanceCounterInstanceName;
175 175
176#if !(WINDOWS_PHONE) 176#if !(WINDOWS_PHONE)
177 177
178 /// <summary> 178 /// <summary>
179 /// The default thread priority (ThreadPriority.Normal) 179 /// The default thread priority (ThreadPriority.Normal)
180 /// </summary> 180 /// </summary>
181 public const ThreadPriority DefaultThreadPriority = ThreadPriority.Normal; 181 public const ThreadPriority DefaultThreadPriority = ThreadPriority.Normal;
182#endif 182#endif
183 /// <summary> 183 /// <summary>
184 /// The default thread pool name. (SmartThreadPool) 184 /// The default thread pool name. (SmartThreadPool)
185 /// </summary> 185 /// </summary>
186 public const string DefaultThreadPoolName = "SmartThreadPool"; 186 public const string DefaultThreadPoolName = "SmartThreadPool";
187 187
188 /// <summary> 188 /// <summary>
189 /// The default Max Stack Size. (SmartThreadPool) 189 /// The default Max Stack Size. (SmartThreadPool)
190 /// </summary> 190 /// </summary>
191 public static readonly int? DefaultMaxStackSize = null; 191 public static readonly int? DefaultMaxStackSize = null;
192 192
193 /// <summary> 193 /// <summary>
194 /// The default fill state with params. (false) 194 /// The default fill state with params. (false)
195 /// It is relevant only to QueueWorkItem of Action&lt;...&gt;/Func&lt;...&gt; 195 /// It is relevant only to QueueWorkItem of Action&lt;...&gt;/Func&lt;...&gt;
196 /// </summary> 196 /// </summary>
197 public const bool DefaultFillStateWithArgs = false; 197 public const bool DefaultFillStateWithArgs = false;
198 198
199 /// <summary> 199 /// <summary>
200 /// The default thread backgroundness. (true) 200 /// The default thread backgroundness. (true)
201 /// </summary> 201 /// </summary>
202 public const bool DefaultAreThreadsBackground = true; 202 public const bool DefaultAreThreadsBackground = true;
203 203
204#if !(_SILVERLIGHT) && !(WINDOWS_PHONE) 204#if !(_SILVERLIGHT) && !(WINDOWS_PHONE)
205 /// <summary> 205 /// <summary>
206 /// The default apartment state of a thread in the thread pool. 206 /// The default apartment state of a thread in the thread pool.
207 /// The default is ApartmentState.Unknown which means the STP will not 207 /// The default is ApartmentState.Unknown which means the STP will not
208 /// set the apartment of the thread. It will use the .NET default. 208 /// set the apartment of the thread. It will use the .NET default.
209 /// </summary> 209 /// </summary>
210 public const ApartmentState DefaultApartmentState = ApartmentState.Unknown; 210 public const ApartmentState DefaultApartmentState = ApartmentState.Unknown;
211#endif 211#endif
212 212
213 #endregion 213 #endregion
214 214
215 #region Member Variables 215 #region Member Variables
216 216
217 /// <summary> 217 /// <summary>
218 /// Dictionary of all the threads in the thread pool. 218 /// Dictionary of all the threads in the thread pool.
219 /// </summary> 219 /// </summary>
220 private readonly SynchronizedDictionary<Thread, ThreadEntry> _workerThreads = new SynchronizedDictionary<Thread, ThreadEntry>(); 220 private readonly SynchronizedDictionary<Thread, ThreadEntry> _workerThreads = new SynchronizedDictionary<Thread, ThreadEntry>();
221 221
222 /// <summary> 222 /// <summary>
223 /// Queue of work items. 223 /// Queue of work items.
224 /// </summary> 224 /// </summary>
225 private readonly WorkItemsQueue _workItemsQueue = new WorkItemsQueue(); 225 private readonly WorkItemsQueue _workItemsQueue = new WorkItemsQueue();
226 226
227 /// <summary> 227 /// <summary>
228 /// Count the work items handled. 228 /// Count the work items handled.
229 /// Used by the performance counter. 229 /// Used by the performance counter.
230 /// </summary> 230 /// </summary>
231 private int _workItemsProcessed; 231 private int _workItemsProcessed;
232 232
233 /// <summary> 233 /// <summary>
234 /// Number of threads that currently work (not idle). 234 /// Number of threads that currently work (not idle).
235 /// </summary> 235 /// </summary>
236 private int _inUseWorkerThreads; 236 private int _inUseWorkerThreads;
237 237
238 /// <summary> 238 /// <summary>
239 /// Stores a copy of the original STPStartInfo. 239 /// Stores a copy of the original STPStartInfo.
240 /// It is used to change the MinThread and MaxThreads 240 /// It is used to change the MinThread and MaxThreads
241 /// </summary> 241 /// </summary>
242 private STPStartInfo _stpStartInfo; 242 private STPStartInfo _stpStartInfo;
243 243
244 /// <summary> 244 /// <summary>
245 /// Total number of work items that are stored in the work items queue 245 /// Total number of work items that are stored in the work items queue
246 /// plus the work items that the threads in the pool are working on. 246 /// plus the work items that the threads in the pool are working on.
247 /// </summary> 247 /// </summary>
248 private int _currentWorkItemsCount; 248 private int _currentWorkItemsCount;
249 249
250 /// <summary> 250 /// <summary>
251 /// Signaled when the thread pool is idle, i.e. no thread is busy 251 /// Signaled when the thread pool is idle, i.e. no thread is busy
252 /// and the work items queue is empty 252 /// and the work items queue is empty
253 /// </summary> 253 /// </summary>
254 //private ManualResetEvent _isIdleWaitHandle = new ManualResetEvent(true); 254 //private ManualResetEvent _isIdleWaitHandle = new ManualResetEvent(true);
255 private ManualResetEvent _isIdleWaitHandle = EventWaitHandleFactory.CreateManualResetEvent(true); 255 private ManualResetEvent _isIdleWaitHandle = EventWaitHandleFactory.CreateManualResetEvent(true);
256 256
257 /// <summary> 257 /// <summary>
258 /// An event to signal all the threads to quit immediately. 258 /// An event to signal all the threads to quit immediately.
259 /// </summary> 259 /// </summary>
260 //private ManualResetEvent _shuttingDownEvent = new ManualResetEvent(false); 260 //private ManualResetEvent _shuttingDownEvent = new ManualResetEvent(false);
261 private ManualResetEvent _shuttingDownEvent = EventWaitHandleFactory.CreateManualResetEvent(false); 261 private ManualResetEvent _shuttingDownEvent = EventWaitHandleFactory.CreateManualResetEvent(false);
262 262
263 /// <summary> 263 /// <summary>
264 /// A flag to indicate if the Smart Thread Pool is now suspended. 264 /// A flag to indicate if the Smart Thread Pool is now suspended.
265 /// </summary> 265 /// </summary>
266 private bool _isSuspended; 266 private bool _isSuspended;
267 267
268 /// <summary> 268 /// <summary>
269 /// A flag to indicate the threads to quit. 269 /// A flag to indicate the threads to quit.
270 /// </summary> 270 /// </summary>
271 private bool _shutdown; 271 private bool _shutdown;
272 272
273 /// <summary> 273 /// <summary>
274 /// Counts the threads created in the pool. 274 /// Counts the threads created in the pool.
275 /// It is used to name the threads. 275 /// It is used to name the threads.
276 /// </summary> 276 /// </summary>
277 private int _threadCounter; 277 private int _threadCounter;
278 278
279 /// <summary> 279 /// <summary>
280 /// Indicate that the SmartThreadPool has been disposed 280 /// Indicate that the SmartThreadPool has been disposed
281 /// </summary> 281 /// </summary>
282 private bool _isDisposed; 282 private bool _isDisposed;
283 283
284 /// <summary> 284 /// <summary>
285 /// Holds all the WorkItemsGroup instaces that have at least one 285 /// Holds all the WorkItemsGroup instaces that have at least one
286 /// work item int the SmartThreadPool 286 /// work item int the SmartThreadPool
287 /// This variable is used in case of Shutdown 287 /// This variable is used in case of Shutdown
288 /// </summary> 288 /// </summary>
289 private readonly SynchronizedDictionary<IWorkItemsGroup, IWorkItemsGroup> _workItemsGroups = new SynchronizedDictionary<IWorkItemsGroup, IWorkItemsGroup>(); 289 private readonly SynchronizedDictionary<IWorkItemsGroup, IWorkItemsGroup> _workItemsGroups = new SynchronizedDictionary<IWorkItemsGroup, IWorkItemsGroup>();
290 290
291 /// <summary> 291 /// <summary>
292 /// A common object for all the work items int the STP 292 /// A common object for all the work items int the STP
293 /// so we can mark them to cancel in O(1) 293 /// so we can mark them to cancel in O(1)
294 /// </summary> 294 /// </summary>
295 private CanceledWorkItemsGroup _canceledSmartThreadPool = new CanceledWorkItemsGroup(); 295 private CanceledWorkItemsGroup _canceledSmartThreadPool = new CanceledWorkItemsGroup();
296 296
297 /// <summary> 297 /// <summary>
298 /// Windows STP performance counters 298 /// Windows STP performance counters
299 /// </summary> 299 /// </summary>
300 private ISTPInstancePerformanceCounters _windowsPCs = NullSTPInstancePerformanceCounters.Instance; 300 private ISTPInstancePerformanceCounters _windowsPCs = NullSTPInstancePerformanceCounters.Instance;
301 301
302 /// <summary> 302 /// <summary>
303 /// Local STP performance counters 303 /// Local STP performance counters
304 /// </summary> 304 /// </summary>
305 private ISTPInstancePerformanceCounters _localPCs = NullSTPInstancePerformanceCounters.Instance; 305 private ISTPInstancePerformanceCounters _localPCs = NullSTPInstancePerformanceCounters.Instance;
306 306
307 307
308#if (WINDOWS_PHONE) 308#if (WINDOWS_PHONE)
309 private static readonly Dictionary<int, ThreadEntry> _threadEntries = new Dictionary<int, ThreadEntry>(); 309 private static readonly Dictionary<int, ThreadEntry> _threadEntries = new Dictionary<int, ThreadEntry>();
310#elif (_WINDOWS_CE) 310#elif (_WINDOWS_CE)
311 private static LocalDataStoreSlot _threadEntrySlot = Thread.AllocateDataSlot(); 311 private static LocalDataStoreSlot _threadEntrySlot = Thread.AllocateDataSlot();
312#else 312#else
313 [ThreadStatic] 313 [ThreadStatic]
314 private static ThreadEntry _threadEntry; 314 private static ThreadEntry _threadEntry;
315 315
316#endif 316#endif
317 317
318 /// <summary> 318 /// <summary>
319 /// An event to call after a thread is created, but before 319 /// An event to call after a thread is created, but before
320 /// it's first use. 320 /// it's first use.
321 /// </summary> 321 /// </summary>
322 private event ThreadInitializationHandler _onThreadInitialization; 322 private event ThreadInitializationHandler _onThreadInitialization;
323 323
324 /// <summary> 324 /// <summary>
325 /// An event to call when a thread is about to exit, after 325 /// An event to call when a thread is about to exit, after
326 /// it is no longer belong to the pool. 326 /// it is no longer belong to the pool.
327 /// </summary> 327 /// </summary>
328 private event ThreadTerminationHandler _onThreadTermination; 328 private event ThreadTerminationHandler _onThreadTermination;
329 329
330 #endregion 330 #endregion
331 331
332 #region Per thread properties 332 #region Per thread properties
333 333
334 /// <summary> 334 /// <summary>
335 /// A reference to the current work item a thread from the thread pool 335 /// A reference to the current work item a thread from the thread pool
336 /// is executing. 336 /// is executing.
337 /// </summary> 337 /// </summary>
338 internal static ThreadEntry CurrentThreadEntry 338 internal static ThreadEntry CurrentThreadEntry
339 { 339 {
340#if (WINDOWS_PHONE) 340#if (WINDOWS_PHONE)
341 get 341 get
342 { 342 {
343 lock(_threadEntries) 343 lock(_threadEntries)
344 { 344 {
345 ThreadEntry threadEntry; 345 ThreadEntry threadEntry;
346 if (_threadEntries.TryGetValue(Thread.CurrentThread.ManagedThreadId, out threadEntry)) 346 if (_threadEntries.TryGetValue(Thread.CurrentThread.ManagedThreadId, out threadEntry))
347 { 347 {
348 return threadEntry; 348 return threadEntry;
349 } 349 }
350 } 350 }
351 return null; 351 return null;
352 } 352 }
353 set 353 set
354 { 354 {
355 lock(_threadEntries) 355 lock(_threadEntries)
356 { 356 {
357 _threadEntries[Thread.CurrentThread.ManagedThreadId] = value; 357 _threadEntries[Thread.CurrentThread.ManagedThreadId] = value;
358 } 358 }
359 } 359 }
360#elif (_WINDOWS_CE) 360#elif (_WINDOWS_CE)
361 get 361 get
362 { 362 {
363 //Thread.CurrentThread.ManagedThreadId 363 //Thread.CurrentThread.ManagedThreadId
364 return Thread.GetData(_threadEntrySlot) as ThreadEntry; 364 return Thread.GetData(_threadEntrySlot) as ThreadEntry;
365 } 365 }
366 set 366 set
367 { 367 {
368 Thread.SetData(_threadEntrySlot, value); 368 Thread.SetData(_threadEntrySlot, value);
369 } 369 }
370#else 370#else
371 get 371 get
372 { 372 {
373 return _threadEntry; 373 return _threadEntry;
374 } 374 }
375 set 375 set
376 { 376 {
377 _threadEntry = value; 377 _threadEntry = value;
378 } 378 }
379#endif 379#endif
380 } 380 }
381 #endregion 381 #endregion
382 382
383 #region Construction and Finalization 383 #region Construction and Finalization
384 384
385 /// <summary> 385 /// <summary>
386 /// Constructor 386 /// Constructor
387 /// </summary> 387 /// </summary>
388 public SmartThreadPool() 388 public SmartThreadPool()
389 { 389 {
390 _stpStartInfo = new STPStartInfo(); 390 _stpStartInfo = new STPStartInfo();
391 Initialize(); 391 Initialize();
392 } 392 }
393 393
394 /// <summary> 394 /// <summary>
395 /// Constructor 395 /// Constructor
396 /// </summary> 396 /// </summary>
397 /// <param name="idleTimeout">Idle timeout in milliseconds</param> 397 /// <param name="idleTimeout">Idle timeout in milliseconds</param>
398 public SmartThreadPool(int idleTimeout) 398 public SmartThreadPool(int idleTimeout)
399 { 399 {
400 _stpStartInfo = new STPStartInfo 400 _stpStartInfo = new STPStartInfo
401 { 401 {
402 IdleTimeout = idleTimeout, 402 IdleTimeout = idleTimeout,
403 }; 403 };
404 Initialize(); 404 Initialize();
405 } 405 }
406 406
407 /// <summary> 407 /// <summary>
408 /// Constructor 408 /// Constructor
409 /// </summary> 409 /// </summary>
410 /// <param name="idleTimeout">Idle timeout in milliseconds</param> 410 /// <param name="idleTimeout">Idle timeout in milliseconds</param>
411 /// <param name="maxWorkerThreads">Upper limit of threads in the pool</param> 411 /// <param name="maxWorkerThreads">Upper limit of threads in the pool</param>
412 public SmartThreadPool( 412 public SmartThreadPool(
413 int idleTimeout, 413 int idleTimeout,
414 int maxWorkerThreads) 414 int maxWorkerThreads)
415 { 415 {
416 _stpStartInfo = new STPStartInfo 416 _stpStartInfo = new STPStartInfo
417 { 417 {
418 IdleTimeout = idleTimeout, 418 IdleTimeout = idleTimeout,
419 MaxWorkerThreads = maxWorkerThreads, 419 MaxWorkerThreads = maxWorkerThreads,
420 }; 420 };
421 Initialize(); 421 Initialize();
422 } 422 }
423 423
424 /// <summary> 424 /// <summary>
425 /// Constructor 425 /// Constructor
426 /// </summary> 426 /// </summary>
427 /// <param name="idleTimeout">Idle timeout in milliseconds</param> 427 /// <param name="idleTimeout">Idle timeout in milliseconds</param>
428 /// <param name="maxWorkerThreads">Upper limit of threads in the pool</param> 428 /// <param name="maxWorkerThreads">Upper limit of threads in the pool</param>
429 /// <param name="minWorkerThreads">Lower limit of threads in the pool</param> 429 /// <param name="minWorkerThreads">Lower limit of threads in the pool</param>
430 public SmartThreadPool( 430 public SmartThreadPool(
431 int idleTimeout, 431 int idleTimeout,
432 int maxWorkerThreads, 432 int maxWorkerThreads,
433 int minWorkerThreads) 433 int minWorkerThreads)
434 { 434 {
435 _stpStartInfo = new STPStartInfo 435 _stpStartInfo = new STPStartInfo
436 { 436 {
437 IdleTimeout = idleTimeout, 437 IdleTimeout = idleTimeout,
438 MaxWorkerThreads = maxWorkerThreads, 438 MaxWorkerThreads = maxWorkerThreads,
439 MinWorkerThreads = minWorkerThreads, 439 MinWorkerThreads = minWorkerThreads,
440 }; 440 };
441 Initialize(); 441 Initialize();
442 } 442 }
443 443
444 /// <summary> 444 /// <summary>
445 /// Constructor 445 /// Constructor
446 /// </summary> 446 /// </summary>
447 /// <param name="stpStartInfo">A SmartThreadPool configuration that overrides the default behavior</param> 447 /// <param name="stpStartInfo">A SmartThreadPool configuration that overrides the default behavior</param>
448 public SmartThreadPool(STPStartInfo stpStartInfo) 448 public SmartThreadPool(STPStartInfo stpStartInfo)
449 { 449 {
450 _stpStartInfo = new STPStartInfo(stpStartInfo); 450 _stpStartInfo = new STPStartInfo(stpStartInfo);
451 Initialize(); 451 Initialize();
452 } 452 }
453 453
454 private void Initialize() 454 private void Initialize()
455 { 455 {
456 Name = _stpStartInfo.ThreadPoolName; 456 Name = _stpStartInfo.ThreadPoolName;
457 ValidateSTPStartInfo(); 457 ValidateSTPStartInfo();
458 458
459 // _stpStartInfoRW stores a read/write copy of the STPStartInfo. 459 // _stpStartInfoRW stores a read/write copy of the STPStartInfo.
460 // Actually only MaxWorkerThreads and MinWorkerThreads are overwritten 460 // Actually only MaxWorkerThreads and MinWorkerThreads are overwritten
461 461
462 _isSuspended = _stpStartInfo.StartSuspended; 462 _isSuspended = _stpStartInfo.StartSuspended;
463 463
464#if (_WINDOWS_CE) || (_SILVERLIGHT) || (_MONO) || (WINDOWS_PHONE) 464#if (_WINDOWS_CE) || (_SILVERLIGHT) || (_MONO) || (WINDOWS_PHONE)
465 if (null != _stpStartInfo.PerformanceCounterInstanceName) 465 if (null != _stpStartInfo.PerformanceCounterInstanceName)
466 { 466 {
467 throw new NotSupportedException("Performance counters are not implemented for Compact Framework/Silverlight/Mono, instead use StpStartInfo.EnableLocalPerformanceCounters"); 467 throw new NotSupportedException("Performance counters are not implemented for Compact Framework/Silverlight/Mono, instead use StpStartInfo.EnableLocalPerformanceCounters");
468 } 468 }
469#else 469#else
470 if (null != _stpStartInfo.PerformanceCounterInstanceName) 470 if (null != _stpStartInfo.PerformanceCounterInstanceName)
471 { 471 {
472 try 472 try
473 { 473 {
474 _windowsPCs = new STPInstancePerformanceCounters(_stpStartInfo.PerformanceCounterInstanceName); 474 _windowsPCs = new STPInstancePerformanceCounters(_stpStartInfo.PerformanceCounterInstanceName);
475 } 475 }
476 catch (Exception e) 476 catch (Exception e)
477 { 477 {
478 Debug.WriteLine("Unable to create Performance Counters: " + e); 478 Debug.WriteLine("Unable to create Performance Counters: " + e);
479 _windowsPCs = NullSTPInstancePerformanceCounters.Instance; 479 _windowsPCs = NullSTPInstancePerformanceCounters.Instance;
480 } 480 }
481 } 481 }
482#endif 482#endif
483 483
484 if (_stpStartInfo.EnableLocalPerformanceCounters) 484 if (_stpStartInfo.EnableLocalPerformanceCounters)
485 { 485 {
486 _localPCs = new LocalSTPInstancePerformanceCounters(); 486 _localPCs = new LocalSTPInstancePerformanceCounters();
487 } 487 }
488 488
489 // If the STP is not started suspended then start the threads. 489 // If the STP is not started suspended then start the threads.
490 if (!_isSuspended) 490 if (!_isSuspended)
491 { 491 {
492 StartOptimalNumberOfThreads(); 492 StartOptimalNumberOfThreads();
493 } 493 }
494 } 494 }
495 495
496 private void StartOptimalNumberOfThreads() 496 private void StartOptimalNumberOfThreads()
497 { 497 {
498 int threadsCount = Math.Max(_workItemsQueue.Count, _stpStartInfo.MinWorkerThreads); 498 int threadsCount = Math.Max(_workItemsQueue.Count, _stpStartInfo.MinWorkerThreads);
499 threadsCount = Math.Min(threadsCount, _stpStartInfo.MaxWorkerThreads); 499 threadsCount = Math.Min(threadsCount, _stpStartInfo.MaxWorkerThreads);
500 threadsCount -= _workerThreads.Count; 500 threadsCount -= _workerThreads.Count;
501 if (threadsCount > 0) 501 if (threadsCount > 0)
502 { 502 {
503 StartThreads(threadsCount); 503 StartThreads(threadsCount);
504 } 504 }
505 } 505 }
506 506
507 private void ValidateSTPStartInfo() 507 private void ValidateSTPStartInfo()
508 { 508 {
509 if (_stpStartInfo.MinWorkerThreads < 0) 509 if (_stpStartInfo.MinWorkerThreads < 0)
510 { 510 {
511 throw new ArgumentOutOfRangeException( 511 throw new ArgumentOutOfRangeException(
512 "MinWorkerThreads", "MinWorkerThreads cannot be negative"); 512 "MinWorkerThreads", "MinWorkerThreads cannot be negative");
513 } 513 }
514 514
515 if (_stpStartInfo.MaxWorkerThreads <= 0) 515 if (_stpStartInfo.MaxWorkerThreads <= 0)
516 { 516 {
517 throw new ArgumentOutOfRangeException( 517 throw new ArgumentOutOfRangeException(
518 "MaxWorkerThreads", "MaxWorkerThreads must be greater than zero"); 518 "MaxWorkerThreads", "MaxWorkerThreads must be greater than zero");
519 } 519 }
520 520
521 if (_stpStartInfo.MinWorkerThreads > _stpStartInfo.MaxWorkerThreads) 521 if (_stpStartInfo.MinWorkerThreads > _stpStartInfo.MaxWorkerThreads)
522 { 522 {
523 throw new ArgumentOutOfRangeException( 523 throw new ArgumentOutOfRangeException(
524 "MinWorkerThreads, maxWorkerThreads", 524 "MinWorkerThreads, maxWorkerThreads",
525 "MaxWorkerThreads must be greater or equal to MinWorkerThreads"); 525 "MaxWorkerThreads must be greater or equal to MinWorkerThreads");
526 } 526 }
527 } 527 }
528 528
529 private static void ValidateCallback(Delegate callback) 529 private static void ValidateCallback(Delegate callback)
530 { 530 {
531 if(callback.GetInvocationList().Length > 1) 531 if(callback.GetInvocationList().Length > 1)
532 { 532 {
533 throw new NotSupportedException("SmartThreadPool doesn't support delegates chains"); 533 throw new NotSupportedException("SmartThreadPool doesn't support delegates chains");
534 } 534 }
535 } 535 }
536 536
537 #endregion 537 #endregion
538 538
539 #region Thread Processing 539 #region Thread Processing
540 540
541 /// <summary> 541 /// <summary>
542 /// Waits on the queue for a work item, shutdown, or timeout. 542 /// Waits on the queue for a work item, shutdown, or timeout.
543 /// </summary> 543 /// </summary>
544 /// <returns> 544 /// <returns>
545 /// Returns the WaitingCallback or null in case of timeout or shutdown. 545 /// Returns the WaitingCallback or null in case of timeout or shutdown.
546 /// </returns> 546 /// </returns>
547 private WorkItem Dequeue() 547 private WorkItem Dequeue()
548 { 548 {
549 WorkItem workItem = 549 WorkItem workItem =
550 _workItemsQueue.DequeueWorkItem(_stpStartInfo.IdleTimeout, _shuttingDownEvent); 550 _workItemsQueue.DequeueWorkItem(_stpStartInfo.IdleTimeout, _shuttingDownEvent);
551 551
552 return workItem; 552 return workItem;
553 } 553 }
554 554
555 /// <summary> 555 /// <summary>
556 /// Put a new work item in the queue 556 /// Put a new work item in the queue
557 /// </summary> 557 /// </summary>
558 /// <param name="workItem">A work item to queue</param> 558 /// <param name="workItem">A work item to queue</param>
559 internal override void Enqueue(WorkItem workItem) 559 internal override void Enqueue(WorkItem workItem)
560 { 560 {
561 // Make sure the workItem is not null 561 // Make sure the workItem is not null
562 Debug.Assert(null != workItem); 562 Debug.Assert(null != workItem);
563 563
564 IncrementWorkItemsCount(); 564 IncrementWorkItemsCount();
565 565
566 workItem.CanceledSmartThreadPool = _canceledSmartThreadPool; 566 workItem.CanceledSmartThreadPool = _canceledSmartThreadPool;
567 _workItemsQueue.EnqueueWorkItem(workItem); 567 _workItemsQueue.EnqueueWorkItem(workItem);
568 workItem.WorkItemIsQueued(); 568 workItem.WorkItemIsQueued();
569 569
570 // If all the threads are busy then try to create a new one 570 // If all the threads are busy then try to create a new one
571 if (_currentWorkItemsCount > _workerThreads.Count) 571 if (_currentWorkItemsCount > _workerThreads.Count)
572 { 572 {
573 StartThreads(1); 573 StartThreads(1);
574 } 574 }
575 } 575 }
576 576
577 private void IncrementWorkItemsCount() 577 private void IncrementWorkItemsCount()
578 { 578 {
579 _windowsPCs.SampleWorkItems(_workItemsQueue.Count, _workItemsProcessed); 579 _windowsPCs.SampleWorkItems(_workItemsQueue.Count, _workItemsProcessed);
580 _localPCs.SampleWorkItems(_workItemsQueue.Count, _workItemsProcessed); 580 _localPCs.SampleWorkItems(_workItemsQueue.Count, _workItemsProcessed);
581 581
582 int count = Interlocked.Increment(ref _currentWorkItemsCount); 582 int count = Interlocked.Increment(ref _currentWorkItemsCount);
583 //Trace.WriteLine("WorkItemsCount = " + _currentWorkItemsCount.ToString()); 583 //Trace.WriteLine("WorkItemsCount = " + _currentWorkItemsCount.ToString());
584 if (count == 1) 584 if (count == 1)
585 { 585 {
586 IsIdle = false; 586 IsIdle = false;
587 _isIdleWaitHandle.Reset(); 587 _isIdleWaitHandle.Reset();
588 } 588 }
589 } 589 }
590 590
591 private void DecrementWorkItemsCount() 591 private void DecrementWorkItemsCount()
592 { 592 {
593 int count = Interlocked.Decrement(ref _currentWorkItemsCount); 593 int count = Interlocked.Decrement(ref _currentWorkItemsCount);
594 //Trace.WriteLine("WorkItemsCount = " + _currentWorkItemsCount.ToString()); 594 //Trace.WriteLine("WorkItemsCount = " + _currentWorkItemsCount.ToString());
595 if (count == 0) 595 if (count == 0)
596 { 596 {
597 IsIdle = true; 597 IsIdle = true;
598 _isIdleWaitHandle.Set(); 598 _isIdleWaitHandle.Set();
599 } 599 }
600 600
601 Interlocked.Increment(ref _workItemsProcessed); 601 Interlocked.Increment(ref _workItemsProcessed);
602 602
603 if (!_shutdown) 603 if (!_shutdown)
604 { 604 {
605 // The counter counts even if the work item was cancelled 605 // The counter counts even if the work item was cancelled
606 _windowsPCs.SampleWorkItems(_workItemsQueue.Count, _workItemsProcessed); 606 _windowsPCs.SampleWorkItems(_workItemsQueue.Count, _workItemsProcessed);
607 _localPCs.SampleWorkItems(_workItemsQueue.Count, _workItemsProcessed); 607 _localPCs.SampleWorkItems(_workItemsQueue.Count, _workItemsProcessed);
608 } 608 }
609 609
610 } 610 }
611 611
612 internal void RegisterWorkItemsGroup(IWorkItemsGroup workItemsGroup) 612 internal void RegisterWorkItemsGroup(IWorkItemsGroup workItemsGroup)
613 { 613 {
614 _workItemsGroups[workItemsGroup] = workItemsGroup; 614 _workItemsGroups[workItemsGroup] = workItemsGroup;
615 } 615 }
616 616
617 internal void UnregisterWorkItemsGroup(IWorkItemsGroup workItemsGroup) 617 internal void UnregisterWorkItemsGroup(IWorkItemsGroup workItemsGroup)
618 { 618 {
619 if (_workItemsGroups.Contains(workItemsGroup)) 619 if (_workItemsGroups.Contains(workItemsGroup))
620 { 620 {
621 _workItemsGroups.Remove(workItemsGroup); 621 _workItemsGroups.Remove(workItemsGroup);
622 } 622 }
623 } 623 }
624 624
625 /// <summary> 625 /// <summary>
626 /// Inform that the current thread is about to quit or quiting. 626 /// Inform that the current thread is about to quit or quiting.
627 /// The same thread may call this method more than once. 627 /// The same thread may call this method more than once.
628 /// </summary> 628 /// </summary>
629 private void InformCompleted() 629 private void InformCompleted()
630 { 630 {
631 // There is no need to lock the two methods together 631 // There is no need to lock the two methods together
632 // since only the current thread removes itself 632 // since only the current thread removes itself
633 // and the _workerThreads is a synchronized dictionary 633 // and the _workerThreads is a synchronized dictionary
634 if (_workerThreads.Contains(Thread.CurrentThread)) 634 if (_workerThreads.Contains(Thread.CurrentThread))
635 { 635 {
636 _workerThreads.Remove(Thread.CurrentThread); 636 _workerThreads.Remove(Thread.CurrentThread);
637 _windowsPCs.SampleThreads(_workerThreads.Count, _inUseWorkerThreads); 637 _windowsPCs.SampleThreads(_workerThreads.Count, _inUseWorkerThreads);
638 _localPCs.SampleThreads(_workerThreads.Count, _inUseWorkerThreads); 638 _localPCs.SampleThreads(_workerThreads.Count, _inUseWorkerThreads);
639 } 639 }
640 } 640 }
641 641
642 /// <summary> 642 /// <summary>
643 /// Starts new threads 643 /// Starts new threads
644 /// </summary> 644 /// </summary>
645 /// <param name="threadsCount">The number of threads to start</param> 645 /// <param name="threadsCount">The number of threads to start</param>
646 private void StartThreads(int threadsCount) 646 private void StartThreads(int threadsCount)
647 { 647 {
648 if (_isSuspended) 648 if (_isSuspended)
649 { 649 {
650 return; 650 return;
651 } 651 }
652 652
653 lock(_workerThreads.SyncRoot) 653 lock(_workerThreads.SyncRoot)
654 { 654 {
655 // Don't start threads on shut down 655 // Don't start threads on shut down
656 if (_shutdown) 656 if (_shutdown)
657 { 657 {
658 return; 658 return;
659 } 659 }
660 660
661 for(int i = 0; i < threadsCount; ++i) 661 for(int i = 0; i < threadsCount; ++i)
662 { 662 {
663 // Don't create more threads then the upper limit 663 // Don't create more threads then the upper limit
664 if (_workerThreads.Count >= _stpStartInfo.MaxWorkerThreads) 664 if (_workerThreads.Count >= _stpStartInfo.MaxWorkerThreads)
665 { 665 {
666 return; 666 return;
667 } 667 }
668 668
669 // Create a new thread 669 // Create a new thread
670 670
671#if (_SILVERLIGHT) || (WINDOWS_PHONE) 671#if (_SILVERLIGHT) || (WINDOWS_PHONE)
672 Thread workerThread = new Thread(ProcessQueuedItems); 672 Thread workerThread = new Thread(ProcessQueuedItems);
673#else 673#else
674 Thread workerThread = 674 Thread workerThread =
675 _stpStartInfo.MaxStackSize.HasValue 675 _stpStartInfo.MaxStackSize.HasValue
676 ? new Thread(ProcessQueuedItems, _stpStartInfo.MaxStackSize.Value) 676 ? new Thread(ProcessQueuedItems, _stpStartInfo.MaxStackSize.Value)
677 : new Thread(ProcessQueuedItems); 677 : new Thread(ProcessQueuedItems);
678#endif 678#endif
679 // Configure the new thread and start it 679 // Configure the new thread and start it
680 workerThread.Name = "STP " + Name + " Thread #" + _threadCounter; 680 workerThread.Name = "STP " + Name + " Thread #" + _threadCounter;
681 workerThread.IsBackground = _stpStartInfo.AreThreadsBackground; 681 workerThread.IsBackground = _stpStartInfo.AreThreadsBackground;
682 682
683#if !(_SILVERLIGHT) && !(_WINDOWS_CE) && !(WINDOWS_PHONE) 683#if !(_SILVERLIGHT) && !(_WINDOWS_CE) && !(WINDOWS_PHONE)
684 if (_stpStartInfo.ApartmentState != ApartmentState.Unknown) 684 if (_stpStartInfo.ApartmentState != ApartmentState.Unknown)
685 { 685 {
686 workerThread.SetApartmentState(_stpStartInfo.ApartmentState); 686 workerThread.SetApartmentState(_stpStartInfo.ApartmentState);
687 } 687 }
688#endif 688#endif
689 689
690#if !(_SILVERLIGHT) && !(WINDOWS_PHONE) 690#if !(_SILVERLIGHT) && !(WINDOWS_PHONE)
691 workerThread.Priority = _stpStartInfo.ThreadPriority; 691 workerThread.Priority = _stpStartInfo.ThreadPriority;
692#endif 692#endif
693 workerThread.Start(); 693 workerThread.Start();
694 ++_threadCounter; 694 ++_threadCounter;
695 695
696 // Add it to the dictionary and update its creation time. 696 // Add it to the dictionary and update its creation time.
697 _workerThreads[workerThread] = new ThreadEntry(this); 697 _workerThreads[workerThread] = new ThreadEntry(this);
698 698
699 _windowsPCs.SampleThreads(_workerThreads.Count, _inUseWorkerThreads); 699 _windowsPCs.SampleThreads(_workerThreads.Count, _inUseWorkerThreads);
700 _localPCs.SampleThreads(_workerThreads.Count, _inUseWorkerThreads); 700 _localPCs.SampleThreads(_workerThreads.Count, _inUseWorkerThreads);
701 } 701 }
702 } 702 }
703 } 703 }
704 704
705 /// <summary> 705 /// <summary>
706 /// A worker thread method that processes work items from the work items queue. 706 /// A worker thread method that processes work items from the work items queue.
707 /// </summary> 707 /// </summary>
708 private void ProcessQueuedItems() 708 private void ProcessQueuedItems()
709 { 709 {
710 // Keep the entry of the dictionary as thread's variable to avoid the synchronization locks 710 // Keep the entry of the dictionary as thread's variable to avoid the synchronization locks
711 // of the dictionary. 711 // of the dictionary.
712 CurrentThreadEntry = _workerThreads[Thread.CurrentThread]; 712 CurrentThreadEntry = _workerThreads[Thread.CurrentThread];
713 713
714 FireOnThreadInitialization(); 714 FireOnThreadInitialization();
715 715
716 try 716 try
717 { 717 {
718 bool bInUseWorkerThreadsWasIncremented = false; 718 bool bInUseWorkerThreadsWasIncremented = false;
719 719
720 // Process until shutdown. 720 // Process until shutdown.
721 while(!_shutdown) 721 while(!_shutdown)
722 { 722 {
723 // Update the last time this thread was seen alive. 723 // Update the last time this thread was seen alive.
724 // It's good for debugging. 724 // It's good for debugging.
725 CurrentThreadEntry.IAmAlive(); 725 CurrentThreadEntry.IAmAlive();
726 726
727 // The following block handles the when the MaxWorkerThreads has been 727 // The following block handles the when the MaxWorkerThreads has been
728 // incremented by the user at run-time. 728 // incremented by the user at run-time.
729 // Double lock for quit. 729 // Double lock for quit.
730 if (_workerThreads.Count > _stpStartInfo.MaxWorkerThreads) 730 if (_workerThreads.Count > _stpStartInfo.MaxWorkerThreads)
731 { 731 {
732 lock (_workerThreads.SyncRoot) 732 lock (_workerThreads.SyncRoot)
733 { 733 {
734 if (_workerThreads.Count > _stpStartInfo.MaxWorkerThreads) 734 if (_workerThreads.Count > _stpStartInfo.MaxWorkerThreads)
735 { 735 {
736 // Inform that the thread is quiting and then quit. 736 // Inform that the thread is quiting and then quit.
737 // This method must be called within this lock or else 737 // This method must be called within this lock or else
738 // more threads will quit and the thread pool will go 738 // more threads will quit and the thread pool will go
739 // below the lower limit. 739 // below the lower limit.
740 InformCompleted(); 740 InformCompleted();
741 break; 741 break;
742 } 742 }
743 } 743 }
744 } 744 }
745 745
746 // Wait for a work item, shutdown, or timeout 746 // Wait for a work item, shutdown, or timeout
747 WorkItem workItem = Dequeue(); 747 WorkItem workItem = Dequeue();
748 748
749 // Update the last time this thread was seen alive. 749 // Update the last time this thread was seen alive.
750 // It's good for debugging. 750 // It's good for debugging.
751 CurrentThreadEntry.IAmAlive(); 751 CurrentThreadEntry.IAmAlive();
752 752
753 // On timeout or shut down. 753 // On timeout or shut down.
754 if (null == workItem) 754 if (null == workItem)
755 { 755 {
756 // Double lock for quit. 756 // Double lock for quit.
757 if (_workerThreads.Count > _stpStartInfo.MinWorkerThreads) 757 if (_workerThreads.Count > _stpStartInfo.MinWorkerThreads)
758 { 758 {
759 lock(_workerThreads.SyncRoot) 759 lock(_workerThreads.SyncRoot)
760 { 760 {
761 if (_workerThreads.Count > _stpStartInfo.MinWorkerThreads) 761 if (_workerThreads.Count > _stpStartInfo.MinWorkerThreads)
762 { 762 {
763 // Inform that the thread is quiting and then quit. 763 // Inform that the thread is quiting and then quit.
764 // This method must be called within this lock or else 764 // This method must be called within this lock or else
765 // more threads will quit and the thread pool will go 765 // more threads will quit and the thread pool will go
766 // below the lower limit. 766 // below the lower limit.
767 InformCompleted(); 767 InformCompleted();
768 break; 768 break;
769 } 769 }
770 } 770 }
771 } 771 }
772 } 772 }
773 773
774 // If we didn't quit then skip to the next iteration. 774 // If we didn't quit then skip to the next iteration.
775 if (null == workItem) 775 if (null == workItem)
776 { 776 {
777 continue; 777 continue;
778 } 778 }
779 779
780 try 780 try
781 { 781 {
782 // Initialize the value to false 782 // Initialize the value to false
783 bInUseWorkerThreadsWasIncremented = false; 783 bInUseWorkerThreadsWasIncremented = false;
784 784
785 // Set the Current Work Item of the thread. 785 // Set the Current Work Item of the thread.
786 // Store the Current Work Item before the workItem.StartingWorkItem() is called, 786 // Store the Current Work Item before the workItem.StartingWorkItem() is called,
787 // so WorkItem.Cancel can work when the work item is between InQueue and InProgress 787 // so WorkItem.Cancel can work when the work item is between InQueue and InProgress
788 // states. 788 // states.
789 // If the work item has been cancelled BEFORE the workItem.StartingWorkItem() 789 // If the work item has been cancelled BEFORE the workItem.StartingWorkItem()
790 // (work item is in InQueue state) then workItem.StartingWorkItem() will return false. 790 // (work item is in InQueue state) then workItem.StartingWorkItem() will return false.
791 // If the work item has been cancelled AFTER the workItem.StartingWorkItem() then 791 // If the work item has been cancelled AFTER the workItem.StartingWorkItem() then
792 // (work item is in InProgress state) then the thread will be aborted 792 // (work item is in InProgress state) then the thread will be aborted
793 CurrentThreadEntry.CurrentWorkItem = workItem; 793 CurrentThreadEntry.CurrentWorkItem = workItem;
794 794
795 // Change the state of the work item to 'in progress' if possible. 795 // Change the state of the work item to 'in progress' if possible.
796 // We do it here so if the work item has been canceled we won't 796 // We do it here so if the work item has been canceled we won't
797 // increment the _inUseWorkerThreads. 797 // increment the _inUseWorkerThreads.
798 // The cancel mechanism doesn't delete items from the queue, 798 // The cancel mechanism doesn't delete items from the queue,
799 // it marks the work item as canceled, and when the work item 799 // it marks the work item as canceled, and when the work item
800 // is dequeued, we just skip it. 800 // is dequeued, we just skip it.
801 // If the post execute of work item is set to always or to 801 // If the post execute of work item is set to always or to
802 // call when the work item is canceled then the StartingWorkItem() 802 // call when the work item is canceled then the StartingWorkItem()
803 // will return true, so the post execute can run. 803 // will return true, so the post execute can run.
804 if (!workItem.StartingWorkItem()) 804 if (!workItem.StartingWorkItem())
805 { 805 {
806 continue; 806 continue;
807 } 807 }
808 808
809 // Execute the callback. Make sure to accurately 809 // Execute the callback. Make sure to accurately
810 // record how many callbacks are currently executing. 810 // record how many callbacks are currently executing.
811 int inUseWorkerThreads = Interlocked.Increment(ref _inUseWorkerThreads); 811 int inUseWorkerThreads = Interlocked.Increment(ref _inUseWorkerThreads);
812 _windowsPCs.SampleThreads(_workerThreads.Count, inUseWorkerThreads); 812 _windowsPCs.SampleThreads(_workerThreads.Count, inUseWorkerThreads);
813 _localPCs.SampleThreads(_workerThreads.Count, inUseWorkerThreads); 813 _localPCs.SampleThreads(_workerThreads.Count, inUseWorkerThreads);
814 814
815 // Mark that the _inUseWorkerThreads incremented, so in the finally{} 815 // Mark that the _inUseWorkerThreads incremented, so in the finally{}
816 // statement we will decrement it correctly. 816 // statement we will decrement it correctly.
817 bInUseWorkerThreadsWasIncremented = true; 817 bInUseWorkerThreadsWasIncremented = true;
818 818
819 workItem.FireWorkItemStarted(); 819 workItem.FireWorkItemStarted();
820 820
821 ExecuteWorkItem(workItem); 821 ExecuteWorkItem(workItem);
822 } 822 }
823 catch(Exception ex) 823 catch(Exception ex)
824 { 824 {
825 ex.GetHashCode(); 825 ex.GetHashCode();
826 // Do nothing 826 // Do nothing
827 } 827 }
828 finally 828 finally
829 { 829 {
830 workItem.DisposeOfState(); 830 workItem.DisposeOfState();
831 831
832 // Set the CurrentWorkItem to null, since we 832 // Set the CurrentWorkItem to null, since we
833 // no longer run user's code. 833 // no longer run user's code.
834 CurrentThreadEntry.CurrentWorkItem = null; 834 CurrentThreadEntry.CurrentWorkItem = null;
835 835
836 // Decrement the _inUseWorkerThreads only if we had 836 // Decrement the _inUseWorkerThreads only if we had
837 // incremented it. Note the cancelled work items don't 837 // incremented it. Note the cancelled work items don't
838 // increment _inUseWorkerThreads. 838 // increment _inUseWorkerThreads.
839 if (bInUseWorkerThreadsWasIncremented) 839 if (bInUseWorkerThreadsWasIncremented)
840 { 840 {
841 int inUseWorkerThreads = Interlocked.Decrement(ref _inUseWorkerThreads); 841 int inUseWorkerThreads = Interlocked.Decrement(ref _inUseWorkerThreads);
842 _windowsPCs.SampleThreads(_workerThreads.Count, inUseWorkerThreads); 842 _windowsPCs.SampleThreads(_workerThreads.Count, inUseWorkerThreads);
843 _localPCs.SampleThreads(_workerThreads.Count, inUseWorkerThreads); 843 _localPCs.SampleThreads(_workerThreads.Count, inUseWorkerThreads);
844 } 844 }
845 845
846 // Notify that the work item has been completed. 846 // Notify that the work item has been completed.
847 // WorkItemsGroup may enqueue their next work item. 847 // WorkItemsGroup may enqueue their next work item.
848 workItem.FireWorkItemCompleted(); 848 workItem.FireWorkItemCompleted();
849 849
850 // Decrement the number of work items here so the idle 850 // Decrement the number of work items here so the idle
851 // ManualResetEvent won't fluctuate. 851 // ManualResetEvent won't fluctuate.
852 DecrementWorkItemsCount(); 852 DecrementWorkItemsCount();
853 } 853 }
854 } 854 }
855 } 855 }
856 catch(ThreadAbortException tae) 856 catch(ThreadAbortException tae)
857 { 857 {
858 tae.GetHashCode(); 858 tae.GetHashCode();
859 // Handle the abort exception gracfully. 859 // Handle the abort exception gracfully.
860#if !(_WINDOWS_CE) && !(_SILVERLIGHT) && !(WINDOWS_PHONE) 860#if !(_WINDOWS_CE) && !(_SILVERLIGHT) && !(WINDOWS_PHONE)
861 Thread.ResetAbort(); 861 Thread.ResetAbort();
862#endif 862#endif
863 } 863 }
864 catch(Exception e) 864 catch(Exception e)
865 { 865 {
866 Debug.Assert(null != e); 866 Debug.Assert(null != e);
867 } 867 }
868 finally 868 finally
869 { 869 {
870 InformCompleted(); 870 InformCompleted();
871 FireOnThreadTermination(); 871 FireOnThreadTermination();
872 } 872 }
873 } 873 }
874 874
875 private void ExecuteWorkItem(WorkItem workItem) 875 private void ExecuteWorkItem(WorkItem workItem)
876 { 876 {
877 _windowsPCs.SampleWorkItemsWaitTime(workItem.WaitingTime); 877 _windowsPCs.SampleWorkItemsWaitTime(workItem.WaitingTime);
878 _localPCs.SampleWorkItemsWaitTime(workItem.WaitingTime); 878 _localPCs.SampleWorkItemsWaitTime(workItem.WaitingTime);
879 try 879 try
880 { 880 {
881 workItem.Execute(); 881 workItem.Execute();
882 } 882 }
883 finally 883 finally
884 { 884 {
885 _windowsPCs.SampleWorkItemsProcessTime(workItem.ProcessTime); 885 _windowsPCs.SampleWorkItemsProcessTime(workItem.ProcessTime);
886 _localPCs.SampleWorkItemsProcessTime(workItem.ProcessTime); 886 _localPCs.SampleWorkItemsProcessTime(workItem.ProcessTime);
887 } 887 }
888 } 888 }
889 889
890 890
891 #endregion 891 #endregion
892 892
893 #region Public Methods 893 #region Public Methods
894 894
895 private void ValidateWaitForIdle() 895 private void ValidateWaitForIdle()
896 { 896 {
897 if (null != CurrentThreadEntry && CurrentThreadEntry.AssociatedSmartThreadPool == this) 897 if (null != CurrentThreadEntry && CurrentThreadEntry.AssociatedSmartThreadPool == this)
898 { 898 {
899 throw new NotSupportedException( 899 throw new NotSupportedException(
900 "WaitForIdle cannot be called from a thread on its SmartThreadPool, it causes a deadlock"); 900 "WaitForIdle cannot be called from a thread on its SmartThreadPool, it causes a deadlock");
901 } 901 }
902 } 902 }
903 903
904 internal static void ValidateWorkItemsGroupWaitForIdle(IWorkItemsGroup workItemsGroup) 904 internal static void ValidateWorkItemsGroupWaitForIdle(IWorkItemsGroup workItemsGroup)
905 { 905 {
906 if (null == CurrentThreadEntry) 906 if (null == CurrentThreadEntry)
907 { 907 {
908 return; 908 return;
909 } 909 }
910 910
911 WorkItem workItem = CurrentThreadEntry.CurrentWorkItem; 911 WorkItem workItem = CurrentThreadEntry.CurrentWorkItem;
912 ValidateWorkItemsGroupWaitForIdleImpl(workItemsGroup, workItem); 912 ValidateWorkItemsGroupWaitForIdleImpl(workItemsGroup, workItem);
913 if ((null != workItemsGroup) && 913 if ((null != workItemsGroup) &&
914 (null != workItem) && 914 (null != workItem) &&
915 CurrentThreadEntry.CurrentWorkItem.WasQueuedBy(workItemsGroup)) 915 CurrentThreadEntry.CurrentWorkItem.WasQueuedBy(workItemsGroup))
916 { 916 {
917 throw new NotSupportedException("WaitForIdle cannot be called from a thread on its SmartThreadPool, it causes a deadlock"); 917 throw new NotSupportedException("WaitForIdle cannot be called from a thread on its SmartThreadPool, it causes a deadlock");
918 } 918 }
919 } 919 }
920 920
921 [MethodImpl(MethodImplOptions.NoInlining)] 921 [MethodImpl(MethodImplOptions.NoInlining)]
922 private static void ValidateWorkItemsGroupWaitForIdleImpl(IWorkItemsGroup workItemsGroup, WorkItem workItem) 922 private static void ValidateWorkItemsGroupWaitForIdleImpl(IWorkItemsGroup workItemsGroup, WorkItem workItem)
923 { 923 {
924 if ((null != workItemsGroup) && 924 if ((null != workItemsGroup) &&
925 (null != workItem) && 925 (null != workItem) &&
926 workItem.WasQueuedBy(workItemsGroup)) 926 workItem.WasQueuedBy(workItemsGroup))
927 { 927 {
928 throw new NotSupportedException("WaitForIdle cannot be called from a thread on its SmartThreadPool, it causes a deadlock"); 928 throw new NotSupportedException("WaitForIdle cannot be called from a thread on its SmartThreadPool, it causes a deadlock");
929 } 929 }
930 } 930 }
931 931
932 /// <summary> 932 /// <summary>
933 /// Force the SmartThreadPool to shutdown 933 /// Force the SmartThreadPool to shutdown
934 /// </summary> 934 /// </summary>
935 public void Shutdown() 935 public void Shutdown()
936 { 936 {
937 Shutdown(true, 0); 937 Shutdown(true, 0);
938 } 938 }
939 939
940 /// <summary> 940 /// <summary>
941 /// Force the SmartThreadPool to shutdown with timeout 941 /// Force the SmartThreadPool to shutdown with timeout
942 /// </summary> 942 /// </summary>
943 public void Shutdown(bool forceAbort, TimeSpan timeout) 943 public void Shutdown(bool forceAbort, TimeSpan timeout)
944 { 944 {
945 Shutdown(forceAbort, (int)timeout.TotalMilliseconds); 945 Shutdown(forceAbort, (int)timeout.TotalMilliseconds);
946 } 946 }
947 947
948 /// <summary> 948 /// <summary>
949 /// Empties the queue of work items and abort the threads in the pool. 949 /// Empties the queue of work items and abort the threads in the pool.
950 /// </summary> 950 /// </summary>
951 public void Shutdown(bool forceAbort, int millisecondsTimeout) 951 public void Shutdown(bool forceAbort, int millisecondsTimeout)
952 { 952 {
953 ValidateNotDisposed(); 953 ValidateNotDisposed();
954 954
955 ISTPInstancePerformanceCounters pcs = _windowsPCs; 955 ISTPInstancePerformanceCounters pcs = _windowsPCs;
956 956
957 if (NullSTPInstancePerformanceCounters.Instance != _windowsPCs) 957 if (NullSTPInstancePerformanceCounters.Instance != _windowsPCs)
958 { 958 {
959 // Set the _pcs to "null" to stop updating the performance 959 // Set the _pcs to "null" to stop updating the performance
960 // counters 960 // counters
961 _windowsPCs = NullSTPInstancePerformanceCounters.Instance; 961 _windowsPCs = NullSTPInstancePerformanceCounters.Instance;
962 962
963 pcs.Dispose(); 963 pcs.Dispose();
964 } 964 }
965 965
966 Thread [] threads; 966 Thread [] threads;
967 lock(_workerThreads.SyncRoot) 967 lock(_workerThreads.SyncRoot)
968 { 968 {
969 // Shutdown the work items queue 969 // Shutdown the work items queue
970 _workItemsQueue.Dispose(); 970 _workItemsQueue.Dispose();
971 971
972 // Signal the threads to exit 972 // Signal the threads to exit
973 _shutdown = true; 973 _shutdown = true;
974 _shuttingDownEvent.Set(); 974 _shuttingDownEvent.Set();
975 975
976 // Make a copy of the threads' references in the pool 976 // Make a copy of the threads' references in the pool
977 threads = new Thread [_workerThreads.Count]; 977 threads = new Thread [_workerThreads.Count];
978 _workerThreads.Keys.CopyTo(threads, 0); 978 _workerThreads.Keys.CopyTo(threads, 0);
979 } 979 }
980 980
981 int millisecondsLeft = millisecondsTimeout; 981 int millisecondsLeft = millisecondsTimeout;
982 Stopwatch stopwatch = Stopwatch.StartNew(); 982 Stopwatch stopwatch = Stopwatch.StartNew();
983 //DateTime start = DateTime.UtcNow; 983 //DateTime start = DateTime.UtcNow;
984 bool waitInfinitely = (Timeout.Infinite == millisecondsTimeout); 984 bool waitInfinitely = (Timeout.Infinite == millisecondsTimeout);
985 bool timeout = false; 985 bool timeout = false;
986 986
987 // Each iteration we update the time left for the timeout. 987 // Each iteration we update the time left for the timeout.
988 foreach(Thread thread in threads) 988 foreach(Thread thread in threads)
989 { 989 {
990 // Join don't work with negative numbers 990 // Join don't work with negative numbers
991 if (!waitInfinitely && (millisecondsLeft < 0)) 991 if (!waitInfinitely && (millisecondsLeft < 0))
992 { 992 {
993 timeout = true; 993 timeout = true;
994 break; 994 break;
995 } 995 }
996 996
997 // Wait for the thread to terminate 997 // Wait for the thread to terminate
998 bool success = thread.Join(millisecondsLeft); 998 bool success = thread.Join(millisecondsLeft);
999 if(!success) 999 if(!success)
1000 { 1000 {
1001 timeout = true; 1001 timeout = true;
1002 break; 1002 break;
1003 } 1003 }
1004 1004
1005 if(!waitInfinitely) 1005 if(!waitInfinitely)
1006 { 1006 {
1007 // Update the time left to wait 1007 // Update the time left to wait
1008 //TimeSpan ts = DateTime.UtcNow - start; 1008 //TimeSpan ts = DateTime.UtcNow - start;
1009 millisecondsLeft = millisecondsTimeout - (int)stopwatch.ElapsedMilliseconds; 1009 millisecondsLeft = millisecondsTimeout - (int)stopwatch.ElapsedMilliseconds;
1010 } 1010 }
1011 } 1011 }
1012 1012
1013 if (timeout && forceAbort) 1013 if (timeout && forceAbort)
1014 { 1014 {
1015 // Abort the threads in the pool 1015 // Abort the threads in the pool
1016 foreach(Thread thread in threads) 1016 foreach(Thread thread in threads)
1017 { 1017 {
1018 1018
1019 if ((thread != null) 1019 if ((thread != null)
1020#if !(_WINDOWS_CE) 1020#if !(_WINDOWS_CE)
1021 && thread.IsAlive 1021 && thread.IsAlive
1022#endif 1022#endif
1023 ) 1023 )
1024 { 1024 {
1025 try 1025 try
1026 { 1026 {
1027 thread.Abort(); // Shutdown 1027 thread.Abort(); // Shutdown
1028 } 1028 }
1029 catch(SecurityException e) 1029 catch(SecurityException e)
1030 { 1030 {
1031 e.GetHashCode(); 1031 e.GetHashCode();
1032 } 1032 }
1033 catch(ThreadStateException ex) 1033 catch(ThreadStateException ex)
1034 { 1034 {
1035 ex.GetHashCode(); 1035 ex.GetHashCode();
1036 // In case the thread has been terminated 1036 // In case the thread has been terminated
1037 // after the check if it is alive. 1037 // after the check if it is alive.
1038 } 1038 }
1039 } 1039 }
1040 } 1040 }
1041 } 1041 }
1042 } 1042 }
1043 1043
1044 /// <summary> 1044 /// <summary>
1045 /// Wait for all work items to complete 1045 /// Wait for all work items to complete
1046 /// </summary> 1046 /// </summary>
1047 /// <param name="waitableResults">Array of work item result objects</param> 1047 /// <param name="waitableResults">Array of work item result objects</param>
1048 /// <returns> 1048 /// <returns>
1049 /// true when every work item in workItemResults has completed; otherwise false. 1049 /// true when every work item in workItemResults has completed; otherwise false.
1050 /// </returns> 1050 /// </returns>
1051 public static bool WaitAll( 1051 public static bool WaitAll(
1052 IWaitableResult [] waitableResults) 1052 IWaitableResult [] waitableResults)
1053 { 1053 {
1054 return WaitAll(waitableResults, Timeout.Infinite, true); 1054 return WaitAll(waitableResults, Timeout.Infinite, true);
1055 } 1055 }
1056 1056
1057 /// <summary> 1057 /// <summary>
1058 /// Wait for all work items to complete 1058 /// Wait for all work items to complete
1059 /// </summary> 1059 /// </summary>
1060 /// <param name="waitableResults">Array of work item result objects</param> 1060 /// <param name="waitableResults">Array of work item result objects</param>
1061 /// <param name="timeout">The number of milliseconds to wait, or a TimeSpan that represents -1 milliseconds to wait indefinitely. </param> 1061 /// <param name="timeout">The number of milliseconds to wait, or a TimeSpan that represents -1 milliseconds to wait indefinitely. </param>
1062 /// <param name="exitContext"> 1062 /// <param name="exitContext">
1063 /// true to exit the synchronization domain for the context before the wait (if in a synchronized context), and reacquire it; otherwise, false. 1063 /// true to exit the synchronization domain for the context before the wait (if in a synchronized context), and reacquire it; otherwise, false.
1064 /// </param> 1064 /// </param>
1065 /// <returns> 1065 /// <returns>
1066 /// true when every work item in workItemResults has completed; otherwise false. 1066 /// true when every work item in workItemResults has completed; otherwise false.
1067 /// </returns> 1067 /// </returns>
1068 public static bool WaitAll( 1068 public static bool WaitAll(
1069 IWaitableResult [] waitableResults, 1069 IWaitableResult [] waitableResults,
1070 TimeSpan timeout, 1070 TimeSpan timeout,
1071 bool exitContext) 1071 bool exitContext)
1072 { 1072 {
1073 return WaitAll(waitableResults, (int)timeout.TotalMilliseconds, exitContext); 1073 return WaitAll(waitableResults, (int)timeout.TotalMilliseconds, exitContext);
1074 } 1074 }
1075 1075
1076 /// <summary> 1076 /// <summary>
1077 /// Wait for all work items to complete 1077 /// Wait for all work items to complete
1078 /// </summary> 1078 /// </summary>
1079 /// <param name="waitableResults">Array of work item result objects</param> 1079 /// <param name="waitableResults">Array of work item result objects</param>
1080 /// <param name="timeout">The number of milliseconds to wait, or a TimeSpan that represents -1 milliseconds to wait indefinitely. </param> 1080 /// <param name="timeout">The number of milliseconds to wait, or a TimeSpan that represents -1 milliseconds to wait indefinitely. </param>
1081 /// <param name="exitContext"> 1081 /// <param name="exitContext">
1082 /// true to exit the synchronization domain for the context before the wait (if in a synchronized context), and reacquire it; otherwise, false. 1082 /// true to exit the synchronization domain for the context before the wait (if in a synchronized context), and reacquire it; otherwise, false.
1083 /// </param> 1083 /// </param>
1084 /// <param name="cancelWaitHandle">A cancel wait handle to interrupt the wait if needed</param> 1084 /// <param name="cancelWaitHandle">A cancel wait handle to interrupt the wait if needed</param>
1085 /// <returns> 1085 /// <returns>
1086 /// true when every work item in workItemResults has completed; otherwise false. 1086 /// true when every work item in workItemResults has completed; otherwise false.
1087 /// </returns> 1087 /// </returns>
1088 public static bool WaitAll( 1088 public static bool WaitAll(
1089 IWaitableResult[] waitableResults, 1089 IWaitableResult[] waitableResults,
1090 TimeSpan timeout, 1090 TimeSpan timeout,
1091 bool exitContext, 1091 bool exitContext,
1092 WaitHandle cancelWaitHandle) 1092 WaitHandle cancelWaitHandle)
1093 { 1093 {
1094 return WaitAll(waitableResults, (int)timeout.TotalMilliseconds, exitContext, cancelWaitHandle); 1094 return WaitAll(waitableResults, (int)timeout.TotalMilliseconds, exitContext, cancelWaitHandle);
1095 } 1095 }
1096 1096
1097 /// <summary> 1097 /// <summary>
1098 /// Wait for all work items to complete 1098 /// Wait for all work items to complete
1099 /// </summary> 1099 /// </summary>
1100 /// <param name="waitableResults">Array of work item result objects</param> 1100 /// <param name="waitableResults">Array of work item result objects</param>
1101 /// <param name="millisecondsTimeout">The number of milliseconds to wait, or Timeout.Infinite (-1) to wait indefinitely.</param> 1101 /// <param name="millisecondsTimeout">The number of milliseconds to wait, or Timeout.Infinite (-1) to wait indefinitely.</param>
1102 /// <param name="exitContext"> 1102 /// <param name="exitContext">
1103 /// true to exit the synchronization domain for the context before the wait (if in a synchronized context), and reacquire it; otherwise, false. 1103 /// true to exit the synchronization domain for the context before the wait (if in a synchronized context), and reacquire it; otherwise, false.
1104 /// </param> 1104 /// </param>
1105 /// <returns> 1105 /// <returns>
1106 /// true when every work item in workItemResults has completed; otherwise false. 1106 /// true when every work item in workItemResults has completed; otherwise false.
1107 /// </returns> 1107 /// </returns>
1108 public static bool WaitAll( 1108 public static bool WaitAll(
1109 IWaitableResult [] waitableResults, 1109 IWaitableResult [] waitableResults,
1110 int millisecondsTimeout, 1110 int millisecondsTimeout,
1111 bool exitContext) 1111 bool exitContext)
1112 { 1112 {
1113 return WorkItem.WaitAll(waitableResults, millisecondsTimeout, exitContext, null); 1113 return WorkItem.WaitAll(waitableResults, millisecondsTimeout, exitContext, null);
1114 } 1114 }
1115 1115
1116 /// <summary> 1116 /// <summary>
1117 /// Wait for all work items to complete 1117 /// Wait for all work items to complete
1118 /// </summary> 1118 /// </summary>
1119 /// <param name="waitableResults">Array of work item result objects</param> 1119 /// <param name="waitableResults">Array of work item result objects</param>
1120 /// <param name="millisecondsTimeout">The number of milliseconds to wait, or Timeout.Infinite (-1) to wait indefinitely.</param> 1120 /// <param name="millisecondsTimeout">The number of milliseconds to wait, or Timeout.Infinite (-1) to wait indefinitely.</param>
1121 /// <param name="exitContext"> 1121 /// <param name="exitContext">
1122 /// true to exit the synchronization domain for the context before the wait (if in a synchronized context), and reacquire it; otherwise, false. 1122 /// true to exit the synchronization domain for the context before the wait (if in a synchronized context), and reacquire it; otherwise, false.
1123 /// </param> 1123 /// </param>
1124 /// <param name="cancelWaitHandle">A cancel wait handle to interrupt the wait if needed</param> 1124 /// <param name="cancelWaitHandle">A cancel wait handle to interrupt the wait if needed</param>
1125 /// <returns> 1125 /// <returns>
1126 /// true when every work item in workItemResults has completed; otherwise false. 1126 /// true when every work item in workItemResults has completed; otherwise false.
1127 /// </returns> 1127 /// </returns>
1128 public static bool WaitAll( 1128 public static bool WaitAll(
1129 IWaitableResult[] waitableResults, 1129 IWaitableResult[] waitableResults,
1130 int millisecondsTimeout, 1130 int millisecondsTimeout,
1131 bool exitContext, 1131 bool exitContext,
1132 WaitHandle cancelWaitHandle) 1132 WaitHandle cancelWaitHandle)
1133 { 1133 {
1134 return WorkItem.WaitAll(waitableResults, millisecondsTimeout, exitContext, cancelWaitHandle); 1134 return WorkItem.WaitAll(waitableResults, millisecondsTimeout, exitContext, cancelWaitHandle);
1135 } 1135 }
1136 1136
1137 1137
1138 /// <summary> 1138 /// <summary>
1139 /// Waits for any of the work items in the specified array to complete, cancel, or timeout 1139 /// Waits for any of the work items in the specified array to complete, cancel, or timeout
1140 /// </summary> 1140 /// </summary>
1141 /// <param name="waitableResults">Array of work item result objects</param> 1141 /// <param name="waitableResults">Array of work item result objects</param>
1142 /// <returns> 1142 /// <returns>
1143 /// The array index of the work item result that satisfied the wait, or WaitTimeout if any of the work items has been canceled. 1143 /// The array index of the work item result that satisfied the wait, or WaitTimeout if any of the work items has been canceled.
1144 /// </returns> 1144 /// </returns>
1145 public static int WaitAny( 1145 public static int WaitAny(
1146 IWaitableResult [] waitableResults) 1146 IWaitableResult [] waitableResults)
1147 { 1147 {
1148 return WaitAny(waitableResults, Timeout.Infinite, true); 1148 return WaitAny(waitableResults, Timeout.Infinite, true);
1149 } 1149 }
1150 1150
1151 /// <summary> 1151 /// <summary>
1152 /// Waits for any of the work items in the specified array to complete, cancel, or timeout 1152 /// Waits for any of the work items in the specified array to complete, cancel, or timeout
1153 /// </summary> 1153 /// </summary>
1154 /// <param name="waitableResults">Array of work item result objects</param> 1154 /// <param name="waitableResults">Array of work item result objects</param>
1155 /// <param name="timeout">The number of milliseconds to wait, or a TimeSpan that represents -1 milliseconds to wait indefinitely. </param> 1155 /// <param name="timeout">The number of milliseconds to wait, or a TimeSpan that represents -1 milliseconds to wait indefinitely. </param>
1156 /// <param name="exitContext"> 1156 /// <param name="exitContext">
1157 /// true to exit the synchronization domain for the context before the wait (if in a synchronized context), and reacquire it; otherwise, false. 1157 /// true to exit the synchronization domain for the context before the wait (if in a synchronized context), and reacquire it; otherwise, false.
1158 /// </param> 1158 /// </param>
1159 /// <returns> 1159 /// <returns>
1160 /// The array index of the work item result that satisfied the wait, or WaitTimeout if no work item result satisfied the wait and a time interval equivalent to millisecondsTimeout has passed or the work item has been canceled. 1160 /// The array index of the work item result that satisfied the wait, or WaitTimeout if no work item result satisfied the wait and a time interval equivalent to millisecondsTimeout has passed or the work item has been canceled.
1161 /// </returns> 1161 /// </returns>
1162 public static int WaitAny( 1162 public static int WaitAny(
1163 IWaitableResult[] waitableResults, 1163 IWaitableResult[] waitableResults,
1164 TimeSpan timeout, 1164 TimeSpan timeout,
1165 bool exitContext) 1165 bool exitContext)
1166 { 1166 {
1167 return WaitAny(waitableResults, (int)timeout.TotalMilliseconds, exitContext); 1167 return WaitAny(waitableResults, (int)timeout.TotalMilliseconds, exitContext);
1168 } 1168 }
1169 1169
1170 /// <summary> 1170 /// <summary>
1171 /// Waits for any of the work items in the specified array to complete, cancel, or timeout 1171 /// Waits for any of the work items in the specified array to complete, cancel, or timeout
1172 /// </summary> 1172 /// </summary>
1173 /// <param name="waitableResults">Array of work item result objects</param> 1173 /// <param name="waitableResults">Array of work item result objects</param>
1174 /// <param name="timeout">The number of milliseconds to wait, or a TimeSpan that represents -1 milliseconds to wait indefinitely. </param> 1174 /// <param name="timeout">The number of milliseconds to wait, or a TimeSpan that represents -1 milliseconds to wait indefinitely. </param>
1175 /// <param name="exitContext"> 1175 /// <param name="exitContext">
1176 /// true to exit the synchronization domain for the context before the wait (if in a synchronized context), and reacquire it; otherwise, false. 1176 /// true to exit the synchronization domain for the context before the wait (if in a synchronized context), and reacquire it; otherwise, false.
1177 /// </param> 1177 /// </param>
1178 /// <param name="cancelWaitHandle">A cancel wait handle to interrupt the wait if needed</param> 1178 /// <param name="cancelWaitHandle">A cancel wait handle to interrupt the wait if needed</param>
1179 /// <returns> 1179 /// <returns>
1180 /// The array index of the work item result that satisfied the wait, or WaitTimeout if no work item result satisfied the wait and a time interval equivalent to millisecondsTimeout has passed or the work item has been canceled. 1180 /// The array index of the work item result that satisfied the wait, or WaitTimeout if no work item result satisfied the wait and a time interval equivalent to millisecondsTimeout has passed or the work item has been canceled.
1181 /// </returns> 1181 /// </returns>
1182 public static int WaitAny( 1182 public static int WaitAny(
1183 IWaitableResult [] waitableResults, 1183 IWaitableResult [] waitableResults,
1184 TimeSpan timeout, 1184 TimeSpan timeout,
1185 bool exitContext, 1185 bool exitContext,
1186 WaitHandle cancelWaitHandle) 1186 WaitHandle cancelWaitHandle)
1187 { 1187 {
1188 return WaitAny(waitableResults, (int)timeout.TotalMilliseconds, exitContext, cancelWaitHandle); 1188 return WaitAny(waitableResults, (int)timeout.TotalMilliseconds, exitContext, cancelWaitHandle);
1189 } 1189 }
1190 1190
1191 /// <summary> 1191 /// <summary>
1192 /// Waits for any of the work items in the specified array to complete, cancel, or timeout 1192 /// Waits for any of the work items in the specified array to complete, cancel, or timeout
1193 /// </summary> 1193 /// </summary>
1194 /// <param name="waitableResults">Array of work item result objects</param> 1194 /// <param name="waitableResults">Array of work item result objects</param>
1195 /// <param name="millisecondsTimeout">The number of milliseconds to wait, or Timeout.Infinite (-1) to wait indefinitely.</param> 1195 /// <param name="millisecondsTimeout">The number of milliseconds to wait, or Timeout.Infinite (-1) to wait indefinitely.</param>
1196 /// <param name="exitContext"> 1196 /// <param name="exitContext">
1197 /// true to exit the synchronization domain for the context before the wait (if in a synchronized context), and reacquire it; otherwise, false. 1197 /// true to exit the synchronization domain for the context before the wait (if in a synchronized context), and reacquire it; otherwise, false.
1198 /// </param> 1198 /// </param>
1199 /// <returns> 1199 /// <returns>
1200 /// The array index of the work item result that satisfied the wait, or WaitTimeout if no work item result satisfied the wait and a time interval equivalent to millisecondsTimeout has passed or the work item has been canceled. 1200 /// The array index of the work item result that satisfied the wait, or WaitTimeout if no work item result satisfied the wait and a time interval equivalent to millisecondsTimeout has passed or the work item has been canceled.
1201 /// </returns> 1201 /// </returns>
1202 public static int WaitAny( 1202 public static int WaitAny(
1203 IWaitableResult [] waitableResults, 1203 IWaitableResult [] waitableResults,
1204 int millisecondsTimeout, 1204 int millisecondsTimeout,
1205 bool exitContext) 1205 bool exitContext)
1206 { 1206 {
1207 return WorkItem.WaitAny(waitableResults, millisecondsTimeout, exitContext, null); 1207 return WorkItem.WaitAny(waitableResults, millisecondsTimeout, exitContext, null);
1208 } 1208 }
1209 1209
1210 /// <summary> 1210 /// <summary>
1211 /// Waits for any of the work items in the specified array to complete, cancel, or timeout 1211 /// Waits for any of the work items in the specified array to complete, cancel, or timeout
1212 /// </summary> 1212 /// </summary>
1213 /// <param name="waitableResults">Array of work item result objects</param> 1213 /// <param name="waitableResults">Array of work item result objects</param>
1214 /// <param name="millisecondsTimeout">The number of milliseconds to wait, or Timeout.Infinite (-1) to wait indefinitely.</param> 1214 /// <param name="millisecondsTimeout">The number of milliseconds to wait, or Timeout.Infinite (-1) to wait indefinitely.</param>
1215 /// <param name="exitContext"> 1215 /// <param name="exitContext">
1216 /// true to exit the synchronization domain for the context before the wait (if in a synchronized context), and reacquire it; otherwise, false. 1216 /// true to exit the synchronization domain for the context before the wait (if in a synchronized context), and reacquire it; otherwise, false.
1217 /// </param> 1217 /// </param>
1218 /// <param name="cancelWaitHandle">A cancel wait handle to interrupt the wait if needed</param> 1218 /// <param name="cancelWaitHandle">A cancel wait handle to interrupt the wait if needed</param>
1219 /// <returns> 1219 /// <returns>
1220 /// The array index of the work item result that satisfied the wait, or WaitTimeout if no work item result satisfied the wait and a time interval equivalent to millisecondsTimeout has passed or the work item has been canceled. 1220 /// The array index of the work item result that satisfied the wait, or WaitTimeout if no work item result satisfied the wait and a time interval equivalent to millisecondsTimeout has passed or the work item has been canceled.
1221 /// </returns> 1221 /// </returns>
1222 public static int WaitAny( 1222 public static int WaitAny(
1223 IWaitableResult [] waitableResults, 1223 IWaitableResult [] waitableResults,
1224 int millisecondsTimeout, 1224 int millisecondsTimeout,
1225 bool exitContext, 1225 bool exitContext,
1226 WaitHandle cancelWaitHandle) 1226 WaitHandle cancelWaitHandle)
1227 { 1227 {
1228 return WorkItem.WaitAny(waitableResults, millisecondsTimeout, exitContext, cancelWaitHandle); 1228 return WorkItem.WaitAny(waitableResults, millisecondsTimeout, exitContext, cancelWaitHandle);
1229 } 1229 }
1230 1230
1231 /// <summary> 1231 /// <summary>
1232 /// Creates a new WorkItemsGroup. 1232 /// Creates a new WorkItemsGroup.
1233 /// </summary> 1233 /// </summary>
1234 /// <param name="concurrency">The number of work items that can be run concurrently</param> 1234 /// <param name="concurrency">The number of work items that can be run concurrently</param>
1235 /// <returns>A reference to the WorkItemsGroup</returns> 1235 /// <returns>A reference to the WorkItemsGroup</returns>
1236 public IWorkItemsGroup CreateWorkItemsGroup(int concurrency) 1236 public IWorkItemsGroup CreateWorkItemsGroup(int concurrency)
1237 { 1237 {
1238 IWorkItemsGroup workItemsGroup = new WorkItemsGroup(this, concurrency, _stpStartInfo); 1238 IWorkItemsGroup workItemsGroup = new WorkItemsGroup(this, concurrency, _stpStartInfo);
1239 return workItemsGroup; 1239 return workItemsGroup;
1240 } 1240 }
1241 1241
1242 /// <summary> 1242 /// <summary>
1243 /// Creates a new WorkItemsGroup. 1243 /// Creates a new WorkItemsGroup.
1244 /// </summary> 1244 /// </summary>
1245 /// <param name="concurrency">The number of work items that can be run concurrently</param> 1245 /// <param name="concurrency">The number of work items that can be run concurrently</param>
1246 /// <param name="wigStartInfo">A WorkItemsGroup configuration that overrides the default behavior</param> 1246 /// <param name="wigStartInfo">A WorkItemsGroup configuration that overrides the default behavior</param>
1247 /// <returns>A reference to the WorkItemsGroup</returns> 1247 /// <returns>A reference to the WorkItemsGroup</returns>
1248 public IWorkItemsGroup CreateWorkItemsGroup(int concurrency, WIGStartInfo wigStartInfo) 1248 public IWorkItemsGroup CreateWorkItemsGroup(int concurrency, WIGStartInfo wigStartInfo)
1249 { 1249 {
1250 IWorkItemsGroup workItemsGroup = new WorkItemsGroup(this, concurrency, wigStartInfo); 1250 IWorkItemsGroup workItemsGroup = new WorkItemsGroup(this, concurrency, wigStartInfo);
1251 return workItemsGroup; 1251 return workItemsGroup;
1252 } 1252 }
1253 1253
1254 #region Fire Thread's Events 1254 #region Fire Thread's Events
1255 1255
1256 private void FireOnThreadInitialization() 1256 private void FireOnThreadInitialization()
1257 { 1257 {
1258 if (null != _onThreadInitialization) 1258 if (null != _onThreadInitialization)
1259 { 1259 {
1260 foreach (ThreadInitializationHandler tih in _onThreadInitialization.GetInvocationList()) 1260 foreach (ThreadInitializationHandler tih in _onThreadInitialization.GetInvocationList())
1261 { 1261 {
1262 try 1262 try
1263 { 1263 {
1264 tih(); 1264 tih();
1265 } 1265 }
1266 catch (Exception e) 1266 catch (Exception e)
1267 { 1267 {
1268 e.GetHashCode(); 1268 e.GetHashCode();
1269 Debug.Assert(false); 1269 Debug.Assert(false);
1270 throw; 1270 throw;
1271 } 1271 }
1272 } 1272 }
1273 } 1273 }
1274 } 1274 }
1275 1275
1276 private void FireOnThreadTermination() 1276 private void FireOnThreadTermination()
1277 { 1277 {
1278 if (null != _onThreadTermination) 1278 if (null != _onThreadTermination)
1279 { 1279 {
1280 foreach (ThreadTerminationHandler tth in _onThreadTermination.GetInvocationList()) 1280 foreach (ThreadTerminationHandler tth in _onThreadTermination.GetInvocationList())
1281 { 1281 {
1282 try 1282 try
1283 { 1283 {
1284 tth(); 1284 tth();
1285 } 1285 }
1286 catch (Exception e) 1286 catch (Exception e)
1287 { 1287 {
1288 e.GetHashCode(); 1288 e.GetHashCode();
1289 Debug.Assert(false); 1289 Debug.Assert(false);
1290 throw; 1290 throw;
1291 } 1291 }
1292 } 1292 }
1293 } 1293 }
1294 } 1294 }
1295 1295
1296 #endregion 1296 #endregion
1297 1297
1298 /// <summary> 1298 /// <summary>
1299 /// This event is fired when a thread is created. 1299 /// This event is fired when a thread is created.
1300 /// Use it to initialize a thread before the work items use it. 1300 /// Use it to initialize a thread before the work items use it.
1301 /// </summary> 1301 /// </summary>
1302 public event ThreadInitializationHandler OnThreadInitialization 1302 public event ThreadInitializationHandler OnThreadInitialization
1303 { 1303 {
1304 add { _onThreadInitialization += value; } 1304 add { _onThreadInitialization += value; }
1305 remove { _onThreadInitialization -= value; } 1305 remove { _onThreadInitialization -= value; }
1306 } 1306 }
1307 1307
1308 /// <summary> 1308 /// <summary>
1309 /// This event is fired when a thread is terminating. 1309 /// This event is fired when a thread is terminating.
1310 /// Use it for cleanup. 1310 /// Use it for cleanup.
1311 /// </summary> 1311 /// </summary>
1312 public event ThreadTerminationHandler OnThreadTermination 1312 public event ThreadTerminationHandler OnThreadTermination
1313 { 1313 {
1314 add { _onThreadTermination += value; } 1314 add { _onThreadTermination += value; }
1315 remove { _onThreadTermination -= value; } 1315 remove { _onThreadTermination -= value; }
1316 } 1316 }
1317 1317
1318 1318
1319 internal void CancelAbortWorkItemsGroup(WorkItemsGroup wig) 1319 internal void CancelAbortWorkItemsGroup(WorkItemsGroup wig)
1320 { 1320 {
1321 foreach (ThreadEntry threadEntry in _workerThreads.Values) 1321 foreach (ThreadEntry threadEntry in _workerThreads.Values)
1322 { 1322 {
1323 WorkItem workItem = threadEntry.CurrentWorkItem; 1323 WorkItem workItem = threadEntry.CurrentWorkItem;
1324 if (null != workItem && 1324 if (null != workItem &&
1325 workItem.WasQueuedBy(wig) && 1325 workItem.WasQueuedBy(wig) &&
1326 !workItem.IsCanceled) 1326 !workItem.IsCanceled)
1327 { 1327 {
1328 threadEntry.CurrentWorkItem.GetWorkItemResult().Cancel(true); 1328 threadEntry.CurrentWorkItem.GetWorkItemResult().Cancel(true);
1329 } 1329 }
1330 } 1330 }
1331 } 1331 }
1332 1332
1333 1333
1334 1334
1335 #endregion 1335 #endregion
1336 1336
1337 #region Properties 1337 #region Properties
1338 1338
1339 /// <summary> 1339 /// <summary>
1340 /// Get/Set the lower limit of threads in the pool. 1340 /// Get/Set the lower limit of threads in the pool.
1341 /// </summary> 1341 /// </summary>
1342 public int MinThreads 1342 public int MinThreads
1343 { 1343 {
1344 get 1344 get
1345 { 1345 {
1346 ValidateNotDisposed(); 1346 ValidateNotDisposed();
1347 return _stpStartInfo.MinWorkerThreads; 1347 return _stpStartInfo.MinWorkerThreads;
1348 } 1348 }
1349 set 1349 set
1350 { 1350 {
1351 Debug.Assert(value >= 0); 1351 Debug.Assert(value >= 0);
1352 Debug.Assert(value <= _stpStartInfo.MaxWorkerThreads); 1352 Debug.Assert(value <= _stpStartInfo.MaxWorkerThreads);
1353 if (_stpStartInfo.MaxWorkerThreads < value) 1353 if (_stpStartInfo.MaxWorkerThreads < value)
1354 { 1354 {
1355 _stpStartInfo.MaxWorkerThreads = value; 1355 _stpStartInfo.MaxWorkerThreads = value;
1356 } 1356 }
1357 _stpStartInfo.MinWorkerThreads = value; 1357 _stpStartInfo.MinWorkerThreads = value;
1358 StartOptimalNumberOfThreads(); 1358 StartOptimalNumberOfThreads();
1359 } 1359 }
1360 } 1360 }
1361 1361
1362 /// <summary> 1362 /// <summary>
1363 /// Get/Set the upper limit of threads in the pool. 1363 /// Get/Set the upper limit of threads in the pool.
1364 /// </summary> 1364 /// </summary>
1365 public int MaxThreads 1365 public int MaxThreads
1366 { 1366 {
1367 get 1367 get
1368 { 1368 {
1369 ValidateNotDisposed(); 1369 ValidateNotDisposed();
1370 return _stpStartInfo.MaxWorkerThreads; 1370 return _stpStartInfo.MaxWorkerThreads;
1371 } 1371 }
1372 1372
1373 set 1373 set
1374 { 1374 {
1375 Debug.Assert(value > 0); 1375 Debug.Assert(value > 0);
1376 Debug.Assert(value >= _stpStartInfo.MinWorkerThreads); 1376 Debug.Assert(value >= _stpStartInfo.MinWorkerThreads);
1377 if (_stpStartInfo.MinWorkerThreads > value) 1377 if (_stpStartInfo.MinWorkerThreads > value)
1378 { 1378 {
1379 _stpStartInfo.MinWorkerThreads = value; 1379 _stpStartInfo.MinWorkerThreads = value;
1380 } 1380 }
1381 _stpStartInfo.MaxWorkerThreads = value; 1381 _stpStartInfo.MaxWorkerThreads = value;
1382 StartOptimalNumberOfThreads(); 1382 StartOptimalNumberOfThreads();
1383 } 1383 }
1384 } 1384 }
1385 /// <summary> 1385 /// <summary>
1386 /// Get the number of threads in the thread pool. 1386 /// Get the number of threads in the thread pool.
1387 /// Should be between the lower and the upper limits. 1387 /// Should be between the lower and the upper limits.
1388 /// </summary> 1388 /// </summary>
1389 public int ActiveThreads 1389 public int ActiveThreads
1390 { 1390 {
1391 get 1391 get
1392 { 1392 {
1393 ValidateNotDisposed(); 1393 ValidateNotDisposed();
1394 return _workerThreads.Count; 1394 return _workerThreads.Count;
1395 } 1395 }
1396 } 1396 }
1397 1397
1398 /// <summary> 1398 /// <summary>
1399 /// Get the number of busy (not idle) threads in the thread pool. 1399 /// Get the number of busy (not idle) threads in the thread pool.
1400 /// </summary> 1400 /// </summary>
1401 public int InUseThreads 1401 public int InUseThreads
1402 { 1402 {
1403 get 1403 get
1404 { 1404 {
1405 ValidateNotDisposed(); 1405 ValidateNotDisposed();
1406 return _inUseWorkerThreads; 1406 return _inUseWorkerThreads;
1407 } 1407 }
1408 } 1408 }
1409 1409
1410 /// <summary> 1410 /// <summary>
1411 /// Returns true if the current running work item has been cancelled. 1411 /// Returns true if the current running work item has been cancelled.
1412 /// Must be used within the work item's callback method. 1412 /// Must be used within the work item's callback method.
1413 /// The work item should sample this value in order to know if it 1413 /// The work item should sample this value in order to know if it
1414 /// needs to quit before its completion. 1414 /// needs to quit before its completion.
1415 /// </summary> 1415 /// </summary>
1416 public static bool IsWorkItemCanceled 1416 public static bool IsWorkItemCanceled
1417 { 1417 {
1418 get 1418 get
1419 { 1419 {
1420 return CurrentThreadEntry.CurrentWorkItem.IsCanceled; 1420 return CurrentThreadEntry.CurrentWorkItem.IsCanceled;
1421 } 1421 }
1422 } 1422 }
1423 1423
1424 /// <summary> 1424 /// <summary>
1425 /// Checks if the work item has been cancelled, and if yes then abort the thread. 1425 /// Checks if the work item has been cancelled, and if yes then abort the thread.
1426 /// Can be used with Cancel and timeout 1426 /// Can be used with Cancel and timeout
1427 /// </summary> 1427 /// </summary>
1428 public static void AbortOnWorkItemCancel() 1428 public static void AbortOnWorkItemCancel()
1429 { 1429 {
1430 if (IsWorkItemCanceled) 1430 if (IsWorkItemCanceled)
1431 { 1431 {
1432 Thread.CurrentThread.Abort(); 1432 Thread.CurrentThread.Abort();
1433 } 1433 }
1434 } 1434 }
1435 1435
1436 /// <summary> 1436 /// <summary>
1437 /// Thread Pool start information (readonly) 1437 /// Thread Pool start information (readonly)
1438 /// </summary> 1438 /// </summary>
1439 public STPStartInfo STPStartInfo 1439 public STPStartInfo STPStartInfo
1440 { 1440 {
1441 get 1441 get
1442 { 1442 {
1443 return _stpStartInfo.AsReadOnly(); 1443 return _stpStartInfo.AsReadOnly();
1444 } 1444 }
1445 } 1445 }
1446 1446
1447 public bool IsShuttingdown 1447 public bool IsShuttingdown
1448 { 1448 {
1449 get { return _shutdown; } 1449 get { return _shutdown; }
1450 } 1450 }
1451 1451
1452 /// <summary> 1452 /// <summary>
1453 /// Return the local calculated performance counters 1453 /// Return the local calculated performance counters
1454 /// Available only if STPStartInfo.EnableLocalPerformanceCounters is true. 1454 /// Available only if STPStartInfo.EnableLocalPerformanceCounters is true.
1455 /// </summary> 1455 /// </summary>
1456 public ISTPPerformanceCountersReader PerformanceCountersReader 1456 public ISTPPerformanceCountersReader PerformanceCountersReader
1457 { 1457 {
1458 get { return (ISTPPerformanceCountersReader)_localPCs; } 1458 get { return (ISTPPerformanceCountersReader)_localPCs; }
1459 } 1459 }
1460 1460
1461 #endregion 1461 #endregion
1462 1462
1463 #region IDisposable Members 1463 #region IDisposable Members
1464 1464
1465 public void Dispose() 1465 public void Dispose()
1466 { 1466 {
1467 if (!_isDisposed) 1467 if (!_isDisposed)
1468 { 1468 {
1469 if (!_shutdown) 1469 if (!_shutdown)
1470 { 1470 {
1471 Shutdown(); 1471 Shutdown();
1472 } 1472 }
1473 1473
1474 if (null != _shuttingDownEvent) 1474 if (null != _shuttingDownEvent)
1475 { 1475 {
1476 _shuttingDownEvent.Close(); 1476 _shuttingDownEvent.Close();
1477 _shuttingDownEvent = null; 1477 _shuttingDownEvent = null;
1478 } 1478 }
1479 _workerThreads.Clear(); 1479 _workerThreads.Clear();
1480 1480
1481 if (null != _isIdleWaitHandle) 1481 if (null != _isIdleWaitHandle)
1482 { 1482 {
1483 _isIdleWaitHandle.Close(); 1483 _isIdleWaitHandle.Close();
1484 _isIdleWaitHandle = null; 1484 _isIdleWaitHandle = null;
1485 } 1485 }
1486 1486
1487 _isDisposed = true; 1487 _isDisposed = true;
1488 } 1488 }
1489 } 1489 }
1490 1490
1491 private void ValidateNotDisposed() 1491 private void ValidateNotDisposed()
1492 { 1492 {
1493 if(_isDisposed) 1493 if(_isDisposed)
1494 { 1494 {
1495 throw new ObjectDisposedException(GetType().ToString(), "The SmartThreadPool has been shutdown"); 1495 throw new ObjectDisposedException(GetType().ToString(), "The SmartThreadPool has been shutdown");
1496 } 1496 }
1497 } 1497 }
1498 #endregion 1498 #endregion
1499 1499
1500 #region WorkItemsGroupBase Overrides 1500 #region WorkItemsGroupBase Overrides
1501 1501
1502 /// <summary> 1502 /// <summary>
1503 /// Get/Set the maximum number of work items that execute cocurrency on the thread pool 1503 /// Get/Set the maximum number of work items that execute cocurrency on the thread pool
1504 /// </summary> 1504 /// </summary>
1505 public override int Concurrency 1505 public override int Concurrency
1506 { 1506 {
1507 get { return MaxThreads; } 1507 get { return MaxThreads; }
1508 set { MaxThreads = value; } 1508 set { MaxThreads = value; }
1509 } 1509 }
1510 1510
1511 /// <summary> 1511 /// <summary>
1512 /// Get the number of work items in the queue. 1512 /// Get the number of work items in the queue.
1513 /// </summary> 1513 /// </summary>
1514 public override int WaitingCallbacks 1514 public override int WaitingCallbacks
1515 { 1515 {
1516 get 1516 get
1517 { 1517 {
1518 ValidateNotDisposed(); 1518 ValidateNotDisposed();
1519 return _workItemsQueue.Count; 1519 return _workItemsQueue.Count;
1520 } 1520 }
1521 } 1521 }
1522 1522
1523 /// <summary> 1523 /// <summary>
1524 /// Get an array with all the state objects of the currently running items. 1524 /// Get an array with all the state objects of the currently running items.
1525 /// The array represents a snap shot and impact performance. 1525 /// The array represents a snap shot and impact performance.
1526 /// </summary> 1526 /// </summary>
1527 public override object[] GetStates() 1527 public override object[] GetStates()
1528 { 1528 {
1529 object[] states = _workItemsQueue.GetStates(); 1529 object[] states = _workItemsQueue.GetStates();
1530 return states; 1530 return states;
1531 } 1531 }
1532 1532
1533 /// <summary> 1533 /// <summary>
1534 /// WorkItemsGroup start information (readonly) 1534 /// WorkItemsGroup start information (readonly)
1535 /// </summary> 1535 /// </summary>
1536 public override WIGStartInfo WIGStartInfo 1536 public override WIGStartInfo WIGStartInfo
1537 { 1537 {
1538 get { return _stpStartInfo.AsReadOnly(); } 1538 get { return _stpStartInfo.AsReadOnly(); }
1539 } 1539 }
1540 1540
1541 /// <summary> 1541 /// <summary>
1542 /// Start the thread pool if it was started suspended. 1542 /// Start the thread pool if it was started suspended.
1543 /// If it is already running, this method is ignored. 1543 /// If it is already running, this method is ignored.
1544 /// </summary> 1544 /// </summary>
1545 public override void Start() 1545 public override void Start()
1546 { 1546 {
1547 if (!_isSuspended) 1547 if (!_isSuspended)
1548 { 1548 {
1549 return; 1549 return;
1550 } 1550 }
1551 _isSuspended = false; 1551 _isSuspended = false;
1552 1552
1553 ICollection workItemsGroups = _workItemsGroups.Values; 1553 ICollection workItemsGroups = _workItemsGroups.Values;
1554 foreach (WorkItemsGroup workItemsGroup in workItemsGroups) 1554 foreach (WorkItemsGroup workItemsGroup in workItemsGroups)
1555 { 1555 {
1556 workItemsGroup.OnSTPIsStarting(); 1556 workItemsGroup.OnSTPIsStarting();
1557 } 1557 }
1558 1558
1559 StartOptimalNumberOfThreads(); 1559 StartOptimalNumberOfThreads();
1560 } 1560 }
1561 1561
1562 /// <summary> 1562 /// <summary>
1563 /// Cancel all work items using thread abortion 1563 /// Cancel all work items using thread abortion
1564 /// </summary> 1564 /// </summary>
1565 /// <param name="abortExecution">True to stop work items by raising ThreadAbortException</param> 1565 /// <param name="abortExecution">True to stop work items by raising ThreadAbortException</param>
1566 public override void Cancel(bool abortExecution) 1566 public override void Cancel(bool abortExecution)
1567 { 1567 {
1568 _canceledSmartThreadPool.IsCanceled = true; 1568 _canceledSmartThreadPool.IsCanceled = true;
1569 _canceledSmartThreadPool = new CanceledWorkItemsGroup(); 1569 _canceledSmartThreadPool = new CanceledWorkItemsGroup();
1570 1570
1571 ICollection workItemsGroups = _workItemsGroups.Values; 1571 ICollection workItemsGroups = _workItemsGroups.Values;
1572 foreach (WorkItemsGroup workItemsGroup in workItemsGroups) 1572 foreach (WorkItemsGroup workItemsGroup in workItemsGroups)
1573 { 1573 {
1574 workItemsGroup.Cancel(abortExecution); 1574 workItemsGroup.Cancel(abortExecution);
1575 } 1575 }
1576 1576
1577 if (abortExecution) 1577 if (abortExecution)
1578 { 1578 {
1579 foreach (ThreadEntry threadEntry in _workerThreads.Values) 1579 foreach (ThreadEntry threadEntry in _workerThreads.Values)
1580 { 1580 {
1581 WorkItem workItem = threadEntry.CurrentWorkItem; 1581 WorkItem workItem = threadEntry.CurrentWorkItem;
1582 if (null != workItem && 1582 if (null != workItem &&
1583 threadEntry.AssociatedSmartThreadPool == this && 1583 threadEntry.AssociatedSmartThreadPool == this &&
1584 !workItem.IsCanceled) 1584 !workItem.IsCanceled)
1585 { 1585 {
1586 threadEntry.CurrentWorkItem.GetWorkItemResult().Cancel(true); 1586 threadEntry.CurrentWorkItem.GetWorkItemResult().Cancel(true);
1587 } 1587 }
1588 } 1588 }
1589 } 1589 }
1590 } 1590 }
1591 1591
1592 /// <summary> 1592 /// <summary>
1593 /// Wait for the thread pool to be idle 1593 /// Wait for the thread pool to be idle
1594 /// </summary> 1594 /// </summary>
1595 public override bool WaitForIdle(int millisecondsTimeout) 1595 public override bool WaitForIdle(int millisecondsTimeout)
1596 { 1596 {
1597 ValidateWaitForIdle(); 1597 ValidateWaitForIdle();
1598 return STPEventWaitHandle.WaitOne(_isIdleWaitHandle, millisecondsTimeout, false); 1598 return STPEventWaitHandle.WaitOne(_isIdleWaitHandle, millisecondsTimeout, false);
1599 } 1599 }
1600 1600
1601 /// <summary> 1601 /// <summary>
1602 /// This event is fired when all work items are completed. 1602 /// This event is fired when all work items are completed.
1603 /// (When IsIdle changes to true) 1603 /// (When IsIdle changes to true)
1604 /// This event only work on WorkItemsGroup. On SmartThreadPool 1604 /// This event only work on WorkItemsGroup. On SmartThreadPool
1605 /// it throws the NotImplementedException. 1605 /// it throws the NotImplementedException.
1606 /// </summary> 1606 /// </summary>
1607 public override event WorkItemsGroupIdleHandler OnIdle 1607 public override event WorkItemsGroupIdleHandler OnIdle
1608 { 1608 {
1609 add 1609 add
1610 { 1610 {
1611 throw new NotImplementedException("This event is not implemented in the SmartThreadPool class. Please create a WorkItemsGroup in order to use this feature."); 1611 throw new NotImplementedException("This event is not implemented in the SmartThreadPool class. Please create a WorkItemsGroup in order to use this feature.");
1612 //_onIdle += value; 1612 //_onIdle += value;
1613 } 1613 }
1614 remove 1614 remove
1615 { 1615 {
1616 throw new NotImplementedException("This event is not implemented in the SmartThreadPool class. Please create a WorkItemsGroup in order to use this feature."); 1616 throw new NotImplementedException("This event is not implemented in the SmartThreadPool class. Please create a WorkItemsGroup in order to use this feature.");
1617 //_onIdle -= value; 1617 //_onIdle -= value;
1618 } 1618 }
1619 } 1619 }
1620 1620
1621 internal override void PreQueueWorkItem() 1621 internal override void PreQueueWorkItem()
1622 { 1622 {
1623 ValidateNotDisposed(); 1623 ValidateNotDisposed();
1624 } 1624 }
1625 1625
1626 #endregion 1626 #endregion
1627 1627
1628 #region Join, Choice, Pipe, etc. 1628 #region Join, Choice, Pipe, etc.
1629 1629
1630 /// <summary> 1630 /// <summary>
1631 /// Executes all actions in parallel. 1631 /// Executes all actions in parallel.
1632 /// Returns when they all finish. 1632 /// Returns when they all finish.
1633 /// </summary> 1633 /// </summary>
1634 /// <param name="actions">Actions to execute</param> 1634 /// <param name="actions">Actions to execute</param>
1635 public void Join(IEnumerable<Action> actions) 1635 public void Join(IEnumerable<Action> actions)
1636 { 1636 {
1637 WIGStartInfo wigStartInfo = new WIGStartInfo { StartSuspended = true }; 1637 WIGStartInfo wigStartInfo = new WIGStartInfo { StartSuspended = true };
1638 IWorkItemsGroup workItemsGroup = CreateWorkItemsGroup(int.MaxValue, wigStartInfo); 1638 IWorkItemsGroup workItemsGroup = CreateWorkItemsGroup(int.MaxValue, wigStartInfo);
1639 foreach (Action action in actions) 1639 foreach (Action action in actions)
1640 { 1640 {
1641 workItemsGroup.QueueWorkItem(action); 1641 workItemsGroup.QueueWorkItem(action);
1642 } 1642 }
1643 workItemsGroup.Start(); 1643 workItemsGroup.Start();
1644 workItemsGroup.WaitForIdle(); 1644 workItemsGroup.WaitForIdle();
1645 } 1645 }
1646 1646
1647 /// <summary> 1647 /// <summary>
1648 /// Executes all actions in parallel. 1648 /// Executes all actions in parallel.
1649 /// Returns when they all finish. 1649 /// Returns when they all finish.
1650 /// </summary> 1650 /// </summary>
1651 /// <param name="actions">Actions to execute</param> 1651 /// <param name="actions">Actions to execute</param>
1652 public void Join(params Action[] actions) 1652 public void Join(params Action[] actions)
1653 { 1653 {
1654 Join((IEnumerable<Action>)actions); 1654 Join((IEnumerable<Action>)actions);
1655 } 1655 }
1656 1656
1657 private class ChoiceIndex 1657 private class ChoiceIndex
1658 { 1658 {
1659 public int _index = -1; 1659 public int _index = -1;
1660 } 1660 }
1661 1661
1662 /// <summary> 1662 /// <summary>
1663 /// Executes all actions in parallel 1663 /// Executes all actions in parallel
1664 /// Returns when the first one completes 1664 /// Returns when the first one completes
1665 /// </summary> 1665 /// </summary>
1666 /// <param name="actions">Actions to execute</param> 1666 /// <param name="actions">Actions to execute</param>
1667 public int Choice(IEnumerable<Action> actions) 1667 public int Choice(IEnumerable<Action> actions)
1668 { 1668 {
1669 WIGStartInfo wigStartInfo = new WIGStartInfo { StartSuspended = true }; 1669 WIGStartInfo wigStartInfo = new WIGStartInfo { StartSuspended = true };
1670 IWorkItemsGroup workItemsGroup = CreateWorkItemsGroup(int.MaxValue, wigStartInfo); 1670 IWorkItemsGroup workItemsGroup = CreateWorkItemsGroup(int.MaxValue, wigStartInfo);
1671 1671
1672 ManualResetEvent anActionCompleted = new ManualResetEvent(false); 1672 ManualResetEvent anActionCompleted = new ManualResetEvent(false);
1673 1673
1674 ChoiceIndex choiceIndex = new ChoiceIndex(); 1674 ChoiceIndex choiceIndex = new ChoiceIndex();
1675 1675
1676 int i = 0; 1676 int i = 0;
1677 foreach (Action action in actions) 1677 foreach (Action action in actions)
1678 { 1678 {
1679 Action act = action; 1679 Action act = action;
1680 int value = i; 1680 int value = i;
1681 workItemsGroup.QueueWorkItem(() => { act(); Interlocked.CompareExchange(ref choiceIndex._index, value, -1); anActionCompleted.Set(); }); 1681 workItemsGroup.QueueWorkItem(() => { act(); Interlocked.CompareExchange(ref choiceIndex._index, value, -1); anActionCompleted.Set(); });
1682 ++i; 1682 ++i;
1683 } 1683 }
1684 workItemsGroup.Start(); 1684 workItemsGroup.Start();
1685 anActionCompleted.WaitOne(); 1685 anActionCompleted.WaitOne();
1686 1686
1687 return choiceIndex._index; 1687 return choiceIndex._index;
1688 } 1688 }
1689 1689
1690 /// <summary> 1690 /// <summary>
1691 /// Executes all actions in parallel 1691 /// Executes all actions in parallel
1692 /// Returns when the first one completes 1692 /// Returns when the first one completes
1693 /// </summary> 1693 /// </summary>
1694 /// <param name="actions">Actions to execute</param> 1694 /// <param name="actions">Actions to execute</param>
1695 public int Choice(params Action[] actions) 1695 public int Choice(params Action[] actions)
1696 { 1696 {
1697 return Choice((IEnumerable<Action>)actions); 1697 return Choice((IEnumerable<Action>)actions);
1698 } 1698 }
1699 1699
1700 /// <summary> 1700 /// <summary>
1701 /// Executes actions in sequence asynchronously. 1701 /// Executes actions in sequence asynchronously.
1702 /// Returns immediately. 1702 /// Returns immediately.
1703 /// </summary> 1703 /// </summary>
1704 /// <param name="pipeState">A state context that passes </param> 1704 /// <param name="pipeState">A state context that passes </param>
1705 /// <param name="actions">Actions to execute in the order they should run</param> 1705 /// <param name="actions">Actions to execute in the order they should run</param>
1706 public void Pipe<T>(T pipeState, IEnumerable<Action<T>> actions) 1706 public void Pipe<T>(T pipeState, IEnumerable<Action<T>> actions)
1707 { 1707 {
1708 WIGStartInfo wigStartInfo = new WIGStartInfo { StartSuspended = true }; 1708 WIGStartInfo wigStartInfo = new WIGStartInfo { StartSuspended = true };
1709 IWorkItemsGroup workItemsGroup = CreateWorkItemsGroup(1, wigStartInfo); 1709 IWorkItemsGroup workItemsGroup = CreateWorkItemsGroup(1, wigStartInfo);
1710 foreach (Action<T> action in actions) 1710 foreach (Action<T> action in actions)
1711 { 1711 {
1712 Action<T> act = action; 1712 Action<T> act = action;
1713 workItemsGroup.QueueWorkItem(() => act(pipeState)); 1713 workItemsGroup.QueueWorkItem(() => act(pipeState));
1714 } 1714 }
1715 workItemsGroup.Start(); 1715 workItemsGroup.Start();
1716 workItemsGroup.WaitForIdle(); 1716 workItemsGroup.WaitForIdle();
1717 } 1717 }
1718 1718
1719 /// <summary> 1719 /// <summary>
1720 /// Executes actions in sequence asynchronously. 1720 /// Executes actions in sequence asynchronously.
1721 /// Returns immediately. 1721 /// Returns immediately.
1722 /// </summary> 1722 /// </summary>
1723 /// <param name="pipeState"></param> 1723 /// <param name="pipeState"></param>
1724 /// <param name="actions">Actions to execute in the order they should run</param> 1724 /// <param name="actions">Actions to execute in the order they should run</param>
1725 public void Pipe<T>(T pipeState, params Action<T>[] actions) 1725 public void Pipe<T>(T pipeState, params Action<T>[] actions)
1726 { 1726 {
1727 Pipe(pipeState, (IEnumerable<Action<T>>)actions); 1727 Pipe(pipeState, (IEnumerable<Action<T>>)actions);
1728 } 1728 }
1729 #endregion 1729 #endregion
1730 } 1730 }
1731 #endregion 1731 #endregion
1732} 1732}
generated by cgit v1.1 at 2024-12-14 05:30:53 +0000