/source/library/Interlace/Threads/WorkerThreadPool.cs
C# | 110 lines | 61 code | 21 blank | 28 comment | 3 complexity | 6844c229851b5facc6f0b75be7d6414c MD5 | raw file
- #region Using Directives and Copyright Notice
-
- // Copyright (c) 2007-2010, Computer Consultancy Pty Ltd
- // All rights reserved.
- //
- // Redistribution and use in source and binary forms, with or without
- // modification, are permitted provided that the following conditions are met:
- // * Redistributions of source code must retain the above copyright
- // notice, this list of conditions and the following disclaimer.
- // * Redistributions in binary form must reproduce the above copyright
- // notice, this list of conditions and the following disclaimer in the
- // documentation and/or other materials provided with the distribution.
- // * Neither the name of the Computer Consultancy Pty Ltd nor the
- // names of its contributors may be used to endorse or promote products
- // derived from this software without specific prior written permission.
- //
- // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- // ARE DISCLAIMED. IN NO EVENT SHALL COMPUTER CONSULTANCY PTY LTD BE LIABLE
- // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- // LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- // OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
- // DAMAGE.
-
- using System;
- using System.Collections.Generic;
- using System.Text;
- using System.Threading;
-
- using Interlace.Logging;
-
- #endregion
-
- namespace Interlace.Threads
- {
- public delegate WorkerThread CreateWorkerThreadDelegate();
-
- public class WorkerThreadPool
- {
- private SynchronisedQueue _readyQueue;
- private CreateWorkerThreadDelegate _workerConstructor;
-
- private List<WorkerThread> _workerThreads = new List<WorkerThread>();
-
- private bool _running;
-
- public WorkerThreadPool(CreateWorkerThreadDelegate workerConstructor, int poolSize)
- {
- _workerConstructor = workerConstructor;
-
- _readyQueue = new SynchronisedQueue(poolSize);
-
- for (int i = 0; i <= poolSize - 1; i++)
- {
- CreateWorker();
- }
-
- _running = true;
- }
-
- public void QueueRequest(object request)
- {
- if (!_running)
- {
- throw new InvalidOperationException("A request can not be queued once the " +
- "thread pool has been shut down.");
- }
-
- WorkerThread thread = (WorkerThread)_readyQueue.Dequeue(Timeout.Infinite);
-
- thread.AcceptRequest(request);
- }
-
- /// <summary>
- /// Shuts down the pool of workers. A pool instance becomes unusable once it is shut down.
- /// </summary>
- public void Shutdown()
- {
- if (_running)
- {
- _running = false;
-
- foreach (WorkerThread thread in _workerThreads)
- {
- thread.Shutdown();
- }
- }
- }
-
- private void CreateWorker()
- {
- WorkerThread worker = _workerConstructor();
-
- _readyQueue.Enqueue(worker, Timeout.Infinite);
- _workerThreads.Add(worker);
-
- worker.Attach(this);
- worker.CreateThread();
- }
-
- internal void RequestCompleted(WorkerThread worker)
- {
- _readyQueue.Enqueue(worker, Timeout.Infinite);
- }
- }
- }