Smart Thread Pool

using System;
using System.Threading;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

using Amib.Threading;

namespace TestSmartThreadPool
{
	/// <summary>
	/// Summary description for Form1.
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{
		private System.Windows.Forms.Button btnStart;
		private System.Windows.Forms.Button btnStop;
		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.Label label3;
		private System.Windows.Forms.Label label4;
		private System.Windows.Forms.Label label2;
		private System.Windows.Forms.Label label5;
		private System.Windows.Forms.Label lblThreadInUse;
		private System.Windows.Forms.Label label7;
		private System.Windows.Forms.NumericUpDown spinIdleTimeout;
		private System.Windows.Forms.NumericUpDown spinMaxThreads;
		private System.Windows.Forms.NumericUpDown spinMinThreads;
		private System.Windows.Forms.NumericUpDown spinInterval;
		private System.Windows.Forms.Timer timerPoll;
		private System.ComponentModel.IContainer components;
		private System.Windows.Forms.Label lblThreadsInPool;
		private System.Windows.Forms.Label label6;
		private System.Windows.Forms.NumericUpDown spinConsumingTime;

		private SmartThreadPool _smartThreadPool;
		private IWorkItemsGroup _workItemsGroup;
		private System.Windows.Forms.Label lblWaitingCallbacks;
		private System.Windows.Forms.Label label9;
		private System.Windows.Forms.Label label8;
		private System.Windows.Forms.Label lblWorkItemsGenerated;
		private bool running;
		private long workItemsGenerated;
		private System.Windows.Forms.Label label10;
		private System.Windows.Forms.Label lblWorkItemsCompleted;
		private UsageControl.UsageControl usageThreadsInPool;
		private System.Windows.Forms.GroupBox groupBox2;
		private System.Windows.Forms.GroupBox groupBox3;
		private System.Windows.Forms.GroupBox groupBox1;
		private System.Windows.Forms.GroupBox groupBox4;
		private UsageControl.UsageHistoryControl usageHistorySTP;
		private System.Diagnostics.PerformanceCounter pcActiveThreads;
		private System.Diagnostics.PerformanceCounter pcInUseThreads;
		private System.Diagnostics.PerformanceCounter pcQueuedWorkItems;
		private System.Diagnostics.PerformanceCounter pcCompletedWorkItems;
		private long workItemsCompleted;

		public Form1()
		{
			//
			// Required for Windows Form Designer support
			//
			InitializeComponent();
		}

		/// <summary>
		/// Clean up any resources being used.
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (components != null) 
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows Form Designer generated code
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{
			this.components = new System.ComponentModel.Container();
			System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(Form1));
			this.btnStart = new System.Windows.Forms.Button();
			this.btnStop = new System.Windows.Forms.Button();
			this.label1 = new System.Windows.Forms.Label();
			this.label3 = new System.Windows.Forms.Label();
			this.label4 = new System.Windows.Forms.Label();
			this.label2 = new System.Windows.Forms.Label();
			this.lblThreadsInPool = new System.Windows.Forms.Label();
			this.label5 = new System.Windows.Forms.Label();
			this.spinIdleTimeout = new System.Windows.Forms.NumericUpDown();
			this.spinMaxThreads = new System.Windows.Forms.NumericUpDown();
			this.spinMinThreads = new System.Windows.Forms.NumericUpDown();
			this.spinInterval = new System.Windows.Forms.NumericUpDown();
			this.lblThreadInUse = new System.Windows.Forms.Label();
			this.label7 = new System.Windows.Forms.Label();
			this.timerPoll = new System.Windows.Forms.Timer(this.components);
			this.spinConsumingTime = new System.Windows.Forms.NumericUpDown();
			this.label6 = new System.Windows.Forms.Label();
			this.lblWaitingCallbacks = new System.Windows.Forms.Label();
			this.label9 = new System.Windows.Forms.Label();
			this.label8 = new System.Windows.Forms.Label();
			this.label10 = new System.Windows.Forms.Label();
			this.lblWorkItemsGenerated = new System.Windows.Forms.Label();
			this.lblWorkItemsCompleted = new System.Windows.Forms.Label();
			this.groupBox2 = new System.Windows.Forms.GroupBox();
			this.groupBox3 = new System.Windows.Forms.GroupBox();
			this.groupBox1 = new System.Windows.Forms.GroupBox();
			this.usageThreadsInPool = new UsageControl.UsageControl();
			this.groupBox4 = new System.Windows.Forms.GroupBox();
			this.usageHistorySTP = new UsageControl.UsageHistoryControl();
			this.pcActiveThreads = new System.Diagnostics.PerformanceCounter();
			this.pcInUseThreads = new System.Diagnostics.PerformanceCounter();
			this.pcQueuedWorkItems = new System.Diagnostics.PerformanceCounter();
			this.pcCompletedWorkItems = new System.Diagnostics.PerformanceCounter();
			((System.ComponentModel.ISupportInitialize)(this.spinIdleTimeout)).BeginInit();
			((System.ComponentModel.ISupportInitialize)(this.spinMaxThreads)).BeginInit();
			((System.ComponentModel.ISupportInitialize)(this.spinMinThreads)).BeginInit();
			((System.ComponentModel.ISupportInitialize)(this.spinInterval)).BeginInit();
			((System.ComponentModel.ISupportInitialize)(this.spinConsumingTime)).BeginInit();
			this.groupBox2.SuspendLayout();
			this.groupBox3.SuspendLayout();
			this.groupBox1.SuspendLayout();
			this.groupBox4.SuspendLayout();
			((System.ComponentModel.ISupportInitialize)(this.pcActiveThreads)).BeginInit();
			((System.ComponentModel.ISupportInitialize)(this.pcInUseThreads)).BeginInit();
			((System.ComponentModel.ISupportInitialize)(this.pcQueuedWorkItems)).BeginInit();
			((System.ComponentModel.ISupportInitialize)(this.pcCompletedWorkItems)).BeginInit();
			this.SuspendLayout();
			// 
			// btnStart
			// 
			this.btnStart.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right)));
			this.btnStart.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.btnStart.Location = new System.Drawing.Point(432, 352);
			this.btnStart.Name = "btnStart";
			this.btnStart.Size = new System.Drawing.Size(72, 24);
			this.btnStart.TabIndex = 0;
			this.btnStart.Text = "Start";
			this.btnStart.Click += new System.EventHandler(this.btnStart_Click);
			// 
			// btnStop
			// 
			this.btnStop.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right)));
			this.btnStop.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.btnStop.Location = new System.Drawing.Point(520, 352);
			this.btnStop.Name = "btnStop";
			this.btnStop.Size = new System.Drawing.Size(72, 24);
			this.btnStop.TabIndex = 1;
			this.btnStop.Text = "Stop";
			this.btnStop.Click += new System.EventHandler(this.btnStop_Click);
			// 
			// label1
			// 
			this.label1.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left)));
			this.label1.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.label1.Location = new System.Drawing.Point(104, 256);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(104, 24);
			this.label1.TabIndex = 2;
			this.label1.Text = "Minimum Threads";
			this.label1.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
			// 
			// label3
			// 
			this.label3.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left)));
			this.label3.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.label3.Location = new System.Drawing.Point(104, 288);
			this.label3.Name = "label3";
			this.label3.Size = new System.Drawing.Size(104, 24);
			this.label3.TabIndex = 4;
			this.label3.Text = "Maximum Threads";
			this.label3.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
			// 
			// label4
			// 
			this.label4.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left)));
			this.label4.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.label4.Location = new System.Drawing.Point(104, 320);
			this.label4.Name = "label4";
			this.label4.Size = new System.Drawing.Size(120, 24);
			this.label4.TabIndex = 5;
			this.label4.Text = "Idle timeout (Seconds)";
			this.label4.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
			// 
			// label2
			// 
			this.label2.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.label2.Location = new System.Drawing.Point(8, 16);
			this.label2.Name = "label2";
			this.label2.Size = new System.Drawing.Size(72, 24);
			this.label2.TabIndex = 3;
			this.label2.Text = "In pool (Red)";
			this.label2.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
			// 
			// lblThreadsInPool
			// 
			this.lblThreadsInPool.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.lblThreadsInPool.Location = new System.Drawing.Point(80, 16);
			this.lblThreadsInPool.Name = "lblThreadsInPool";
			this.lblThreadsInPool.Size = new System.Drawing.Size(80, 24);
			this.lblThreadsInPool.TabIndex = 11;
			this.lblThreadsInPool.Text = "XXXXXXXXX";
			this.lblThreadsInPool.TextAlign = System.Drawing.ContentAlignment.MiddleRight;
			// 
			// label5
			// 
			this.label5.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left)));
			this.label5.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.label5.Location = new System.Drawing.Point(336, 258);
			this.label5.Name = "label5";
			this.label5.Size = new System.Drawing.Size(280, 24);
			this.label5.TabIndex = 12;
			this.label5.Text = "Interval between work item production (milliseconds)";
			this.label5.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
			// 
			// spinIdleTimeout
			// 
			this.spinIdleTimeout.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left)));
			this.spinIdleTimeout.Font = new System.Drawing.Font("Microsoft Sans Serif", 14.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.spinIdleTimeout.Location = new System.Drawing.Point(8, 320);
			this.spinIdleTimeout.Minimum = new System.Decimal(new int[] {
																			1,
																			0,
																			0,
																			0});
			this.spinIdleTimeout.Name = "spinIdleTimeout";
			this.spinIdleTimeout.Size = new System.Drawing.Size(88, 29);
			this.spinIdleTimeout.TabIndex = 15;
			this.spinIdleTimeout.TextAlign = System.Windows.Forms.HorizontalAlignment.Center;
			this.spinIdleTimeout.Value = new System.Decimal(new int[] {
																		  10,
																		  0,
																		  0,
																		  0});
			// 
			// spinMaxThreads
			// 
			this.spinMaxThreads.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left)));
			this.spinMaxThreads.Font = new System.Drawing.Font("Microsoft Sans Serif", 14.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.spinMaxThreads.Location = new System.Drawing.Point(8, 288);
			this.spinMaxThreads.Minimum = new System.Decimal(new int[] {
																		   1,
																		   0,
																		   0,
																		   0});
			this.spinMaxThreads.Name = "spinMaxThreads";
			this.spinMaxThreads.Size = new System.Drawing.Size(88, 29);
			this.spinMaxThreads.TabIndex = 14;
			this.spinMaxThreads.TextAlign = System.Windows.Forms.HorizontalAlignment.Center;
			this.spinMaxThreads.Value = new System.Decimal(new int[] {
																		 10,
																		 0,
																		 0,
																		 0});
			this.spinMaxThreads.ValueChanged += new System.EventHandler(this.spinMaxThreads_ValueChanged);
			// 
			// spinMinThreads
			// 
			this.spinMinThreads.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left)));
			this.spinMinThreads.Font = new System.Drawing.Font("Microsoft Sans Serif", 14.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.spinMinThreads.Location = new System.Drawing.Point(8, 256);
			this.spinMinThreads.Name = "spinMinThreads";
			this.spinMinThreads.Size = new System.Drawing.Size(88, 29);
			this.spinMinThreads.TabIndex = 13;
			this.spinMinThreads.TextAlign = System.Windows.Forms.HorizontalAlignment.Center;
			this.spinMinThreads.ValueChanged += new System.EventHandler(this.spinMinThreads_ValueChanged);
			// 
			// spinInterval
			// 
			this.spinInterval.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left)));
			this.spinInterval.Font = new System.Drawing.Font("Microsoft Sans Serif", 14.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.spinInterval.Increment = new System.Decimal(new int[] {
																		   100,
																		   0,
																		   0,
																		   0});
			this.spinInterval.Location = new System.Drawing.Point(240, 256);
			this.spinInterval.Maximum = new System.Decimal(new int[] {
																		 100000,
																		 0,
																		 0,
																		 0});
			this.spinInterval.Name = "spinInterval";
			this.spinInterval.Size = new System.Drawing.Size(88, 29);
			this.spinInterval.TabIndex = 16;
			this.spinInterval.TextAlign = System.Windows.Forms.HorizontalAlignment.Center;
			this.spinInterval.Value = new System.Decimal(new int[] {
																	   100,
																	   0,
																	   0,
																	   0});
			// 
			// lblThreadInUse
			// 
			this.lblThreadInUse.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.lblThreadInUse.Location = new System.Drawing.Point(80, 40);
			this.lblThreadInUse.Name = "lblThreadInUse";
			this.lblThreadInUse.Size = new System.Drawing.Size(80, 24);
			this.lblThreadInUse.TabIndex = 18;
			this.lblThreadInUse.Text = "XXXXXXXXX";
			this.lblThreadInUse.TextAlign = System.Drawing.ContentAlignment.MiddleRight;
			// 
			// label7
			// 
			this.label7.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.label7.Location = new System.Drawing.Point(8, 40);
			this.label7.Name = "label7";
			this.label7.Size = new System.Drawing.Size(80, 24);
			this.label7.TabIndex = 17;
			this.label7.Text = "Used (Green)";
			this.label7.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
			// 
			// timerPoll
			// 
			this.timerPoll.Interval = 500;
			this.timerPoll.Tick += new System.EventHandler(this.timer1_Tick);
			// 
			// spinConsumingTime
			// 
			this.spinConsumingTime.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left)));
			this.spinConsumingTime.Font = new System.Drawing.Font("Microsoft Sans Serif", 14.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.spinConsumingTime.Increment = new System.Decimal(new int[] {
																				100,
																				0,
																				0,
																				0});
			this.spinConsumingTime.Location = new System.Drawing.Point(240, 288);
			this.spinConsumingTime.Maximum = new System.Decimal(new int[] {
																			  100000,
																			  0,
																			  0,
																			  0});
			this.spinConsumingTime.Name = "spinConsumingTime";
			this.spinConsumingTime.Size = new System.Drawing.Size(88, 29);
			this.spinConsumingTime.TabIndex = 20;
			this.spinConsumingTime.TextAlign = System.Windows.Forms.HorizontalAlignment.Center;
			this.spinConsumingTime.Value = new System.Decimal(new int[] {
																			100,
																			0,
																			0,
																			0});
			// 
			// label6
			// 
			this.label6.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left)));
			this.label6.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.label6.Location = new System.Drawing.Point(336, 290);
			this.label6.Name = "label6";
			this.label6.Size = new System.Drawing.Size(216, 24);
			this.label6.TabIndex = 19;
			this.label6.Text = "Work item consuming time (milliseconds)";
			this.label6.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
			// 
			// lblWaitingCallbacks
			// 
			this.lblWaitingCallbacks.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.lblWaitingCallbacks.Location = new System.Drawing.Point(64, 16);
			this.lblWaitingCallbacks.Name = "lblWaitingCallbacks";
			this.lblWaitingCallbacks.Size = new System.Drawing.Size(80, 24);
			this.lblWaitingCallbacks.TabIndex = 22;
			this.lblWaitingCallbacks.Text = "XXXXXXXXX";
			this.lblWaitingCallbacks.TextAlign = System.Drawing.ContentAlignment.MiddleRight;
			// 
			// label9
			// 
			this.label9.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.label9.Location = new System.Drawing.Point(8, 16);
			this.label9.Name = "label9";
			this.label9.Size = new System.Drawing.Size(48, 24);
			this.label9.TabIndex = 21;
			this.label9.Text = "Queued";
			this.label9.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
			// 
			// label8
			// 
			this.label8.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.label8.Location = new System.Drawing.Point(8, 40);
			this.label8.Name = "label8";
			this.label8.Size = new System.Drawing.Size(64, 24);
			this.label8.TabIndex = 25;
			this.label8.Text = "Generated";
			this.label8.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
			// 
			// label10
			// 
			this.label10.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.label10.Location = new System.Drawing.Point(8, 64);
			this.label10.Name = "label10";
			this.label10.Size = new System.Drawing.Size(64, 24);
			this.label10.TabIndex = 26;
			this.label10.Text = "Completed";
			this.label10.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
			// 
			// lblWorkItemsGenerated
			// 
			this.lblWorkItemsGenerated.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.lblWorkItemsGenerated.Location = new System.Drawing.Point(64, 40);
			this.lblWorkItemsGenerated.Name = "lblWorkItemsGenerated";
			this.lblWorkItemsGenerated.Size = new System.Drawing.Size(80, 24);
			this.lblWorkItemsGenerated.TabIndex = 27;
			this.lblWorkItemsGenerated.Text = "XXXXXXXXX";
			this.lblWorkItemsGenerated.TextAlign = System.Drawing.ContentAlignment.MiddleRight;
			// 
			// lblWorkItemsCompleted
			// 
			this.lblWorkItemsCompleted.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.lblWorkItemsCompleted.Location = new System.Drawing.Point(64, 64);
			this.lblWorkItemsCompleted.Name = "lblWorkItemsCompleted";
			this.lblWorkItemsCompleted.Size = new System.Drawing.Size(80, 24);
			this.lblWorkItemsCompleted.TabIndex = 28;
			this.lblWorkItemsCompleted.Text = "XXXXXXXXX";
			this.lblWorkItemsCompleted.TextAlign = System.Drawing.ContentAlignment.MiddleRight;
			// 
			// groupBox2
			// 
			this.groupBox2.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left)));
			this.groupBox2.Controls.Add(this.lblWaitingCallbacks);
			this.groupBox2.Controls.Add(this.label9);
			this.groupBox2.Controls.Add(this.label8);
			this.groupBox2.Controls.Add(this.label10);
			this.groupBox2.Controls.Add(this.lblWorkItemsGenerated);
			this.groupBox2.Controls.Add(this.lblWorkItemsCompleted);
			this.groupBox2.Location = new System.Drawing.Point(8, 144);
			this.groupBox2.Name = "groupBox2";
			this.groupBox2.Size = new System.Drawing.Size(152, 96);
			this.groupBox2.TabIndex = 33;
			this.groupBox2.TabStop = false;
			this.groupBox2.Text = "Work items";
			// 
			// groupBox3
			// 
			this.groupBox3.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left)));
			this.groupBox3.Controls.Add(this.lblThreadInUse);
			this.groupBox3.Controls.Add(this.label7);
			this.groupBox3.Controls.Add(this.lblThreadsInPool);
			this.groupBox3.Controls.Add(this.label2);
			this.groupBox3.Location = new System.Drawing.Point(176, 144);
			this.groupBox3.Name = "groupBox3";
			this.groupBox3.Size = new System.Drawing.Size(168, 72);
			this.groupBox3.TabIndex = 34;
			this.groupBox3.TabStop = false;
			this.groupBox3.Text = "Threads";
			// 
			// groupBox1
			// 
			this.groupBox1.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
				| System.Windows.Forms.AnchorStyles.Left)));
			this.groupBox1.Controls.Add(this.usageThreadsInPool);
			this.groupBox1.Location = new System.Drawing.Point(8, 8);
			this.groupBox1.Name = "groupBox1";
			this.groupBox1.Size = new System.Drawing.Size(80, 128);
			this.groupBox1.TabIndex = 35;
			this.groupBox1.TabStop = false;
			this.groupBox1.Text = "STP Usage";
			// 
			// usageThreadsInPool
			// 
			this.usageThreadsInPool.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
				| System.Windows.Forms.AnchorStyles.Left) 
				| System.Windows.Forms.AnchorStyles.Right)));
			this.usageThreadsInPool.BackColor = System.Drawing.Color.Black;
			this.usageThreadsInPool.Location = new System.Drawing.Point(20, 16);
			this.usageThreadsInPool.Maximum = 25;
			this.usageThreadsInPool.Name = "usageThreadsInPool";
			this.usageThreadsInPool.Size = new System.Drawing.Size(41, 104);
			this.usageThreadsInPool.TabIndex = 37;
			this.usageThreadsInPool.Value1 = 1;
			this.usageThreadsInPool.Value2 = 24;
			// 
			// groupBox4
			// 
			this.groupBox4.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
				| System.Windows.Forms.AnchorStyles.Left) 
				| System.Windows.Forms.AnchorStyles.Right)));
			this.groupBox4.Controls.Add(this.usageHistorySTP);
			this.groupBox4.Location = new System.Drawing.Point(104, 8);
			this.groupBox4.Name = "groupBox4";
			this.groupBox4.Size = new System.Drawing.Size(494, 128);
			this.groupBox4.TabIndex = 36;
			this.groupBox4.TabStop = false;
			this.groupBox4.Text = "STP Usage History";
			// 
			// usageHistorySTP
			// 
			this.usageHistorySTP.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
				| System.Windows.Forms.AnchorStyles.Left) 
				| System.Windows.Forms.AnchorStyles.Right)));
			this.usageHistorySTP.BackColor = System.Drawing.Color.Black;
			this.usageHistorySTP.Location = new System.Drawing.Point(8, 16);
			this.usageHistorySTP.Maximum = 100;
			this.usageHistorySTP.Name = "usageHistorySTP";
			this.usageHistorySTP.Size = new System.Drawing.Size(480, 104);
			this.usageHistorySTP.TabIndex = 0;
			// 
			// pcActiveThreads
			// 
			this.pcActiveThreads.CategoryName = "SmartThreadPool";
			this.pcActiveThreads.CounterName = "Active threads";
			this.pcActiveThreads.InstanceName = "Test SmartThreadPool";
			// 
			// pcInUseThreads
			// 
			this.pcInUseThreads.CategoryName = "SmartThreadPool";
			this.pcInUseThreads.CounterName = "In use threads";
			this.pcInUseThreads.InstanceName = "Test SmartThreadPool";
			// 
			// pcQueuedWorkItems
			// 
			this.pcQueuedWorkItems.CategoryName = "SmartThreadPool";
			this.pcQueuedWorkItems.CounterName = "Work Items in queue";
			this.pcQueuedWorkItems.InstanceName = "Test SmartThreadPool";
			// 
			// pcCompletedWorkItems
			// 
			this.pcCompletedWorkItems.CategoryName = "SmartThreadPool";
			this.pcCompletedWorkItems.CounterName = "Work Items processed";
			this.pcCompletedWorkItems.InstanceName = "Test SmartThreadPool";
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
			this.ClientSize = new System.Drawing.Size(608, 382);
			this.Controls.Add(this.groupBox4);
			this.Controls.Add(this.groupBox1);
			this.Controls.Add(this.groupBox2);
			this.Controls.Add(this.groupBox3);
			this.Controls.Add(this.spinConsumingTime);
			this.Controls.Add(this.label6);
			this.Controls.Add(this.spinInterval);
			this.Controls.Add(this.spinIdleTimeout);
			this.Controls.Add(this.spinMaxThreads);
			this.Controls.Add(this.spinMinThreads);
			this.Controls.Add(this.label5);
			this.Controls.Add(this.label4);
			this.Controls.Add(this.label3);
			this.Controls.Add(this.label1);
			this.Controls.Add(this.btnStop);
			this.Controls.Add(this.btnStart);
			this.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.Icon = ((System.Drawing.Icon)(resources.GetObject("$this.Icon")));
			this.MinimumSize = new System.Drawing.Size(616, 416);
			this.Name = "Form1";
			this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
			this.Text = "Test Smart Thread Pool";
			this.Closing += new System.ComponentModel.CancelEventHandler(this.Form1_Closing);
			this.Load += new System.EventHandler(this.Form1_Load);
			((System.ComponentModel.ISupportInitialize)(this.spinIdleTimeout)).EndInit();
			((System.ComponentModel.ISupportInitialize)(this.spinMaxThreads)).EndInit();
			((System.ComponentModel.ISupportInitialize)(this.spinMinThreads)).EndInit();
			((System.ComponentModel.ISupportInitialize)(this.spinInterval)).EndInit();
			((System.ComponentModel.ISupportInitialize)(this.spinConsumingTime)).EndInit();
			this.groupBox2.ResumeLayout(false);
			this.groupBox3.ResumeLayout(false);
			this.groupBox1.ResumeLayout(false);
			this.groupBox4.ResumeLayout(false);
			((System.ComponentModel.ISupportInitialize)(this.pcActiveThreads)).EndInit();
			((System.ComponentModel.ISupportInitialize)(this.pcInUseThreads)).EndInit();
			((System.ComponentModel.ISupportInitialize)(this.pcQueuedWorkItems)).EndInit();
			((System.ComponentModel.ISupportInitialize)(this.pcCompletedWorkItems)).EndInit();
			this.ResumeLayout(false);

		}
		#endregion

		/// <summary>
		/// The main entry point for the application.
		/// </summary>
		[STAThread]
		static void Main() 
		{
			Application.Run(new Form1());
		}
		private Thread workItemsProducerThread;

		private void btnStart_Click(object sender, System.EventArgs e)
		{
			UpdateControls(true);
			workItemsCompleted = 0;
			workItemsGenerated = 0;

			STPStartInfo stpStartInfo = new STPStartInfo();
			stpStartInfo.IdleTimeout = Convert.ToInt32(spinIdleTimeout.Value)*1000;
			stpStartInfo.MaxWorkerThreads = Convert.ToInt32(spinMaxThreads.Value);
			stpStartInfo.MinWorkerThreads = Convert.ToInt32(spinMinThreads.Value);
			stpStartInfo.PerformanceCounterInstanceName = "Test SmartThreadPool";

			_smartThreadPool = new SmartThreadPool(stpStartInfo);

			//_workItemsGroup = _smartThreadPool.CreateWorkItemsGroup(1);
			_workItemsGroup = _smartThreadPool;

			workItemsProducerThread = new Thread(new ThreadStart(this.WorkItemsProducer));
			workItemsProducerThread.IsBackground = true;
			workItemsProducerThread.Start();
		}

		private void btnStop_Click(object sender, System.EventArgs e)
		{
			running = false;
			workItemsProducerThread.Join();

			_smartThreadPool.Shutdown();
			_smartThreadPool.Dispose();
			_smartThreadPool = null;
			GC.Collect();
			GC.WaitForPendingFinalizers();
			UpdateControls(false);
		}

		private void Form1_Load(object sender, System.EventArgs e)
		{
			UpdateControls(false);
		}

		private void UpdateControls(bool start)
		{
			running = start;
			spinMinThreads.Enabled = !start;
			spinMaxThreads.Enabled = !start;
			spinIdleTimeout.Enabled = !start;
			btnStart.Enabled = !start;

			btnStop.Enabled = start;
			timerPoll.Enabled = start;

			lblThreadInUse.Text = "0";
			lblThreadsInPool.Text = "0";
			lblWaitingCallbacks.Text = "0";
			usageThreadsInPool.Maximum = Convert.ToInt32(spinMaxThreads.Value);
			usageThreadsInPool.Value1 = 0;
			usageThreadsInPool.Value2 = 0;
			lblWorkItemsCompleted.Text = "0";
			lblWorkItemsGenerated.Text = "0";
			usageHistorySTP.Reset();
			usageHistorySTP.Maximum = usageThreadsInPool.Maximum;
		}

		private void spinMinThreads_ValueChanged(object sender, System.EventArgs e)
		{
			if (spinMinThreads.Value > spinMaxThreads.Value)
			{
				spinMaxThreads.Value = spinMinThreads.Value;
			}
		}

		private void spinMaxThreads_ValueChanged(object sender, System.EventArgs e)
		{
			if (spinMaxThreads.Value < spinMinThreads.Value)
			{
				spinMinThreads.Value = spinMaxThreads.Value;
			}
			usageThreadsInPool.Maximum = Convert.ToInt32(spinMaxThreads.Value);
		}

		private void timer1_Tick(object sender, System.EventArgs e)
		{
			SmartThreadPool stp = _smartThreadPool;
			if (null == stp)
			{
				return;
			}

			int threadsInUse = (int)pcInUseThreads.NextValue();
			int threadsInPool = (int)pcActiveThreads.NextValue();

			lblThreadInUse.Text = threadsInUse.ToString();
			lblThreadsInPool.Text = threadsInPool.ToString();
			lblWaitingCallbacks.Text = pcQueuedWorkItems.NextValue().ToString();  //stp.WaitingCallbacks.ToString();
			usageThreadsInPool.Value1 = threadsInUse;
			usageThreadsInPool.Value2 = threadsInPool;
			lblWorkItemsCompleted.Text = pcCompletedWorkItems.NextValue().ToString();
			lblWorkItemsGenerated.Text = workItemsGenerated.ToString();
			usageHistorySTP.AddValues(threadsInUse, threadsInPool);
		}

		private void WorkItemsProducer()
		{
			WorkItemCallback workItemCallback = new WorkItemCallback(this.DoWork);
			while(running)
			{
				IWorkItemsGroup workItemsGroup = _workItemsGroup;
				if (null == workItemsGroup)
				{
					return;
				}

				try
				{
					workItemCallback = new WorkItemCallback(this.DoWork);
					workItemsGroup.QueueWorkItem(workItemCallback);
				}
				catch(ObjectDisposedException e)
				{
                    e.GetHashCode();
					break;
				}
				workItemsGenerated++;
				Thread.Sleep(Convert.ToInt32(spinInterval.Value));
			}
		}

		private object DoWork(object obj)
		{
			Thread.Sleep(Convert.ToInt32(spinConsumingTime.Value));
			Interlocked.Increment(ref workItemsCompleted);
			return null;
		}

		private void Form1_Closing(object sender, System.ComponentModel.CancelEventArgs e)
		{
			if (null != _smartThreadPool)
			{
				_smartThreadPool.Shutdown();
				_smartThreadPool = null;
				_workItemsGroup = null;
			}
		}
	}
}