线程同步实例

  1using System;
  2using System.Drawing;
  3using System.Collections;
  4using System.ComponentModel;
  5using System.Windows.Forms;
  6using System.Data;
  7// 新添加的一个命名空间。
  8using System.Threading;
  9
 10namespace ThreadSync
 11{
 12    /**//// <summary>
 13    /// 线程同步实例。
 14    /// </summary>
 15    public class Form1 : System.Windows.Forms.Form
 16    {
 17        private System.Windows.Forms.Label label1;
 18        private System.Windows.Forms.Label label2;
 19        private System.Windows.Forms.Button button1;
 20        private System.Windows.Forms.Button button2;
 21        private System.Windows.Forms.Label labProduce;
 22        private System.Windows.Forms.Label labConsume;
 23        /**//// <summary>
 24        /// 必需的设计器变量。
 25        /// </summary>
 26        private System.ComponentModel.Container components = null;
 27
 28        public Form1()
 29        {
 30            // Windows 窗体设计器支持所必需的
 31            InitializeComponent();
 32            // TODO: 在 InitializeComponent 调用后添加任何构造函数代码
 33        }
 34
 35        /**//// <summary>
 36        /// 清理所有正在使用的资源。
 37        /// </summary>
 38        protected override void Dispose( bool disposing )
 39        {
 40            if( disposing )
 41            {
 42                if (components != null)
 43                {
 44                    components.Dispose();
 45                }
 46            }
 47            base.Dispose( disposing );
 48        }
 49        Windows Form Designer generated code#region Windows Form Designer generated code
 50        /**//// <summary>
 51        /// 设计器支持所需的方法 - 不要使用代码编辑器修改
 52        /// 此方法的内容。
 53        /// </summary>
 54        private void InitializeComponent()
 55        {
 56            this.label1 = new System.Windows.Forms.Label();
 57            this.label2 = new System.Windows.Forms.Label();
 58            this.button1 = new System.Windows.Forms.Button();
 59            this.button2 = new System.Windows.Forms.Button();
 60            this.labProduce = new System.Windows.Forms.Label();
 61            this.labConsume = new System.Windows.Forms.Label();
 62            this.SuspendLayout();
 63            //
 64            // label1
 65            //
 66            this.label1.Location = new System.Drawing.Point(58, 48);
 67            this.label1.Name = "label1";
 68            this.label1.TabIndex = 0;
 69            this.label1.Text = "生产者";
 70            //
 71            // label2
 72            //
 73            this.label2.Location = new System.Drawing.Point(234, 48);
 74            this.label2.Name = "label2";
 75            this.label2.TabIndex = 1;
 76            this.label2.Text = "消费者";
 77            //
 78            // button1
 79            //
 80            this.button1.Location = new System.Drawing.Point(64, 168);
 81            this.button1.Name = "button1";
 82            this.button1.TabIndex = 2;
 83            this.button1.Text = "开始";
 84            this.button1.TextAlign = System.Drawing.ContentAlignment.TopCenter;
 85            this.button1.Click += new System.EventHandler(this.button1_Click);
 86            //
 87            // button2
 88            //
 89            this.button2.Enabled = false;
 90            this.button2.Location = new System.Drawing.Point(231, 168);
 91            this.button2.Name = "button2";
 92            this.button2.TabIndex = 3;
 93            this.button2.Text = "结束";
 94            this.button2.TextAlign = System.Drawing.ContentAlignment.TopCenter;
 95            this.button2.Click += new System.EventHandler(this.button2_Click);
 96            //
 97            // labProduce
 98            //
 99            this.labProduce.Location = new System.Drawing.Point(58, 88);
100            this.labProduce.Name = "labProduce";
101            this.labProduce.TabIndex = 4;
102            //
103            // labConsume
104            //
105            this.labConsume.Location = new System.Drawing.Point(234, 88);
106            this.labConsume.Name = "labConsume";
107            this.labConsume.TabIndex = 5;
108            //
109            // Form1
110            //
111            this.AutoScaleBaseSize = new System.Drawing.Size(8, 18);
112            this.ClientSize = new System.Drawing.Size(392, 226);
113            this.Controls.AddRange(new System.Windows.Forms.Control[] {
114                this.labConsume,
115                this.labProduce,
116                this.button2,
117                this.button1,
118                this.label2,
119                this.label1});
120            this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedDialog;
121            this.Name = "Form1";
122            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
123            this.Text = "线程同步";
124            this.Closing += new System.ComponentModel.CancelEventHandler(this.Form1_Closing);
125            this.ResumeLayout(false);
126
127        }
128        #endregion
129
130        /**//// <summary>
131        /// 应用程序的主入口点。
132        /// </summary>
133        [STAThread]
134        static void Main()
135        {
136            Application.Run(new Form1());
137        }
138        private ReaderWriterLock rwl = new ReaderWriterLock();
139        private Thread thdProduce = null;
140        private Thread thdConsume = null;
141        private int m_iCounter = 0;
142        // 生产者线程函数
143        private void ThreadProduce()
144        {
145            while(true)
146            {
147                rwl.AcquireWriterLock(Timeout.Infinite);
148                while(m_iCounter < 1000)
149                {
150                    m_iCounter++;
151                    labProduce.Text = m_iCounter.ToString();
152                    Thread.Sleep(10);
153                }
154                rwl.ReleaseWriterLock();
155            }
156        }
157        // 消费者线程函数
158        private void ThreadConsume()
159        {
160            while(true)
161            {
162                rwl.AcquireReaderLock(Timeout.Infinite);
163                while(m_iCounter > 0)
164                {
165                    m_iCounter--;
166                    labConsume.Text = m_iCounter.ToString();
167                    Thread.Sleep(10);
168                }
169                rwl.ReleaseReaderLock();
170            }
171        }
172        // 启动线程的运行。
173        private void button1_Click(object sender, System.EventArgs e)
174        {
175            button1.Enabled = false;
176            button2.Enabled = true;
177            thdProduce = new Thread(new ThreadStart(this.ThreadProduce));
178            thdConsume = new Thread(new ThreadStart(this.ThreadConsume));
179            if(thdProduce != null)
180                thdProduce.Start();
181            if(thdConsume != null)
182                thdConsume.Start();
183        }
184        // 停止线程的运行。
185        private void button2_Click(object sender, System.EventArgs e)
186        {
187            rwl.ReleaseLock();
188            if(thdProduce != null)
189                thdProduce.Abort();
190            thdProduce = null;
191            if(thdConsume != null)
192                thdConsume.Abort();
193            thdConsume = null;
194            button1.Enabled = true;
195            button2.Enabled = false;
196        }
197        private void Form1_Closing(object sender, System.ComponentModel.CancelEventArgs e)
198        {
199            rwl.ReleaseLock();
200            if(thdProduce != null)
201                thdProduce.Abort();
202            if(thdConsume != null)
203                thdConsume.Abort();
204        }
205    }
206}
207