implemented db, cache, and tasks

WindowsFormsAppCache/WindowsFormsAppCache/Form1.Designer.cs

@@ -28,13 +28,112 @@
         /// </summary>
         private void InitializeComponent()
         {
-            this.components = new System.ComponentModel.Container();
+            this.pictureBox1 = new System.Windows.Forms.PictureBox();
+            this.pictureBox2 = new System.Windows.Forms.PictureBox();
+            this.pictureBox3 = new System.Windows.Forms.PictureBox();
+            this.pictureBox4 = new System.Windows.Forms.PictureBox();
+            this.button1 = new System.Windows.Forms.Button();
+            this.button2 = new System.Windows.Forms.Button();
+            this.button3 = new System.Windows.Forms.Button();
+            ((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).BeginInit();
+            ((System.ComponentModel.ISupportInitialize)(this.pictureBox2)).BeginInit();
+            ((System.ComponentModel.ISupportInitialize)(this.pictureBox3)).BeginInit();
+            ((System.ComponentModel.ISupportInitialize)(this.pictureBox4)).BeginInit();
+            this.SuspendLayout();
+            // 
+            // pictureBox1
+            // 
+            this.pictureBox1.Location = new System.Drawing.Point(67, 30);
+            this.pictureBox1.Name = "pictureBox1";
+            this.pictureBox1.Size = new System.Drawing.Size(221, 181);
+            this.pictureBox1.TabIndex = 0;
+            this.pictureBox1.TabStop = false;
+            // 
+            // pictureBox2
+            // 
+            this.pictureBox2.Location = new System.Drawing.Point(524, 30);
+            this.pictureBox2.Name = "pictureBox2";
+            this.pictureBox2.Size = new System.Drawing.Size(221, 181);
+            this.pictureBox2.TabIndex = 1;
+            this.pictureBox2.TabStop = false;
+            // 
+            // pictureBox3
+            // 
+            this.pictureBox3.Location = new System.Drawing.Point(67, 257);
+            this.pictureBox3.Name = "pictureBox3";
+            this.pictureBox3.Size = new System.Drawing.Size(221, 181);
+            this.pictureBox3.TabIndex = 2;
+            this.pictureBox3.TabStop = false;
+            // 
+            // pictureBox4
+            // 
+            this.pictureBox4.Location = new System.Drawing.Point(524, 257);
+            this.pictureBox4.Name = "pictureBox4";
+            this.pictureBox4.Size = new System.Drawing.Size(221, 181);
+            this.pictureBox4.TabIndex = 3;
+            this.pictureBox4.TabStop = false;
+            // 
+            // button1
+            // 
+            this.button1.Location = new System.Drawing.Point(370, 188);
+            this.button1.Name = "button1";
+            this.button1.Size = new System.Drawing.Size(75, 23);
+            this.button1.TabIndex = 4;
+            this.button1.Text = " Start (Lock)";
+            this.button1.UseVisualStyleBackColor = true;
+            this.button1.Click += new System.EventHandler(this.Button1_Click);
+            // 
+            // button2
+            // 
+            this.button2.Location = new System.Drawing.Point(354, 230);
+            this.button2.Name = "button2";
+            this.button2.Size = new System.Drawing.Size(113, 23);
+            this.button2.TabIndex = 5;
+            this.button2.Text = "Start (RWLS)";
+            this.button2.UseVisualStyleBackColor = true;
+            this.button2.Click += new System.EventHandler(this.Button2_Click);
+            // 
+            // button3
+            // 
+            this.button3.Location = new System.Drawing.Point(354, 273);
+            this.button3.Name = "button3";
+            this.button3.Size = new System.Drawing.Size(109, 23);
+            this.button3.TabIndex = 6;
+            this.button3.Text = "Start (NoCache)";
+            this.button3.UseVisualStyleBackColor = true;
+            this.button3.Click += new System.EventHandler(this.Button3_Click);
+            // 
+            // Form1
+            // 
+            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
             this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
             this.ClientSize = new System.Drawing.Size(800, 450);
+            this.Controls.Add(this.button3);
+            this.Controls.Add(this.button2);
+            this.Controls.Add(this.button1);
+            this.Controls.Add(this.pictureBox4);
+            this.Controls.Add(this.pictureBox3);
+            this.Controls.Add(this.pictureBox2);
+            this.Controls.Add(this.pictureBox1);
+            this.Name = "Form1";
             this.Text = "Form1";
+            ((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).EndInit();
+            ((System.ComponentModel.ISupportInitialize)(this.pictureBox2)).EndInit();
+            ((System.ComponentModel.ISupportInitialize)(this.pictureBox3)).EndInit();
+            ((System.ComponentModel.ISupportInitialize)(this.pictureBox4)).EndInit();
+            this.ResumeLayout(false);
+
         }
 
         #endregion
+
+        private System.Windows.Forms.PictureBox pictureBox1;
+        private System.Windows.Forms.PictureBox pictureBox2;
+        private System.Windows.Forms.PictureBox pictureBox3;
+        private System.Windows.Forms.PictureBox pictureBox4;
+        private System.Windows.Forms.Button button1;
+        private System.Windows.Forms.Button button2;
+        private System.Windows.Forms.Button button3;
     }
 }
 

WindowsFormsAppCache/WindowsFormsAppCache/Form1.cs

@@ -5,6 +5,7 @@ using System.Data;
 using System.Drawing;
 using System.Linq;
 using System.Text;
+using System.Threading;
 using System.Threading.Tasks;
 using System.Windows.Forms;
 
@@ -16,5 +17,288 @@ namespace WindowsFormsAppCache
         {
             InitializeComponent();
         }
+
+        private void Button1_Click(object sender, EventArgs e)
+        {
+            Object lockobject = new Object();
+
+            var t1 = new Task((pb) =>
+            {
+                PictureBox pb2 = (PictureBox) pb;
+                while (true)
+                {
+                    Random ran = new Random();
+                    int number = ran.Next(0, 6);
+                    lock (lockobject)
+                    {
+                        pb2.Image = Cache.getImageFromCache(number);
+                    }
+                }
+            }, pictureBox1);
+            ;
+
+
+            var t2 = new Task((pb) =>
+            {
+                PictureBox pb2 = (PictureBox) pb;
+                while (true)
+                {
+                    Random ran = new Random();
+                    int number = ran.Next(0, 6);
+                    lock (lockobject)
+                    {
+                        pb2.Image = Cache.getImageFromCache(number);
+                    }
+                }
+            }, pictureBox2);
+            ;
+
+            var t3 = new Task((pb) =>
+            {
+                PictureBox pb2 = (PictureBox) pb;
+                while (true)
+                {
+                    Random ran = new Random();
+                    int number = ran.Next(0, 6);
+                    lock (lockobject)
+                    {
+                        pb2.Image = Cache.getImageFromCache(number);
+                    }
+                }
+            }, pictureBox3);
+            ;
+
+            var t4 = new Task((pb) =>
+            {
+                PictureBox pb2 = (PictureBox) pb;
+                while (true)
+                {
+                    Random ran = new Random();
+                    int number = ran.Next(0, 6);
+                    lock (lockobject)
+                    {
+                        pb2.Image = Cache.getImageFromCache(number);
+                    }
+                }
+            }, pictureBox4);
+            ;
+
+
+            t1.Start();
+            t2.Start();
+            t3.Start();
+            t4.Start();
+
+
+            Task.WaitAll(t1, t2, t3, t4);
+        }
+
+        private void Button2_Click(object sender, EventArgs e)
+        {
+            ReaderWriterLockSlim rwls = new ReaderWriterLockSlim();
+
+            var t1 = new Task((pb) =>
+            {
+                PictureBox pb2 = (PictureBox) pb;
+                while (true)
+                {
+                    Random ran = new Random();
+                    int number = ran.Next(0, 6);
+                    rwls.EnterReadLock();
+                    pb2.Image = Cache.getImageFromCache(number);
+                    rwls.ExitReadLock();
+                }
+            }, pictureBox1);
+            ;
+
+
+            var t2 = new Task((pb) =>
+            {
+                PictureBox pb2 = (PictureBox) pb;
+                while (true)
+                {
+                    Random ran = new Random();
+                    int number = ran.Next(0, 6);
+                    rwls.EnterReadLock();
+                    pb2.Image = Cache.getImageFromCache(number);
+                    rwls.ExitReadLock();
+                }
+            }, pictureBox2);
+            ;
+
+            var t3 = new Task((pb) =>
+            {
+                PictureBox pb2 = (PictureBox) pb;
+                while (true)
+                {
+                    Random ran = new Random();
+                    int number = ran.Next(0, 6);
+                    rwls.EnterReadLock();
+                    pb2.Image = Cache.getImageFromCache(number);
+                    rwls.ExitReadLock();
+                }
+            }, pictureBox3);
+            ;
+
+            var t4 = new Task((pb) =>
+            {
+                PictureBox pb2 = (PictureBox) pb;
+                while (true)
+                {
+                    Random ran = new Random();
+                    int number = ran.Next(0, 6);
+                    rwls.EnterReadLock();
+                    pb2.Image = Cache.getImageFromCache(number);
+                    rwls.ExitReadLock();
+                }
+            }, pictureBox4);
+            ;
+
+
+            t1.Start();
+            t2.Start();
+            t3.Start();
+            t4.Start();
+
+
+            Task.WaitAll(t1, t2, t3, t4);
+        }
+
+        private void Button3_Click(object sender, EventArgs e)
+        {
+
+
+            ReaderWriterLockSlim rwls = new ReaderWriterLockSlim();
+
+            var t1 = new Task((pb) =>
+            {
+                PictureBox pb2 = (PictureBox)pb;
+                while (true)
+                {
+                    Random ran = new Random();
+                    int number = ran.Next(0, 6);
+                    rwls.EnterReadLock();
+                    pb2.Image = DB.getImageFromDB(number);
+                    rwls.ExitReadLock();
+                }
+            }, pictureBox1);
+            ;
+
+
+            var t2 = new Task((pb) =>
+            {
+                PictureBox pb2 = (PictureBox)pb;
+                while (true)
+                {
+                    Random ran = new Random();
+                    int number = ran.Next(0, 6);
+                    rwls.EnterReadLock();
+                    pb2.Image = DB.getImageFromDB(number);
+                    rwls.ExitReadLock();
+                }
+            }, pictureBox2);
+            ;
+
+            var t3 = new Task((pb) =>
+            {
+                PictureBox pb2 = (PictureBox)pb;
+                while (true)
+                {
+                    Random ran = new Random();
+                    int number = ran.Next(0, 6);
+                    rwls.EnterReadLock();
+                    pb2.Image = DB.getImageFromDB(number);
+                    rwls.ExitReadLock();
+                }
+            }, pictureBox3);
+            ;
+
+            var t4 = new Task((pb) =>
+            {
+                PictureBox pb2 = (PictureBox)pb;
+                while (true)
+                {
+                    Random ran = new Random();
+                    int number = ran.Next(0, 6);
+                    rwls.EnterReadLock();
+                    pb2.Image = DB.getImageFromDB(number);
+                    rwls.ExitReadLock();
+                }
+            }, pictureBox4);
+            ;
+
+
+            t1.Start();
+            t2.Start();
+            t3.Start();
+            t4.Start();
+
+
+            Task.WaitAll(t1, t2, t3, t4);
+
+
+
+        }
+    }
+
+
+    public static class DB
+    {
+        public static Bitmap getImageFromDB(int colorNumber)
+        {
+            Thread.Sleep(1000);
+
+            Color[] color = new Color[7];
+
+            color[0] = Color.White;
+            color[1] = Color.Blue;
+            color[2] = Color.Green;
+            color[3] = Color.Yellow;
+            color[4] = Color.Black;
+            color[5] = Color.Chocolate;
+            color[6] = Color.Brown;
+
+
+
+
+            var b = new Bitmap(1, 1);
+            b.SetPixel(0, 0, color[colorNumber]);
+            var result = new Bitmap(b, 128, 128);
+            return result;
+        }
+    }
+
+
+    public static class Cache
+    {
+        private static List<int> colorCache = new List<int>();
+     
+        public static Bitmap getImageFromCache(int colorNumber)
+        {
+            Thread.Sleep(100);
+            if (colorCache.Contains(colorNumber))
+            {
+                Color[] color = new Color[7];
+
+                color[0] = Color.White;
+                color[1] = Color.Blue;
+                color[2] = Color.Green;
+                color[3] = Color.Yellow;
+                color[4] = Color.Black;
+                color[5] = Color.Chocolate;
+                color[6] = Color.Brown;
+
+
+                var b = new Bitmap(1, 1);
+                b.SetPixel(0, 0, color[colorNumber]);
+                var result = new Bitmap(b, 128, 128);
+                return result;
+            }
+            else
+            {
+                colorCache.Add(colorNumber);
+                return DB.getImageFromDB(colorNumber);
+            }
+        }
     }
 }

WindowsFormsAppCache/WindowsFormsAppCache/Form1.resx

@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>

WindowsFormsAppCache/WindowsFormsAppCache/Program.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Security.AccessControl;
 using System.Threading.Tasks;
 using System.Windows.Forms;
 
@@ -18,5 +19,10 @@ namespace WindowsFormsAppCache
             Application.SetCompatibleTextRenderingDefault(false);
             Application.Run(new Form1());
         }
+
+
+        
+
+
     }
 }

WindowsFormsAppCache/WindowsFormsAppCache/WindowsFormsAppCache.csproj

@@ -54,6 +54,9 @@
     </Compile>
     <Compile Include="Program.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
+    <EmbeddedResource Include="Form1.resx">
+      <DependentUpon>Form1.cs</DependentUpon>
+    </EmbeddedResource>
     <EmbeddedResource Include="Properties\Resources.resx">
       <Generator>ResXFileCodeGenerator</Generator>
       <LastGenOutput>Resources.Designer.cs</LastGenOutput>