static void Main(string[] args)
{
// Get the currently-running thread object.
Thread primaryThreadObject = Thread.CurrentThread;
// Set the name of the thread. This will help with debugging
// when looking at the Threads window.
primaryThreadObject.Name = "The Main Thread";
// Get the thread ID so that we can use it in output statements.
int threadId = primaryThreadObject.ManagedThreadId;
try
{
// Display a message to show we're in Main().
Console.WriteLine("{0}: Starting the program.", threadId);
// Get the number of milliseconds from the arguments
// passed in from the command line.
int milliseconds = GetMilliseconds(args[0]);
// Create the ComplicatedCalculator objects.
ComplicatedCalculator cc1 =
new ComplicatedCalculator(milliseconds);
ComplicatedCalculator cc2 =
new ComplicatedCalculator(milliseconds);
ComplicatedCalculator cc3 =
new ComplicatedCalculator(milliseconds);
ComplicatedCalculator cc4 =
new ComplicatedCalculator(milliseconds);
// Create the ParameterizedThreadStart delegate. This
// delegate will be used to pass an array of doubles
// to the method on the secondary thread.
// First run using the set of arguments below.
double[] numbers1 = { 10.4, 7.451 };
double[] numbers2 = { 18.7, 3.6 };
double[] numbers3 = { 12.7, 8.6 };
double[] numbers4 = { 15.2, 5.3 };
// Second run with set of arguments below showing that the
// results are no different whether or not lambda
// expressions are used.
//double[] numbers1 = { 10.4, 7.451 };
//double[] numbers2 = { 10.4, 7.451 };
//double[] numbers3 = { 10.4, 7.451 };
//double[] numbers4 = { 10.4, 7.451 };
ParameterizedThreadStart threadedMethod1 =
new ParameterizedThreadStart(cc1.CalculateValue);
// Create the thread objects and start the threads. In this
// case, when we call Start(), we pass in the double array
// as an argument.
// All 4 ways of creating a thread instance below, causes the
// ParameterizedThreadStart delegate to be generated by the compiler.
// Creates an instance of a thread that is assigned a
// ParameterizedThreadStart delegate.
Thread secondaryThread1 = new Thread(threadedMethod1);
// Creates a new thread that is implicitly assigned a ParameterizedThreadStart
// delegate for the new thread.
Thread secondaryThread2 = new Thread(cc2.CalculateValue);
// Use a lambda expression to create a new thread that is implicitly assigned a
// ParameterizedThreadStart delegate.
Thread secondaryThread3 = new Thread((Object obj) => cc3.CalculateValue(obj));
// Use a lambda expression to create a new thread that is implicitly assigned a
// ParameterizedThreadStart delegate.
Thread secondaryThread4 = new Thread((obj) => { cc4.CalculateValue(obj); });
// Set the name of the secondary threads.
secondaryThread1.Name = "Calculation Thread #1";
secondaryThread2.Name = "Calculation Thread #2";
secondaryThread3.Name = "Calculation Thread #3";
secondaryThread4.Name = "Calculation Thread #4";
// Start the threads.
secondaryThread1.Start(numbers1);
secondaryThread2.Start(numbers2);
secondaryThread3.Start(numbers3);
secondaryThread4.Start(numbers4);
// Display some messages to show that Main() is still
// responsive while the calculation is going on.
Console.WriteLine
("\n{0}: Now I'm going to go do something else.",
threadId);
System.Threading.Thread.Sleep(1500);
Console.WriteLine("\n{0}: Like talk about the weather.",
threadId);
System.Threading.Thread.Sleep(1500);
Console.WriteLine("\n{0}: Or the latest news.",
threadId);
System.Threading.Thread.Sleep(1500);
Console.WriteLine("\n{0}: You know, my foot hurts.",
threadId);
System.Threading.Thread.Sleep(1500);
Console.WriteLine("\n{0}: I love hotdogs!",
threadId);
System.Threading.Thread.Sleep(1500);
Console.WriteLine
("\n{0}: How much is a shake at Burgermaster?",
threadId);
System.Threading.Thread.Sleep(1500);
Console.WriteLine("\n{0}: Ok, now I'm getting hungry!",
threadId);
System.Threading.Thread.Sleep(1500);
// Join one of the secondary threads.
JoinThread(threadId, secondaryThread1);
// Join the other secondary thread.
JoinThread(threadId, secondaryThread2);
// Join the other secondary thread.
JoinThread(threadId, secondaryThread3);
// Join the other secondary thread.
JoinThread(threadId, secondaryThread4);
Console.WriteLine("\n{0}: The result from {1} is: {2}",
threadId, secondaryThread1.ManagedThreadId, cc1.Results);
Console.WriteLine("\n{0}: The result from {1} is: {2}",
threadId, secondaryThread2.ManagedThreadId, cc2.Results);
Console.WriteLine("\n{0}: The result from {1} is: {2}",
threadId, secondaryThread3.ManagedThreadId, cc3.Results);
Console.WriteLine("\n{0}: The result from {1} is: {2}",
threadId, secondaryThread4.ManagedThreadId, cc4.Results);
}
catch (Exception e)
{
Console.WriteLine("\n{0}: EXCEPTION: {1}.",
threadId, e.Message);
}
// Pause so we can look at the console window.
Console.Write("\n\n{0}: Press <ENTER> to end: ",
threadId);
Console.ReadLine();
}
