print barcode in crystal report vb.net PARALLEL PROGRAMMING in Visual C#.NET

Creator ECC200 in Visual C#.NET PARALLEL PROGRAMMING

CHAPTER 24 PARALLEL PROGRAMMING
Data Matrix Maker In C#.NET
Using Barcode drawer for .NET framework Control to generate, create Data Matrix 2d barcode image in .NET applications.
www.OnBarcode.com
Recognize Data Matrix ECC200 In C#.NET
Using Barcode decoder for Visual Studio .NET Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
In Listing 24-3, the Task called myActionTask is created using an Action which will invoke the DoSomeWork method. This has the effect of creating a Task that, once started, will call the DoSomeWork method in parallel with whatever other Task objects are running. A common approach is to replace the Action with a lambda expression, which has been done for the myLambdaTask in Listing 24-3. The Task objects myLambdaTask and myActionTask are equivalent. You can read more about using the Action class and lambda expressions in 10. However they are specified, the code statements that a Task performs in parallel are referred to as the Task body.
Code-39 Generation In C#
Using Barcode creator for VS .NET Control to generate, create Code39 image in .NET framework applications.
www.OnBarcode.com
Encode PDF-417 2d Barcode In C#.NET
Using Barcode printer for .NET Control to generate, create PDF 417 image in VS .NET applications.
www.OnBarcode.com
Starting a Task
Painting Data Matrix In Visual C#.NET
Using Barcode generator for .NET framework Control to generate, create ECC200 image in VS .NET applications.
www.OnBarcode.com
2D Printer In C#.NET
Using Barcode printer for VS .NET Control to generate, create Matrix image in .NET applications.
www.OnBarcode.com
Once you have created a Task, you can start it working by calling the Start method. This requests that the Task begins processing its workload. I say requests because the TPL will manage the set of Task objects you have started to ensure that optimum performance is achieved. This can mean that a Task is not started immediately. You can create and start a Task in a single step by using the Task.Factory.StartNew method. This method creates a new Task using the Action that you have provided as a parameter, calls Start on the Task, and then returns it as a result. Listing 24-4 demonstrates both ways of starting Task objects. Listing 24-4. Starting Tasks using System; using System.Threading.Tasks; class Listing 04 { static void Main(string[] args) { // create the action Action myAction = new Action(DoSomeWork); // create the Task using the Action Task manuallyStartedTask = new Task(myAction); // manually start the task manuallyStartedTask.Start(); // create and start a Task in a single step Task autoStartTask = Task.Factory.StartNew(myAction); // wait for input before exiting Console.WriteLine("Press enter to finish"); Console.ReadLine(); } public static void DoSomeWork() { long total = 0; for (int i = 0; i < int.MaxValue; i++) { total += i; } Console.WriteLine("Total from method: {0}", total);
Encode Barcode In C#.NET
Using Barcode creator for Visual Studio .NET Control to generate, create Barcode image in VS .NET applications.
www.OnBarcode.com
EAN / UCC - 8 Creation In C#
Using Barcode generator for .NET Control to generate, create UPC - 8 image in VS .NET applications.
www.OnBarcode.com
CHAPTER 24 PARALLEL PROGRAMMING
ECC200 Reader In Java
Using Barcode reader for Java Control to read, scan read, scan image in Java applications.
www.OnBarcode.com
Print Data Matrix 2d Barcode In None
Using Barcode creation for Software Control to generate, create Data Matrix 2d barcode image in Software applications.
www.OnBarcode.com
} } Compiling and running Listing 24-4 produces the following output: Press enter to finish Total from method: 2305843005992468481 Total from method: 2305843005992468481 Notice that the Press enter to finish message appears before the results from the tasks. This happens because the single thread that was created by the .NET Framework for sequential execution reaches the end of the Main method before the two Task objects reach the end of their calculation and print out their results the program exits and the Tasks are killed.
Decode EAN128 In C#
Using Barcode scanner for Visual Studio .NET Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
Read Barcode In Java
Using Barcode reader for Java Control to read, scan read, scan image in Java applications.
www.OnBarcode.com
Waiting for a Task
Paint Barcode In None
Using Barcode generation for Office Excel Control to generate, create Barcode image in Microsoft Excel applications.
www.OnBarcode.com
Barcode Drawer In Java
Using Barcode creation for Eclipse BIRT Control to generate, create Barcode image in BIRT reports applications.
www.OnBarcode.com
You can change the order of the results from Listing 24-4 by asking the main thread to wait for the two Task objects to complete their work before continuing to print the Press enter to finish message. To wait for a Task to complete, you simply call the Wait method. This method will not return until the Task object on which you have called the method has finished its work. Listing 24-5 provides a demonstration. Listing 24-5. Waiting for Tasks to Complete using System; using System.Threading.Tasks; class Listing 05 { static void Main(string[] args) { // create the action Action myAction = new Action(DoSomeWork); // create the Task using the Action Task manuallyStartedTask = new Task(myAction); // manually start the task manuallyStartedTask.Start(); // create and start a Task in a single step Task autoStartTask = Task.Factory.StartNew(myAction); // wait for both Tasks to complete manuallyStartedTask.Wait(); autoStartTask.Wait(); // wait for input before exiting Console.WriteLine("Press enter to finish");
Generating Barcode In Java
Using Barcode printer for Android Control to generate, create Barcode image in Android applications.
www.OnBarcode.com
Drawing EAN 13 In None
Using Barcode generation for Online Control to generate, create UPC - 13 image in Online applications.
www.OnBarcode.com
CHAPTER 24 PARALLEL PROGRAMMING
QR Code 2d Barcode Reader In Visual Basic .NET
Using Barcode reader for Visual Studio .NET Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
Draw Data Matrix 2d Barcode In Java
Using Barcode printer for Android Control to generate, create ECC200 image in Android applications.
www.OnBarcode.com
Console.ReadLine(); } public static void DoSomeWork() { long total = 0; for (int i = 0; i < int.MaxValue; i++) { total += i; } Console.WriteLine("Total from method: {0}", total); } } The Wait calls are marked in bold. In Listing 24-5, you call Wait on one method and then the other. If a Task has completed its work before you call Wait, then the method returns immediately. If you have a lot of Tasks, it can be more convenient to use the static Task.WaitAll method, which will wait for a set of Tasks in a single method call. Listing 24-6 contains an example. Listing 24-6. Waiting for a Set of Tasks using System; using System.Threading.Tasks; class Listing 06 { static void Main(string[] args) { // create the action Action myAction = new Action(DoSomeWork); // create the Task using the Action Task manuallyStartedTask = new Task(myAction); // manually start the task manuallyStartedTask.Start(); // create and start a Task in a single step Task autoStartTask = Task.Factory.StartNew(myAction); // wait for both Tasks to complete Task.WaitAll(manuallyStartedTask, autoStartTask); // wait for input before exiting Console.WriteLine("Press enter to finish"); Console.ReadLine(); } public static void DoSomeWork() { long total = 0; for (int i = 0; i < int.MaxValue; i++) { total += i; } Console.WriteLine("Total from method: {0}", total);
Code 3/9 Encoder In Java
Using Barcode creator for BIRT Control to generate, create Code 39 Full ASCII image in Eclipse BIRT applications.
www.OnBarcode.com
2D Barcode Drawer In Java
Using Barcode maker for Java Control to generate, create Matrix image in Java applications.
www.OnBarcode.com
Copyright © OnBarcode.com . All rights reserved.