barcode label printing in vb.net PARALLELIZATION AND THREADING ENHANCEMENTS in VB.NET

Drawer QR in VB.NET PARALLELIZATION AND THREADING ENHANCEMENTS

PARALLELIZATION AND THREADING ENHANCEMENTS
Denso QR Bar Code Printer In VB.NET
Using Barcode generation for .NET Control to generate, create QR Code ISO/IEC18004 image in VS .NET applications.
www.OnBarcode.com
QR Code Scanner In VB.NET
Using Barcode reader for .NET framework Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
MyBarrier.SignalAndWait(); Console.WriteLine("Off we go from short task!"); } static void DoSomethingLong() { Console.WriteLine("Doing a long task for 10 seconds"); Thread.Sleep(10000); Console.WriteLine("Completed a long task"); MyBarrier.SignalAndWait(); Console.WriteLine("Off we go from long task!"); } } The Barrier class also allows you to change participants at runtime through the AddParticipant()() and RemoveParticipant() methods.
2D Barcode Drawer In VB.NET
Using Barcode generation for .NET Control to generate, create 2D image in VS .NET applications.
www.OnBarcode.com
Paint Barcode In Visual Basic .NET
Using Barcode creator for Visual Studio .NET Control to generate, create Barcode image in VS .NET applications.
www.OnBarcode.com
Cancellation Tokens
Printing Code 39 Extended In VB.NET
Using Barcode maker for Visual Studio .NET Control to generate, create Code 39 Full ASCII image in .NET applications.
www.OnBarcode.com
UPC-A Supplement 5 Generator In VB.NET
Using Barcode printer for VS .NET Control to generate, create GS1 - 12 image in .NET framework applications.
www.OnBarcode.com
Cancellation tokens are a struct that provide a consistent means of cancellation. You might want to use a cancellation token to cancel a function or task that is taking too long or using too much of a machine s resources. Support is provided in many of the Task and PLINQ methods for the use of cancellation tokens. To use cancellation tokens, you first need to create a CancellationTokenSource. Then you can utilize it to pass a cancellation token into the target method by using the Token property. Within your method, you can then check the token s IsCancellationRequested property and throw an operation cancelled exception if you find this to be true (e.g. a cancellation has occurred). When you want to perform a cancellation, you simply need to call the Cancel() method on the cancellation source that will then set the token s IsCancellationRequested() method to true. This sounds more complex than it actually is; the following example demonstrates this process: static CancellationTokenSource cts = new CancellationTokenSource(); static void Main(string[] args) { Task t = Task.Factory.StartNew(() => DoSomething(), cts.Token); System.Threading.Thread.Sleep(2000); cts.Cancel(); Console.ReadKey(); } public static void DoSomething() { try { while (true) { Console.WriteLine("doing stuff");
Creating ECC200 In Visual Basic .NET
Using Barcode encoder for VS .NET Control to generate, create Data Matrix image in Visual Studio .NET applications.
www.OnBarcode.com
Generating ISSN - 13 In VB.NET
Using Barcode creation for VS .NET Control to generate, create ISSN image in .NET applications.
www.OnBarcode.com
PARALLELIZATION AND THREADING ENHANCEMENTS
Quick Response Code Reader In VS .NET
Using Barcode decoder for VS .NET Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
Create QR-Code In None
Using Barcode encoder for Software Control to generate, create QR-Code image in Software applications.
www.OnBarcode.com
if (cts.Token.IsCancellationRequested == true) { Console.WriteLine("cancelled"); throw new OperationCanceledException(cts.Token); } } } catch (OperationCanceledException ex) { //operation cancelled do any clean up here Console.WriteLine("Cancellation occurred"); } }
Paint UPC Code In None
Using Barcode creator for Font Control to generate, create UCC - 12 image in Font applications.
www.OnBarcode.com
Barcode Generation In Visual Studio .NET
Using Barcode creator for Visual Studio .NET Control to generate, create Barcode image in Visual Studio .NET applications.
www.OnBarcode.com
CountDownEvent
Scanning UPC-A Supplement 2 In Visual Studio .NET
Using Barcode scanner for .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
Reading Data Matrix ECC200 In None
Using Barcode scanner for Software Control to read, scan read, scan image in Software applications.
www.OnBarcode.com
The new CountDownEvent is initialized with an integer value and can block code until the value reaches 0 (the value is decremented by calling the signal method). CountDownEvent is particularly useful for keeping track of scenarios in which many threads have been forked. The following example blocks until the count has been decremented twice: using System.Collections.Concurrent; using System.Threading; namespace 5 { static CountdownEvent CountDown = new CountdownEvent(2); static void Main(string[] args) { ThreadPool.QueueUserWorkItem(new WaitCallback(CountDownDeduct)); ThreadPool.QueueUserWorkItem(new WaitCallback(CountDownDeduct)); //Wait until countdown decremented by DecrementCountDown method CountDown.Wait(); Console.WriteLine("Completed"); Console.ReadKey(); } static void CountDownDeduct(object StateInfo) { System.Threading.Thread.Sleep(5000); Console.WriteLine("Deducting 1 from countdown"); CountDown.Signal(); } }
Draw Barcode In Objective-C
Using Barcode creator for iPhone Control to generate, create Barcode image in iPhone applications.
www.OnBarcode.com
QR Code Generation In None
Using Barcode creator for Word Control to generate, create QR Code JIS X 0510 image in Word applications.
www.OnBarcode.com
PARALLELIZATION AND THREADING ENHANCEMENTS
EAN / UCC - 14 Printer In None
Using Barcode printer for Software Control to generate, create GTIN - 128 image in Software applications.
www.OnBarcode.com
Barcode Encoder In Visual C#.NET
Using Barcode creation for Visual Studio .NET Control to generate, create Barcode image in VS .NET applications.
www.OnBarcode.com
ManualResetEventSlim and SemaphoreSlim
Code 128 Code Set A Generation In .NET Framework
Using Barcode maker for Reporting Service Control to generate, create Code 128A image in Reporting Service applications.
www.OnBarcode.com
Create Code 128 Code Set B In None
Using Barcode printer for Microsoft Excel Control to generate, create Code 128 Code Set C image in Excel applications.
www.OnBarcode.com
ManualResetEventSlim and SemaphoreSlim are lightweight versions of the existing ManualResetEvent and Semaphore classes. The new classes do not use resource-expensive kernel features as their predecessors did.
SpinLock
SpinLock forces a program to loop until it can obtain and lock access to a particular resource. This should be used when you don t have to wait too long. Although looping (rather than handing control over to another thread) sounds like a wasteful thing to do, it can potentially be much more efficient than stopping to process other threads because it avoids a context switch (a resource-intensive process in which the current CPU state is stored, and a new state is loaded). private static SpinLock MySpinLock = new SpinLock(); static void Main(string[] args) { bool Locked = false; try { MySpinLock.Enter(ref Locked); //Work that requires lock would be done here } finally { if (Locked) { MySpinLock.Exit(); } } }
ThreadLocal<T>
ThreadLocal is a lazy initialized variable for each thread (see 4 for more info about lazy initialized variables).
PARALLELIZATION AND THREADING ENHANCEMENTS
Future Considerations
By parallelizing an application, you can greatly speed it up (or slow it down if you do it badly!). It is worth considering the following: It is a shame that the ability to utilize all available processing power on a machine (for example, dormant GPUs) was not included in this release. Many developers feel the Concurrency and Coordination Runtime (CCR) should have been included in this release. The CCR assists with creating loosely coupled asynchronous applications and was originally included with Microsoft Robotics Studio (it has since been separated out). At the time of writing, the CCR is not free for commercial usage. For more info on CCR, please refer to: http://msdn. microsoft.com/en-gb/library/bb648752.aspx. Looking toward the future, is it possible that a future version of Task Manager could allow you to distribute work across multiple machines paving the way for grid computing libraries within .NET Multicore shift will mean that existing pricing/licensing models need to be reconsidered.
Copyright © OnBarcode.com . All rights reserved.