code 128 c# GetHashCode GetHashCode is a method that returns an integer value that will be unique in Visual C#.NET

Paint Code-128 in Visual C#.NET GetHashCode GetHashCode is a method that returns an integer value that will be unique

GetHashCode GetHashCode is a method that returns an integer value that will be unique
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within an application domain.
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Thread names are great for what they are intended, which is associating an easily recognizable value with a thread. Assigning a thread a name can greatly improve and simplify the debugging process.
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USING SLEEP AND INTERRUPT
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What s the difference between a web site stress-testing tool and a web site monitor The short answer is the amount of time between requests. The goals of the two products are very different. Both applications repeatedly request pages from a web server, but a stress-testing tool is designed to request as many pages as possible; a web site monitor requests its pages at a much slower rate. To slow down the requesting of pages, we can use the Thread class s Sleep method. Threads go through many different states, one of which is WaitSleepJoin. As you might guess, a thread enters this state when it executes the Wait, Sleep, or Join methods. This section discusses how the Sleep method of the Thread class affects the state of a thread. It also discusses how a thread can be triggered to exit the WaitSleepJoin state by using the Interrupt method.
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The Sleep method Imagine how much you could accomplish if you never rested. The same is very true of threads. Since a computer s processor and memory are finite shared resources, if one thread doesn t rest other threads may not be able to get their work done. Many applications rely on a relatively large amount of time passing between actions. For example, if the web site monitor were to constantly request pages, it would put an unnecessary stress on the web site that it was monitoring. Fortunately, we can use the Sleep method to suspend the execution of a thread for a period of time.
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Sleep is a method on the Thread class that enables the current thread to pause its execution for a period of time. Alternatively, it can be used to yield the remainder of its time to the OS.
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A thread can put only itself to sleep. This means that one thread cannot cause a different thread to sleep by calling its Sleep method. Because Sleep is such a useful method, we ve been working with it for some time now. Listing 5.3 shows Sleep in a number of forms.
Listing 5.3 Example of using various forms of Sleep (VB.NET)
Sub Main() Thread.CurrentThread.Name = "Main" Console.WriteLine(Thread.CurrentThread.Name) Dim SiteMonitor As New WebSiteMonitor("http://localhost/test.htm", 1000) Dim ThreadWatcher As ThreadStateWatcher ThreadWatcher = New ThreadStateWatcher() ThreadWatcher.WatchThread(Thread.CurrentThread) SiteMonitor.Start() Dim D, H, M, S, MS As Integer D = 0 ' Days H = 0 ' Hours Sleeps for M = 0 ' Minutes one second S = 20 ' Seconds Gives up the MS = 0 ' Milliseconds remainder of Thread.Sleep(1000) the time slice Thread.Sleep(0) Sleeps for Thread.Sleep(New TimeSpan(100)) 100 ticks Thread.Sleep(New TimeSpan(H, M, S)) Thread.Sleep(New TimeSpan(D, H, M, S)) Thread.Sleep(New TimeSpan(D, H, M, S, MS)) Thread.CurrentThread.Interrupt() Thread.Sleep(System.Threading.Timeout.Infinite) SiteMonitor.Abort() SiteMonitor.Join() End Sub
Sleeps until a different thread calls Interrupt
USING SLEEP AND INTERRUPT
Sleep is a way for a thread to yield control to the OS. Naming the method Sleep is fairly accurate. You can think of it as the thread taking a nap. During naps, we don t consume many resources; we re still alive, and generally pretty easy to wake up. That applies equally well to threads that have invoked their Sleep method.
There are different versions of the Sleep method. The version we have seen so far takes an integer parameter that indicates the maximum number of milliseconds the current thread should be allowed to sleep. In listing 5.3, the thread sleeps for one second, or one thousand milliseconds. This version passes zero to the Sleep method. When the parameter to Sleep is 0 this indicates that the current thread should yield the remainder of its time slice to the operating system and continue executing on the next time slice. There are times when this is a good idea. The thread watching class we discussed in section 4.5.2 is a good example of when this approach should be used. Instead of calling Sleep with five milliseconds, it would have been better to call it with zero. This would indicate that as soon as the thread had finished the current iteration of inspecting the other thread, it should yield the remainder of the current time slice. If the thread takes longer than one time slice to do its work, it will be interrupted and a context switch will occur. Using the thread watching class, we can see that calling Sleep on a thread causes it to enter the WaitSleepJoin state. This version of the Sleep method accepts a TimeSpan object as its parameter. The TimeSpan object can be created numerous ways and offers an easy way to indicate the length of time that a thread should sleep. One way to create a TimeSpan object is to pass in the number of ticks the span should account for. A tick is the smallest unit of time in .NET. There are 10,000,000 ticks in a second.
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