unit AniThread; interface uses Classes, Windows, Controls, Graphics; type TAnimationThread = class(TThread) private { private declarations } FWnd: HWND; FPaintRect: TRect; FbkColor, FfgColor: TColor; FInterval: integer; protected procedure Execute; override; public constructor Create(paintsurface : TWinControl; {Control to paint on } paintrect : TRect; { area for animation bar } bkColor, barcolor : TColor; { colors … Read more
It’s defined in the Runnable interface : public void run (); 1 solved What is the signature of Run method [closed]
Try this instead: private static void aaa() { Console.WriteLine(“123”); } private static void Start2() { try { Program.t = new Thread(delegate() { Program.aaa(); }); Program.t.Start(); while(t.IsAlive) Thread.Sleep(500); GC.Collect(); GC.WaitForPendingFinalizers(); GC.Collect(); } catch (Exception value) { Console.WriteLine(value); } } solved High CPU With Multithreading In C#
You could do this easily in two ways: Pass a ‘print token’ between the threads using two semaphores: thread 1 prints, signals semaphore A, waits on semaphore B then loops. Thread 2 waits on semaphore A, prints, signals semaphore B and loops. Write in-line, single-threaded code. 1 solved How can I get my threaded program … Read more
Introduction Threaded programming is a powerful tool for creating efficient and reliable applications. It allows multiple tasks to be executed simultaneously, which can greatly improve the performance of an application. However, it can be difficult to get the desired output from a threaded program. This article will provide some tips on how to get your … Read more
No, HashSet is not thread-safe. You can use your own synchronization around it to use it in a thread-safe way: boolean wasAdded; synchronized(hset) { wasAdded = hset.add(thingToAdd); } If you really need lock-free performance, then you can use the keys of a ConcurrentHashMap as a set: boolean wasAdded = chmap.putIfAbsent(thingToAdd,whatever) == null; Keep in mind, … Read more
The solution was simply . Dont run multiple threads with debugger , so if you have Microsoft Visual Studio and you want run a lot of threads , run the program without the debugger ! solved Threads and Multi-Threads issue [closed]
Sorry, but I didn’t find a design simpler than that. You could, make a class that owns both a thread, and a weak_ptr to itself, to be a “holder” that the callable can see it safely, because the callable will still exists even if the object is destructed. You don’t want a dangling pointer. template<typename … Read more
What you are searching for is a busy indicator, take a look at those: Busy Indicator for Ajax Calls ASP.NET Busy Indicator solved how to show a moving circle to show process running on a website [closed]
You are using the wrong timer. The System.Windows.Forms.Timer is made to run on the UI thread. This Windows timer is designed for a single-threaded environment where UI threads are used to perform processing. Your rectangle is not drawn because the Tick event is never fired! Solution: Use instead a timer that is made to run … Read more
The thing is you can not access Ui element in a non-Ui thread. So you must be getting a Runtime exception. You can use runOnUi() or a Handler to do it on Main Thread . Where runOnUi() is a method of Activity class and A Handler allows you to send and process Message and Runnable … Read more
There is no general problem with two threads executing system calls on the same socket. You may encounter some specific issues, though: If you call recvfrom() in both threads (one waiting for the PLC to send a request, and the other waiting for the PLC to respond to a command from the server), you don’t … Read more
Since you want the thread to wait for an answer, I’d suggest creating a question object that has the question text, can store the answer, and has a CountDownLatch for tracking when the answer is available. public final class Question { private final String question; private String answer; private CountDownLatch latch = new CountDownLatch(1); public … Read more
I am trying to print numbers from 1 to 10 in sequential order with two different threads, but output is not always same [closed] solved I am trying to print numbers from 1 to 10 in sequential order with two different threads, but output is not always same [closed]
Every thread in a Java program must have an associated Thread instance, and every Thread “has” a Runnable.* There’s no way around it. It’s just how Java works. You can call Thread.currentThread() from anywhere in your program and it will always return a reference to the Thread object that controls the thread that is executing … Read more