[multithreading] Forum Topics

Hi everyone, I am working on an app and trying to create a corrector and I am using keyboard module for the correction. I have created a class, which reads pressed events and displays them to screen, and its action are dependent to a variable passed to the constructor. If …

Hi all, So before I went and posted ~800 lines of code, I have 2 questions: 1: What is the preferred way for us to post "complex" C++ (of course, this is just a .h, .cpp, and main cpp but it's still a lot of lines) that wont just be …

Hello. As from the topic title, i am trying to work a multithread GUI where the progress bar indicates the running process completion (like we always see when we are installing/uninstalling/downloading). I've read a couple of written tutorials and some other forums discussions regarding the progress bar and multithreading. I've …

I am trying to learn Volatile keyword in Multi Threading and I came across this statement: *Volatile is preferred in cases when one thread reads and writes a shared variable and other threads just read the same. Whereas if there are more than 2 threads performing read and write both …

I am trying to understand the SynchronizedMap and I ran the below code. I get the below Output with an exception. According to my understanding the exception is caused when the get() methods are trying to access the syncmap when a thread is still executing a write on the map …

0 down vote favorite I have created a network scanner, that looks for a specific port on a range of IP's. I would like to thread the application but I am getting and error message ERROR: for worker in range(network.hosts): TypeError: 'method' object cannot be interpreted as an integer Now …

I have two forms the first FrmRecipe.vb form has all my calulations and functions in it the second FrmReports has a crystal report viewer with loads of reports. I am trying to call the report as a thread so that the main from is still working however when the treads …

Hi, I got multiple threads in different classes created in this manner: private ThreadStart someName_TS; public Thread someName_Thread; public void someName() { someName_TS = new ThreadStart(someNameThread); someName_Thread = new Thread(someName_TS); someName_Thread.Start();} } private void someNameThread() { while(!Shutdown) { //Do heavy work } } The heavy work is set to a …

Hi Dw. I'm deeply in need of your help, I'm having a problem that is giving me a very serious problem with my code. My program is a multithreaded program and its a TCP/IP based application. Client has no problem, only a server that is being so weid to me …

Hey, I have been reading Java oracle tutorials. I read this thing. Suppose, for example, class MsLunch has two instance fields, c1 and c2, that are never used together. All updates of these fields must be synchronized, but there's no reason to prevent an update of c1 from being interleaved …

Hello, Please tell me how to implement multi threading in C++ on Ubuntu 10.10. The compiler I use is GNU 4.5.2. I have some knowledge of multi-threading in Java. Explain with some codes if possible. Or please give the URL of any useful stuff

I'm using Excel interop and it seems that this functionality needs to run in the User Interface thread. So I execute that from the ProgressChanged backgroundworker event. Is there a way to have the dowork event (that invoked the progress changed event) interrupt execution until the ProgressChanged event is finished? …

I'm trying to add a progress bar to a working theaded program that uses a cancelation token too. The structure of the program is: I have a button "BeginButton" that calls the function "MyFunction()". The function runs in another thread and a cancellation token listens if I press a Cancel …

I have a Windows Forms application (not WPF) in which from the main form (UI thread) I am creating a separate thread to perform a long period of test execution. The idea is that the user starts the testing by clicking a button on the main form; when the user …

i write a program its output is below G:\Java\Multithreading>java NewThread Child Thread Thread[main,5,main] Main Thread 1 Child Thread 1 Main Thread 2 Main Thread 3 Main Thread 4 Main Thread 5 Main Thread Complete Child Thread 2 Child Thread 3 Child Thread 4 Child Thread 5 Child Thread Complete in …

when we create a thread like this class Run implements Runnable{ public void run(){ //You code } } class Helloworld{ public static void main(String args[]){ Thread t1=new Thread(new Run()); Thread t2=new Thread(new Run()); } } in above code thread t1 and thread t2 is creating in `main()` method its mean …

Hello all, My question is hopefully particular enough to not relate to any of the other ones that I've read. I'm wanting to use subprocess and multiprocessing to spawn a bunch of jobs serially and return the return code to me. The problem is that I don't want to wait() …

Hey guys, I'm interested in learning about simple multithreading in C++ for Windows. Does anyone have any reccommended tutorials/links thats quite good?

I am on OSx and I am trying to exit the program by pressing CTRL+C. but it seems like even if I have a signal handler registered in main thread it doesn't exit while the thread is executing on pressing CTRL+C. Here is a piece of cake where I am …

I am trying to establish a pause and play communication between threads.I am spawning two threads for two forms at the startup, one is the mainthread which is for mainwindow and second thread of form2, var thread = new Thread(ThreadStart); thread.TrySetApartmentState(ApartmentState.STA); thread.Start(); private static void ThreadStart() { Application.Run(new SecondForm()); // …

Further along in this code I'm trying to access processRow, which is of type DataRow, but I get a RowNotInTableException This row has been removed from a table and does not have any data. In an attempt to figure out when this data is getting deleted, I added a bunch …

I was reading through Javascript overview on a webiste that stated following: 1) JavaScript can not be used for Networking applications because there is no such support available. 2) JavaScript doesn't have any multithreading or multiprocess capabilities. My Questions: 1) Which kind of 'Networking Applications' are we talking about? 2) …

In a past prac. exam for an algorithm course I'm doing is the challenge below, and their are no solutions but it seems like a really interesting one to solve. Can someone please help and point me in the right direction, I would like to try this on my own, …

I've been asked to edit the code in this post http://www.daniweb.com/software-development/java/threads/455560/java-recursion-brute-force-sim so that it "Runs the function as a thread which wouldn’t then hang the program whilst it’s waiting for the result". I've looked it up, but I'm struggling to apply it to this program, any tips?

can anyone give me some good references or links or some guidelines to start with this ? i need to learn this. like i want to know how can i implement malloc, calloc, realloc etc. for this thing also, what do i need to learn firstly ? thanks. any kind …

Hi Folks, I am writing an app that involves Client -> Server -> Client communication (one way traffic). I have my data transmitted from client A to the server, simple to test, just print to console, however, I'm trying to test to see if the data has been sent on …

Hi to all, I'm using the WIA Aut. Library [url]http://www.microsoft.com/downloads/details.aspx?familyid=a332a77a-01b8-4de6-91c2-b7ea32537e29&displaylang=en[/url] , trying to capture photos from 5 digital cameras (Nikon D90) USB-connected to my pc. Now, I partially achieved my goal, what I do is: - loop through the attached devices, connecting to every camera; - fotocamera.ExecuteCommand (WIA.CommandID.wiaCommandTakePicture) ; - …

Still playing with multi-threading and Prod-Con, at this point I've been at this for days. Would love some help debugging; thanks in advance. http://pastebin.com/jhHB9kTY - Main http://pastebin.com/BZSspf3x - Consumer http://pastebin.com/ndzAADJz - Producer http://pastebin.com/p7YdzH1D - Product http://pastebin.com/rxs3WzDT - Message http://pastebin.com/JR5ywgz1 - Utiliy 2 Producers, 4 Consumers Essentially Producers push a message …

What is the way that need to be implemented in java to make a server broadcasts a voice to multiple clients, instead of broadcast voice only to one client? for example I am doing a server which can broadcast voice to multiple clients at the same time, now my server …