Does the threads of a single process run in parallel on a multi-core machine on windows XP? Is the behavior same on different windows versions (windows server editions) I have heard that only threads of different processes run in parallel. ...
Hi, I'm having a bit of a problem. I want to display a progress form that just shows an animation on a when the main application preforms heavy operations. I've done this in a thread and it works fine when the user isn't preforming any operations. But it just stops when my main application is busy. I'm not able to put Application.Pro...
Hi, I have a simple silverlight multifile upload application, and i want to provide the user with some feedback, right now its only in a test phase and i dont have the webservice. Somehow i cant get the ui to update: private void DoUpload() { foreach (UploadFile file in fileInfos) { int BUFFERSIZE = 1024;...
I am in the process of teaching myself thread based programming techniques and this question may be way off base... I'm not even sure if this is possible or indeed even the right approach to this problem. Please feel to correct me in what question I should be asking if appropriate. I am trying to have a certain thread deal with an even...
I'm writing a stateless EJB. I had methods like: public String getXxx(final String userId) throws ... { final Query query = em.createNativeQuery(...); query.setParameter(1, userId); return (String)query.getSingleResult(); } Can I cache the Query object instantiating it at load time and using it in a multi-thread environmen...
Let's say I've got a struct that consist of 100 bytes. What guarantees have I got about the following code? m_myLargeStruct = someValue; // copying 100 bytes Thread.MemoryBarrier(); // Executed by another thread, after "Thread.MemoryBarrier" was called by the first thread Console.WriteLine(m_myLargeStruct.ToString()); Does the memo...
Hello, I have created an simple web server, leveraging .NET HttpListener class. I am using ThreadPool.QueueUserWorkItem() to spawn a thread to listen to incoming requests. Threaded method uses HttpListener.BeginGetContext(callback, listener), and in callback method I resume with HttpListener.EndGetContext() as well as raise an even to no...
I have a form that spawns a BackgroundWorker, that should update form's own textbox (on main thread), hence Invoke((Action) (...)); call. If in HandleClosingEvent I just do bgWorker.CancelAsync() then I get ObjectDisposedException on Invoke(...) call, understandably. But if I sit in HandleClosingEvent and wait for bgWorker to be done, th...
In the following code sample, does the memory barrier in FuncA is required to ensure that the most up-to-date value is read? class Foo { DateTime m_bar; void FuncA() // invoked by thread X { Thread.MemoryBarrier(); // is required? Console.WriteLine(m_bar); } void FuncB() // invoked by thread Y { m_...
I'm working with a rather large .net web application. Users want to be able to export reports to PDF. Since the reports are based on aggregation of many layers of data, the best way to get an accurate snapshot is to actually take a snapshot of the UI. I can take the html of the UI and parse that to a PDF file. Since the UI may take up ...
I have recently finished reading C# in depth by Jon Skeet and I'm looking for the next book to read, one that extends a little more "in depth" my knowledge of c# and .NET in general and I'd be open to other kind of books. I've read Code Complete and The Mythical Man-Month, and though I find them both to be awesome, I'm looking more for a...
Hello guys, I am working on a an application which is very simple a navigation controller with a table view when the user clicks a row, he is directed to the details view. However, the details view pulls data from Core Data. i am pulling a relatively large amount of data that takes about three seconds to load. I wanted to add that UIA...
I have a C++ class running in its own thread that needs to execute some javascript in a WebView that's part of a Cocoa app. I have the C++ app call a method in the Cocoa window's controller and it in turns runs the javascript, passing in the data. It seems to work part of the time, but crash a lot of the time as well (somewhere in WebVie...
Hello All, I have a Navigation View with a Table View, when a row is clicked, the row indexPath is passed to the next view. in the Details view viewDidLoad, i am fetching data from Core Data. i use the fetching from the application delegate [appDelegate loadItem:i]; As you can see i am passing one integer only which carries the row nu...
When I write a value into a field, what guarantees do I get regarding when the new value will be saved in the main memory? For example, how do I know that the processor don't keep the new value in it's private cache, but updated the main memory? Another example: int m_foo; void Read() // executed by thread X (on processor #0) { Co...
Hi, I have this class: public class UploadFile : INotifyPropertyChanged { private string name; public string Name { get { return name; } set { name = value; OnPropertyChanged("Name"); } } private FileInfo fileInfo; public FileI...
I've been looking for a way to monitor for specific registry changes in Delphi. Found a solution at about.com: procedure TRegMonitorThread.Execute; begin InitThread; // method omitted here while not Terminated do begin if WaitForSingleObject(FEvent, INFINITE) = WAIT_OBJECT_0 then begin fChangeData.RootKey := RootKey;...
I'm working on an IRC client. I've hit a majors snag which, up until not I've been able to work around. I'll show code below. What's I'm having a problem with is creating MDI child windows within the event handlers of idIRC. For example, if I want to create a new channel form (FrmChannel), I can accomplish this easily by calling it's c...
I have a question about the following code sample (taken from: http://www.albahari.com/threading/part4.aspx#_NonBlockingSynch) class Foo { int _answer; bool _complete; void A() { _answer = 123; Thread.MemoryBarrier(); // Barrier 1 _complete = true; Thread.MemoryBarrier(); // Barrier 2 } ...
i know the way that uses the Control.InvokeRequired() and Control.Invoke(). but i was wondering if its possible to use some other method to alert the ui thread that the Data was changed and then let the ui thread update its controls without using control.invoke(). as far as i remember this was possible before in mfc by sending message...