I need your help for using this method: for (int i =0; i<dt.count; i++) { process... sleep(3000); } int sleeptime=0; private void timer2_Tick(object sender, EventArgs e) { for (int i = 0; i < mylist.Items.Count;) { listBox1.Items.Add(mylist.Items[i].Name.ToString() + "starting..."); sleeptime = int.P...
I have only done "GUI" database access in Delphi with DbExpress components, but now I'd like to execute one query on background. I read some where that TSQLConnection is not thread safe and I have to create new connection for each thread. I see that there's CloneConnection in TSQLConnection, but help claims that new connections are owned...
Hello everyone, Here is my sample program for web service server side and client side. I met with a strnage performance problem, which is, even if I increase the number of threads to call web services, the performance is not improved. At the same time, the CPU/memory/network consumption from performance panel of task manager is low. I a...
i got an object and in that object i start my thread (for loading doing some url loading) when i have a return of my data i call a selector to perform on the main thread. works fine if i call it the first time , second time it crashes ( no specific error) [NSThread detachNewThreadSelector:@selector(doThread:) toTarget:self ...
Hello everyone. I am having trouble with something i wanna do. I have some big forms which take some time to create. To make the app load faster i thought of letting the forms be created in a thread which is created at main form's OnCreate event. The thread has a FApplication field of type TApplication which obviously is the Application...
In a windows form application what is the impact of calling Thread.Sleep(1) as illustrated in the following code: public Constructor() { Thread thread = new Thread(Task); thread.IsBackground = true; thread.Start(); } private void Task() { while (true) { // do something Thread.Sleep(1); } } Will...
I would like to use my multi-threading programming skills (I got skills), but I realize that that is not enough. My threads may still compete for the same core if the operating system is not aware of the potential. What OS/compiler/library combination can I use on Intel Xeon architecture to thread to the cores? ...
I am debugging an application that I suspect is getting deadlocked and hanging. However, this only occurs every few days, and it never happens on my computer so I can't hook a debugger up to it. Are there any utilities or methods I can use to query the running application and find out what methods/locks/whatever it is deadlocked on? Upd...
Is there a way to turn off multithreading or limit the number of cores used by an F# app? I'm aware this wouldn't be done in a production environment but I'm curious if I have to actually install the application on a single cored system in order to see how it would perform. ...
Simple question i belive, is outputdebugstring(pansichar('')); Thread safe? I/We have been using it in threads for debugging, and i never occurred to me if i should be doing it a different way. (delphi7) ...
I made a software that loads external module made by clients. This software is supposed to be HA (High availability) meaning it CAN'T be allowed to crash. For that purpose, I created a class which creates a thread, run the client module function in it, and returns. The class allows a certain time to execute the function, and if it take...
Hi, I am developing a program that use DirectShow to grab audio data from media files. DirectShow use thread to pass audio data to the callback function in my program, and I let that callback function call another function in Python. I use Boost.Python to wrapper my library, the callback function : class PythonCallback { private: ...
I have a networking Linux application which receives RTP streams from multiple destinations, does very simple packet modification and then forwards the streams to the final destination. How do I decide how many threads I should have to process the data? I suppose, I cannot open a thread for each RTP stream as there could be thousands. S...
I use Indy 9 with Delphi 5. In my application I want to communicate with a network device via UDP. So I use UDPServer comp. in a class which is derived from TThread. When I write similar to the following code then CPU usage is 100%. in the thread : while not terminated do begin if GetMessage(Msg, 0, 0, 0) then begin if Msg.messag...
Note: Using raw Win32 CreateTheard() API No MFC An interface is simply a pointer to a vtable Question: How to pass an interface pointer to a thread? Illustration: IS8Simulation *pis8 = NULL; ... CoCreateInstance( clsid, NULL, CLSCTX_LOCAL_SERVER, __uuidof(IS8S...
Is simply enumerating a .NET Dictionary from multiple threads safe? No modification of the Dictionary takes place at all. ...
How can I make a modal JDialog without buttons appear for the duration it takes a Runnable instance to complete and have that instance update a progress bar/message on that Dialog. Clearly spaghetti code might be this working, but I'm looking for a clean design if one exists. Thanks. ...
My TextBox won't update! I am using it as a Log to update what other things are doing... Form 1 code: using System; using System.Drawing; using System.Collections; using System.ComponentModel; using System.Windows.Forms; using System.Data; using System.IO; using System.Data.OleDb; using System.Collections.Specialized; using System.Tex...
Hi, I need to make an existing app thread safe. Due circumstances (see below), I decided to use one single ReaderWriterLock for the entire graph of business objects. All methods/properties must look like these: public int MyReadOperation(string inputParam) { rwLock.AcquireReaderLock(10000); try { // do all read operation...
Multiple clients are concurrently accessing a JAX-JWS webservice running on Glassfish or some other application server. Persistence is provided by something like Hibernate or OpenJPA. Database is Microsoft SQL Server 2005. The service takes a few input parameters, some "magic" occurs, and then returns what is basically a transformed ver...