I am trying to use the .NET Backgroundworker Object in an application I am developing. All the material on the internet say that this object runs in the "background" but nowhere have I been able to confirm that this background thread indeed runs in a "low priority" mode. This question arises because in Windows (I assume) a background ta...
I'm writing some code where the UI thread need to communicate with the background thread doing network communication. The code works, but would it be considered thread safe? I would feel a lot better if someone experienced could lead me on to the right path on this... static Mutex^ mut_currentPage = gcnew Mutex; static array<unsigned c...
I have a code that "sounds" like this: thread 1 now = rdtsc(); for_each_member_in_a_list { if ( member_in_list.deadline() <= now ) { do_something; } } thread 2 now = rdtsc(); for_each_member_in_a_list { member_in_list.updatedealine( foo(now, ...) ); } now while this was working good in the past now with a SMP system...
I'm working on an application that will gather data through HTTP from several places, cache the data locally and then serve it through HTTP. So I was looking at the following. My application will first create several threads that will gather data at a specified interval and cache that data locally into a SQLite database. Then in the...
With reference to the Software Project I am currently working on. I have the below methods that basically move a canvas with a Timer: DispatcherTimer dt = new DispatcherTimer(); //global public void Ahead(int pix) { var movx = 0; var movy = 0; dt.Interval = TimeSpan.FromMilliseconds(5); ...
I am making an application that does some custom image processing. The program will be driven by a simple menu in the console. The user will input the filename of an image, and that image will be displayed using openGL in a window. When the user selects some processing to be done to the image, the processing is done, and the openGL windo...
Hi, I would like to know how threads are handled on the server side using MarshalByRef objects. Given my remoted MarshalByRef class: public class MyRemotedClass : MarshalByRef { public int MyInt; public string MyString; } Client code (single threaded): MyRemotedClass m = GetSomehowMyRemotedClass(); m.MyInt = 5; // Write operat...
I want my app to loop in python but have a way to quit. Is there a way to get input from the console, scan it for letter q and quick when my app is ready to quit? in C i would just create a pthread that waits for cin, scans, locks a global quit var, change, unlock and exit the thread allowing my app to quit when its done dumping a file o...
Can anybody please explain how this could possibly happen? I am completely aware of programming with thread safety in mind and as you can see I am catering for UI updates via a form InvokeRequired check here, everything has been working fine and no changes to break this that I am aware, and now suddenly just as I'm programming other par...
I am developing a multi-threading application, which is deadlocking. I am using Visual C++ Express 2008 to trace the program. Once the deadlock occurs, I just pause the program and trace. I found that when deadlock occurs, there will be two threads called python from my C++ extension. All of them use Queue in python code, so I guess ...
I am doing something like this in python class MyThread ( threading.Thread ): def run (s): try: s.wantQuit = 0 while(not s.wantQuit): button = raw_input() if button == "q": s.wantQuit=1 except KeyboardInterrupt: s.wantQuit = 1 my...
Hi, Given this MarshalByRef class: public class MyRemotedClass : MarshalByRef { public void DoThis() { ... } public void DoThat() { ... } } Client side code: MyRemotedClass m = GetSomehowMyRemotedClass(); m.DoThis(); m.DoThat(); I can have several clients doing the same thing at a the same time. I would like ...
I'm developing a DirectShow application. I encounter a deadlock problem, the problem seems caused by acquire lock in a callback function called from a thread. This is the quest I asked in MSDN forum: http://social.msdn.microsoft.com/Forums/en-US/windowsdirectshowdevelopment/thread/f9430f17-6274-45fc-abd1-11ef14ef4c6a Now I have to avoi...
In a multi-thread app. is there a way to programatically have thread-B check what function thead-A is currently in? ...
I have a scenario where I have multiple threads adding to a queue and multiple threads reading from the same queue. If the queue reaches a specific size all threads that are filling the queue will be blocked on add until an item is removed from the queue. The solution below is what I am using right now and my question is: How can this b...
Hello, concurrent colleagues. I need to be able to trap an exception that might be thrown from a background thread. Let the code speak for itself (it is a bad code) public delegate bool CheckForUpdatesHandler(Uri uri); public class UpdatesChecker { public event AsyncCompletedEventHandler CheckForUpdatesAsyncCompleted; ...
I've read conflicting opinions as to whether every BeginInvoke() has to be matched by an EndInvoke(). Are there any leaks or other problems associated with NOT calling EndInvoke()? ...
I am a bit of a newbie when it comes to windows client programming. I have a background worker that has a DoWork event and a RunCompleted event wired up. If an exception gets thrown in DoWork, I want to make changes to my UI, however, I cant because it is in a different thread. I can communicate the error to RunCompleted, but that doesn'...
Following on from my BeginInvoke()/EndInvoke() question, are there major differences in performance/anything else between Delegate.BeginInvoke() and using QueueUserWorkItem() to invoke a delegate asynchronously? ...
Can you recommend a good series of articles or preferably a book on how to get started with threading in general and in C# in particular? I am primarily looking for the use of threads in console applications and in ASP.Net apps. I understand only the very basics of threads and know that "here be dragons", so want to get a good grounding...