I have no idea, but my app is stalling sometimes completely (not responding to touching the screen) I thought I was following all the rules for threading, but my app is apparently slowing down the Sprint EVO! I have never used an app as slow as my own. I don't get an ANR dialog, though I think I probably should get getting one. I have ...
I know about the Semaphore class in the System.Threading namespace, but I don't see if it allows waiting threads to have different priorities levels. If two threads are waiting for an open slot, is there a way to allow the thread with the higher priority to have the first open slot available? ...
Hi guys, I need an alternative for Dispatcher (.net 3.0) to use for a windows service (done in .net 2.0). Can you give me some idea how to achieve something like that or point me some links? I know that a dispatcher has a SynchronizationContext behind, but I don't know how I can use a SynchronizationContext into a service. If you thin...
Speaking of in-browser (having not much experience with a SL, I can only assume this is a very common usage scenario) SL applications - do they have any programming restrictions with respect to database access and multi-threading? ...
Hello... Here is my code: #include <gtk/gtk.h> static int counter = 0; static PangoLayout* layout; static GdkGC* gc1; static GdkGC* gc2; //**/static GMutex* mu; static gboolean on_expose_event(GtkWidget* widget, GdkEventExpose* event) { gchar the_string[20]; //**/g_mutex_lock(mu); gdk_draw_rectangle(GDK_DRAWABLE(widget->...
When I execute the code below, I get the common exception The process cannot access the file *filePath* because it is being used by another process. What is the most efficient way to allow this thread to wait until it can safely access this file? Assumptions: the file has just been created by me, so it is unlikely that another app ...
I'm writing a perl script to run some kind of a pipeline. I start by reading a JSON file with a bunch of parameters in it. I then do some work - mainly building some data structures needed later and calling external programs that generate some output files I keep references to. I usually use a subroutine for each of these steps. Each s...
I'm trying to understand and if possible tune my read performance from our direct-attached storage. Host : centos 5.4 2 * Intel Xeon E5520 24 Gib of memory gpfs filesystem I/O Scheduler is set to deadline, cfq doesn't seem to improve anything. Storage : 60 2Tb drives hardware raid 60 (6 * 10 drives) 8GB fiber channel connexion ...
I'm not entirely sure how I got to this situation but somehow I'm getting a null ClassLoader from Thread.getContextClassLoader. After reading a little (not much info in the docs nor on google) I got the impression that it's valid for the current thread to have a null class loader, and calls to getContextClassLoader should be checked for ...
Right now i am trying to learn more about java threading, and i have a small question that i cannot find a direct answer to anywhere. Lets say i have two threadsthat both share an object: public class FooA implements Runnable { Object data; public FooA(final Object newData) { data = newData; } public void d...
I recently realized that to avoid nasty exceptions I should check isFinishing in the inner AsyncTask subclasses of my activity. Where else is it a good practice to check isFinishing in an activity? ...
Is there a way to wake a sleeping thread in C#? So, have it sleep for either a long time and wake it when you want work processed? ...
Hey guys, so I have been getting this really weird bug in my android app that I have isolated down to the fact that a handler is not being created. The odd part, is that despite the fact 5 threads are being created, under certain circumstances...only 4 handlers are created. And then the rest of the time, 5 handlers are being created. N...
When a user presses the back key to my first activity, where I start an AsyncTask duringonCreate() that checks to see if buttons should be enabled based on whether or not websites are down. I use an HttpClient to contact www.downforeveryoneorjustme.com to determine if the site is down. When users return to this Activity the phone becomes...
Disclaimer: I'm pretty terrible with multithreading, so it's entirely possible I'm doing something wrong. I've written a very basic raytracer in Python, and I was looking for ways to possibly speed it up. Multithreading seemed like an option, so I decided to try it out. However, while the original script took ~85 seconds to process...
I have code that looks like something like this: def startSearching(self): self.searchingLock.acquire() searching = self.searching if self.searching: self.searchingLock.release() self.logger.error("Already searching!") return False self.searching = True self.searchingLock.release() #some...
Hello Highly there is a problem in this lock but i couldn't understand what is that. I have strong suspicious that below example doesn't lock enough well. So what can be problem ? class example { object locker = new object(); void start() { for (int i = 0; i < 1000; i++) { (new Thread(dostuff)).S...
I have a client connected to a server using twisted. The client has a thread which might potentially be doing things in the background. When the reactor is shutting down, I have to: 1) check if the thread is doing things 2) stop it if it is What's an elegant way to do this? The best I can do is some confused thing like: def cleanup(s...
Can someone be so kind as to give me a concise (general is fine) set of rules for what data/methods can and cannot be accessed from a secondary (non-UI) thread? ...
If I have code like this - long x; x = 0xFFFFFFFFL; If i run this code on a 32 bit machine is it guaranteed to be atomic or is it possible that a different thread reading x, might get an incomplete/garbage value? ...