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• Asp.Net - When does it restart the application

  - by Seattle Leonard

  I know that whenever you add/remove/modify any file in the "App_Code", "App_GlobalResources", and "bin" directories that ASP.NET will recompile and essentially restart the application. My question is : "What happens to any threads currently executing durring the change?" Do they finish? Is a Thread.Abort Exception thrown? What happens if the application itself makes a change in any of those directories?

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• What are the tell-tale signs that my code needs to make use of multi-threading?

  - by dotnetdev

  Hi, I am using a third party API which performs what I would assume are expensive operations in terms of time/resources used (image recognition, etc). What tell-tale signs are there that the code under test should be made to use threads to increase performance? I have a profiler and will be profiling the code I write which will rely on this API. Thanks

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• Does PHP have threading?

  - by Thomas Owens

  I found this PECL package called threads, but there is not a release yet. And nothing is coming up on the PHP website.

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• Should I Put Critical Section While Getting Connection from OCCI Environment

  - by sahs

  Hello, I'm writing a multi-threaded application. My worker threads get connection from an environment object as follows:. //EnterCriticalSection(&cs); conn = env->createConnection(username, password, connStr); //LeaveCriticalSection(&cs); For concurrency, should the connection be created in a critical section or not? Does the env need it? And why? Thanks.

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• TerminateProcess and deadlocks

  - by Tony

  Is it real that the TerminateProcess function in Windows could hang because the threads inside the process were stuck in a deadlock? Example: Process A is running under Process B's control, now Process A gets into a deadlock and Process B detects this and decides to 'Kill' process A using TerminateProcess. Would it be successful in killing the hung Process A?

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• What are common uses of condition variables in C++?

  - by jasonline

  I'm trying to learn about condition variables. I would like to know what are the common situations where condition variables are used. One example is in a blocking queue, where two threads access the queue - the producer thread pushes an item into the queue, while the consumer thread pops an item from the queue. If the queue is empty, the consumer thread is waiting until a signal is sent by the producer thread. What are other design situations where you need a condition variable to be used?

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• Thread safety in C# arrays

  - by Betamoo

  Does having 2 different threads : one reading from a C# array (e.g from first location), and another one writing to the same C# array but to a different location(e.g to the last location) is thread safe or not? (And I mean here without locking reading nor writing)

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• Hidden features of mod_rewrite

  - by Owen

  There seem to be a decent number of mod_rewrite threads floating around lately with a bit of confusion over how certain aspects of it work. As a result I've compiled a few notes on common functionality, and perhaps a few annoying nuances. What other features / common issues have you run across using mod_rewrite?

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• Python multithreading, How is it using multiple Cores?

  - by Sabirul Mostofa

  I am running a multithreaded application(Python2.7.3) in a Intel(R) Core(TM)2 Duo CPU E7500 @ 2.93GHz. I thought it would be using only one core but using the "top" command I see that the python processes are constantly changing the core no. Enabling "SHOW THREADS" in the top command shows diffrent thread processes working on different cores. Can anyone please explain this? It is bothering me as I know from theory that multithreading is executed on a single core.

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• Best (or appropriate) WSGI server for this Python script? - Python

  - by RadiantHex

  Hi folks, I'm having quite a problem deciding how to serve a few Python scripts. The problem is that the basic functionality could be generalized by this: do_something() time.sleep(3) do_something() I tried various WSGI servers, but they have all been giving me concurrency limitations, as in I have to specify how many threads to use and so on. I only wish that the resources on the server be used efficiently and liberally. Any ideas?

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• STL container to pop() by priority?

  - by Pirate for Profit

  I'm writing a thread-pool for Qt as QRunnable doesn't handle event loops in new threads. Not too familiar with STL, what would be the best way to pop() something by priority? Priority should probably be a property of MyRunnable imo, but I can always give that info to an STL container when adding the runnable to the queue.

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• Multitasking how to make worker thread gain control after calling infinite loop function

  - by user353573

  assume creating 3 worker threads by pthread_create, in these worker thread routine, each call a simple infinite loop function which do not have a return to do counting how to make worker thread gain control after calling infinite loop function and save the context of infinite loop function for calling in worker thread again?

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• Differences in the different ways to make concurrent programs

  - by dotnetdev

  Hi, What is the difference between: Starting a new thread Using TPL Using BackgroundWorker All of these create concurrency but what are the low-level differences between these? Do all 3 make threads anyway? Thanks

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• Best Books that shows how to use jQuery with ASP.NET

  - by roneden

  I have searched the stackoverflow site to find if someone has recommended any good books that show how jQuery can be used with asp.net controls. All the threads lead to only good jQuery books. Can anyone recommend me a good book that shows how to use jquery with asp.net?

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• Is this technically thread safe despite being mutable?

  - by Finbarr

  Yes, the private member variable bar should be final right? But actually, in this instance, it is an atomic operation to simply read the value of an int. So is this technically thread safe? class foo { private int bar; public foo(int bar) { this.bar = bar; } public int getBar() { return bar; } } // assume infinite number of threads repeatedly calling getBar on the same instance of foo.

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• How can i use a C# dll in a Win32 C++ project ?

  - by Agito

  I am working on a solution, most of its core engine is developed as Win32 C++ (and is Platform independent and is also used on OS X), some time ago we needed to call C++ dll's of core engine from C# and I was able to Load main solution's DLL in C# (by the help of some threads here on SO). but now we have certain things implemented in Managed C# dll and need to use it in Win32 C++ project? (and just function definitions and dll are provided)

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• example for Singleton pattern

  - by JavaUser

  Hi, Please give me a real time example for singleton pattern . Different threads accessing a shared file is singleton or not ? Since each thread access the same instance of the file not individual instances of their own .

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• Threading heap and stack

  - by DJ

  How memory is allocated in case of spawning a new thread, i.e how memory heap, memory stack, and threads are related? I know this is fundamental (.net framework concept) but somehow I am not much aware of this concept.

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• What does composability mean in context of functional programming?

  - by Surya

  What do functional programmers mean when they say a certain thing is composable or not composable? Some of the statements of this sort that I've read are: Control structures are not composable. Threads do not compose. Monadic operations are composable.

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• How do I know that a process has more than 1 thread?

  - by Richard77

  I'have typed ps -ALF and got the following results. Actually there are more to the tow lines that I typed. UID PID PPID LWP C NLWP SZ RSS PSR STIME TTY TIME CMD root 1 0 1 0 1 5900 1644 1 Nov05 ? 00:00:05 /sbin/init root 2 0 2 0 1 0 0 0 Nov05 ? 00:00:00 [kthreadd] I'm supposed to find which process has more than 1 threads. Which column am I supposed to examine? Thanks for helping

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• What the best multi-thread application debugger for C++ apps.

  - by Coredumped

  I'm looking for a good multi-thread-aware debugger, capable of showing performance charts of application threads on Linux, don't know if such a thing exists, perhaps as a Eclipse plugin. The idea would be to track per thread memory allocation a CPU usage as well as being able to interrupt a thread and examine its stack trace, local vars, etc. It does not have to be an eclipse plugin or a free tool, do any of you have heard of something similar?

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• Problem with re.findall (duplicates)

  - by user559385

  Hello, I tried to fetch source of 4chan site, and get links to threads. I have problem with regexp (isn't working). Source: import urllib2, re req = urllib2.Request('http://boards.4chan.org/wg/') resp = urllib2.urlopen(req) html = resp.read() print re.findall("res/[0-9]+", html) #print re.findall("^res/[0-9]+$", html) The problem is that: print re.findall("res/[0-9]+", html) is giving duplicates. I can't use: print re.findall("^res/[0-9]+$", html) I have read python docs but they didn't help.

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• Does OpenCL allow concurrent writes to same memory address?

  - by Wonko

  Is two (or more) different threads allowed to write to the same memory location in global space in OpenCL? The write is always changing a uchar from 0 to 1 so the outcome should be predictable, but I'm getting erratic results in my program, so I'm wondering if the reason can be that some of the writes fail. Could it help to declare the buffer write-only and copy it to a read-only buffer afterwards?

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• stm monad problem

  - by Alex

  This is just a hypothetical scenario to illustrate my question. Suppose that there are two threads and one TVar shared between them. In one thread there is an atomically block that reads the TVar and takes 10s to complete. In another thread is an atomically block that modifies the TVar every second. Will the first atomically block ever complete? Surely it will just keep going back to the beginning, because the log is in an inconsistent state?

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• Applet networking patterns

  - by Kristoffersen

  Hi SO. I have an applet that connects to a server, it receives some commands and based on that it haves to draw (or move) different things. Which patterns should I use? I assume that the network connection and applet should run in two different threads? Thanks, Kristoffer

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