I Am trying to send a signal from a child thread to the main thread in a multi-threaded program (cannot use multi-processes). Unfortunately even after exhausting all the reading materials available...

I'm learning pthread and came across reader writer lock. The scenario is very simple; a global variable being shared by all the threads, reader keeps printing the current value of that same global ...

Anyone knows what kind of UB is this? The following code deadlocks on jthread destruction when built with MSVC 19.29.30148, sometimes it deadlocks after std::cout and sometimes before. This is some...

I am currently thinking about how to design a multithreading system in Java that needs to do some heavy network processing and database storage. The program will launch three basic threads at first...

Why is Bill Pugh's Singleton design pattern thread safe? public class Logger { private Logger() { // private constructor } // static inner class - inner classes are not loaded until they are ...

Here the code which download 3 files, and do something with it. But before starting Thread2 it waits until Thread1 will be finished. How make them run together? Specify some examples with commentar...

I have a simple object @Data @Builder public class Address { private Long id; private String street; } I make delombok of @Builder annotation and I see next code generated @Data public class ...

From the docs - How many workers, DO NOT scale the number of workers to the number of clients you expect to have. Gunicorn should only need 4-12 worker processes to handle hundreds or thousands of ...

Here on stack overflow I've found the code that memoizes single-argument functions: static Func<A, R> Memoize<A, R>(this Func<A, R> f) { var d = new Dictionary<A, R>(); r...

I have seen several other questions on the forum that talk about this schedule() function, but my question is a bit different. I have seen several discussions and literature about it's theoretical,...

Consider the following two snippets of code where I am trying to launch 10000 threads: Snippet 1 std::array<std::future<void>, 10000> furArr_; try { size_t index = 0; for (auto &...

If I have two threading.Event() objects, and wish to sleep until either one of them is set, is there an efficient way to do that in python? Clearly I could do something with polling/timeouts, but I...

I'm building a Python API around a black box .NET DLL using Python .NET. The DLL is only doing networking operations. The DLL require me to run a windows message pumping loop, otherwise the network...

In theory, the JDB (java debugger) allows for a single thread to be killed. In practice, is it possible? Here I attach jdb to my JVM, which has an agentlib at port 8000: $ jdb -attach 8000 > ...

All, Referring to the question in std::lock still caused deadlock I still couldn't figure what is the problem in the below code. Can somebody please explain the problem and how to fix this? Why do...

I have been experimenting with a simple true/false sharing benchmark, which does regular load+increment+write on a pointer. Basically this: static void do_increments(volatile size_t *buffer, size_t...

I am right now developing a PyQT5 application an use multithreading to avoid freezing of the GUI. Unfortuneately the Visual Studio Code debugger does not stop on breakpoints inside the executed thr...

I'm embedding the python interpreter in a multithreaded C application and I'm a little confused as to what APIs I should use to ensure thread safety. From what I gathered, when embedding python it...

How do I get a thread to return a tuple or any value of my choice back to the parent in Python?

My ThreadPoolExecutor is failing to create new threads. In fact I wrote a somewhat hacky LinkedBlockingQueue that will accept any task (i.e. it is unbounded) but call an additional handler - which ...

I have a list of work-unit and I want to process them in parallel. Unit work is 8-15 seconds each, fully computational time, no I/O blocking. What I want to achieve is to have an ExecutorService th...

I am using Threading module in python. How to know how many max threads I can have on my system?

As DateTime cannot be declared as volatile, is this right? private DateTime _time; public DateTime Time { get { Thread.MemoryBarrier(); return _time; } set { _time = value; Thread.MemoryBa...

My app is working well and I didn't get this error on Xcode 13.4, Is it Xcode 14 beta bug or I'm doing some bad threading?! Thread running at QOS_CLASS_USER_INITIATED waiting on a lower QoS thread ...

When I am debugging within Visual Studio, for some reason when debugging a certain thread, Visual Studio will just jump around to different threads. How do I change to behavior so it sits on the s...