Multithreading Questions

If a creates thread b and c with pthread_create, can b call pthread_join on c (assuming the thread_id

While experimenting with c11 threads.h and mutexes to synchronise a network thead and a main thread i started using following procedure:

I am trying to create a simple socket connection of a client and a server. i wrote something very basic, following

Lets say thread 1 has locked the mutex and does some work. if thread 2 calls:

Code looks like below: class workers1(thread): def __init__(self): thread.__init__(self) def run(self): #

How can i see the number of threads in a java process?

I am working on a building a server in c which not only listens for incoming connections, but also provides me with an interactive shell.

I was trying to observe a basic openmp based parallelism with the following code, #include<stdio.h> #include<omp.h>

Starting with windows vista, every application automatically gets a

I'm coding in c on ubuntu. i need to write a thread called for example "timeredthread" that do some operations in a critical

I'm coding in c on ubuntu. i have more than 2 threads like this: void * thread(void) { retry:

I want to add 1 to a number(0) for 10 billion times. i tried two approaches - use a single thread (main thread) to do the work.

I am attempting to edit a structure's member value(s) within single/multiple threads on windows, consider the following example:

I'm working with openmp and would like to share variable that's declared inside scoped block between threads. here's overall idea of what i'm

I'm wondering what is the "best" way to make data thread-safe. specifically, i need to protect a linked-list across multiple threads --

I have many jmeter scripts that are testing different scenarios and i want to create a configuration file for some common values across my

Running the program as $ omp_num_threads=4 ./a.out limits the number of active openmp threads to 4, as

Say if i have the following c code: int my_global_arr[100]; or more

I have a task that includes this concept and i have no idea how to implement it. the basic idea is we have a movie theater that has x seats

Is there a way to get the list of currently running threads in objective-c? i'm mostly interested in getting the nsthreads objects, cause i want

I want to get a list with all the threads (except the main, gui thread) from within my application in order to do some action(s) with them. (set

I'd like to make sure that a thread is moved to a specific cpu core and can never be moved from it by the scheduler. there's a

Someone at work just asked for the reasoning behind having to wrap a wait inside a synchronized. honestly i can't see the reasoning. i

I am aware that you can lock an object in c# using lock but can you give up the lock and wait for something else to notify you that it's changed

I have few asynchronous tasks running and i need to wait until at least one of them is finished (in the future probably i'll need to wait util m

Intel's threading building blocks (tbb) open source library looks really

I use the tidcmdtcpserver component of indy 10 to realize my client-server application. the problem is that the request from clients can be fairly

What libraries exist for other programming languages to provide an erlang-style concurrency model (processes, mailboxes, pattern-matching receive,

I'm using golang, i'm trying to make this program thread-safe. it takes a number as a parameter (which is the number of consumer tasks to start),

Suppose there is one thread and it has a sequence of methods to be executed: public void task(){ method(); method();

I have a c# singleton class that multiple classes use. is access through instance to the toggle() method thread-safe? if

I am re-factoring some code and am wondering about the use of a lock in the instance constructor. public class

I posted a similar question to this one a few weeks ago where i had trouble finding the data race in my n-queens program using pthreads in c.

Okay, here's the scenario. i have a utility that processes tons of records, and enters information to the database accordingly. it works

This is a theory question, i previously thought that in nodejs expensive tasks like i/o, network,... will be executed on a worker in

What i want are 5 threads that print something indefinitely. i used the waitformultipleobjects api to wait until the threads finish

To start, i'm aware this looks like a duplicate. i've been reading:

I have a node.js application running an express server and a

i have a list of filenames and use it to generate string which will be the new variable to store dataframe. the code below it's not

I have robot files inside a directory i need to run all the robot file inside it in sorted order. below is my code. is it right code or

I have 2 functions def print_out(string): typing_speed = engine.getproperty('rate') #wpm

For an mcmc implementation, i want to calculate the covariance tensor c in numpy. working single-threaded code the distance

Idea: i want to highlight some days in the calendarpickerview to indicate that user cannot choose them.

I want to process a list with a limited number of threads, i want them to take turns, until the list is empty. i tried the following

I want to read an nfc tag until the device moves away from the nfc tag. then i want to do some activities. i have managed to do this using a while

I am using threadpoolexecutor to execute a function which causes an error. when an error is caused within a thread (and its not

I'm making a program that automatically enters to a website and login(basically using selenium and chrome webdriver). user can type own

Are there any solution we can retrieve salesforce data from python with more than 2000 records for each chunk? i have used rest api to retrieve

I want to measure how much time it takes to finish running the code with multiple threads in python. if i put join inside the loop, it

I want to run two functions in parallel which print two lists in parallel. but what i get is one list, being printed after the other list has

I want to make a real time face recognizer with azure cognitive service's face api. but the api calls takes so much time. what concept should i

I am using the keyboard and mouse modules to record user interaction with our software so that we can have some high level gui tests. currently i

I have a program that uses multiple threads to brute force the decryption of some encrypted string. the main thread has a channel, and the sender

I am trying to create my own implementation of android asynctask. for that i created an abstract class which extends thread class. i declared

I used the threading.lock() not to threads access to the shared resource at the same time. but, in my code case, it doesn't work. i know

I am trying to do feature extraction for my dataset using multiprocessing, each processor for each subject. i have 12 logical processors , and i

This is maybe a recurring question but i found conflicting answers and i'm now confused as to which of them is the correct one. i thought

I wrote a small python script using python's threading module for multi-threading. the target function that gets called by

I'm currently developping an android app which is accessing to an online api. i have a class dedicated to this task, and another class that just

I once came across this appexecutors class from some github sample project but i forgot where. i just found it very handy as it does

I'm trying to get a hang of multi-threading in android. my aim is to send data from the main thread to a worker thread. i have a main

Background: i'm using as raspberry pi rev 2 b to run a nature sound white noise generator of sorts that will randomly play audio

I've written a code to create a new account using firebase auth: public static int signup(string email, string password) {

How to find out if i am running out of threads in android/kotlin? i am building an app where i need to load a lot of data from a remote api. i add

I have an interesting task, but i was even confused in learning workers. there is an array of dimensions of 10-30k objects. i want to break it

I have thread code block which basically displays progress bar for 2 seconds then shows a recycler view. i wonder if there is more proper way to

In python 3.9.10, i am stumbling on the following very unsettling behaviour: class mythread(threading.thread): def run(self):

I have the below code but i'm not understanding why the results aren't printing out correctly. i'm allocating val to be the size of the number of

I am working on a game project. i want to associate each view of my game to its respective thread and then update the view according to the logic

New to python. i am trying to create multiple consumer for a rabbitmq client. i am using pika and trying to do with multiprocessing. it seems

Consider the following java code on android. i start threads in a for loop. inside the thread, i am invoking a method with parameters that are

Assume i have a function that i call in a multi-threaded environment like below: from multiprocessing.pool import pool as

I am trying to use a semaphore in python to block the execution of a thread, and release the semaphore in another thread depending on some

Typical use for asynctask: i want to run a task in another thread and after that task is done, i want to perform some operation in my ui thread,

I have a locked conditional variable, which is in waiting state. i want to notify it from a separate thread using a timer. the lock is acquired

I have a node application using koa. it receiving webhooks from external application on specific resources. to illustrate let say the

I have an android service that has a set of operations : myservice.java public class myservice extends

I run several threads concurrently using concurrent.futures. all of them are necessary to run successfully for the next steps in the

Consider this code below, i'm trying to use executors.newfixedthreadpool(1).ascoroutinedispatcher() to create a single thread

Previously i asked this question in a single threaded situation, and was given an answer that worked in that situation

Like i need to check whether a username already existed in database, and the program won't continue until response arrives.

I am facing a situation where multiple threads are trying to insert data to the same table in mysql, **will it be ok without explicit handle it?

I'm trying to setdata() of my qabstracttablemodel (which is connected to qtableview) from another threading.thread. data in model changing as

So i have this node application running on ubuntu. and i noticed that there're lots of threads showing up form pstree -a

I've a small android library which handles a serial port, it has basic functionality like open, read, write and close. i have made an

I'm currently working on a gui where the user inputs data and clicks on a button to run a function that draws a canvas. the function that

Why the below code does not print i just woke up import java.util.concurrent.completablefuture; public class

I have an android client app that sends some data to a server in python, where the python server is supposed to run a long time-consuming

I'm attempting to create a simple threaded server in python. when making a call in a browser it seems that two requests are made, which cause the

I'have been trying out the module "tiny-worker", but i feel that it's pretty slow to communicate between a worker thread and main thread using

An exception is raised in threading._wait_for_tstate_lock when i transfere hugh data between a process and a

I'm trying to set up a web service that processes a rendering in background, which takes a minute. while the rendering is in progress i want the

I'm trying to build semantic segmentation model in keras. since i use a custom data, i decided to write a custom generator to feed it to the keras

My app was recently rejected by apple for the following: exception type: exc_crash (sigkill) exception codes: 0x0000000000000000,

I use some multi-threading in my python application. i want to know what happens to a thread object after it finishes executing the "target"

Suppose i have something like this : import threading import time _finish = false def hang(): while true: if

I'm trying to get this simple test to create a nested thread inside another thread, but it keeps failing. tried removing this nested function and

Does the python thread safe queue use the gil, or does it use

Hello the masters of c and c++. i am trying to get mouse wheel data in while loop using read function. i am in ubuntu 20.04 and using c