Multi-threading is how work performed by a computer can be divided into multiple concurrent streams of execution (generally referred to as threads).
2
votes
0answers
24 views
Cancelling a job in ExecutorService
I wrote code which demonstrates how to cancel a job in Executor:
...
2
votes
1answer
38 views
Controlling parallel jobs with condition_variable
I'm trying to set up a system where I can have an arbitrary number of parallel tasks, all of which wait for a go signal, do their work, and then stop while a ...
-2
votes
0answers
13 views
increase clarity of output by assigning unique ID to individual thread [on hold]
I'm new to Java and is trying to learn the concept of High level concurrency. I saw the code below at Java tutorial Oracle. However, when I ran the code, the output did not indicate which thread did ...
1
vote
0answers
40 views
1
vote
1answer
55 views
Implementing the Actor-Model in C#
After learning the basics (isolated state, communication and computation) of the the Actor-Model I I wrote my own implementation and I'm ready for a through code review.
You will be able to see that ...
1
vote
1answer
41 views
Limiting the amount of Calls to a Server
I have a server side operation which takes a percentage value from 0 - 100. The user controls this percentage using a SeekBar on the android client.
Time-wise the ...
1
vote
1answer
44 views
Executor Service with Blocking Queue
I did not find a single working implementation of using an Executor Service with a Blocking Queue. So , I have come with with a working sample. Thoughts?
...
4
votes
1answer
38 views
Parallelizing an algorithm with OpenMP using a dynamic work queue
I'm looking for comments on the design, correctness and performance (not so much style) of a dynamic work queue for OpenMP worker threads.
I have an algorithm that can be thought of in terms of some ...
4
votes
1answer
78 views
Loop through List multi-threading to ping hostnames
I am new to Multi-threading. I have had a go at writing some code that loops through an ArrayList, gets a hostname and then pings the hostname. If the hostname is ...
0
votes
1answer
32 views
Kill/stop a busy FutureTask Thread
I am trying to get an Auth ticket from a 3rd party server. I am using FutureTask to perform the task. However, if I don't get response from the server after 10 seconds, I want to timeout the call. At ...
6
votes
1answer
52 views
Cancellable UI loader
I'm playing with async/await, but I have yet to discover a standard method to safely cancel an intensive task. I have tested the following, and it works exactly as intended, though I remain unsure if ...
4
votes
1answer
156 views
Starting and stopping a thread for a command handler
I built an application class that should be runnable as a Thread and it would be nice to hear opinions of Java developers to improve my coding style.
...
3
votes
1answer
158 views
Background task with instant abort capability in c#
I'm looking for a better way to make a background operation with abort/cancel support. Right now I use this approach:
...
5
votes
3answers
105 views
Simple Java task scheduler
The task is pretty simple: implement a timer that executes tasks when the next event takes place. I created a task scheduler based on a priority queue.
A new thread is created for ...
1
vote
1answer
64 views
Printing odd and even numbers with two threads
I would like to refactor this code printing odd and even numbers with two threads considering agile practice:
...
6
votes
2answers
109 views
std::once_flag and std::call_once implementation
I'm implementing std::once_flag and std::call_once for a particular MinGW build where they are not available, using only stuff ...
8
votes
2answers
150 views
Command line IRC client
I made this IRC client ages ago in Python, and thought I'd revisit it for Python 3.5 (I'd like to play with asyncio). Before I start, I'd like to have an overall design review about this.
Known ...
5
votes
2answers
65 views
Multi threaded Producer Consumer with bounded buffer
I've developed the following multi-threaded code and would like a review. It is supposed to be implementing the Producer-consumer problem as defined here.
I have multiple consumers and one producer. ...
3
votes
2answers
164 views
Handling events in a multi threaded environment
I have a service that raises multiple events, some of them can be raised at the same time. I need to process those events and run a potentially long running method based on the event arguments.
What I ...
5
votes
1answer
61 views
Dining Philosophers using C11 threads
I wanted to try multithreading out in C, so I did Dining Philosophers using C11 threads with the approach of having one of the philosophers left-handed. Any suggestions?
...
0
votes
1answer
94 views
Java MultiThreading using wait and notify - follow-up
After following the tips from @VoiceOfUnreason on my previous question, I want to post the revised code.
The purpose of the code is to simulate a Shop and a ...
2
votes
1answer
77 views
Java MultiThreading .wait() .notify()
I have been working on a long project trying to understand the basics of multi-threading. The application is supposed to simulate a Shop and a Customer which share a Box and a PayPal account.
...
11
votes
2answers
71 views
Multi-threaded Command Processor
I have written a class that is intended to execute a unit of work to be run in a separate thread. The intended use case for this class is running business logic off of the user interface thread so as ...
4
votes
1answer
77 views
Task Scheduler for small interval and one number of start
Scenario:
I want a task scheduler that enables my application to schedule some tasks in small time interval. I want to use it in my socket server application. For example, when the user connects to ...
7
votes
1answer
63 views
Server-side of a chat application
I have written a server-side and the client-side of a chat application. I would like to improve it and I am unsure about my server construct and have absolutely no idea if there is a better way to do ...
7
votes
3answers
474 views
Measuring performance of code using StopWatch
I have created a StopWatch class to measure the performance of any code. I use this StopWatch code in any of my multithreading projects as well.
...
6
votes
1answer
62 views
C++11 version of Windows EventWaitHandle
I don't know C++ at all, but for the heck of it I tossed this together because I was talking with someone about C++ and was given the impression there is absolutely nothing quite like the windows APIs ...
7
votes
2answers
66 views
Updating resources while avoiding race conditions
I am writing a utility class for a game client. This class has two main functions: connect to a game server and retrieve the current game revision, and retrieve a "recipe", which is basically ...
5
votes
1answer
121 views
C# - Make the static class thread safe [closed]
I have a simple class that I use to logging errors and other informations from my applications.
I wondering what will happen when 2 or more threads of the same application would like to log something ...
1
vote
0answers
27 views
ByteBuffer Performance with Java NIO2 AsynchronousChannelGroup.withFixedThreadPool
I have a socket which will be receiving more than 100 TPS, so I need the reading to be as fast as possible. In this socket, I read the info I need to build a String and check if it matches a regex. I ...
5
votes
1answer
92 views
Handle concurrent request by waiting the result of an already running operation
I need to handle concurrent request by waiting the result of an already running operation.
Requests for data may come in simultaneously with same/different credentials.
For each unique set of ...
17
votes
3answers
318 views
Synchronous / asynchronous REST client
I have working code with original design, and now I had a slight design change so trying to code review that as well. I already had code review on my original design here.
Original Design:
I am ...
10
votes
3answers
434 views
Multithreaded Mandelbrot Generator Ver 2
Update: Version 3 is here.
My first version was an answer I provided to EBrown for his original post titled "Multithreaded Mandelbrot Generator". My answer had many good things in it, but I felt ...
1
vote
0answers
11 views
Race condition while reading N sheets of one excel workbook using different threads [closed]
There is an excel work book of 7 sheets each with 65000 records. I am using 7 worker threads to read each sheet in parallel and process them thereafter with no write operation involved. For small file ...
4
votes
1answer
80 views
Calling a method in parallel which returns the future
I have an async method which calls my Task class while my Task class does all the work:
...
2
votes
0answers
42 views
N Processing connect to a single process: Socket Programming
The idea of my program is to use pthreads, semaphores, posix shared
memory, and sockets to create an environment where N processes
(that we will refer to as the children) can connect to a single
...
4
votes
3answers
199 views
Finding prime numbers in user specified array
I have a program that searches for prime numbers in an array specified by the user. The program starts by asking how big the user wants the array to be, then asks how many threads to split the ...
2
votes
2answers
58 views
Ensuring that events raised by system.diagnostics process class happen in the parent thread
I'm quite new to threading primitives in C# and was hoping you might be able to suggest improvements to this. I need to ensure that the XXX call below happens within the calling thread (XXX is a ...
2
votes
1answer
80 views
Multithreading fitness calculation of a sequence in a math function
I wrote this program to calculate a value from an energy function from a sequence of 1s and -1s. The problem here is to find the lowest possible fitness for a function (note that this is original ...
3
votes
1answer
113 views
Monitor, read and display data from a dynamic log file
I am developing a plugin for intellij that basically monitors a log file and displays the data in a tool window within the IDE in real-time. I have managed to get it working but I would like to know ...
6
votes
1answer
131 views
Priorizatable command queue
This code consistently executes commands with a given priority. How can I to improve it?
...
3
votes
0answers
53 views
Self-stopping started and bound Android service
I've written a small Service class that contains a thread pool so that it can process multiple tasks in parallel. The kicker is that is also allows clients to bind ...
5
votes
1answer
90 views
Simulation of Multiple Producer Consumer
I am trying to implement the Multiple Producer-Consumer problem. I have made the buffer as the lock to maintain consistency of the system. Does this system actually implement multithreading? How can I ...
3
votes
2answers
39 views
Single reader - multiple writer waitable lock-free unreliably ordered stack
The main body of code is located here. In the code linted_error is a platform specific type for error codes. As well, as an optimization the code can use Linux ...
1
vote
1answer
53 views
JavaFX await implementation
I'm debating trying to take a crack at getting something similar to C#'s async-co-routine like nature over on JavaFX.
This is technically feasible since the Quantem toolkit exposes the ...
0
votes
0answers
39 views
Custom connection pool : performance
I have a project, that creates a custom DataBaseConnection pool as below:
...
4
votes
1answer
87 views
Simple Python chat
I am working on a simple console chat in Python. I started from this Winforms application, removed all the forms (so that the chat could run on Windows and Linux) and did some refactoring (the "click ...
-5
votes
1answer
165 views
Blinking console start menu
gotoxy() allows you to place the blinking text wherever you want. I wasn't able to get it to behave the way I wanted, so you will notice I had to insert a bunch of ...
2
votes
1answer
117 views
Multithreaded Webcrawler in Java
I am working on a multi-threaded webcrawling program in Java. Each WebCrawler starts at a root page and repeatedly extracts new links and writes them to a database. ...
3
votes
1answer
39 views
Synchronization algorithm for deterministic context switching between threads
Curious how sqlite3 would handle different race conditions in a multithreaded environment, I created a simple module called deterministic for serializing the ...
