All Questions
4,918
questions
1
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0
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39
views
How to handle error creating threads in a loop
I'm into the Philosophers project, it is about handling threads and mutexes. For the project I need to create several threads, each thread runs a routine function and accesses shared resources. I ...
0
votes
0
answers
63
views
C program for calculating pi using pthread doesn't give a correct approximation
Below is some code I made that uses pthreads that calculates an approximation of pi.
#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>
long num_terms;
double sum = 0.0;
...
1
vote
1
answer
65
views
Thread asynchronous waiting signaling
I need a C code for a program which N threads can communicate with eachother.
each thread id can wait for whichever thread id it wants.
each thread id can signal which ever thread id it wants.
they ...
- 15
2
votes
2
answers
134
views
Repeated short identical parallel jobs
I have an algorithm that requires many parallel reruns of the same code. The code is short and finishes in less than a microsecond. This will be run millions of times which creates some problems when ...
- 495
0
votes
1
answer
61
views
Can I run the Pthreads library directly on a virtual machine
So, I have installed a virtual machine (kali linux), I would like to know if I can complete my assignment, which requires multiple processes to be created and managed using Pthreads library in C. She ...
1
vote
1
answer
49
views
problem using pthread_cond_signal and pthread_cond_timedwait
I have a small program with two threads sending signal to each other.
The program first works as expected but stop after various runs as the pthread_cond_timedwait run into a timeout.
For my test I ...
- 11
1
vote
0
answers
72
views
How to manage responses from multiple measuring devices to a single TCP/IP port for time sensitive applications?
I am very new to Socket programming, and I would appreciate any input you have in my question.
I am a physicist working on a project where the time intervals and coincidence of measurements play a big ...
- 45
2
votes
3
answers
75
views
Sending a SIGINT to specific thread with pthread_kill() results in whole process termination
I have a very big multithreaded C appication (for this and some other reasons I can not provide the entire code). Long story short, among others there are two threads: thread 1 sends SIGINT to thread ...
- 75
0
votes
1
answer
98
views
Shared data access in pthreads
My questions are : How many values can the output of the following code take? What are these values? What is the reason for different values? How can we prevent different values from occurring?
#...
- 111
0
votes
2
answers
91
views
Using a mutex to stop start/stop multiple threads running the same function
My goal is this:
I want to have multiple threads running the same function, the function is a while(1) loop so it just goes on. At some point main should use a mutex to force all threads to block ...
- 1
2
votes
1
answer
93
views
How to Keep a Thread Alive After Main Function Ends in C on Windows?
Question:
I'm working on a C project for Windows where I need to create a thread that runs independently of the main function. The goal is to ensure that this thread remains active even after the main ...
- 21
0
votes
1
answer
73
views
Issue with synchronization of threads using condition variables to output the Mandelbrot
I try to syncronize threads with condition variables to output mandelbrot but i get wrong mandelbort.
The functions output_mandel_line and compute_mandel_line are given and are correct. I made the
...
- 3
0
votes
1
answer
97
views
strange sporadic bugs in the most trivial C program involving pthreads
Below is the C source code for a trivial program.
The program has a main loop where the user is asked to choose between 3 options:
1- print some text
2- do some work (with no side effects)
3- exit the ...
- 2,517
2
votes
0
answers
65
views
Minilibx - multi-thread synchronization problem
I'm a student trying to use the minilibx library to render some graphics. I've split the rendering part and the calculation into two separate part, rendering part is a while loop constantly checking ...
- 31
0
votes
1
answer
52
views
Threads barrier. Thread T6.13 can only end while 6 threads (including itself) are running [closed]
• Process’ main thread, i.e. T6.0 must not terminate before the other 43 threads.
• At any time, at most 6 threads of process P6 could be running simultaneously, not counting the main thread.
My code ...
- 1