Pthreads (POSIX Threads) is a standardised C-based API for creating and manipulating threads on a POSIX-compliant system. It is defined by the standard "POSIX.1c, Threads extensions (IEEE Std 1003.1c-1995)", and subsequently by the Single Unix Specification.
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Synchronous events library
I have implemented a small library that handles synchronous events with POSIX compliant threads. I oriented me on the already existing POSIX thread API. Here are the files I created:
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2answers
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Producer-consumer in C using pthread_barrier
We're preparing for an exam at the moment, and our lecturer has given us a sample problem to work on. I have it completed, but would like to know a) If it is actually doing what it's supposed to, and ...
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Implementing pthread barrier for Mac OS/X
I have written this little thingie to fix a problem of missing pthread_barrier_t in Mac OS/X pthreads. Are there any issues with this code?
The header:
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1answer
150 views
Readers-Writers problem in C
I would love some suggestions on this code of mine, pointers on overall design, code quality, optimization in terms of memory and speed.
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3answers
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Dining philosophers problem with mutexes
I know this dining philosophers problem has been researched a lot and there are resources everywhere. But I wrote simple code to solve this problem with C and then turned to the Internet to see if ...
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2answers
198 views
Harmonic partial sum calculator with multithreading
I wrote a program which computes the harmonic partial sum to N terms with multithreading capability. I've been working on this to sharpen my C++ skills for the upcoming semester. Just wondering if ...
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3answers
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Counting letters as quickly as possible
I received a task, of taking a known text file (Linux dictionary), use threads to count the different letters in it, and present the results in an array.
The code doesn't have to be pretty, elegant, ...
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2answers
650 views
Thread design for sending data to multiple servers
In the following code, checkServerExists function checks if the server exists in the vector.
If it does, then the new message is directly pushed in the vector, ...
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1answer
150 views
1 Producer, N Consumers working in parallel, each doing ~1/nth of a task
I am not wondering about error checking (I will add that soon). I would instead like to know about correctness, efficiency and simplicity.
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1answer
147 views
Consumer producer implementation involving POSIX, semaphores, and locks
I am trying to get over my fear of multithreading programming and teaching myself to code using POSIX. I wrote a small version of the consumer producer problem. I am hoping I can get some feedback if ...
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72 views
Uses of barriers for one main thread controlling n threads
Referring to this post, my problem (summarized):
One main thread waits for connections, on accept() spawns a new thread for each connection. After we received ...
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1answer
1k views
Seperate rendering thread with XLib (GLX) and OpenGL
I am writing a prototype for something at work. Not very many people here know much about Linux/Unix or Xlib so I can't really ask here at work (most developers are expert Windows programmers). With ...
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4answers
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Concurrent queue with pthread implementation
I'm writing a multi-threaded queue implemented with pthreads. Since I came up with the code based on several tutorials from Internet, I would like to make sure there are no logic errors in my code:
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399 views
Vehicle-crossing simulation
It seems like this code should be shorter, but with all the error checking it is long and hard to follow. This is for a simulation of vehicles crossing a bridge, and this part is dealing with mutexes. ...
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1answer
3k views
Multithreading algorithm for high performance parallel computing and Producer-Consumer queue using POSIX threads
The following is the producer-consumer algorithm for a piece of software that I'm upgrading to take advantage of multi-core processing. The intended platform is some flavor of Linux running on an EC2 ...
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2answers
208 views
Example of a Multithreaded C program
In answering password cracker in c with multithreading, I ended up writing a sample in C, which is not my forte.
Is there anything that I missed which should have been included in a responsible ...
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1answer
337 views
Multithreaded GPS system
I am trying to reduce the total execution time of my code.
I have a GPS system which calculates routes between two points, and returns all points in between them.
I did a simple profile and the ...
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1answer
736 views
Scalability of C server implementation based on pthreads
I am wondering about the feasibility of the following basic implementation of a server and how well it would scale. I know that large-scale, distributed servers should probably be written in a ...
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3k views
Consumer-Producer Problem: POSIX Thread
I have implemented a producer consumer problem,
following the resources below:
Oracle doc
CSEE
I have used mutex_t and ...
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1answer
10k views
Thread-safe concurrent FIFO queue in C++
Is this the correct way to implement a thread-safe concurrent FIFO queue in C++? It requires passing unsigned char* arrays of binary data.
Thread Safe Concurrent ...
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351 views
std::lock implementation in C with pthreads
I messed a little bit with pthreads and needed an alternative to the C++11 function std::lock (2 args are enough), and this is what I came up with:
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1answer
112 views
Demonstration of pthread calls
Please review for any unnecessary casting, memory leaks, wrong use of pthread call, or validation problems in the given code.
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4answers
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Linux C++ Timer Class: How can I improve the accuracy?
I wrote this class today, but I am trying to figure out how to make it more accurate. I pass in seconds and multiply by 1000 to make it milliseconds, and the time does not line up. I need the ability ...
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1answer
2k views
Threading lambda functions
I've created this very small header that allows direct creation of threads from lambdas.
I can't find anything else similar on the net so I want to know whether there are any problems with this that I ...
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2answers
256 views
Review a newbie's pthread code
I'm a pthread newbie and I've been giving myself a challenge: I want to have a resource that multiple threads can access at the same time as read. However, if a ...
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2answers
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Usage of Conditions Variables with Pthreads [closed]
This is just a program to show the use of condition variable when two threads are involved. One thread wants a non zero value of count, and other thread is responsible for signaling it when the count ...
