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I have a quick question. I am supposed to create a small multithreaded program to grab data from multiple sensors and I have knowledge of both pthreads and qthreads. I have access to both libraries. personally I am biased towards using Qt because of its design and various functionalities. But is there a significant advantage on using one vs the other? Thanks
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pthread is outdated since availability of C11 which introduced standard threading in C. The header files is <threads. h> with functions like thrd_create . The standard functions for threading, conditions, and signalling, provide guarantees that pthreads cannot.
POSIX Threads, commonly known as pthreads, is an execution model that exists independently from a language, as well as a parallel execution model. It allows a program to control multiple different flows of work that overlap in time.
On the other hand, OpenMP is much higher level, is more portable and doesn't limit you to using C. It's also much more easily scaled than pthreads. One specific example of this is OpenMP's work-sharing constructs, which let you divide work across multiple threads with relative ease.
Scheduling. You use the Pthreads scheduling features to set up a policy that determines which thread the system first selects to run when CPU cycles become available, and how long each thread can run once it is given the CPU.
QThreads are built upon pthreads. They provide an Object Oriented abstraction, making it easier to work with threads. Besides QThreads are portable, they can run on whatever system using the underlying thread system, while pthreads are specific of POSIX systems.
The almost-only disadvantage of using QThreads is that you'll need to link your application against Qt; this dependence could make it a little more difficult to distribute your application.
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