Thread safety while looping with OpenMP

Question

I\'m working on a small Collatz conjecture calculator using C++ and GMP, and I\'m trying to implement parallelism on it using OpenMP, but I\'m coming across issues regarding thr

Answer 1

You could well be right about collisions with x. You can mark x as private by:

#pragma omp parallel private(x)

This way each thread gets their own "version" of the variable x, which should make this thread-safe. By default, variables declared before a #pragma omp parallel are public, so there is one shared instance between all of the threads.