openmp - cython: private variables in prange

Question

I am trying to re-write in cython a fortran subroutine that uses openmp. I have found no difficulty in re-writing the fortran subroutine itself in cython. The non openmp version works fine. However, I am not sure what to do about the openmp directive....

!$omp parallel do private(x, y, z)

In cython, I understand that you get the openmp parallel do using cython.parallel.prange. However, I don't see how to declare private variables for the loop.

Is this even possible?

thanks for any insight you can provide.

Answer 1

对的，这是可能的。文档说：

如果您在 prange 块中分配给变量，则它变为 lastprivate，这意味着该变量将包含上次迭代的值。.....分配给与块并行的变量将是私有的并且在块之后不可用，因为没有顺序最后一个值的概念。