Controlling the number of parallel threads in the programming language D

Question

I learn the D language because I'm interested in its parallelism support. Here is a parallel code snippet from my project:

import std.parallelism; foreach (node v; taskPool.parallel(std.range.iota(z))) { // call here handle(v); } 

How to control the number of threads that work in parallel? Is there an equivalent to the OpenMP omp_set_num_threads function?

Answer 1

You can set defaultPoolThreads before using taskPool for the first time to set the number of threads, but this will not allow you to change it on the fly.

http://dlang.org/phobos/std_parallelism.html#.defaultPoolThreads

In addition, you can explicitly create new TaskPools instead of using the default. Depending on what you are trying to do, this may also be an option.

http://dlang.org/phobos/std_parallelism.html#.TaskPool.this