Re: How to call stop from parallel foreach

[Ali Çehreli via Digitalmars-d-learn]

On 6/24/21 1:41 PM, seany wrote:

> Is there any way to control the number of CPU cores used in
> parallelization ?

Yes. You have to create a task pool explicitly:

import std.parallelism;

void main() {
  enum threadCount = 2;
  auto myTaskPool = new TaskPool(threadCount);
  scope (exit) {
    myTaskPool.finish();
  }

  enum workUnitSize = 1; // Or 42 or something else. :)
  foreach (e; myTaskPool.parallel([ 1, 2, 3 ], workUnitSize)) {
    // ...
  }
}

I've touched on a few parallelism concepts at this point in a presentation:

  https://www.youtube.com/watch?v=dRORNQIB2wA&t=1332s

Ali