Module multithreading

Multithreading helpers.

The main purpose of this module is to allow the number of worker threads used by each puzzle solution to be controlled by a CLI argument.

Functions

• get_thread_count
  Get the number of worker threads to use.
• set_thread_count
  Set the number of worker threads to use.
• worker_pool
  Run a worker function concurrently using a pool of worker threads.