Programmatically check type of parpool

How can I check programmatically whether an existing parallel pool is thread-based or process-based?

[Raymond Norris]

@Matthias Wurm I'm currious why this would matter?

[Matthias Wurm]

Some of my functions use the thread-based pool, others the process-based pool. When running a function and the wrong pool already exists, I would like to end it and create the correct one.

Answer 1

[Meg Noah]

delete(gcp('nocreate'))
pool = parpool('Threads')

Starting parallel pool (parpool) using the 'Threads' profile ...
Connected to parallel pool with 8 workers.

pool = 
 ThreadPool with properties: 

           NumWorkers: 8
                 Busy: false
            FileStore: [1x1 parallel.FileStore]
           ValueStore: [1x1 parallel.ValueStore]

class(pool)

ans = 'parallel.ThreadPool'

% test of whether or not pool is a thread parallel pool
contains(class(pool), 'parallel.ThreadPool')

ans = logical
   1

opts = parforOptions(pool)

opts = 
  PoolOptions with properties:

    RangePartitionMethod: 'auto'

                    Pool: [1×1 parallel.ThreadPool]
           MaxNumWorkers: 8

class(opts.Pool)

ans = 'parallel.ThreadPool'

% test for whether or not pool is a Thread pool
contains(class(opts.Pool), 'parallel.ThreadPool')

ans = logical
   1

% check to see if the same methods in pool are inherited from ThreadPool
methods(pool)

Methods for class parallel.ThreadPool:

addAttachedFiles       parfeval               partition              tocBytes               
listAutoAttachedFiles  parfevalOnAll          ticBytes               updateAttachedFiles    

Call "methods('handle')" for methods of parallel.ThreadPool inherited from handle.

[Matthias Wurm]

Thank you! I was not aware of the "class()" function.