[Octave-bug-tracker] [bug #45831] parallel package: parcellfun cannot handle objects as return value

[Olaf Till]

Follow-up Comment #3, bug #45831 (project octave):

For transfering values between processes, `parcellfun' uses the save/load
funtionality implemented in Octave separately for each type of value.

The classdef object type is still rather new, and save/load does not seem to
be implemented for it as yet (Octave-4.0.0):


octave:1> a = cin(2)
a =

<object cin>

octave:2> save ("-binary", "test.dat", "a")
error: octave_base_value::save_binary(): wrong type argument 'object'
...


Trying to rewrite parcellfun to use threads, not processes, would be a major
effort, and without a strong reason probably nobody will attempt it. So as
long as the above `save ...' does not work, `parcellfun' has no chance to work
with classdef objects.

So that's rather a bug in Octave than in the `parallel' package. But I'd guess
JWE already knows about this issue.

Olaf


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