On 3/5/24 07:46, Paras Kumar wrote:
Within the context of an MPI parallel code, I need to broadcast the
ConstitutiveParameters struct which contains std::unique pointer to the base
class StrainEnergyFuncParameters; cf. MWE file.
Using the ideas discussed in the post
https://groups.google.com/g/dealii/c/bmqTbs4ofHQ/m/aCuDpUekBAAJ, the code
works fine if the members are concrete derived classes since there the
serialize function is enough. However, I get segmentation fault during the
unpack() call since the deserialize() function is not called.
Running the attached MWE would explain the issue.
Could someone please help in understanding how I could solve this issue?
Yes, this can't work :-) In essence, you are packing up a pointer (=an address
into memory space) on machine A, and unpack it on machine B. But on machine B,
nothing useful is likely going to be stored at the location of the memory
address at which there was a useful object on machine A, and so when you
access the data stored at that location, you should not expect anything good
to happen.
You need to find a way to serialize/deserialize the data pointed to, not the
pointer itself.
Best
W.
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Wolfgang Bangerth email: bange...@colostate.edu
www: http://www.math.colostate.edu/~bangerth/
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