Improve streaming matrix and internal memory management

• Adjust procLduMatrix etc to allow default construct and reading from stream, which enables simpler transfer of data between ranks.
• Internal memory management with unique_ptr (modernize and simplifies code).

changed milestone to %v2406

added enhancement label

requested review from @kuti

assigned to @kuti

Includes changes for !669 (merged) as well, so can just test this branch (as desired).

added 4 commits

• ce57cfa1...05194796 - 2 commits from branch develop
• 2b79fc36 - ENH: handle matrix demand-driven internals with unique_ptr
• e819ec12 - ENH: improve procLduMatrix streaming and assembly of LUscalarMatrix

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marked this merge request as ready

For some reason, I got the following compilation error after cherry-picking two commits on top of the develop - and executing the compilation with ./Allwmake -j -l -q:

OpenFOAM/work/update-matrix-streaming/src/OpenFOAM/lnInclude/GAMGAgglomeration.H:266:9: error: no matching constructor for initialization of 'Foam::assemblyFaceAreaPairGAMGAgglomeration'

Environment:

    base1    = update-matrix-streaming
    api      = 2312
    patch    = 240220
    compiler = Clang (system) = clang version 15.0.7
    mpi      = SYSTEMOPENMPI = mpirun (Open MPI) 1.10.7.0.5e373bf1fd
    OS       = Description:     openSUSE Leap 15.5
    opts     = linux64ClangDPInt32Opt

Would you mind checking it? I'll redo a clean compilation now. Fails with the clean compilation as well.

added 2 commits

• 43c0c398 - ENH: handle matrix demand-driven internals with unique_ptr
• 27aa7e4e - ENH: improve procLduMatrix streaming and assembly of LUscalarMatrix

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resolved all threads

approved this merge request

mentioned in commit d89ecc74

merged