Line data    Source code

       1             : //* This file is part of the MOOSE framework
       2             : //* https://mooseframework.inl.gov
       3             : //*
       4             : //* All rights reserved, see COPYRIGHT for full restrictions
       5             : //* https://github.com/idaholab/moose/blob/master/COPYRIGHT
       6             : //*
       7             : //* Licensed under LGPL 2.1, please see LICENSE for details
       8             : //* https://www.gnu.org/licenses/lgpl-2.1.html
       9             : 
      10             : #ifdef MOOSE_MFEM_ENABLED
      11             : 
      12             : #include "ProblemOperatorBase.h"
      13             : 
      14             : class MFEMProblem;
      15             : 
      16             : namespace Moose::MFEM
      17             : {
      18             : 
      19         311 : ProblemOperatorBase::ProblemOperatorBase(MFEMProblem & problem)
      20         311 :   : _problem(problem), _problem_data(problem.getProblemData())
      21             : {
      22         311 : }
      23             : 
      24             : void
      25         311 : ProblemOperatorBase::SetGridFunctions()
      26             : {
      27         311 :   _test_variables = _problem_data.gridfunctions.Get(_test_var_names);
      28         311 :   _trial_variables = _problem_data.gridfunctions.Get(_trial_var_names);
      29             : 
      30             :   // Set operator size and block structure
      31         311 :   _block_true_offsets.SetSize(_trial_variables.size() + 1);
      32         311 :   _block_true_offsets[0] = 0;
      33         582 :   for (unsigned int ind = 0; ind < _trial_variables.size(); ++ind)
      34             :   {
      35         271 :     _block_true_offsets[ind + 1] = _trial_variables.at(ind)->ParFESpace()->TrueVSize();
      36             :   }
      37         311 :   _block_true_offsets.PartialSum();
      38             : 
      39         311 :   _true_x.Update(_block_true_offsets);
      40         311 :   _true_rhs.Update(_block_true_offsets);
      41         311 : }
      42             : 
      43             : void
      44         311 : ProblemOperatorBase::Init(mfem::BlockVector & X)
      45             : {
      46         311 :   X.Update(_block_true_offsets);
      47         582 :   for (const auto i : index_range(_test_variables))
      48         271 :     X.GetBlock(i) = _test_variables[i]->GetTrueVector();
      49             :   // Sync the flags from sub-block vectors to global vector
      50         311 :   X.SyncFromBlocks();
      51             : 
      52             :   // After initial assignment of X from the grid function, which may contain initial conditions,
      53             :   // we alias the grid function to X
      54         582 :   for (const auto i : index_range(_test_variables))
      55         271 :     _test_variables[i]->MakeTRef(_test_variables[i]->ParFESpace(), X, _block_true_offsets[i]);
      56         311 :   _test_true_vector = &X;
      57             : 
      58             :   // This might seem silly but after making the tref the memory flags of the grid function and its
      59             :   // true vector are in an empty state other than the aliasing. This operation syncs the flags and
      60             :   // should be a no-op in terms of actual data transfer
      61         311 :   SetTestVariablesFromTrueVectors();
      62         311 : }
      63             : 
      64             : void
      65        1537 : ProblemOperatorBase::SetTestVariablesFromTrueVectors()
      66             : {
      67        3034 :   for (unsigned int ind = 0; ind < _test_variables.size(); ++ind)
      68             :   {
      69        1497 :     auto * const test_var = _test_variables.at(ind);
      70             : 
      71             :     // We must sync the memory flags from the true true vector to the grid function copy of the true
      72             :     // vector
      73             :     mooseAssert(_test_true_vector, "The true vector should already have been set");
      74        1497 :     test_var->GetTrueVector().SyncMemory(*_test_true_vector);
      75        1497 :     test_var->SetFromTrueVector();
      76             :   }
      77        1537 : }
      78             : 
      79             : void
      80         613 : ProblemOperatorBase::SetTrialVariablesFromTrueVectors()
      81             : {
      82        1226 :   for (unsigned int ind = 0; ind < _trial_variables.size(); ++ind)
      83             :   {
      84         613 :     _trial_variables.at(ind)->SetFromTrueVector();
      85             :   }
      86         613 : }
      87             : }
      88             : 
      89             : #endif