From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Thu, 20 Apr 2023 20:13:23 +0000 (-0600)
Subject: Merge pull request #15086 from luca-heltai/stefanozampini/get_mpi_comm_nonref
X-Git-Tag: v9.5.0-rc1~306
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c3d5e99640cbbadaa64390231b3d054528366e36;p=dealii.git

Merge pull request #15086 from luca-heltai/stefanozampini/get_mpi_comm_nonref

All get_mpi_communicator methods now return MPI_Comm by value
---

c3d5e99640cbbadaa64390231b3d054528366e36
diff --cc include/deal.II/lac/petsc_block_vector.h
index 1036745888,3935a0f2c7..9bec0c860d
--- a/include/deal.II/lac/petsc_block_vector.h
+++ b/include/deal.II/lac/petsc_block_vector.h
@@@ -570,19 -515,12 +569,14 @@@ namespace PETScWrapper
  
  
  
-     inline const MPI_Comm &
+     inline MPI_Comm
      BlockVector::get_mpi_communicator() const
      {
-       static MPI_Comm comm = PETSC_COMM_SELF;
-       MPI_Comm        pcomm =
-         PetscObjectComm(reinterpret_cast<PetscObject>(petsc_nest_vector));
-       if (pcomm != MPI_COMM_NULL)
-         comm = pcomm;
-       return comm;
+       return PetscObjectComm(reinterpret_cast<PetscObject>(petsc_nest_vector));
      }
  
 +
 +
      inline bool
      BlockVector::has_ghost_elements() const
      {