diff --git a/MathLib/LinAlg/BLAS.cpp b/MathLib/LinAlg/BLAS.cpp
index 51f2add2370cb4fd1169c593476234958b4013f8..c72cb1684840ee6444aec83bb7dc260883ab583a 100644
--- a/MathLib/LinAlg/BLAS.cpp
+++ b/MathLib/LinAlg/BLAS.cpp
@@ -75,28 +75,28 @@ void copy(PETScVector const& x, PETScVector& y)
void scale(PETScVector& x, double const a)
{
- VecScale(*x.getRawVector(), a);
+ VecScale(x.getRawVector(), a);
}
// y = a*y + X
void aypx(PETScVector& y, double const a, PETScVector const& x)
{
// TODO check sizes
- VecAYPX(*y.getRawVector(), a, *x.getRawVector());
+ VecAYPX(y.getRawVector(), a, x.getRawVector());
}
// y = a*x + y
void axpy(PETScVector& y, double const a, PETScVector const& x)
{
// TODO check sizes
- VecAXPY(*y.getRawVector(), a, *x.getRawVector());
+ VecAXPY(y.getRawVector(), a, x.getRawVector());
}
// y = a*x + b*y
void axpby(PETScVector& y, double const a, double const b, PETScVector const& x)
{
// TODO check sizes
- VecAXPBY(*y.getRawVector(), a, b, *x.getRawVector());
+ VecAXPBY(y.getRawVector(), a, b, x.getRawVector());
}
// Explicit specialization
@@ -105,7 +105,7 @@ template<>
void componentwiseDivide(PETScVector& w,
PETScVector const& x, PETScVector const& y)
{
- VecPointwiseDivide(*w.getRawVector(), *x.getRawVector(), *y.getRawVector());
+ VecPointwiseDivide(w.getRawVector(), x.getRawVector(), y.getRawVector());
}
// Explicit specialization
@@ -173,7 +173,7 @@ void matMult(PETScMatrix const& A, PETScVector const& x, PETScVector& y)
// TODO check sizes
assert(&x != &y);
if (!y.getRawVector()) y.shallowCopy(x);
- MatMult(A.getRawMatrix(), *x.getRawVector(), *y.getRawVector());
+ MatMult(A.getRawMatrix(), x.getRawVector(), y.getRawVector());
}
// v3 = A*v1 + v2
@@ -183,7 +183,7 @@ void matMultAdd(PETScMatrix const& A, PETScVector const& v1,
// TODO check sizes
assert(&v1 != &v3);
if (!v3.getRawVector()) v3.shallowCopy(v1);
- MatMultAdd(A.getRawMatrix(), *v1.getRawVector(), *v2.getRawVector(), *v3.getRawVector());
+ MatMultAdd(A.getRawMatrix(), v1.getRawVector(), v2.getRawVector(), v3.getRawVector());
}
void finalizeAssembly(PETScMatrix& A)
@@ -225,21 +225,21 @@ void scale(EigenVector& x, double const a)
void aypx(EigenVector& y, double const a, EigenVector const& x)
{
// TODO: does that break anything?
- y.getRawVector() = a*y.getRawVector() + x.getRawVector();
+ y.getRawVector() = a * y.getRawVector() + x.getRawVector();
}
// y = a*x + y
void axpy(EigenVector& y, double const a, EigenVector const& x)
{
// TODO: does that break anything?
- y.getRawVector() += a*x.getRawVector();
+ y.getRawVector() += a * x.getRawVector();
}
// y = a*x + y
void axpby(EigenVector& y, double const a, double const b, EigenVector const& x)
{
// TODO: does that break anything?
- y.getRawVector() = a*x.getRawVector() + b*y.getRawVector();
+ y.getRawVector() = a * x.getRawVector() + b * y.getRawVector();
}
// Explicit specialization
diff --git a/MathLib/LinAlg/PETSc/PETScMatrix.cpp b/MathLib/LinAlg/PETSc/PETScMatrix.cpp
index a0c56f6b21bc14049aaabd7fcb22847106bb6286..2695a1b755a75aca736e6fae3449d82e5deaa351 100644
--- a/MathLib/LinAlg/PETSc/PETScMatrix.cpp
+++ b/MathLib/LinAlg/PETSc/PETScMatrix.cpp
@@ -49,16 +49,14 @@ PETScMatrix::PETScMatrix (const PetscInt nrows, const PetscInt ncols, const PETS
}
PETScMatrix::PETScMatrix(const PETScMatrix &A)
- : _A(new PETSc_Mat)
- , _nrows(A._nrows)
+ : _nrows(A._nrows)
, _ncols(A._ncols)
, _n_loc_rows(A._n_loc_rows)
, _n_loc_cols(A._n_loc_cols)
, _start_rank(A._start_rank)
, _end_rank(A._end_rank)
{
- _A.reset(new PETSc_Mat);
- MatConvert(*A._A, MATSAME, MAT_INITIAL_MATRIX, _A.get());
+ MatConvert(A._A, MATSAME, MAT_INITIAL_MATRIX, &_A);
}
PETScMatrix&
@@ -73,11 +71,10 @@ PETScMatrix::operator=(PETScMatrix const& A)
if (_A) {
// TODO this is the slowest option for copying
- MatCopy(*A._A, *_A, DIFFERENT_NONZERO_PATTERN);
+ MatCopy(A._A, _A, DIFFERENT_NONZERO_PATTERN);
} else {
destroy();
- _A.reset(new PETSc_Mat);
- MatConvert(*A._A, MATSAME, MAT_INITIAL_MATRIX, _A.get());
+ MatConvert(A._A, MATSAME, MAT_INITIAL_MATRIX, &_A);
}
return *this;
@@ -93,11 +90,11 @@ void PETScMatrix::setRowsColumnsZero(std::vector<PetscInt> const& row_pos)
// This avoids all reductions in the zero row routines
// and thus improves performance for very large process counts.
// See PETSc doc about MAT_NO_OFF_PROC_ZERO_ROWS.
- MatSetOption(*_A, MAT_NO_OFF_PROC_ZERO_ROWS, PETSC_TRUE);
+ MatSetOption(_A, MAT_NO_OFF_PROC_ZERO_ROWS, PETSC_TRUE);
if(nrows>0)
- MatZeroRows(*_A, nrows, &row_pos[0], one, PETSC_NULL, PETSC_NULL);
+ MatZeroRows(_A, nrows, &row_pos[0], one, PETSC_NULL, PETSC_NULL);
else
- MatZeroRows(*_A, 0, PETSC_NULL, one, PETSC_NULL, PETSC_NULL);
+ MatZeroRows(_A, 0, PETSC_NULL, one, PETSC_NULL, PETSC_NULL);
}
void PETScMatrix::viewer(const std::string &file_name, const PetscViewerFormat vw_format)
@@ -108,8 +105,8 @@ void PETScMatrix::viewer(const std::string &file_name, const PetscViewerFormat v
finalizeAssembly();
- PetscObjectSetName((PetscObject)*_A,"Stiffness_matrix");
- MatView(*_A,viewer);
+ PetscObjectSetName((PetscObject)_A,"Stiffness_matrix");
+ MatView(_A,viewer);
// This preprocessor is only for debugging, e.g. dump the matrix and exit the program.
//#define EXIT_TEST
@@ -123,22 +120,20 @@ void PETScMatrix::viewer(const std::string &file_name, const PetscViewerFormat v
void PETScMatrix::create(const PetscInt d_nz, const PetscInt o_nz)
{
- _A.reset(new PETSc_Mat);
+ MatCreate(PETSC_COMM_WORLD, &_A);
+ MatSetSizes(_A, _n_loc_rows, _n_loc_cols, _nrows, _ncols);
- MatCreate(PETSC_COMM_WORLD, _A.get());
- MatSetSizes(*_A, _n_loc_rows, _n_loc_cols, _nrows, _ncols);
+ MatSetFromOptions(_A);
- MatSetFromOptions(*_A);
-
- MatSetType(*_A, MATMPIAIJ);
- MatSeqAIJSetPreallocation(*_A, d_nz, PETSC_NULL);
- MatMPIAIJSetPreallocation(*_A, d_nz, PETSC_NULL, o_nz, PETSC_NULL);
- // If pre-allocation does not work one can use MatSetUp(*_A), which is much
+ MatSetType(_A, MATMPIAIJ);
+ MatSeqAIJSetPreallocation(_A, d_nz, PETSC_NULL);
+ MatMPIAIJSetPreallocation(_A, d_nz, PETSC_NULL, o_nz, PETSC_NULL);
+ // If pre-allocation does not work one can use MatSetUp(_A), which is much
// slower.
- MatGetOwnershipRange(*_A, &_start_rank, &_end_rank);
- MatGetSize(*_A, &_nrows, &_ncols);
- MatGetLocalSize(*_A, &_n_loc_rows, &_n_loc_cols);
+ MatGetOwnershipRange(_A, &_start_rank, &_end_rank);
+ MatGetSize(_A, &_nrows, &_ncols);
+ MatGetLocalSize(_A, &_n_loc_rows, &_n_loc_cols);
}
bool finalizeMatrixAssembly(PETScMatrix &mat, const MatAssemblyType asm_type)
diff --git a/MathLib/LinAlg/PETSc/PETScMatrix.h b/MathLib/LinAlg/PETSc/PETScMatrix.h
index d063d58503758c19231e84da34e6b91c2ea358ee..1b696bf9e0088cc14a2cbece1385c2745950239d 100644
--- a/MathLib/LinAlg/PETSc/PETScMatrix.h
+++ b/MathLib/LinAlg/PETSc/PETScMatrix.h
@@ -15,7 +15,6 @@
#ifndef PETSCMATRIX_H_
#define PETSCMATRIX_H_
-#include <memory>
#include <string>
#include <vector>
@@ -72,8 +71,8 @@ class PETScMatrix
*/
void finalizeAssembly(const MatAssemblyType asm_type = MAT_FINAL_ASSEMBLY)
{
- MatAssemblyBegin(*_A, asm_type);
- MatAssemblyEnd(*_A, asm_type);
+ MatAssemblyBegin(_A, asm_type);
+ MatAssemblyEnd(_A, asm_type);
}
/// Get the number of rows.
@@ -116,7 +115,7 @@ class PETScMatrix
/// Get matrix reference.
PETSc_Mat &getRawMatrix()
{
- return *_A;
+ return _A;
}
/*! Get a matrix reference.
@@ -127,13 +126,13 @@ class PETScMatrix
*/
PETSc_Mat const& getRawMatrix() const
{
- return *_A;
+ return _A;
}
/// Set all entries to zero.
void setZero()
{
- MatZeroEntries(*_A);
+ MatZeroEntries(_A);
}
/*
@@ -155,7 +154,7 @@ class PETScMatrix
*/
void multiply(const PETScVector &vec, PETScVector &vec_r)
{
- MatMult(*_A, vec.getData(), vec_r.getData() );
+ MatMult(_A, vec.getData(), vec_r.getData() );
}
/*!
@@ -166,7 +165,7 @@ class PETScMatrix
*/
void set(const PetscInt i, const PetscInt j, const PetscScalar value)
{
- MatSetValue(*_A, i, j, value, INSERT_VALUES);
+ MatSetValue(_A, i, j, value, INSERT_VALUES);
}
/*!
@@ -177,7 +176,7 @@ class PETScMatrix
*/
void add(const PetscInt i, const PetscInt j, const PetscScalar value)
{
- MatSetValue(*_A, i, j, value, ADD_VALUES);
+ MatSetValue(_A, i, j, value, ADD_VALUES);
}
/// Add sub-matrix at positions given by \c indices.
@@ -237,10 +236,10 @@ class PETScMatrix
const PetscViewerFormat vw_format = PETSC_VIEWER_ASCII_MATLAB );
private:
- void destroy() { if (_A) MatDestroy(_A.get()); _A.reset(nullptr); }
+ void destroy() { if (_A) MatDestroy(&_A); _A = nullptr; }
/// PETSc matrix
- std::unique_ptr<PETSc_Mat> _A;
+ PETSc_Mat _A = nullptr;
/// Number of the global rows
PetscInt _nrows;
@@ -286,7 +285,7 @@ void PETScMatrix::add(std::vector<PetscInt> const& row_pos,
const PetscInt nrows = static_cast<PetscInt> (row_pos.size());
const PetscInt ncols = static_cast<PetscInt> (col_pos.size());
- MatSetValues(*_A, nrows, &row_pos[0], ncols, &col_pos[0], &sub_mat(0,0), ADD_VALUES);
+ MatSetValues(_A, nrows, &row_pos[0], ncols, &col_pos[0], &sub_mat(0,0), ADD_VALUES);
};
/*!
diff --git a/MathLib/LinAlg/PETSc/PETScVector.cpp b/MathLib/LinAlg/PETSc/PETScVector.cpp
index 0ee62a9c8b9a9c81eceb35558a238645256e0078..b56c4031a0a2d6283683d42e849e0244b9baa6bc 100644
--- a/MathLib/LinAlg/PETSc/PETScVector.cpp
+++ b/MathLib/LinAlg/PETSc/PETScVector.cpp
@@ -28,15 +28,13 @@ namespace MathLib
{
PETScVector::PETScVector(const PetscInt vec_size, const bool is_global_size)
{
- _v.reset(new PETSc_Vec);
-
if( is_global_size ) {
- VecCreate(PETSC_COMM_WORLD, _v.get());
- VecSetSizes(*_v, PETSC_DECIDE, vec_size);
+ VecCreate(PETSC_COMM_WORLD, &_v);
+ VecSetSizes(_v, PETSC_DECIDE, vec_size);
} else {
// Fix size partitioning
// the size can be associated to specific memory allocation of a matrix
- VecCreateMPI(PETSC_COMM_WORLD, vec_size, PETSC_DECIDE, _v.get());
+ VecCreateMPI(PETSC_COMM_WORLD, vec_size, PETSC_DECIDE, &_v);
}
config();
@@ -48,20 +46,18 @@ PETScVector::PETScVector(const PetscInt vec_size,
: _size_ghosts{static_cast<PetscInt>(ghost_ids.size())}
, _has_ghost_id{true}
{
- _v.reset(new PETSc_Vec);
-
PetscInt nghosts = static_cast<PetscInt>( ghost_ids.size() );
if ( is_global_size )
{
VecCreateGhost(PETSC_COMM_WORLD, PETSC_DECIDE, vec_size, nghosts,
- ghost_ids.data(), _v.get());
+ ghost_ids.data(), &_v);
}
else
{
- VecCreate(PETSC_COMM_WORLD, _v.get());
- VecSetType(*_v, VECMPI);
- VecSetSizes(*_v, vec_size, PETSC_DECIDE);
- VecMPISetGhost(*_v, nghosts, ghost_ids.data());
+ VecCreate(PETSC_COMM_WORLD, &_v);
+ VecSetType(_v, VECMPI);
+ VecSetSizes(_v, vec_size, PETSC_DECIDE);
+ VecMPISetGhost(_v, nghosts, ghost_ids.data());
}
config();
@@ -74,7 +70,7 @@ PETScVector::PETScVector(const PETScVector &existing_vec, const bool deep_copy)
// Copy values
if(deep_copy)
{
- VecCopy(*existing_vec._v, *_v);
+ VecCopy(existing_vec._v, _v);
}
}
@@ -91,20 +87,20 @@ PETScVector::PETScVector(PETScVector &&other)
void PETScVector::config()
{
- VecSetFromOptions(*_v);
- // VecSetUp(*_v); // for petsc ver.>3.3
- VecGetOwnershipRange(*_v, &_start_rank, &_end_rank);
+ VecSetFromOptions(_v);
+ // VecSetUp(_v); // for petsc ver.>3.3
+ VecGetOwnershipRange(_v, &_start_rank, &_end_rank);
- VecGetLocalSize(*_v, &_size_loc);
- VecGetSize(*_v, &_size);
+ VecGetLocalSize(_v, &_size_loc);
+ VecGetSize(_v, &_size);
- VecSetOption(*_v, VEC_IGNORE_NEGATIVE_INDICES, PETSC_TRUE);
+ VecSetOption(_v, VEC_IGNORE_NEGATIVE_INDICES, PETSC_TRUE);
}
void PETScVector::finalizeAssembly()
{
- VecAssemblyBegin(*_v);
- VecAssemblyEnd(*_v);
+ VecAssemblyBegin(_v);
+ VecAssemblyEnd(_v);
}
void PETScVector::gatherLocalVectors( PetscScalar local_array[],
@@ -143,7 +139,7 @@ void PETScVector::getGlobalVector(PetscScalar u[])
#endif
PetscScalar *xp = nullptr;
- VecGetArray(*_v, &xp);
+ VecGetArray(_v, &xp);
gatherLocalVectors(xp, u);
@@ -151,7 +147,7 @@ void PETScVector::getGlobalVector(PetscScalar u[])
// for a communication load balance:
//MPI_Barrier(PETSC_COMM_WORLD);
- VecRestoreArray(*_v, &xp);
+ VecRestoreArray(_v, &xp);
//TEST
#ifdef TEST_MEM_PETSC
@@ -174,13 +170,13 @@ PetscScalar* PETScVector::getLocalVector() const
PetscScalar *loc_array;
if (_has_ghost_id)
{
- VecGhostUpdateBegin(*_v, INSERT_VALUES, SCATTER_FORWARD);
- VecGhostUpdateEnd(*_v, INSERT_VALUES, SCATTER_FORWARD);
- VecGhostGetLocalForm(*_v, &_v_loc);
+ VecGhostUpdateBegin(_v, INSERT_VALUES, SCATTER_FORWARD);
+ VecGhostUpdateEnd(_v, INSERT_VALUES, SCATTER_FORWARD);
+ VecGhostGetLocalForm(_v, &_v_loc);
VecGetArray(_v_loc, &loc_array);
}
else
- VecGetArray(*_v, &loc_array);
+ VecGetArray(_v, &loc_array);
return loc_array;
}
@@ -189,10 +185,10 @@ void PETScVector::restoreArray(PetscScalar* array) const
if (_has_ghost_id)
{
VecRestoreArray(_v_loc, &array);
- VecGhostRestoreLocalForm(*_v, &_v_loc);
+ VecGhostRestoreLocalForm(_v, &_v_loc);
}
else
- VecRestoreArray(*_v, &array);
+ VecRestoreArray(_v, &array);
}
PetscScalar PETScVector::getNorm(MathLib::VecNormType nmtype) const
@@ -214,7 +210,7 @@ PetscScalar PETScVector::getNorm(MathLib::VecNormType nmtype) const
}
PetscScalar norm = 0.;
- VecNorm(*_v, petsc_norm, &norm);
+ VecNorm(_v, petsc_norm, &norm);
return norm;
}
@@ -224,8 +220,8 @@ void PETScVector::viewer(const std::string &file_name, const PetscViewerFormat v
PetscViewerASCIIOpen(PETSC_COMM_WORLD, file_name.c_str(), &viewer);
PetscViewerPushFormat(viewer, vw_format);
- PetscObjectSetName((PetscObject)*_v, file_name.c_str());
- VecView(*_v, viewer);
+ PetscObjectSetName((PetscObject)_v, file_name.c_str());
+ VecView(_v, viewer);
#define nEXIT_TEST
#ifdef EXIT_TEST
@@ -240,9 +236,7 @@ void PETScVector::shallowCopy(const PETScVector &v)
{
destroy();
- _v.reset(new PETSc_Vec);
-
- VecDuplicate(*v._v, _v.get());
+ VecDuplicate(v.getRawVector(), &_v);
_start_rank = v._start_rank;
_end_rank = v._end_rank;
@@ -251,7 +245,7 @@ void PETScVector::shallowCopy(const PETScVector &v)
_size_ghosts = v._size_ghosts;
_has_ghost_id = v._has_ghost_id;
- VecSetOption(*_v, VEC_IGNORE_NEGATIVE_INDICES, PETSC_TRUE);
+ VecSetOption(_v, VEC_IGNORE_NEGATIVE_INDICES, PETSC_TRUE);
}
void finalizeVectorAssembly(PETScVector &vec)
diff --git a/MathLib/LinAlg/PETSc/PETScVector.h b/MathLib/LinAlg/PETSc/PETScVector.h
index ce15cbe8f4614dd990a96d24e8191f1644bfe091..f2abd9aa187fb70898c55a410c8f5ca1da7e52e5 100644
--- a/MathLib/LinAlg/PETSc/PETScVector.h
+++ b/MathLib/LinAlg/PETSc/PETScVector.h
@@ -17,7 +17,6 @@
#ifndef PETSCVECTOR_H_
#define PETSCVECTOR_H_
-#include <memory>
#include <string>
#include <vector>
@@ -128,7 +127,7 @@ class PETScVector
*/
void set(const PetscInt i, const PetscScalar value)
{
- VecSetValue(*_v, i, value, INSERT_VALUES);
+ VecSetValue(_v, i, value, INSERT_VALUES);
}
/*!
@@ -138,7 +137,7 @@ class PETScVector
*/
void add(const PetscInt i, const PetscScalar value)
{
- VecSetValue(*_v, i, value, ADD_VALUES);
+ VecSetValue(_v, i, value, ADD_VALUES);
}
/*!
@@ -150,7 +149,7 @@ class PETScVector
template<class T_SUBVEC> void add(const std::vector<PetscInt> &e_idxs,
const T_SUBVEC &sub_vec)
{
- VecSetValues(*_v, e_idxs.size(), &e_idxs[0], &sub_vec[0], ADD_VALUES);
+ VecSetValues(_v, e_idxs.size(), &e_idxs[0], &sub_vec[0], ADD_VALUES);
}
/*!
@@ -162,7 +161,7 @@ class PETScVector
template<class T_SUBVEC> void set(const std::vector<PetscInt> &e_idxs,
const T_SUBVEC &sub_vec)
{
- VecSetValues(*_v, e_idxs.size(), &e_idxs[0], &sub_vec[0], INSERT_VALUES);
+ VecSetValues(_v, e_idxs.size(), &e_idxs[0], &sub_vec[0], INSERT_VALUES);
}
/*!
@@ -174,14 +173,14 @@ class PETScVector
template<class T_SUBVEC> void get(const std::vector<PetscInt> &e_idxs,
T_SUBVEC &sub_vec)
{
- VecGetValues(*_v, e_idxs.size(), &e_idxs[0], &sub_vec[0]);
+ VecGetValues(_v, e_idxs.size(), &e_idxs[0], &sub_vec[0]);
}
// TODO preliminary
double operator[] (PetscInt idx) const
{
double value;
- VecGetValues(*_v, 1, &idx, &value);
+ VecGetValues(_v, 1, &idx, &value);
return value;
}
@@ -202,7 +201,7 @@ class PETScVector
PetscScalar get(const PetscInt idx) const
{
PetscScalar x;
- VecGetValues(*_v, 1, &idx, &x);
+ VecGetValues(_v, 1, &idx, &x);
return x;
}
@@ -210,13 +209,13 @@ class PETScVector
/// Get PETsc vector. Use it only for test purpose
const PETSc_Vec &getData() const
{
- return *_v;
+ return _v;
}
/// Initialize the vector with a constant value
void operator = (const PetscScalar val)
{
- VecSet(*_v, val);
+ VecSet(_v, val);
}
// TODO preliminary
@@ -226,7 +225,7 @@ class PETScVector
PETScVector& operator = (const PETScVector &v_in)
{
if (!_v) shallowCopy(v_in);
- VecCopy(*v_in._v, *_v);
+ VecCopy(v_in._v, _v);
return *this;
}
@@ -240,18 +239,18 @@ class PETScVector
void operator += (const PETScVector& v_in)
{
if (!_v) shallowCopy(v_in);
- VecAXPY(*_v, 1.0, *v_in._v);
+ VecAXPY(_v, 1.0, v_in._v);
}
/// Overloaded operator: subtract
void operator -= (const PETScVector& v_in)
{
if (!_v) shallowCopy(v_in);
- VecAXPY(*_v, -1.0, *v_in._v);
+ VecAXPY(_v, -1.0, v_in._v);
}
//! Exposes the underlying PETSc vector.
- PETSc_Vec* getRawVector() { return _v.get(); }
+ PETSc_Vec getRawVector() { return _v; }
/*! Exposes the underlying PETSc vector.
*
@@ -259,7 +258,7 @@ class PETScVector
* This method is dangerous insofar as you can do arbitrary things also
* with a const PETSc vector!
*/
- const PETSc_Vec* getRawVector() const {return _v.get(); }
+ PETSc_Vec getRawVector() const {return _v; }
/*! View the global vector for test purpose. Do not use it for output a big vector.
@@ -291,12 +290,12 @@ class PETScVector
void shallowCopy(const PETScVector &v);
private:
- void destroy() { if (_v) VecDestroy(_v.get()); _v.reset(nullptr); }
+ void destroy() { if (_v) VecDestroy(&_v); _v = nullptr; }
- std::unique_ptr<PETSc_Vec> _v;
+ PETSc_Vec _v = nullptr;
/// Local vector, which is only for the case that _v is created
/// with ghost entries.
- mutable PETSc_Vec _v_loc;
+ mutable PETSc_Vec _v_loc = nullptr;
/// Starting index in a rank
PetscInt _start_rank;