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DaetkPetscVec.cpp
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DaetkPetscVec.cpp
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#include "DaetkPetscVec.h"
#include "Tracer.h"
namespace Daetk
{
namespace Petsc
{
namespace cc
{
#include "petsc.h"
#include "petscvec.h"
#include "petscdm.h"
#include "petscis.h"
}
using std::cerr;
using std::cout;
using std::endl;
using std::ostream;
using std::istream;
void Vec::copy(Vec& vIn)
{
using namespace cc;
VecCopy(vIn.castToPetsc(),rep_);
}
Vec::Registry Vec::vecRegistry;
Vec::Vec(int dim):
ownsVec_(false),
ownsScatter_(false),
ownsIndexSet_(false),
hasGhostPoints_(false),
firstAttachment_(true),
firstSetStride_(true),
isRegistered_(false),
dim_(dim),
base_(PetscVec_BASE),
stride_(1),
start_(0),
storageLength_(0),
lstorageLength_(0),
globalHigh_(0),
globalLow_(0),
localHigh_(0),
localLow_(0),
offSet_(0),
ldim_(0),
virtualGlobalHigh_(0),
virtualGlobalLow_(0),
p_(0),
pSave_(0),
globalIndexSet_(0),
myGlobalIndices_(0),
localIndexSet_(0),
myLocalIndices_(0),
virtualGlobalIndexSet_(0),
myVirtualGlobalIndices_(0),
dm_(0),
rep_(0)
{
Tracer tr("Petsc::Vec::Vec(int length)");
using namespace cc;
mpiComm_ = PETSC_COMM_SELF;
if (petSys_.isInitialized())
{
if (dim)
{
enterRegistry(dim);
if (!ownsVec_)
create(dim); //calls getStorageInfo and createStrideMappings
if (storageLength_ != dim)
cerr<<"problem in ctor"<<endl;
}
}
else
{
if (dim!=0)
{
cerr<<"Construct a PetscSys object to initialize MPI before before attempting to construct vectors"<<endl;
exit(1);
}
}
}
void Vec::getStorageInfo()
{
using namespace cc;
Petsc::Err ierr;
ierr = VecGetSize(rep_,&storageLength_);
ierr = VecGetLocalSize(rep_,&lstorageLength_);
ierr = VecGetOwnershipRange(rep_,&globalLow_,&globalHigh_);
assert( (globalHigh_-globalLow_) == lstorageLength_ );
localLow_ = 0;
localHigh_ = lstorageLength_;
}
void Vec::create(int length)
{
using namespace cc;
Petsc::Err ierr;
ownsVec_ = true;
mpiComm_ = PETSC_COMM_WORLD;
ierr = VecCreateMPI(PETSC_COMM_WORLD,PETSC_DECIDE,length,&rep_);
ierr = VecSetFromOptions(rep_);
getLocal();
getStorageInfo();
createStrideMappings();
}
void Vec::createWithLocal(int local_length)
{
using namespace cc;
Petsc::Err ierr;
ownsVec_ = true;
mpiComm_ = PETSC_COMM_WORLD;
ierr = VecCreateMPI(PETSC_COMM_WORLD,local_length,PETSC_DETERMINE,&rep_);
ierr = VecSetFromOptions(rep_);
getLocal();
getStorageInfo();
dim_ = storageLength_/stride_;
createStrideMappings();
}
Vec::Vec(int dim, const real& initialValue, int base,int stride):
ownsVec_(false),
ownsScatter_(false),
ownsIndexSet_(false),
hasGhostPoints_(false),
firstAttachment_(true),
firstSetStride_(true),
isRegistered_(false),
dim_(dim),
base_(base),
stride_(stride),
start_(0),
storageLength_(0),
lstorageLength_(0),
globalHigh_(0),
globalLow_(0),
localHigh_(0),
localLow_(0),
offSet_(0),
ldim_(0),
virtualGlobalHigh_(0),
virtualGlobalLow_(0),
p_(0),
pSave_(0),
globalIndexSet_(0),
myGlobalIndices_(0),
localIndexSet_(0),
myLocalIndices_(0),
virtualGlobalIndexSet_(0),
myVirtualGlobalIndices_(0),
dm_(0),
rep_(0)
{
Tracer tr("Petsc::Vec::Vec(int dim, const real& initialValue, int base,int stride)");
using namespace cc;
mpiComm_ = PETSC_COMM_SELF;
assert(petSys_.isInitialized());
int tmp=dim*stride;
enterRegistry(dim*stride);
if (!ownsVec_)
create(dim*stride);
if (storageLength_ != tmp)
cerr<<"prob in ctor2"<<endl;
(*this) = initialValue;
}
Vec::Vec(const Vec& v):
ownsVec_(false),
ownsScatter_(false),
ownsIndexSet_(false),
hasGhostPoints_(false),
firstAttachment_(true),
firstSetStride_(true),
isRegistered_(false),
dim_(v.dim_),
base_(v.base_),
stride_(v.stride_),
start_(v.start_),
storageLength_(0),
lstorageLength_(0),
globalHigh_(0),
globalLow_(0),
localHigh_(0),
localLow_(0),
offSet_(0),
ldim_(0),
virtualGlobalHigh_(0),
virtualGlobalLow_(0),
p_(0),
pSave_(0),
globalIndexSet_(0),
myGlobalIndices_(0),
localIndexSet_(0),
myLocalIndices_(0),
virtualGlobalIndexSet_(0),
myVirtualGlobalIndices_(0),
dm_(0),
rep_(0)
{
using namespace cc;
Petsc::Err ierr;
mpiComm_ = PETSC_COMM_SELF;
Tracer tr("Petsc::Vec::Vec(const Petsc::Vec& v)");
if (petSys_.isInitialized())
{
if (dim_)
{
enterRegistry(v.storageLength_);
if (!ownsVec_)
{
ownsVec_ = true;
mpiComm_ = v.mpiComm_;
ierr = VecDuplicate(v.rep_,&rep_);
ierr = VecCopy(v.rep_,rep_);
getLocal();
getStorageInfo();
createStrideMappings();
}
else
(*this) = v;
if (storageLength_ != v.storageLength_)
cerr<<"problem in copy ctor"<<endl;
}
}
else
if (dim_!=0)
{
cerr<<"Construct a PetscSys object to initialize MPI before before attempting to construct vectors"<<endl;
exit(1);
}
}
Vec::Vec(Vec::CopyType t, real* a, int localDim, int base, int stride):
ownsVec_(false),
ownsScatter_(false),
ownsIndexSet_(false),
hasGhostPoints_(false),
firstAttachment_(true),
firstSetStride_(true),
isRegistered_(false),
dim_(0),
base_(PetscVec_BASE),
stride_(1),
start_(0),
storageLength_(0),
lstorageLength_(0),
globalHigh_(0),
globalLow_(0),
localHigh_(0),
localLow_(0),
offSet_(0),
ldim_(0),
virtualGlobalHigh_(0),
virtualGlobalLow_(0),
p_(0),
pSave_(0),
globalIndexSet_(0),
myGlobalIndices_(0),
localIndexSet_(0),
myLocalIndices_(0),
virtualGlobalIndexSet_(0),
myVirtualGlobalIndices_(0),
dm_(0),
rep_(0)
{
using namespace cc;
mpiComm_ = PETSC_COMM_SELF;
if (t)
{
attachToArray(a,localDim,base,stride);
}
else
{
clear();
base_ = base;
stride_ = stride;
createWithLocal(localDim*stride);
for (int i=0;i<ldim_;i++)
set(i) = a[i*stride_];
}
}
Vec::Vec(Vec::CopyType ref,const Vec& V, const Daetk::Petsc::VecIndex& VI):
ownsVec_(false),
ownsScatter_(false),
ownsIndexSet_(false),
hasGhostPoints_(false),
firstAttachment_(true),
firstSetStride_(true),
isRegistered_(false),
dim_(VI.end() - VI.start() + 1),
base_(V.base_),
stride_(V.stride_),
start_(VI.start() - V.base_ + V.start_),
storageLength_(0),
lstorageLength_(0),
globalHigh_(0),
globalLow_(0),
localHigh_(0),
localLow_(0),
offSet_(0),
ldim_(0),
virtualGlobalHigh_(0),
virtualGlobalLow_(0),
p_(V.p_),
pSave_(V.pSave_),
globalIndexSet_(0),
myGlobalIndices_(0),
localIndexSet_(0),
myLocalIndices_(0),
virtualGlobalIndexSet_(0),
myVirtualGlobalIndices_(0),
dm_(V.dm_),
rep_(V.rep_)
{
using namespace cc;
mpiComm_ = PETSC_COMM_SELF;
if (VI.all())
{
dim_=V.dim_;
start_=V.start_;
}
Tracer tr("Petsc::Vec::Vec(Petsc::Vec::CopyType t,const Vec& V, const Petsc::VecIndex& VI)");
assert(petSys_.isInitialized());
attachToVec(ref,V,VI);
}
Vec::Vec(Vec::StorageType t, cc::_p_DM* dm):
ownsVec_(true),
ownsScatter_(false),
ownsIndexSet_(false),
firstAttachment_(true),
firstSetStride_(true),
isRegistered_(false),
dim_(0),
base_(PetscVec_BASE),
stride_(1),
start_(0),
storageLength_(0),
lstorageLength_(0),
globalHigh_(0),
globalLow_(0),
localHigh_(0),
localLow_(0),
offSet_(0),
ldim_(0),
virtualGlobalHigh_(0),
virtualGlobalLow_(0),
p_(0),
pSave_(0),
globalIndexSet_(0),
myGlobalIndices_(0),
localIndexSet_(0),
myLocalIndices_(0),
virtualGlobalIndexSet_(0),
myVirtualGlobalIndices_(0),
dm_(dm),
rep_(0)
{
Tracer tr("Petsc::Vec::StorageType t, Petsc::cc:_p_DM* dm)");
using namespace cc;
Petsc::Err ierr;
mpiComm_=PETSC_COMM_SELF;
assert(petSys_.isInitialized());
if (t == LOCAL)
{
hasGhostPoints_ = true;
mpiComm_=PETSC_COMM_SELF;
ierr = DMCreateLocalVector(dm,&rep_);
}
else
{
mpiComm_=PETSC_COMM_WORLD;
hasGhostPoints_ = false;
ierr = DMCreateGlobalVector(dm,&rep_);
}
ierr = VecSetFromOptions(rep_);
getLocal();
getStorageInfo();
dim_ = storageLength_;
createStrideMappings();
}
Vec::Vec(const CMRVec<real>& vin):
ownsVec_(false),
ownsScatter_(false),
ownsIndexSet_(false),
hasGhostPoints_(false),
firstAttachment_(true),
firstSetStride_(true),
isRegistered_(false),
dim_(vin.dim()),
base_(PetscVec_BASE),
stride_(1),
start_(0),
storageLength_(0),
lstorageLength_(0),
globalHigh_(0),
globalLow_(0),
localHigh_(0),
localLow_(0),
offSet_(0),
ldim_(0),
virtualGlobalHigh_(0),
virtualGlobalLow_(0),
p_(0),
pSave_(0),
globalIndexSet_(0),
myGlobalIndices_(0),
localIndexSet_(0),
myLocalIndices_(0),
virtualGlobalIndexSet_(0),
myVirtualGlobalIndices_(0),
dm_(0),
rep_(0)
{
using namespace cc;
Petsc::Err ierr;
mpiComm_=PETSC_COMM_SELF;
Tracer tr("Petsc::Vec::Vec(int length)");
if (petSys_.isInitialized())
{
int dim=vin.dim();
ierr = MPI_Bcast(&dim,1,MPI_INT,0,cc::PETSC_COMM_WORLD);
enterRegistry(dim);
if (!ownsVec_)
create(dim); //calls getStorageInfo and createStrideMappings
cc::Vec gVec;
ierr = DMDACreateNaturalVector(dm_,&gVec);
restoreLocal();
if (petSys_.master())
{
int* ix = new int[dim];
for (int i=0;i<dim;i++)
ix[i]=i;
ierr = VecSetValues(gVec,dim,ix,vin.castToConstArray(),INSERT_VALUES);
ierr = VecAssemblyBegin(gVec);
ierr = VecAssemblyEnd(gVec);
delete [] ix;
}
else
{
ierr = VecAssemblyBegin(gVec);
ierr = VecAssemblyEnd(gVec);
}
ierr = DMDANaturalToGlobalBegin(dm_,gVec,INSERT_VALUES,rep_);
ierr = DMDANaturalToGlobalEnd(dm_,gVec,INSERT_VALUES,rep_);
getLocal();
VecDestroy(&gVec);
if (storageLength_ != dim)
cerr<<"trouble in ctor4"<<endl;
}
else
{
if (vin.dim()!=0)
{
cerr<<"Construct a PetscSys object to initialize MPI before before attempting to construct vectors"<<endl;
exit(1);
}
}
}
Vec::~Vec()
{
clear();
}
Vec& Vec::operator=(const Vec& V)
{
#ifdef PETSCVEC_BOUNDS_CHECK
assert(checkConformance(V));
#endif
int i=0;
for (i=0;i<ldim_;i++)
set(i) = V.get(i);
return *this;
}
Vec& Vec::operator=(const real& a)
{
int i=0;
for (i=0;i<ldim_;i++)
set(i) = a;
return *this;
}
Vec& Vec::operator*=(const real &a)
{
int i=0;
for (i=0;i<ldim_;i++)
set(i)*=a;
return *this;
}
Vec& Vec::operator/=(const real &a)
{
int i=0;
for (i=0;i<ldim_;i++)
set(i)/=a;
return *this;
}
Vec& Vec::operator+=(const Vec& y)
{
#ifdef PETSCVEC_BOUNDS_CHECK
assert(checkConformance(y));
#endif
int i=0;
for (i=0;i<ldim_;i++)
set(i)+=y.get(i);
return *this;
}
Vec& Vec::operator-=(const Vec& y)
{
#ifdef PETSCVEC_BOUNDS_CHECK
assert(checkConformance(y));
#endif
int i=0;
for (i=0;i<ldim_;i++)
set(i)-=y.get(i);
return *this;
}
Vec& Vec::newsize( Vec::StorageType t, cc::_p_DM* dm)
{
using namespace cc;
Petsc::Err ierr;
Tracer tr("Petsc::Vec::newsize(Petsc::Vec::StorageType t, Petsc::cc:_p_DM* dm)");
assert(petSys_.isInitialized());
if (t == LOCAL)
{
clear();
mpiComm_=PETSC_COMM_SELF;
hasGhostPoints_ = true;
ierr = DMCreateLocalVector(dm,&rep_);
ownsVec_ = true;
}
else
{
cc::_p_Vec* newRep_;
ierr = DMCreateGlobalVector(dm,&newRep_);
int newStorageLength_;
ierr = VecGetSize(newRep_,&newStorageLength_);
if (storageLength_ == newStorageLength_)
{
restoreLocal();
//copy old vector into new vector layout
VecScatter ctx;
IS is;
ierr = ISCreateStride(mpiComm_,storageLength_,0,1,&is);
ierr = VecScatterCreate(rep_,is,newRep_,is,&ctx);
// ierr = VecScatterBegin(rep_,newRep_,INSERT_VALUES ,SCATTER_FORWARD, ctx);
ierr = VecScatterBegin(ctx,rep_,newRep_,INSERT_VALUES ,SCATTER_FORWARD);
// ierr = VecScatterEnd(rep_,newRep_,INSERT_VALUES ,SCATTER_FORWARD, ctx);
ierr = VecScatterEnd(ctx,rep_,newRep_,INSERT_VALUES ,SCATTER_FORWARD);
ierr = VecScatterDestroy(&ctx);
ierr = ISDestroy(&is);
getLocal();
}
clear();
mpiComm_=PETSC_COMM_WORLD;
rep_ = newRep_;
ownsVec_ = true;
}
dm_=dm;
//ierr = VecSetFromOptions(rep_);
getLocal();
getStorageInfo();
dim_ = storageLength_;
createStrideMappings();
return *this;
}
Vec& Vec::newsize(int n)
{
Tracer tr("Petsc::Vec::newsize( int n)");
clear();
enterRegistry(n);
if (!ownsVec_)
{
dim_=n;
stride_=1;
create(n);
}
if (storageLength_ != n)
cerr<<"st ctor5"<<endl;
return *this;
}
Vec& Vec::newsizeSerial(int n)
{
using namespace cc;
Petsc::Err ierr;
Tracer tr("Petsc::Vec::newsize( int n)");
clear();
dim_=n;
stride_=1;
ownsVec_ = true;
mpiComm_ = PETSC_COMM_SELF;
ierr = VecCreateSeq(PETSC_COMM_SELF,n,&rep_);
ierr = VecSetFromOptions(rep_);
getLocal();
getStorageInfo();
createStrideMappings();
if (storageLength_ != n)
cerr<<"st ctor5"<<endl;
return *this;
}
Vec& Vec::newsize(Vec::StorageType t,int n)
{
//confusing, the LOCAL vector here would be global
Tracer tr("Vec::newsize( int n)");
clear();
if (t == GLOBAL)
{
enterRegistry(n);
if (!ownsVec_)
{
dim_=n;
stride_=1;
create(n);
}
if (storageLength_ != n)
cerr<<"probleme"<<endl;
}
else
{
ldim_=n;
stride_=1;
createWithLocal(n);
}
return *this;
}
Vec& Vec::redim( int n)
{
newsize(n);
return *this;
}
Vec& Vec::setStride( int newStride)
{
int virtualStorageLength = (dim_*stride_);
dim_ = virtualStorageLength / newStride + ((virtualStorageLength%newStride > 0) ? 1 : 0);
stride_ = newStride;
int storBefore=storageLength_;
getStorageInfo();
if (storBefore!=storageLength_)
{
cerr<<"storage length changed"<<endl;
if (isRegistered_)
cerr<<"vec is registered as length "<<storBefore<<endl;
}
createStrideMappings();
return *this;
}
Vec& Vec::setStrideMulti( int newStride)
{
if (firstSetStride_)
{
int virtualStorageLength = (dim_*stride_);
dim_ = virtualStorageLength / newStride + ((virtualStorageLength%newStride > 0) ? 1 : 0);
stride_ = newStride;
int storBefore=storageLength_;
getStorageInfo();
if (storBefore!=storageLength_)
{
cerr<<"storage length changed"<<endl;
if (isRegistered_)
cerr<<"vec is registered as length "<<storBefore<<endl;
}
createStrideMappings();
firstSetStride_ = false;
}
//else do nothing
return *this;
}
Vec& Vec::setBlockStrideMulti( int newStride, int newBlock)
{
if (firstSetStride_)
{
int virtualStorageLength = (dim_*stride_);
dim_ = (virtualStorageLength / newStride)*newBlock + ((virtualStorageLength%newStride > 0) ? 1 : 0);
stride_ = newStride;
int storBefore=storageLength_;
getStorageInfo();
if (storBefore!=storageLength_)
{
cerr<<"storage length changed"<<endl;
if (isRegistered_)
cerr<<"vec is registered as length "<<storBefore<<endl;
}
createBlockStrideMappings(newBlock);
firstSetStride_ = false;
}
//else do nothing
return *this;
}
Vec& Vec::setBase(int b)
{
base_=b;
createStrideMappings();
return *this;
}
// bool Vec::isValid() const
// {
// cc::PetscBool flg;
// Petsc::Err ierr;
// ierr = Petsc::VecValid(rep_,&flg);
// return flg;
// }
real Vec::sum()
{
real m;
Petsc::Err ierr;
restoreLocal();
ierr = cc::VecSum(rep_,&m);
getLocal();
return m;
}
void Vec::restoreLocal() const
{
Petsc::Err ierr;
if (p_ && rep_)
{
pSave_ = p_;
//mwf gcc 3.3 has problem parsing cc:: here because VecRestoreArray
// is a macro?
//ierr = cc::VecRestoreArray(rep_,&p_);
using namespace cc;
ierr = VecRestoreArray(rep_,&p_);
p_=0;
hasLocal_=false;
}
}
void Vec::getLocal() const
{
Petsc::Err ierr;
if (!p_ && rep_)
{
//mwf gcc 3.3 has problem parsing cc:: here because VecRestoreArray
// is a macro?
//ierr = cc::VecGetArray(rep_,&p_);
using namespace cc;
ierr = VecGetArray(rep_,&p_);
if (pSave_ && pSave_ != p_)
{
cerr<<"Petsc has changed the location of the local array."<<endl
<<"References to this vector are now out of date"<<endl;
pSave_ = p_;
}
else
pSave_ = p_;
hasLocal_=true;
}
}
void Vec::startAssembly()
{
Petsc::Err ierr;
restoreLocal();
ierr = cc::VecAssemblyBegin(rep_);
}
void Vec::endAssembly()
{
Petsc::Err ierr;
ierr = cc::VecAssemblyEnd(rep_);
getLocal();
}
void Vec::startSetFromGlobalMulti(const Vec& global)
{
using namespace cc;
Petsc::Err ierr;
restoreLocal();
global.restoreLocal();
if (!ownsScatter_)
{
VecScatter dm_gtol_,dm_ltol_;
ierr = DMDAGetScatter(dm_,&dm_gtol_,&dm_ltol_);
ierr = VecScatterCopy(dm_gtol_,&my_gtol_);
ownsScatter_=true;
}
// ierr = VecScatterBegin(global.rep_,rep_,
// INSERT_VALUES,SCATTER_FORWARD,
// my_gtol_);
ierr = VecScatterBegin(my_gtol_,global.rep_,rep_,
INSERT_VALUES,SCATTER_FORWARD);
// ierr = DMGlobalToLocalBegin(dm_,global.rep_,INSERT_VALUES,rep_);
// global.getLocal();
// getLocal();
}
void Vec::endSetFromGlobalMulti(const Vec& global)
{
Petsc::Err ierr;
// restoreLocal();
// global.restoreLocal();
//ierr = DMGlobalToLocalEnd(dm_,global.rep_,INSERT_VALUES,rep_);
using namespace cc;
// ierr = VecScatterEnd(global.rep_,rep_,
// INSERT_VALUES,SCATTER_FORWARD,
// my_gtol_);
ierr = VecScatterEnd(my_gtol_,
global.rep_,rep_,
INSERT_VALUES,SCATTER_FORWARD);
global.getLocal();
getLocal();
}
void Vec::startSetFromGlobal(const Vec& global)
{
Petsc::Err ierr;
restoreLocal();
global.restoreLocal();
using namespace cc;
ierr = DMGlobalToLocalBegin(dm_,global.rep_,INSERT_VALUES,rep_);
}
void Vec::endSetFromGlobal(const Vec& global)
{
using namespace cc;
Petsc::Err ierr;
ierr = DMGlobalToLocalEnd(dm_,global.rep_,INSERT_VALUES,rep_);
global.getLocal();
getLocal();
}
void Vec::setFromLocal(const Vec& local)
{
using namespace cc;
Petsc::Err ierr;
restoreLocal();
local.restoreLocal();
ierr = DMLocalToGlobalBegin(dm_,local.rep_,INSERT_VALUES,rep_);
ierr = DMLocalToGlobalEnd(dm_,local.rep_,INSERT_VALUES,rep_);
local.getLocal();
getLocal();
}
Vec& Vec::clear(bool deRegister)
{
Petsc::Err ierr;
//take this vec out of the registry
if (isRegistered_ && deRegister)
{
std::set<Vec*>::iterator it=vecRegistry[storageLength_].second.find(this);
if (this == vecRegistry[storageLength_].first)
vecRegistry[storageLength_].first = (Vec*)(0);
else if (it!=vecRegistry[storageLength_].second.end())
vecRegistry[storageLength_].second.erase(this);
else
{
//error. print the registry to help find problem
cerr<<"couldn't find vector in registry "<<storageLength_<<'\t'<<this<<endl;
cerr<<"printing registry"<<endl;
Vec::Registry::iterator ip=Vec::vecRegistry.begin();
while (ip != Vec::vecRegistry.end())
{
cerr<<"first "<<ip->first<<endl;
cerr<<"first a"<<ip->second.first<<endl;
std::set<Vec*>::iterator i=ip->second.second.begin();
while (i !=ip->second.second.end())
{
cerr<<*i<<endl;
++i;
}
++ip;
}
assert(0);
}
isRegistered_=false;
}
using namespace cc;
if (ownsVec_)
{
restoreLocal();
ierr = VecDestroy(&rep_);
ownsVec_ = false;
}
if (ownsScatter_)
{
VecScatterDestroy(&my_gtol_);
ownsScatter_ = false;
}
if (ownsIndexSet_)
{
ierr = ISRestoreIndices(globalIndexSet_,&myGlobalIndices_);
ierr = ISDestroy(&globalIndexSet_);
ierr = ISRestoreIndices(localIndexSet_,&myLocalIndices_);
ierr = ISDestroy(&localIndexSet_);
ierr = ISRestoreIndices(virtualGlobalIndexSet_,&myVirtualGlobalIndices_);
ierr = ISDestroy(&virtualGlobalIndexSet_);
ownsIndexSet_=false;
}
hasGhostPoints_=false;
firstAttachment_ = true;
firstSetStride_ = true;
dim_=0;
base_=0;
stride_=1;
start_=0;
storageLength_=0;
lstorageLength_=0;
globalHigh_=0;
globalLow_=0;
localHigh_=0;
localLow_=0;
offSet_=0;
ldim_=0;
virtualGlobalHigh_=0;
virtualGlobalLow_=0;
mpiComm_=PETSC_COMM_SELF;
pSave_=0;
return (*this);
}
Vec& Vec::attachToVec(Vec::CopyType ref,const Vec& V,const VecIndex& VI)
{
using namespace cc;
Petsc::Err ierr;
clear();
if (!V.p_)
V.getLocal();
if (VI.all())
{
dim_=V.dim_;
start_=V.start_;
}
else
{
dim_=VI.end() - VI.start() + 1;
start_=VI.start() - V.base_ + V.start_;
}
base_=V.base_;
stride_=V.stride_;
p_=V.p_;
pSave_ = V.pSave_;
rep_=V.rep_;
mpiComm_=V.mpiComm_;
//if this is just a ref this is all the information we need
getStorageInfo();
createStrideMappings();
if (!ref)
{
if (V.hasGhostPoints_)
{
std::cerr<<"attachToVec not implemented for non-reference copy of a local-ghosted vector, exiting"<<std::endl;
exit(1);
}
else
{
stride_ = 1;
start_ = 0;
createWithLocal(ldim_);
restoreLocal();