DistributedVectorFactory.hpp

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*/
 
#ifndef DISTRIBUTEDVECTORFACTORY_HPP_
#define DISTRIBUTEDVECTORFACTORY_HPP_
 
#include "ChasteSerialization.hpp"
#include <petscvec.h>
 
#include "DistributedVector.hpp"
#include "Exception.hpp"
#include "PetscTools.hpp"
 
 class DistributedVectorFactory
{
private:
 
    // Data global to all vectors created by this factory
 
    unsigned mLo;
 
    unsigned mHi;
 
    unsigned mProblemSize;
 
    unsigned mNumProcs;
 
    bool mPetscStatusKnown;
 
    std::vector<unsigned> mGlobalLows;
 
    static bool msCheckNumberOfProcessesOnLoad;
 
    DistributedVectorFactory* mpOriginalFactory;
 
    void CheckForPetsc();
 
    void CalculateOwnership(Vec vec);
 
    friend class boost::serialization::access;
 
    template<class Archive>
    void serialize(Archive & archive, const unsigned int version)
    {
        // Nothing to do - all done in load_construct_data
    }
 
public:
 
    DistributedVectorFactory(Vec vec);
 
    DistributedVectorFactory(unsigned size, PetscInt local=PETSC_DECIDE);
 
    DistributedVectorFactory(DistributedVectorFactory* pOriginalFactory);
 
    DistributedVectorFactory(unsigned lo, unsigned hi, unsigned size,
                             unsigned numProcs=PetscTools::GetNumProcs());
 
    ~DistributedVectorFactory();
 
    Vec CreateVec();
 
    Vec CreateVec(unsigned stride);
 
    DistributedVector CreateDistributedVector(Vec vec, bool readOnly=false);
 
    bool IsGlobalIndexLocal(unsigned globalIndex);
 
    unsigned GetLocalOwnership() const
    {
        return mHi - mLo;
    }
 
    unsigned GetHigh() const
    {
        return mHi;
    }
 
    unsigned GetLow() const
    {
        return mLo;
    }
 
    unsigned GetProblemSize() const
    {
        return mProblemSize;
    }
 
    unsigned GetNumProcs() const
    {
        return mNumProcs;
    }
 
    static void SetCheckNumberOfProcessesOnLoad(bool checkNumberOfProcessesOnLoad=true)
    {
        msCheckNumberOfProcessesOnLoad = checkNumberOfProcessesOnLoad;
    }
 
    static bool CheckNumberOfProcessesOnLoad()
    {
        return msCheckNumberOfProcessesOnLoad;
    }
 
    DistributedVectorFactory* GetOriginalFactory()
    {
        return mpOriginalFactory;
    }
 
    void SetOriginalFactory(DistributedVectorFactory* pOriginalFactory)
    {
        mpOriginalFactory = pOriginalFactory;
    }
 
    void SetFromFactory(DistributedVectorFactory* pFactory);
 
    std::vector<unsigned> &rGetGlobalLows();
 
//    /**
//     * For debugging.
//     */
//    void Dump(std::string msg=std::string())
//    {
//        std::cout << "DVF(" << this << "): " << msg;
//        std::cout << " lo=" << mLo << " hi=" << mHi << " size=" << mProblemSize << " np=" << mNumProcs;
//        std::cout << " [running np=" << PetscTools::GetNumProcs() << " rank=" << PetscTools::GetMyRank() << "]\n" << std::flush;
//    }
};
 
#include "SerializationExportWrapper.hpp"
// Declare identifier for the serializer
CHASTE_CLASS_EXPORT(DistributedVectorFactory)
 
namespace boost
{
namespace serialization
{
 
template<class Archive>
inline void save_construct_data(
    Archive & ar, const DistributedVectorFactory * t, const unsigned int file_version)
{
    unsigned num_procs, lo, hi, size;
    hi = t->GetHigh();
    ar << hi;
    lo = t->GetLow();
    ar << lo;
    size = t->GetProblemSize();
    ar << size;
    num_procs = PetscTools::GetNumProcs();
    ar << num_procs;
}
 
template<class Archive>
inline void load_construct_data(
    Archive & ar, DistributedVectorFactory * t, const unsigned int file_version)
{
    unsigned num_procs, lo, hi, size;
    ar >> hi;
    ar >> lo;
    ar >> size;
    ar >> num_procs;
    DistributedVectorFactory* p_original_factory = new DistributedVectorFactory(lo, hi, size, num_procs);
 
    if (!DistributedVectorFactory::CheckNumberOfProcessesOnLoad())
    {
        ::new(t)DistributedVectorFactory(p_original_factory);
    }
    else
    {
        if (num_procs != PetscTools::GetNumProcs())
        {
            // We need to have a ::new here, or Boost will try to free non-allocated memory
            // when the exception is thrown.  However, if we use the ::new line after this if,
            // then PETSc complains about wrong sizes.
            ::new(t)DistributedVectorFactory(size);
            EXCEPTION("This archive was written for a different number of processors");
        }
        ::new(t)DistributedVectorFactory(size, hi-lo);
        t->SetOriginalFactory(p_original_factory);
    }
}
 
}
} // namespace ...
 
#endif /*DISTRIBUTEDVECTORFACTORY_HPP_*/