DistributedVector.cpp

00001 /*
00002 
00003 Copyright (C) University of Oxford, 2005-2010
00004 
00005 University of Oxford means the Chancellor, Masters and Scholars of the
00006 University of Oxford, having an administrative office at Wellington
00007 Square, Oxford OX1 2JD, UK.
00008 
00009 This file is part of Chaste.
00010 
00011 Chaste is free software: you can redistribute it and/or modify it
00012 under the terms of the GNU Lesser General Public License as published
00013 by the Free Software Foundation, either version 2.1 of the License, or
00014 (at your option) any later version.
00015 
00016 Chaste is distributed in the hope that it will be useful, but WITHOUT
00017 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
00018 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
00019 License for more details. The offer of Chaste under the terms of the
00020 License is subject to the License being interpreted in accordance with
00021 English Law and subject to any action against the University of Oxford
00022 being under the jurisdiction of the English Courts.
00023 
00024 You should have received a copy of the GNU Lesser General Public License
00025 along with Chaste. If not, see <http://www.gnu.org/licenses/>.
00026 
00027 */
00028 
00029 
00030 #include "DistributedVector.hpp"
00031 #include "DistributedVectorFactory.hpp"
00032 
00033 
00034 
00035 bool DistributedVector::IsGlobalIndexLocal(unsigned globalIndex)
00036 {
00037     return (mLo<=globalIndex && globalIndex<mHi);
00038 }
00039 
00040 DistributedVector::DistributedVector(Vec vec, DistributedVectorFactory* pFactory)
00041     : mVec(vec),
00042       mpFactory(pFactory)
00043 {
00044     assert(pFactory != NULL);
00045 
00046     // Set local copies of problem size, etc.
00047     mProblemSize = pFactory->GetProblemSize();
00048     mLo = pFactory->GetLow();
00049     mHi = pFactory->GetHigh();
00050 
00051     // Set mSizeMultiplier by reading the vec size.
00052     VecGetArray(vec, &mpVec);
00053     PetscInt size;
00054     VecGetSize(vec, &size);
00055     mSizeMultiplier = (unsigned) size / mProblemSize;
00056     assert ((mSizeMultiplier * mProblemSize) == (unsigned)size);
00057 }
00058 
00059 double& DistributedVector::operator[](unsigned globalIndex) throw (DistributedVectorException)
00060 {
00061     assert(mSizeMultiplier==1);
00062     if (mLo<=globalIndex && globalIndex<mHi)
00063     {
00064         return mpVec[globalIndex - mLo];
00065     }
00066     throw DistributedVectorException();
00067 }
00068 
00069 double& DistributedVector::operator[](Iterator index) throw (DistributedVectorException)
00070 {
00071     assert(mSizeMultiplier==1);
00072     return mpVec[index.Local];
00073 }
00074 
00075 void DistributedVector::Restore()
00076 {
00077     VecRestoreArray(mVec, &mpVec);
00078     VecAssemblyBegin(mVec);
00079     VecAssemblyEnd(mVec);
00080 }
00081 
00082 //
00083 // Iterator class
00084 //
00085 
00086 
00087 bool DistributedVector::Iterator::operator!=(const Iterator& rOther)
00088 {
00089    return(Global != rOther.Global);
00090 }
00091 
00092 DistributedVector::Iterator& DistributedVector::Iterator::operator++()
00093 {
00094     Local++;
00095     Global++;
00096     return(*this);
00097 }
00098 
00099 //
00100 // Iterator creation
00101 //
00102 
00103 DistributedVector::Iterator DistributedVector::Begin()
00104 {
00105     Iterator index;
00106     index.Local = 0;
00107     index.Global = mLo;
00108     return index;
00109 }
00110 
00111 DistributedVector::Iterator DistributedVector::End()
00112 {
00113     Iterator index;
00114     index.Local = mHi-mLo;
00115     index.Global = mHi;
00116     return index;
00117 }
00118 

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