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case2vtk.py
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Jens Henrik Goebbert authoredJens Henrik Goebbert authored
LockingVector.hpp 2.37 KiB
#ifndef _LockingVector_hpp_
#define _LockingVector_hpp_
//@HEADER
// ************************************************************************
//
// miniFE: simple finite-element assembly and linear-solve
// Copyright (2006) Sandia Corporation
//
// Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
// license for use of this work by or on behalf of the U.S. Government.
//
// This library is free software; you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation; either version 2.1 of the
// License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA
// Questions? Contact Michael A. Heroux (maherou@sandia.gov)
//
// ************************************************************************
//@HEADER
#include <vector>
#include <Lock.hpp>
namespace miniFE {
template<typename VectorType>
class LockingVector {
public:
typedef typename VectorType::GlobalOrdinalType GlobalOrdinal;
typedef typename VectorType::ScalarType Scalar;
LockingVector(VectorType& x) : x_(x), myFirstRow_(0), myLastRow_(0), numMyRows_(0), row_locks_()
{
if (x_.local_size > 0) {
myFirstRow_ = x_.startIndex;
myLastRow_ = myFirstRow_ + x_.local_size - 1;
}
numMyRows_ = myLastRow_-myFirstRow_+1;
row_locks_.resize(numMyRows_);
}
void sum_in(size_t num_indices, const GlobalOrdinal* indices, const Scalar* values)
{
for(int i=0; i<num_indices; ++i) {
GlobalOrdinal row = indices[i];
int local_row = row - myFirstRow_;
if (local_row >= 0 && local_row < numMyRows_) {
LockV<int> lock(row_locks_[local_row]);
sum_into_vector(1, &row, &values[i], x_);
}
}
}
private:
VectorType& x_;
GlobalOrdinal myFirstRow_;
GlobalOrdinal myLastRow_;
size_t numMyRows_;
std::vector<tbb::atomic<int> > row_locks_;
};
}//namespace miniFE
#endif