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103 lines (89 loc) · 2.74 KB
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#ifndef _Lock_hpp_
#define _Lock_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
#ifdef MINIFE_HAVE_TBB
#include <iostream>
#include <tbb/atomic.h>
namespace miniFE {
static tbb::atomic<size_t> miniFE_num_matrix_conflicts;
static tbb::atomic<size_t> miniFE_num_vector_conflicts;
//We have two lock classes, LockM and LockV. The only reason for
//this is so that they can separately track the number of conflicts
//for matrix accesses versus vector accesses (by incrementing the
//above counters).
//The LockingMatrix class uses LockM, LockingVector uses LockV.
template<typename T>
class LockM {
public:
// Constructors/destructors
LockM(tbb::atomic<T>& row)
: locked_row_(row)
{
if (++locked_row_ != 1) {
unsigned counter = 0;
while(locked_row_ != 1) {
++counter;
}
++miniFE_num_matrix_conflicts;
}
}
~LockM()
{ --locked_row_; }
private:
tbb::atomic<T>& locked_row_;
LockM(const LockM&);
LockM& operator=(const LockM&);
};
template<typename T>
class LockV {
public:
// Constructors/destructors
LockV(tbb::atomic<T>& row)
: locked_row_(row)
{
if (++locked_row_ != 1) {
unsigned counter = 0;
while(locked_row_ != 1) {
++counter;
}
++miniFE_num_vector_conflicts;
}
}
~LockV()
{ --locked_row_; }
private:
tbb::atomic<T>& locked_row_;
LockV(const LockV&);
LockV& operator=(const LockV&);
};
}//namespace miniFE
#else
#error "ERROR, this file shouldn't be compiled if MINIFE_HAVE_TBB isn't defined."
#endif
#endif