reference_counter.c

一个用来实现偏微分方程中网格的计算库

// $Id: reference_counter.C 2652 2008-02-07 21:41:59Z benkirk $

// The libMesh Finite Element Library.
// Copyright (C) 2002-2007  Benjamin S. Kirk, John W. Peterson
  
// 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



// C++ includes
#include <iostream>
#include <sstream>

// Local includes
#include "reference_counter.h"



// ------------------------------------------------------------
// ReferenceCounter class static member initializations
#if defined(ENABLE_REFERENCE_COUNTING) && defined(DEBUG)

ReferenceCounter::Counts ReferenceCounter::_counts;

#endif

Threads::atomic<unsigned int> ReferenceCounter::_n_objects;
Threads::spin_mutex  ReferenceCounter::_mutex;


// ------------------------------------------------------------
// ReferenceCounter class members
std::string ReferenceCounter::get_info ()
{
#if defined(ENABLE_REFERENCE_COUNTING) && defined(DEBUG)

  std::ostringstream out;
  
  out << '\n'
      << " ---------------------------------------------------------------------------- \n"
      << "| Reference count information                                                |\n"
      << " ---------------------------------------------------------------------------- \n";
  
  for (Counts::iterator it = _counts.begin();
       it != _counts.end(); ++it)
    {
      const std::string name(it->first);
      const unsigned int creations    = it->second.first;
      const unsigned int destructions = it->second.second;

      out << "| " << name << " reference count information:\n"
	  << "|  Creations:    " << creations    << '\n'
	  << "|  Destructions: " << destructions << '\n';
    }
  
  out << " ---------------------------------------------------------------------------- \n";

  return out.str();

#else

  return "";
  
#endif
}





void ReferenceCounter::print_info ()
{
#if defined(ENABLE_REFERENCE_COUNTING) && defined(DEBUG)
  
  std::cout << ReferenceCounter::get_info();
  
#endif
}