timer.hh

// Copyright (C) 2007, 2008, 2009 EPITA Research and Development
// Laboratory (LRDE)
//
// This file is part of Olena.
//
// Olena is free software: you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free
// Software Foundation, version 2 of the License.
//
// Olena 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
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Olena.  If not, see <http://www.gnu.org/licenses/>.
//
// As a special exception, you may use this file as part of a free
// software project without restriction.  Specifically, if other files
// instantiate templates or use macros or inline functions from this
// file, or you compile this file and link it with other files to produce
// an executable, this file does not by itself cause the resulting
// executable to be covered by the GNU General Public License.  This
// exception does not however invalidate any other reasons why the
// executable file might be covered by the GNU General Public License.


class timer
{
public:
  void start()
  {
    start_ = clock();
  }

  void stop()
  {
    end_ = clock();
    len = float(end_ - start_) / CLOCKS_PER_SEC;
  }

  float lenght()
  {
    return float(clock() - start_) / CLOCKS_PER_SEC;
  }

private:
  clock_t start_;
  clock_t end_;
  float len;
};


std::ostream& operator<<(std::ostream& ostr, timer t)
{
  return ostr << t.lenght() << "s";
}