bencher.hxx

00001 // bencher.hxx: this file is part of the Vaucanson project.
00002 //
00003 // Vaucanson, a generic library for finite state machines.
00004 //
00005 // Copyright (C) 2004, 2005 The Vaucanson Group.
00006 //
00007 // This program is free software; you can redistribute it and/or
00008 // modify it under the terms of the GNU General Public License
00009 // as published by the Free Software Foundation; either version 2
00010 // of the License, or (at your option) any later version.
00011 //
00012 // The complete GNU General Public Licence Notice can be found as the
00013 // `COPYING' file in the root directory.
00014 //
00015 // The Vaucanson Group consists of people listed in the `AUTHORS' file.
00016 //
00017 #ifndef VCSN_TOOLS_BENCHER_HXX
00018 # define VCSN_TOOLS_BENCHER_HXX
00019 
00020 # include <vaucanson/tools/bencher.hh>
00021 
00022 # ifdef VCSN_BENCH
00023 
00024 namespace vcsn
00025 {
00026 
00027   bencher::bencher() : start_(0), stop_(0)
00028   {}
00029 
00030   bencher::~bencher()
00031   {}
00032 
00033   void bencher::start()
00034   { start_ = dtime(); }
00035 
00036 
00037   void bencher::stop()
00038   { stop_ = dtime(); }
00039 
00040 
00041   double bencher::get_time()
00042   { return stop_ - start_; }
00043 
00044   double        bencher::dtime()
00045   {
00046     double              q;
00047     struct rusage       rusage;
00048 
00049     getrusage(RUSAGE_SELF, &rusage);
00050     q = (double)(rusage.ru_utime.tv_sec);
00051     q = q + (double)(rusage.ru_utime.tv_usec) * 1.0e-06;
00052     return q;
00053   }
00054 }
00055 # endif // ! VCSN_BENCH
00056 #endif // ! VCSN_TOOLS_BENCHER_HXX

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