include/MicroTimer.h

   1 /*
   2  * MicroTimer.h - simple high-precision timer
   3  *
   4  * Copyright (c) 2005-2009 Tobias Doerffel <tobydox/at/users.sourceforge.net>
   5  *
   6  * This file is part of Linux MultiMedia Studio - http://lmms.sourceforge.net
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2 of the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public
  19  * License along with this program (see COPYING); if not, write to the
  20  * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  21  * Boston, MA 02110-1301 USA.
  22  *
  23  */
  24
  25 #ifndef _MICRO_TIMER
  26 #define _MICRO_TIMER
  27
  28 #include "lmmsconfig.h"
  29
  30 #ifdef LMMS_HAVE_SYS_TIME_H
  31 #include <sys/time.h>
  32 #endif
  33
  34 #include <cstdlib>
  35 #include "lmms_basics.h"
  36
  37
  38 class MicroTimer
  39 {
  40 public:
  41         inline MicroTimer()
  42         {
  43                 reset();
  44         }
  45
  46         inline ~MicroTimer()
  47         {
  48         }
  49
  50         inline void reset()
  51         {
  52                 gettimeofday( &begin, NULL );
  53         }
  54
  55         inline int elapsed() const
  56         {
  57                 struct timeval now;
  58                 gettimeofday( &now, NULL );
  59                 return ( now.tv_sec - begin.tv_sec ) * 1000 * 1000 +
  60                                         ( now.tv_usec - begin.tv_usec );
  61         }
  62
  63
  64 private:
  65         struct timeval begin;
  66
  67 } ;
  68
  69
  70 #endif