measure.hpp

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/****************************************************************************\
 *                                 VRVis                                    *
 *                      http://vrvis.sourceforge.net                        *
 *                       (C) 2004 by Alex Loeffler                          *
 *                 mailto:aloeffler@users.sourceforge.net                   *
 ****************************************************************************
 *                                License                                   *
 *                                                                          *
 * This library is free software; you can redistribute it and/or modify it  *
 * under the terms of the GNU Library General Public License as published   *
 * by the Free Software Foundation, version 2.                              *
 *                                                                          *
 * 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        *
 * Library General Public License for more details.                         *
 *                                                                          *
 * You should have received a copy of the GNU Library General Public        *
 * License along with this library; if not, write to the Free Software      *
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\****************************************************************************/

#ifndef MEASURE_HPP
#define MEASURE_HPP

#include <sys/time.h>

#define DBG_START_TIMER                                                     \
        {                                                                   \
          struct timeval timeStart;                                         \
          struct timeval timeEnd;                                           \
          struct timeval timeDiff;                                          \
          if(gettimeofday(&timeStart, 0) == -1)                             \
          {                                                                 \
            std::cout << "[DBG-ERR] Failed to get start time."              \
                      << std::endl;                                         \
          }

#define DBG_STOP_TIMER(__label__)                                           \
          if(gettimeofday(&timeEnd, 0) == -1)                               \
          {                                                                 \
            std::cout << "[DBG-ERR] Failed to get end time."                \
                      << std::endl;                                         \
          }                                                                 \
          timeDiff.tv_sec  = timeEnd.tv_sec  - timeStart.tv_sec;            \
          timeDiff.tv_usec = timeEnd.tv_usec - timeStart.tv_usec;           \
          if (timeDiff.tv_usec < 0)                                         \
          {                                                                 \
            --timeDiff.tv_sec;                                              \
            timeDiff.tv_usec += 1000000;                                    \
          }                                                                 \
          std::cout << "[DBG] Time measurement '" << (__label__) << "':\t"  \
                    << timeDiff.tv_sec  << " secs, "                        \
                    << timeDiff.tv_usec << " usecs." << std::endl;          \
        }

#endif // MEASURE_HPP

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