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      1 //=====================================================
      2 // File   :  portable_timer.hh
      3 // Author :  L. Plagne <laurent.plagne (at) edf.fr)> from boost lib
      4 // Copyright (C) EDF R&D,  lun sep 30 14:23:17 CEST 2002
      5 //=====================================================
      6 //
      7 // This program is free software; you can redistribute it and/or
      8 // modify it under the terms of the GNU General Public License
      9 // as published by the Free Software Foundation; either version 2
     10 // of the License, or (at your option) any later version.
     11 //
     12 // This program is distributed in the hope that it will be useful,
     13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
     14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     15 // GNU General Public License for more details.
     16 // You should have received a copy of the GNU General Public License
     17 // along with this program; if not, write to the Free Software
     18 // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
     19 //
     20 //  simple_time extracted from the boost library
     21 //
     22 #ifndef _PORTABLE_TIMER_HH
     23 #define _PORTABLE_TIMER_HH
     24 
     25 #include <ctime>
     26 #include <cstdlib>
     27 
     28 #include <time.h>
     29 
     30 
     31 #define USEC_IN_SEC 1000000
     32 
     33 
     34 //  timer  -------------------------------------------------------------------//
     35 
     36 //  A timer object measures CPU time.
     37 #ifdef _MSC_VER
     38 
     39 #define NOMINMAX
     40 #include <windows.h>
     41 
     42 /*#ifndef hr_timer
     43 #include "hr_time.h"
     44 #define hr_timer
     45 #endif*/
     46 
     47  class Portable_Timer
     48  {
     49   public:
     50 
     51    typedef struct {
     52     LARGE_INTEGER start;
     53     LARGE_INTEGER stop;
     54    } stopWatch;
     55 
     56 
     57    Portable_Timer()
     58    {
     59 	 startVal.QuadPart = 0;
     60 	 stopVal.QuadPart = 0;
     61 	 QueryPerformanceFrequency(&frequency);
     62    }
     63 
     64    void start() { QueryPerformanceCounter(&startVal); }
     65 
     66    void stop() { QueryPerformanceCounter(&stopVal); }
     67 
     68    double elapsed() {
     69 	 LARGE_INTEGER time;
     70      time.QuadPart = stopVal.QuadPart - startVal.QuadPart;
     71      return LIToSecs(time);
     72    }
     73 
     74    double user_time() { return elapsed(); }
     75 
     76 
     77  private:
     78 
     79    double LIToSecs(LARGE_INTEGER& L) {
     80      return ((double)L.QuadPart /(double)frequency.QuadPart) ;
     81    }
     82 
     83    LARGE_INTEGER startVal;
     84    LARGE_INTEGER stopVal;
     85    LARGE_INTEGER frequency;
     86 
     87 
     88  }; // Portable_Timer
     89 
     90 #else
     91 
     92 #include <sys/time.h>
     93 #include <sys/resource.h>
     94 #include <unistd.h>
     95 #include <sys/times.h>
     96 
     97 class Portable_Timer
     98 {
     99  public:
    100 
    101   Portable_Timer()
    102   {
    103     m_clkid = BtlConfig::Instance.realclock ? CLOCK_REALTIME : CLOCK_PROCESS_CPUTIME_ID;
    104   }
    105 
    106   Portable_Timer(int clkid) : m_clkid(clkid)
    107   {}
    108 
    109   void start()
    110   {
    111     timespec ts;
    112     clock_gettime(m_clkid, &ts);
    113     m_start_time = double(ts.tv_sec) + 1e-9 * double(ts.tv_nsec);
    114 
    115   }
    116 
    117   void stop()
    118   {
    119     timespec ts;
    120     clock_gettime(m_clkid, &ts);
    121     m_stop_time = double(ts.tv_sec) + 1e-9 * double(ts.tv_nsec);
    122 
    123   }
    124 
    125   double elapsed()
    126   {
    127     return  user_time();
    128   }
    129 
    130   double user_time()
    131   {
    132     return m_stop_time - m_start_time;
    133   }
    134 
    135 
    136 private:
    137 
    138   int m_clkid;
    139   double m_stop_time, m_start_time;
    140 
    141 }; // Portable_Timer
    142 
    143 #endif
    144 
    145 #endif  // PORTABLE_TIMER_HPP
    146