include/NanoTimer.h

   1 /***************************************************************************
   2  *                                                                         *
   3  *    Copyright (C) Lakshya Solutions Ltd. All rights reserved.            *
   4  *                                                                         *
   5  ***************************************************************************/
   6
   7 #ifndef NANO_TIMER_H
   8 #define NANO_TIMER_H
   9 #include<time.h>
  10 #include<limits.h>
  11 class NanoTimer
  12 {
  13     long long max_, min_, total, count, last_;
  14     struct timespec begin;
  15     struct timespec end;
  16
  17     public:
  18     NanoTimer() {  reset(); }
  19     void reset() {  max_ = 0; min_ = LONG_MAX; total =0; count = 0; last_ =0; }
  20     void start()
  21     {
  22         count++;
  23         clock_gettime(CLOCK_REALTIME, &begin);
  24     }
  25     void stop()
  26     {
  27         clock_gettime(CLOCK_REALTIME, &end);
  28         long long secs = end.tv_sec-begin.tv_sec;
  29         long long nano = end.tv_nsec-begin.tv_nsec;
  30         last_ = (secs*1000000000)+nano;
  31         total += last_;
  32         if ( max_ < last_ ) max_ = last_;
  33         if ( min_ > last_ ) min_ = last_;
  34     }
  35     long long last() { return last_; }
  36     long long avg() { return total/count; }
  37     long long sum() { return total; }
  38     long long min() { return min_; }
  39     long long max() { return max_; }
  40 };
  41
  42 #endif