OptFrame/Parallel/MapReduce++/util/Timer.hpp

#ifndef TIMER_HPP
#define TIMER_HPP

#include <cstdio>
#include <cstdlib>
#include <sys/time.h>

class Timer 
{
protected:
        struct timeval time1, time2;
    long elapsed_utime;    /* elapsed time in microseconds */
    long elapsed_mtime;    /* elapsed time in milliseconds */
    long elapsed_seconds;  /* diff between seconds counter */
    long elapsed_useconds; /* diff between microseconds counter */

        bool showMessageOnDestroy;
public:
        Timer()
        { 
                gettimeofday(&time1, NULL); 
                showMessageOnDestroy=true; 
        };
        Timer(bool m)
        { 
                gettimeofday(&time1, NULL); 
                showMessageOnDestroy=m; 
        };
        virtual ~Timer(){ if(showMessageOnDestroy) printf("Elapsed time: %.3f secs\n", now()); };
        virtual double now() 
        { 
                gettimeofday(&time2, NULL);
            elapsed_seconds  = time2.tv_sec  - time1.tv_sec;
            elapsed_useconds = time2.tv_usec - time1.tv_usec;
            elapsed_utime = (elapsed_seconds) * 1000000 + elapsed_useconds;
            elapsed_mtime = ((elapsed_seconds) * 1000 + elapsed_useconds/1000.0) + 0.5;
                return ( elapsed_mtime / 1000 + ( elapsed_mtime % 1000 ) * 0.001 ) ; 
        };
};

/* Old version
#include <ctime>

class Timer 
{
protected:
        clock_t initialTime;
        bool showMessageOnDestroy;
public:
        Timer(){ initialTime=clock(); showMessageOnDestroy=true; };
        Timer(bool m){ initialTime=clock(); showMessageOnDestroy=m; };

        virtual ~Timer(){ if(showMessageOnDestroy) printf("Spent time: %.3f secs\n", (double) (clock() - initialTime) / CLOCKS_PER_SEC ); };
        virtual double now() { return ((double)(clock() - initialTime) / CLOCKS_PER_SEC) ; };
};*/

#endif /* TIMER_HPP */