timer.h

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// Timer.h
// =======
// High Resolution Timer.
// This timer is able to measure the elapsed time with 1 micro-second accuracy
// in both Windows, Linux and Unix system 
//
//  AUTHOR: Song Ho Ahn (song.ahn@gmail.com)
// CREATED: 2003-01-13
// UPDATED: 2006-01-13
//
// Copyright (c) 2003 Song Ho Ahn
 
#ifndef TUE_PROFILING_TIMER_H_
#define TUE_PROFILING_TIMER_H_
 
#ifdef WIN32   // Windows system specific
#include <windows.h>
#else          // Unix based system specific
#include <sys/time.h>
#endif
 
#include <iostream>
#include <string>
 
namespace tue
{
 
class Timer
{
public:
    Timer();
    ~Timer();
 
    void start();
    void stop();
 
    inline bool running() const { return running_; }
 
    long double getElapsedTime() const;
 
    long double getElapsedTimeInSec() const;
 
    long double getElapsedTimeInMilliSec() const;
 
    long double getElapsedTimeInMicroSec() const;
 
    void printLastElapsedTime(std::string);
    void printLastElapsedTimeMSec(std::string);
 
    static long double nowMicroSec();
 
    static long double nowMilliSec();
 
    static long double now();
 
 
private:
    bool running_;
 
#ifdef WIN32
 
    LARGE_INTEGER frequency_;
 
    LARGE_INTEGER startCount_;
 
    LARGE_INTEGER endCount_;
#else
 
    timeval start_count_;
 
    timeval end_count_;
#endif
};
 
}
 
#define TIMER_START Timer t; t.start();
#define TIMER_STOP(x) (t. printLastElapsedTime(x))
#define TIMER_STOP_M(x) (t.printLastElapsedTimeMSec(x))
 
#endif // TUE_PROFILING_TIMER_H_