perftimer.h

图像分割算法

//Copyright (c) 2004-2005, Baris Sumengen
//All rights reserved.
//
// CIMPL Matrix Performance Library
//
//Redistribution and use in source and binary
//forms, with or without modification, are
//permitted provided that the following
//conditions are met:
//
//    * No commercial use is allowed. 
//    This software can only be used
//    for non-commercial purposes. This 
//    distribution is mainly intended for
//    academic research and teaching.
//    * Redistributions of source code must
//    retain the above copyright notice, this
//    list of conditions and the following
//    disclaimer.
//    * Redistributions of binary form must
//    mention the above copyright notice, this
//    list of conditions and the following
//    disclaimer in a clearly visible part 
//    in associated product manual, 
//    readme, and web site of the redistributed 
//    software.
//    * Redistributions in binary form must
//    reproduce the above copyright notice,
//    this list of conditions and the
//    following disclaimer in the
//    documentation and/or other materials
//    provided with the distribution.
//    * The name of Baris Sumengen may not be
//    used to endorse or promote products
//    derived from this software without
//    specific prior written permission.
//
//THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT
//HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
//EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT
//NOT LIMITED TO, THE IMPLIED WARRANTIES OF
//MERCHANTABILITY AND FITNESS FOR A PARTICULAR
//PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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#pragma once
#ifndef PERFTIMER_H
#define PERFTIMER_H

#include <iostream>
using std::cout;
using std::cerr;
using std::endl;

#include <time.h>

namespace CIMPL
{

	class PerfTimer
	{

	private:
		bool active;
		clock_t clockStart;
		clock_t elapsed;

	public:
		PerfTimer(void)
		{
			active = false;
			elapsed = 0;
		}
		~PerfTimer(void){}
		
		void Start()
		{
			if(!active)
			{
				active = true;
				clockStart = clock();
			}
			else
			{
				Utility::Warning("This performance timer is already active!");
			}
		}
		
		void Pause()
		{
			if(active)
			{
				elapsed += clock() - clockStart;
				active = false;
			}
			else
			{
				Utility::Warning("This performance timer is not active. You cannot pause it!");
			}
		}


		void Reset()
		{
			if(!active)
			{
				elapsed  = 0;
			}
			else
			{
				Utility::Warning("This performance timer is already active. You need to first pause it before resetting!");
			}
		}
		
		clock_t GetElapsed()
		{
			if(active)
			{
				elapsed += clock() - clockStart;
				active = false;
				Utility::Warning("This performance timer is still active.\nI am pausing it now automatically before calculating the elapsed time!");
			}
			return elapsed;
		}


		double GetElapsedSeconds()
		{
			if(active)
			{
				elapsed += clock() - clockStart;
				active = false;
				Utility::Warning("This performance timer is still active.\nI am pausing it now automatically before calculating the elapsed time!");
			}
			return (double)elapsed/CLOCKS_PER_SEC;
		}


		void DisplayElapsed()
		{
			if(active)
			{
				elapsed += clock() - clockStart;
				active = false;
				Utility::Warning("This performance timer is still active.\nI am pausing it now automatically before calculating the elapsed time!");
			}
			
			cout << "Elapsed CPU clocks: " << elapsed << endl;
		}
		
		void DisplayElapsedSeconds()
		{
			if(active)
			{
				elapsed += clock() - clockStart;
				active = false;
				Utility::Warning("This performance timer is still active.\nI am pausing it now automatically before calculating the elapsed time!");
			}
			
			cout << "Elapsed time: " << (double)elapsed/CLOCKS_PER_SEC  << " seconds" << endl;
		}
		
		
		
		// Simple interface
		void Tic()
		{
			if(!active)
			{
				elapsed = 0;
				active = true;
				clockStart = clock();
			}
			else
			{
				Utility::Warning("This performance timer is already active!");
			}
		}
		
		double Toc(bool display = true)
		{
			if(active)
			{
				elapsed += clock() - clockStart;
				active = false;
			}
			if(display)
			{
				cout << "Elapsed time: " << (double)elapsed/CLOCKS_PER_SEC << " seconds" << endl;
			}
			double tmp = (double)elapsed/CLOCKS_PER_SEC;
			elapsed = 0;
			return tmp;
		}
		
		
		
		
	};



}; //namespace



#endif