Source code

/******************************************************************************
 *
 * Copyright (c) 2009 Antillia.com TOSHIYUKI ARAI. ALL RIGHTS RESERVED.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer.
 *  
 * 2. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *
 *  PerformanceCounter.h
 *
 *****************************************************************************/

// SOL9
// 2009/05/21

#pragma once

#include <sol/Object.h>

namespace SOL {

class PerformanceCounter :public Object {
private:

  LARGE_INTEGER frequency;
  LARGE_INTEGER before;
  LARGE_INTEGER after;

public:
  /**
   *
   */
  PerformanceCounter()
  {
    memset(&frequency,  0, sizeof(frequency));
    memset(&before,     0, sizeof(before));
    memset(&after,      0, sizeof(after));
    QueryPerformanceFrequency(&frequency);

  }

public:
  void start()
  {
    memset(&before,     0, sizeof(before));
    memset(&after,      0, sizeof(after));
    QueryPerformanceCounter(&before);  
  }

public:
  void stop() 
  {
    QueryPerformanceCounter(&after);
  }


public:
  DWORD getSeconds()
  {
    return (DWORD)((after.QuadPart - before.QuadPart) / frequency.QuadPart);
  }


public:
  DWORD getMilliseconds()
  {
    return (DWORD)((after.QuadPart - before.QuadPart)*1000 / frequency.QuadPart);
  }


};

}