FIFO.H

// --fifo.h--------------------------------------------------------------------- 
//  
//  Defines the fifo object 
// 
// Copyright (C) Microsoft Corp. 1986-1996.  All Rights Reserved. 
// ----------------------------------------------------------------------------- 
 
#ifndef __FIFO_H 
#define __FIFO_H 
 
#include <windows.h> 
 
//$--CFIFO---------------------------------------------------------------------- 
//  Defines the CFIFO object, a First In First Out Buffer. 
// ----------------------------------------------------------------------------- 
class CFIFO 
{ 
public: 
    CFIFO(void); 
    virtual ~CFIFO(void); 
    HRESULT HrReset(IN DWORD maxElements); 
    VOID PushElement(IN DWORD dwValue, OUT DWORD &dwPushedOut); 
    VOID PushNNulls(IN DWORD nNulls, OUT DWORD &dwPushedOut); 
    DWORD dwNumberElements(VOID)  { return m_nElements; }; 
    DWORD dwMaxNumberElements(VOID) { return m_maxElements; }; 
    VOID Min(OUT DWORD &); 
    VOID Max(OUT DWORD &); 
    VOID Average(OUT DWORD &); 
 
private: 
    DWORD m_nElements; 
    DWORD m_maxElements; 
    DWORD m_iCurrentElement; 
    DWORD *m_padwFIFOBuffer; 
}; 
 
#endif