rng.hpp

一个嵌入式系统的C代码

//***********************************************************************
//  MODULE : Rng - Circular queue (ring buffer) Class Header            *
//  AUTHOR : Ron Chernich                                               *
//  PURPOSE: Ring buffer service class for the RCOS system              *
//  HISTORY:                                                            *
//   18-JAN-93  First (MSC/C++ 7.00) version                            *
//   11-APR-93  Flusher member added					*
//***********************************************************************

#ifndef _RCOS_RNG
  #define _RCOS_RNG

  #include <stdio.h>
  #include <memory.h>

  #include "rcos.hpp"


  /////////////////////
  // A simple character ring buffer class
  //
  class Rng {
    char *buf;
    unsigned short head, tail, size;
  public:
    Rng(UINT16 = 16);
    ~Rng();
    void RngPut (char); 	    // Add a char to the buffer
    char RngGet (void); 	    // Get next char from the buffer
    BOOL RngStat (void);	    // indicate state of buffer
    inline void RngFlush (void)	    // inline function flushes contents
      { head = tail; }
  };

#endif

//************************************ EOF ******************************