dbllist.hpp

一个嵌入式系统的C代码

//***********************************************************************
//  MODULE : DblList - Class definition 				*
//  AUTHOR : Ron Chernich						*
//  PURPOSE: Maintains Double linked Lists with pointer to data.	*
//  HISTORY:								*
//   10-JAN-93	First (MSC/C++ 7.00) version				*
//***********************************************************************

#include <stdio.h>
#include <stdlib.h>
#include <string.h> 

#include "rcos.hpp"

#ifndef DBLLIST

  #define ASCENDING   1
  #define DESCENDING -1

  typedef struct dbltag {
    struct   dbltag *prev;
    struct   dbltag *next;
    unsigned nBytes;
    void     *data;
  } DBLT, *PDBLT;

  class DblList {
    INT16 order;
    PDBLT pBase;
    PDBLT pCrnt;
    PDBLT pTemp;
    PDBLT create (void*, UINT16);
  public:
    DblList (INT16 = ASCENDING);
    ~DblList (void);
    void DblDelete (void);		// dispose of <crnt> data object
    void DblDrop (void);		// purge entire list contents
    void *DblGetHead (void); 		// return ptr to first data object
    void *DblGetTail (void); 		// return ptr to last data object
    void *DblGetNext (void); 		// return ptr to next, or NULL
    void *DblGetPrev (void); 		// return ptr to previous, or NULL
    void *DblAppend (void*, UINT16);	// add passed object at end
    void *DblInsert (void*, UINT16);	// add passed obj in priority order
  };


  #define DBLLIST
#endif

//--------------------------------- EOF ------------------------------------