typedef struct dx_iott DX_IOTT;/*
* DX_IOTT: I/O Transfer Table structure
*/
struct dx_iott {
unsigned short io_type; /* Transfer type */
unsigned short rfu; /* reserved */
int io_fhandle; /* File descriptor */
char *io_bufp; /* Pointer to base memory */
unsigned long io_offset; /* File/Buffer offset */
long int io_length; /* Length of data */
DX_IOTT *io_nextp; /* Pointer to next DX_IOTT if IO_LINK */
DX_IOTT *io_prevp; /* (optional) Pointer to previous DX_IOTT */
};
代码如上,主要使最后两个指针,是指向自身结构的,请各位高手指点一下,谢谢!!
* DX_IOTT: I/O Transfer Table structure
*/
struct dx_iott {
unsigned short io_type; /* Transfer type */
unsigned short rfu; /* reserved */
int io_fhandle; /* File descriptor */
char *io_bufp; /* Pointer to base memory */
unsigned long io_offset; /* File/Buffer offset */
long int io_length; /* Length of data */
DX_IOTT *io_nextp; /* Pointer to next DX_IOTT if IO_LINK */
DX_IOTT *io_prevp; /* (optional) Pointer to previous DX_IOTT */
};
代码如上,主要使最后两个指针,是指向自身结构的,请各位高手指点一下,谢谢!!
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PR = ^R;
谢谢!!
Pdx_iott=^dx_iott
Tdx_iott=Record
io_type:word; /* Transfer type */
rfu:word; /* reserved */
io_fhandle:Integer; /* File descriptor */
io_bufp:Pchar; /* Pointer to base memory */
io_offset:Cardinal; /* File/Buffer offset */
io_length:integer; /* Length of data */
io_nextp:Pdx_iott; /* Pointer to next DX_IOTT if IO_LINK */
io_prevp:Pdx_iott; /* (optional) Pointer to previous DX_IOTT */
end;