HP UX 11i v1 I/O Cards manual Free Buffer Header Structure zfbhtype

ZCOM Tables and Data Structures

Data Buffer Pool

	Free Buffer Header Structure (zfbh_type)
	The buffer header contains information about the buffer as well as a
	linkage to the next buffer. (zbhd_type). See Table 3-30 and Table 3-31.
Table 3-30	Free Buffer Header Structure (zfbh_type)
Field Name	Field Description	Field Type		Size
				(Bytes)
BFFLAG	System flags (length & status)	uns.int		4
SPARE1	Reserved, not used	int		4
QHEAD	Pointer to next buffer on queue	pointer		8
BFPREV	Pointer to previous buffer on queue	pointer		8
Table 3-31	Buffer Structure (zbhd_type)
Field Name	Field Description		Field Type	Size
				(Bytes)
BFFLAG	System flags (length & status)		uns.int	4
BFLEN	Buffer length in bytes (data portion)		int	4
BFLINK	Pointer to next buffer on queue		pointer	8
BFDATA	Pointer to 1st byte of data in buffer		pointer	8
BFRESP	Pointer to response record		pointer	8

104 Chapter 3