Reference Guide

ZCOM Tables and Data Structures
Data Buffer Pool
Chapter 3 109
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