ACC Programmer's Reference Guide

52 Chapter3
ZCOM Tables and Data Structures
ZCOM Header Structure
HLTSTB - Storage label table
The storage label entry indicates the ownership of an application d ata
storage area in the logical terminal table extension area. Each entry is a
structure of 16 bytes (zslb_type), as shown in Table 3-3.
The table is initialized by TTGEN from the Logical-Data statements in
the TTGEN configuration file. There is one entry in the Storage label
table for each Logical-Data statement. Additional entries can be added to
this table by calling the zltqueue() routine (up to a maximum of 20
storage labels).
DSC_ercvrs - Dynamic Reconfiguration SystemEvent Receivers pointer
(zshaddr_type *)
This field contains a pointer to a linked list of all applications that wish
to be notified whenever a ZCOM subsystem dynamic reconfiguration
system event message is generated (through the zconfig routine). This
field is initialized by TTGEN to zero. It will only contain a value if at
least one application has requested notification.
Table 3-3 Storage Label Table
Field Name Field Description Field Type Size
(Bytes)
SLBGRP Appl. grp. number (0 = globally assigned) uns.short 2
SLBNAM Storage label name char 8
SLBSZE Size of the application data in bytes uns.short 2
SLBOFF Offset from the start of the LTT to the application data
in the extension area. Therefore, this value is the size
of the LTT plus the offset of the application data from
the start of the LTT extension area.
short 2
SLBRSV <reserved>, unused char 2