ACC Programmer's Reference Guide

Chapter 4 267
ZCOM C I/F Library Routines
ZQSZE (3X)
PARAMETERS
RETURN VALUE Routine zqsze returns 0 if successful. Otherwise, a non-zero error code
is returned. See /opt/acc/include/zcom/zcomsys.h for the list of ZCOM
error codes and their meanings.
zap ZCOM address
zqhdp (Return param)
ZCOM queue header data structure. This structure has the following
definition:
typedef struct {
uint32 qnmsg; /* Number of msgs on queue */
uint32 qlimit; /* Max # of msgs allowed on queue */
zbhd_type
*qhead;
/* Pointer to 1st msg on queue */
zbhd_type *qtail; /* Pointer to last msg on queue */
uint32 qmmax; /* Historical max # of msgs on queue */
uint32 qtmsg; /* Total # of msgs through queue */
uint32 qbytes; /* Number of bytes on queue */
uint16 qwaiter; /* Number of waiters on this queue */
uint16 qflag; /* Queue flags */
uint32 qfdata; /* Queue function data */
uint32 spare1; /* Reserved, not used */
void
(*qfunc)();
/* Queue function to call */
} zqhd_type;
Note that in 32-bit mode, 32-bit padding fields are inserted before the
pointer fields. These are to maintain the same layout in both 32/64-bit
modes. Such padding fields are not shown here and also should not be
referenced directly.