RQHDR - 32-bit CP - V4R4.0

Programming Interface Information: This information is NOT intended to be used as Programming Interfaces of z/VM.

#### RQHDR

Prolog

Control Block Contents
RQHDR DSECT

Storage Layout

Cross Reference (Contains links to field and bit definitions)

#### RQHDR Prolog

     NAME       : HCPRQHDR
     DESCRIPTION: SAVBK Return Queue Header Block
     DSECT      : RQHDR
     FUNCTION   : provide queue anchor for SAVBK's returned by
                  SAVBK management functions
     LOCATED BY : SAVECPRQ in SAVBK
                  PFXCPRQA in PFXPG
                  SSACPRQ  in SSABK
                  RCCSRCQ  in RCCBK
     CREATED BY : not created, part of SSABK and HCPRCC
     DELETED BY : not deleted
     SERIALIZED : compare double and swap logic

#### RQHDR Control Block Content

#### RQHDR DSECT

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      RQHDR          SAVBK Return Queue Header Block
    0000    0 Signed       4 RQHCOUNT       Count of SAVBK's on queue
    0004    4 Address      4 RQHQUEUE       Queue of SAVBK's
              00000001       RQHSIZE        (*-RQHDR+7)/8 Size of RQHDR in
                                            dwords
              00000008       RQHLEN         (*-RQHDR) Length of RQHDR

#### RQHDR Storage Layout

    *** RQHDR - SAVBK Return Queue Header Block
    *
    *     +---------------------------+---------------------------+
    *   0 |         RQHCOUNT          |         RQHQUEUE          |
    *     +---------------------------+---------------------------+
    *   8
    *
    *** RQHDR - SAVBK Return Queue Header Block

#### RQHDR Cross Reference

    Symbol         Dspl Value
    -------------- ---- -----
    RQHCOUNT       0000
    RQHLEN         0004 00000008
    RQHQUEUE       0004
    RQHSIZE        0004 00000001

This information is based on z/VM V4R4.0. Last updated on 29 Jul 2003 at 16:10:06 EDT.
Copyright IBM Corporation, 1990, 2003