HDRBK Back to Index page
 
Prolog 
Control Block Contents 
   HDRBK DSECT
Storage Layout 
Cross Reference (Contains links to field and bit definitions)
Programming Interface Information:
This information is NOT intended to be
used as Programming Interfaces of z/VM.


  HDRBK Prolog Top of page
  
 NAME       : DMSHDRBK
 DESCRIPTION: Free storage element header
 DSECT      : HDRBK
 FUNCTION   : Mapping macro which maps unallocated
              pieces of storage within a page.
 
 
  HDRBK Control Block Content Top of page
  




 HDRBK DSECT
Top of page


Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      HDRBK          Free storage element header
0000    0 Signed       4 HDRFORWD       Pointer to next piece of free
                                        storage
0004    4 Signed       4 HDRLEN         Size of this piece of free
                                        storage
 
 
  HDRBK Storage Layout Top of page
  
          
*** HDRBK - Free storage element header
*
*     +---------------------------+---------------------------+
*   0 |         HDRFORWD          |          HDRLEN           |
*     +---------------------------+---------------------------+
*   8
*
*** HDRBK - Free storage element header
 
 
  HDRBK Cross Reference Top of page
  
 
Symbol         Dspl Value
-------------- ---- -----
HDRFORWD       0000
HDRLEN         0004
 
This information is based on z/VM 7.4.0 Last updated on 24 Jun 2024 at 11:37:52 EDT.
Copyright IBM Corporation, 1990, 2024