REQBK Back to Index page
 
Prolog 
Control Block Contents 
   REQBK 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.


  REQBK Prolog Top of page
 
 NAME       : HCPREQBK
 DESCRIPTION: Request block
 DSECT      : REQBK
 FUNCTION   : This DSECT maps each entry in a list of
              unique requests.
 LOCATED BY : Dependent on the function using this
              generic control block.
 CREATED BY : Dependent on the function using this
              generic control block.
 DELETED BY : Dependent on the function using this
              generic control block.
 SERIALIZED : Request block chain lock defined by the
              function.
 RELOCATION CONSIDERATIONS : None
 COMMENTS   : This control block is defined to be a
              generic control block for functions that
              need to manage requests. For example, it
              can be used to match a request and its
              asynchronous response.
              This block should be used in conjunction
              with the HCPREQST macro, which manages a
              queue of REQBKs.
 
 
  REQBK Control Block Content Top of page
 

 REQBK DSECT Top of page
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure REQBK Request block 0000 0 Address 4 REQNEXT Address of the next REQBK in the list. 0004 4 Signed 4 REQREQID Request ID - a unique token representing this request. 0008 8 Character 48 REQUDATA User-defined data for this request. Length of the block 00000007 REQSIZE (*-REQBK+7)/8 REQBK size in doublewords 00000038 REQBSIZE *-REQBK REQBK size in bytes
 
 
  REQBK Storage Layout Top of page
 
          
*** REQBK - Request block
*
*     +---------------------------+---------------------------+
*   0 |         REQNEXT           |         REQREQID          |
*     +---------------------------+---------------------------+
*   8 |                                                       |
*     =                       REQUDATA                        =
*     |                                                       |
*     +-------------------------------------------------------+
*  38
*
*** REQBK - Request block
 
 
  REQBK Cross Reference Top of page
 
 
Symbol         Dspl Value
-------------- ---- -----
REQBSIZE       0008 00000038
REQNEXT        0000
REQREQID       0004
REQSIZE        0008 00000007
REQUDATA       0008
 
This information is based on z/VM 7.2.0 Last updated on 24 Jun 2020 at 09:30:03 EDT.
Copyright IBM Corporation, 1990, 2020