Programming Interface Information: This information is NOT intended to be
used as Programming Interfaces of VM/ESA. It is to be used for diagnosis only.

BLEBK

Prolog  

Control Block Contents  

BLEBK DSECT

BLEHD DSECT

BLEFM DSECT

Storage Layout  

Cross Reference (Contains links to field and bit definitions)  

BLEBK Prolog

 NAME       : HCPBLEBK
 DESCRIPTION: CP application interface table ctl block
 STATUS     : VM/ESA Version 2, Release 3.0
 DSECT      : BLEBK
 FUNCTION   : Maintain a table of shared control blocks, and service
              handles.
 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 : BLELKWRD lock. This lock would only be
              destroyed if ISFC is not active.
              Serialization handled by the functions
              that manipulate the table.
 NOTES      :
              The BLEHD table header can be allocated or pre-defined.
              If allocated, it must have been allocated prior to invoking
              any of the utilities that manipulate the BLEBK tables.
              The BLEFM and BLEBK tables are dynamically allocated by
              the BLEBK utilities.
              This is a general 2-step table for any type of
              control block.
     BLEHD
    +---------------+
    | BLELKWRD      |
    |---------------|
    | BLETPTR       |
    | BLEFM table ----+
    |---------------| |
    | BLEHI         | |
    |---------------| |
    |               | |
    |               | |
    +---------------+ |
                      |     +---------+
                      |     |         |
                      V     |         V
        +---------------+   |        +----------+
        | BLEFM         |   |        | BLEBK  ------> control
        | BLEBK table ------+        |----------|     block @
        |---------------|            | BLEBK  ----+
        | BLEFM         |            |----------| |
        | BLEBK table ------+        |  .       | +-> control
        +---------------+   |        |  .       |     block @
                            |        |  .       |
                            |        +----------+
                            +---------+
                                      V
                                     +----------+
                                     | BLEBK  ------> control
                                     |----------|     block @
                                     | BLEBK  ----+
                                     |----------| |
                                     |  .       | +-> control
                                     |  .       |     block @
                                     |  .       |
                                     +----------+

 

BLEBK Control Block Content


BLEBK DSECT

Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure BLEBK CP application interface table ctl block BLEBK Table entry 0000 0 Signed 4 BLETOK Token value 0004 4 Address 4 BLEPTR Target block address 00000001 BLESIZE (*-BLEBK+7)/8 Size, in doublewords, of BLEBK 00000008 BLEHNDTL 8 Number of bits in a handle used to hold the instance BLEHD table header

BLEHD DSECT

Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure BLEHD CP application interface table ctl block Interface table lock controls. 0000 0 Dbl-Word 8 BLELKWRD (3) Table lock 0018 24 Bitstring 8 BLELKTRC Table lock trace values Table pointers 0020 32 Address 4 BLETPTR Table address 0024 36 Address 4 BLETEND Points past the end of the table 0028 40 Signed 4 BLEHI Highest valid token Binary tree controls 002C 44 Address 4 BLETREE BLEBK tree root 0030 48 Signed 2 BLECMP (3) Compare instruction used to locate a control block in binary tree 0036 54 Signed 2 BLEDTOFF Child pointer offset 0038 56 Signed 2 BLETKOFF Token offset (for REGBK type) Control block type. 003A 58 Signed 2 BLETYPE Type of control block in table 00000008 BLEHSIZE (*-BLEHD+7)/8 Size, in doublewords, of BLEHD BLEFM frame descriptor format

BLEFM DSECT

Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure BLEFM CP application interface table ctl block BLEFM Table entry 0000 0 Address 4 BLEEPTR Table start address 0004 4 Address 4 BLEFRE Table free chain 0008 8 Address 4 BLEUNA First unassigned table address 000C 12 Address 4 BLETOP One byte past top of table 00000002 BLEFSIZE (*-BLEFM+7)/8 Size, in doublewords, of BLEFM 0000000C BLEFRMEL 12 Number of bits in a handle used to find the BLEFM

 

BLEBK Storage Layout

*** BLEBK - CP application interface table ctl block
*
*     +---------------------------+---------------------------+
*   0 |          BLETOK           |          BLEPTR           |
*     +---------------------------+---------------------------+
*   8
*
*** BLEBK - CP application interface table ctl block
*** BLEHD - CP application interface table ctl block
*
*     +-------------------------------------------------------+
*   0 |                                                       |
*     =                       BLELKWRD                        =
*     |                                                       |
*     +-------------------------------------------------------+
*  18 |                       BLELKTRC                        |
*     +---------------------------+---------------------------+
*  20 |         BLETPTR           |         BLETEND           |
*     +---------------------------+---------------------------+
*  28 |          BLEHI            |         BLETREE           |
*     +---------------------------+-------------+-------------+
*  30 |                 BLECMP                  |  BLEDTOFF   |
*     +-------------+-------------+-------------+-------------+
*  38 |  BLETKOFF   |  BLETYPE    | 3C
*     +-------------+-------------+
*
*** BLEHD - CP application interface table ctl block
*** BLEFM - CP application interface table ctl block
*
*     +---------------------------+---------------------------+
*   0 |         BLEEPTR           |          BLEFRE           |
*     +---------------------------+---------------------------+
*   8 |          BLEUNA           |          BLETOP           |
*     +---------------------------+---------------------------+
*  10
*
*** BLEFM - CP application interface table ctl block

 

BLEBK Cross Reference

(contains links to field and bit definitions)
Symbol         Dspl Value
-------------- ---- -----

BLECMP 0030

BLEDTOFF 0036

BLEEPTR 0000

BLEFRE 0004

BLEFRMEL 000C 0000000C

BLEFSIZE 000C 00000002

BLEHI 0028

BLEHNDTL 0004 00000008

BLEHSIZE 003A 00000008

BLELKTRC 0018

BLELKWRD 0000

BLEPTR 0004

BLESIZE 0004 00000001

BLETEND 0024

BLETKOFF 0038

BLETOK 0000

BLETOP 000C

BLETPTR 0020

BLETREE 002C

BLETYPE 003A

BLEUNA 0008


This information is based on VM/ESA 2.4.0.
Last updated on 3 Aug 1999 at 11:42:12 EDT.
Copyright IBM Corporation, 1990, 1999