LOCKTAB | Back to Index page

| Prolog Control Block Contents LOCKTAB 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.

LOCKTAB Prolog | Top of page

     NAME       : LOCKTAB
     DESCRIPTION: Lock/Unlock Resource Table
     DSECT      : LOCKTAB
     FUNCTION   : LOCKTAB simulates the VSE
                  Lock/Unlock resource table. LOCKTAB is called
                  by the LOCKTAB macro.

LOCKTAB Control Block Content | Top of page

     LOCKTAB DSECT
    Top of page

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      LOCKTAB        Lock/Unlock Resource Table
    0000    0 Bitstring    2 LOKBDY         ENTRY FOR LOCKTAB SPACE
    0002    2 Bitstring    2 LOKOE          ENTRY FOR OWNER ELEMENTS
              00000004       ALOKTABA       * START OF LOCK TABLE
    0004    4 Signed       4 * (120)        480 BYTE LOCK TABLE
              000001E4       ALOKTABE       * END OF LOCK TABLE
    01E4  484 Bitstring    4 ALOKTABS       SIZE OF LOCK TABLE
    01E8  488 Bitstring    4 LASTUSED       HIGH WATER MARK

LOCKTAB Storage Layout | Top of page

    *** LOCKTAB - Lock/Unlock Resource Table
    *
    *     +-------------+-------------+---------------------------+
    *   0 |   LOKBDY    |   LOKOE     |///////////////////////////|
    *     +-------------+-------------+///////////////////////////|
    *   8 |///////////////////////////////////////////////////////|
    *     =///////////////////////////////////////////////////////=
    *     |///////////////////////////+---------------------------+
    * 1E0 |///////////////////////////|         ALOKTABS          |
    *     +---------------------------+---------------------------+
    * 1E8 |         LASTUSED          | 1EC
    *     +---------------------------+
    *
    *** LOCKTAB - Lock/Unlock Resource Table

LOCKTAB Cross Reference | Top of page

    Symbol         Dspl Value
    -------------- ---- -----
    ALOKTABA       0002 00000004
    ALOKTABE       0004 000001E4
    ALOKTABS       01E4
    LASTUSED       01E8
    LOKBDY         0000
    LOKOE          0002

This information is based on z/VM 7.2.0 Last updated on 24 Jun 2020 at 09:36:29 EDT.
Copyright IBM Corporation, 1990, 2020