LCKLF | Back to Index page

| Prolog Control Block Contents LCKLF 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.

LCKLF Prolog | Top of page

     NAME       : HCPLCKLF
     DESCRIPTION: CFLF LOCK TABLE (LCK)
     DSECT      : LCKLF
     FUNCTION   : DESCRIBES A CFLF LOCK TABLE ENTRY USED BY HCPLFP
                  WHEN PROCESSING CFLF ORDERS.
                  THERE IS ONE LOCK TABLE PER CFLF CONFIGURATION.
     LOCATED BY : None
                  CFGLKTBL IN HCPCFGLF
     CREATED BY : HCPLFP
     DELETED BY : HCPLFCST, HCPLFCRL, HCPLFPSF
     SERIALIZED : CFLF CONFIGURATION LOCK
     RELOCATION CONSIDERATIONS : None

LCKLF Control Block Content | Top of page

     LCKLF DSECT
    Top of page

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      LCKLF          CFLF LOCK TABLE (LCK)
    0000    0 Bitstring    2 LCKLSSID       SUBSYSTEM ID
    0002    2 Bitstring    1 LCKLPRT        PARTITION NUMBER
    0003    3 Character    8 LCKLCKN        CFLF LOCK NAME
    000B   11 Bitstring    1 *              RESERVED FOR IBM USE
    000C   12 Bitstring    1 LCKLGLS        GLOBAL LOCK STATE
    000D   13 Bitstring    1 LCKLFLG        FLAGS
              1... ....      LCKLFCS        X'80' LCKLFCS CONTENTION SCAN
                                            COMPLETE
    000E   14 Bitstring    2 *              RESERVED FOR IBM USE
    0010   16 Address      4 LCKLFWT        ADDRESS OF FIRST QUEUED WAITER
    0014   20 Address      4 LCKLLWT        ADDRESS OF LAST QUEUED WAITER
    0018   24 Bitstring    8 LCKLHLD        LOCK HOLDER ENTRY
              00000001       LCKLHLD8       (L'LCKLHLD+7)/8
          THERE IS ONE HOLDER ENTRY IN THE LOCK TABLE ENTRY ITSELF.
          MORE HOLDERS MAY BE CHAINED IN FREE STORAGE BLOCKS USING
          THE SAME FIELD FORMAT.
    0018   24 Bitstring    1 LCKLHID        ID OF HOLDER
    0019   25 Bitstring    1 LCKLHFG        HOLDER FLAGS
              1... ....      LCKLHC         X'80' LCKLHC CONTENTION OPTION
                                            REQUESTED
    001A   26 Bitstring    1 *              RESERVED FOR IBM USE
    001B   27 Bitstring    1 LCKLHLS        HOLDER LOCK STATE
    001C   28 Address      4 LCKLHPT        NEXT HOLDER POINTER
    0020   32 Bitstring    8 LCKLWTR        LOCK WAITER ENTRY
              00000001       LCKLWTR8       (L'LCKLWTR+7)/8
          THERE IS ONE WAITER ENTRY IN THE LOCK TABLE ENTRY ITSELF.
          MORE WAITERS MAY BE CHAINED IN FREE STORAGE BLOCKS USING
          THE SAME FIELD FORMAT.
    0020   32 Bitstring    1 LCKLWID        ID OF WAITER
    0021   33 Bitstring    1 LCKLWFG        WAITER FLAGS
    0022   34 Bitstring    1 LCKLMSK        LOCK MASK
    0023   35 Bitstring    1 LCKLRLS        REQUESTED LOCK STATE
    0024   36 Address      4 LCKLWPT        NEXT WAITER POINTER
              00000028       LCKLSIZ        *-LCKLF SIZE IN BYTES
              00000005       LCKSIZ8        (*-LCKLF+7)/8 SIZE IN DOUBLEWORDS
          LOCK FRAME CONTROL INFORMATION FOLLOWS
              00000064       LCKPFRM        (*-LCKLF)/LCKLSIZ MAXIMUM LOCKS
                                            PER FRAME
    0FB8 4024 Address      4 LCKFPTR        POINTER TO NEXT LOCK FRAME
    0FBC 4028 Address      4 LCKBPTR        POINTER TO PREVIOUS LOCK FRAME
    0FC0 4032 Signed       4 LCKWRKSV (16)  SAVEAREA FOR LOCK PROCESSING
              00000048       LCKSUFIX       *-LCKFPTR SIZE OF LOCK TABLE
                                            SUFFIX

LCKLF Storage Layout | Top of page

    *** LCKLF - CFLF LOCK TABLE (LCK)
    *
    *     +-------------+------+----------------------------------+
    *   0 |  LCKLSSID   |:LPRT |            LCKLCKN-              |
    *     +-------------+------+------+------+------+-------------+
    *   8 |      -(003)        |//////|:LGLS |:LFLG |/////////////|
    *     +--------------------+------+------+------+-------------+
    *  10 |         LCKLFWT           |         LCKLLWT           |
    *     +---------------------------+---------------------------+
    *  18 |                       LCKLHLD                         |
    *     +-------------------------------------------------------+
    *  20 |///////////////////////////////////////////////////////|
    *     =///////////////////////////////////////////////////////=
    *     |///////////////////////////////////////////////////////|
    *     +---------------------------+---------------------------+
    * FB8 |         LCKFPTR           |         LCKBPTR           |
    *     +---------------------------+---------------------------+
    * FC0 |                                                       |
    *     =                       LCKWRKSV                        =
    *     |                                                       |
    *     +-------------------------------------------------------+
    *1000
    *
    *** LCKLF - CFLF LOCK TABLE (LCK)

    *** Overlay for LCKLHLD in LCKLF
    *
    *     +------+------+------+------+---------------------------+
    *  18 |:LHID |:LHFG |//////|:LHLS |         LCKLHPT           |
    *     +------+------+------+------+---------------------------+
    *  20 |                       LCKLWTR                         |
    *     +-------------------------------------------------------+
    *  28
    *
    *** Overlay for LCKLHLD in LCKLF

    *** Overlay for LCKLWTR in LCKLF
    *
    *     +------+------+------+------+---------------------------+
    *  20 |:LWID |:LWFG |:LMSK |:LRLS |         LCKLWPT           |
    *     +------+------+------+------+---------------------------+
    *  28
    *
    *** Overlay for LCKLWTR in LCKLF

LCKLF Cross Reference | Top of page

    Symbol         Dspl Value
    -------------- ---- -----
    LCKBPTR        0FBC
    LCKFPTR        0FB8
    LCKLCKN        0003
    LCKLFCS        000D 80
    LCKLFLG        000D
    LCKLFWT        0010
    LCKLGLS        000C
    LCKLHC         0019 80
    LCKLHFG        0019
    LCKLHID        0018
    LCKLHLD        0018
    LCKLHLD8       0018 00000001
    LCKLHLS        001B
    LCKLHPT        001C
    LCKLLWT        0014
    LCKLMSK        0022
    LCKLPRT        0002
    LCKLRLS        0023
    LCKLSIZ        0024 00000028
    LCKLSSID       0000
    LCKLWFG        0021
    LCKLWID        0020
    LCKLWPT        0024
    LCKLWTR        0020
    LCKLWTR8       0020 00000001
    LCKPFRM        0024 00000064
    LCKSIZ8        0024 00000005
    LCKSUFIX       0FC0 00000048
    LCKWRKSV       0FC0

This information is based on z/VM 7.2.0 Last updated on 24 Jun 2020 at 09:28:49 EDT.
Copyright IBM Corporation, 1990, 2020