OPNBK | Back to Index page

| Prolog Control Block Contents OPNBK 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.

OPNBK Prolog | Top of page

     NAME       : HCPOPNBK
     DESCRIPTION: ISFC CP Application open control block
     DSECT      : OPNBK
     FUNCTION   : Each OPNBK holds information exchanged between CP application
                  mailboxes when establishing a conversation.
     LOCATED BY :
     CREATED BY : CP application mailbox on an OPEN function.
     DELETED BY : CP application mailbox when releasing an OPEN_C message.
     SERIALIZED : The ACTBK lock.
     RELOCATION CONSIDERATIONS : None
     NOTES      :
                  An OPNBK contains information from one CP Application
                  mailbox to a partner mailbox when a conversation is
                  being established.
                  It is used by the CP Application mailbox on OPEN and
                  OPEN_C messages.

OPNBK Control Block Content | Top of page

     OPNBK DSECT
    Top of page

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      OPNBK          ISFC CP Application open control block
    0000    0 Character    8 OPNAPPLT       Target CP application name
    0008    8 Character    8 OPNNODET       Target node name
    0010   16 Character    8 OPNAPPLS       Source CP application name
    0018   24 Character    8 OPNNODES       Source node name
              00000004       OPNSIZE        (*-OPNBK+7)/8 Size, in
                                            doublewords, of OPNBK

OPNBK Storage Layout | Top of page

    *** OPNBK - ISFC CP Application open control block
    *
    *     +-------------------------------------------------------+
    *   0 |                       OPNAPPLT                        |
    *     +-------------------------------------------------------+
    *   8 |                       OPNNODET                        |
    *     +-------------------------------------------------------+
    *  10 |                       OPNAPPLS                        |
    *     +-------------------------------------------------------+
    *  18 |                       OPNNODES                        |
    *     +-------------------------------------------------------+
    *  20
    *
    *** OPNBK - ISFC CP Application open control block

OPNBK Cross Reference | Top of page

    Symbol         Dspl Value
    -------------- ---- -----
    OPNAPPLS       0010
    OPNAPPLT       0000
    OPNNODES       0018
    OPNNODET       0008
    OPNSIZE        0018 00000004

This information is based on z/VM 7.2.0 Last updated on 24 Jun 2020 at 09:29:28 EDT.
Copyright IBM Corporation, 1990, 2020