Programming Interface Information: This information is NOT intended to be used as Programming Interfaces of z/VM.

#### SDBBK

Prolog

Control Block Contents
SDBBK DSECT
SDBLSENT DSECT

Storage Layout

Cross Reference (Contains links to field and bit definitions)

#### SDBBK Prolog

     NAME       : HCPSDBBK
     DESCRIPTION: ISFC Send Data Buffer block
     DSECT      : SDBBK
     FUNCTION   : Maintain information about an ISFC send data
                  buffer for bunched send support on APPC/VM.
     LOCATED BY : HCPCMS    points to the mailbox entries.
     CREATED BY : HCPCMS    part of the resident data.
     DELETED BY : Does not apply (data contained within a module).
     SERIALIZED : The ISFC global lock (HCPBDSGL).

#### SDBBK Control Block Content

#### SDBBK DSECT

####

####

####

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      SDBBK          ISFC Send Data Buffer block
          SDBBK management.
    0000    0 Signed       4 SDBMDEQ        BUNCHED SENDDATA MDE QUEUE
    0004    4 Signed       4 * (3)          Reserved
              00000010       SDBHDRSZ       *-SDBBK LENGTH OF HEADER IN SDBBK
    0010   16 Dbl-Word     8 * (0)          ENSURE DOUBLE WORD ALIGNMENT
              00000010       SDBBFLST       * VARIABLE LENGTH BUFFER LIST OF
                                            ADDRESSES AND DATA LENGTHS

    SDBLSENT DSECT

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      SDBLSENT       ISFC Send Data Buffer block
          SDBLSENT management.
    0000    0 Signed       4 SDBLSADD       REAL ADDRESS OF LIST ENTRY
    0004    4 Signed       4 SDBLSLEN       LENGTH OF LIST ENTRY
              00000008       SDBLSIZE       *-SDBLSENT SIZE OF ENTRY IN
                                            BUFFER LIST

    SDBBK Storage Layout

    *** SDBBK - ISFC Send Data Buffer block
    *
    *     +---------------------------+---------------------------+
    *   0 |         SDBMDEQ           |///////////////////////////|
    *     +---------------------------+///////////////////////////|
    *     |///////////////////////////////////////////////////////|
    *     +-------------------------------------------------------+
    *  10
    *
    *** SDBBK - ISFC Send Data Buffer block

    *** SDBLSENT - ISFC Send Data Buffer block
    *
    *     +---------------------------+---------------------------+
    *   0 |         SDBLSADD          |         SDBLSLEN          |
    *     +---------------------------+---------------------------+
    *   8
    *
    *** SDBLSENT - ISFC Send Data Buffer block

    SDBBK Cross Reference

    Symbol         Dspl Value
    -------------- ---- -----
    SDBBFLST       0010 00000010
    SDBHDRSZ       0004 00000010
    SDBLSADD       0000
    SDBLSIZE       0004 00000008
    SDBLSLEN       0004
    SDBMDEQ        0000

    This information is
    based on z/VM V6R1.0.
    Last updated on 18 Feb 2010 at 09:03:29 EDT.

    Copyright IBM Corporation, 1990, 2008