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

#### CKP_HDR

Prolog

Control Block Contents
CKP_HDR DSECT

Storage Layout

Cross Reference (Contains links to field and bit definitions)

#### CKP_HDR Prolog

     NAME       : STRUCPRA
     DSECT      : CKP_HDR
     DESCRIPTION: Checkpoint data header

#### CKP_HDR Control Block Content

#### CKP_HDR DSECT

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      CKP_HDR        Checkpoint data header
    0000    0 Signed       4 * (0)
    0000    0 Signed       4 CKP_SUSPCNT    Suspended count
    0004    4 Signed       4 CKP_BLKCNT     Blocked count
    0008    8 Signed       4 CKP_FLAG (0)   Flags
    0008    8 Bitstring    1 CKP_FLAG0
              1... ....      CKP_FLAG_SUSPRD
                                            X'80' CKP_FLAG_SUSPRD suspend
                                            data read
              .1.. ....      CKP_FLAG_BLKRD X'40' CKP_FLAG_BLKRD block data
                                            read
    0009    9 Bitstring    1 CKP_FLAG1      Reserved
    000A   10 Bitstring    1 CKP_FLAG2      Reserved
    000B   11 Bitstring    1 CKP_FLAG3      Reserved
              Suspended checkpoint data entry

#### CKP_HDR Storage Layout

    *** CKP_HDR - Checkpoint data header
    *
    *     +---------------------------+---------------------------+
    *   0 |       CKP_SUSPCNT         |        CKP_BLKCNT         |
    *     +------+------+------+------+---------------------------+
    *   8 |(008) |(009) |(00A) |(00B) | C
    *     +------+------+------+------+
    *
    *** CKP_HDR - Checkpoint data header

#### CKP_HDR Cross Reference

    Symbol         Dspl Value
    -------------- ---- -----
    CKP_BLKCNT     0004
    CKP_FLAG       0008
    CKP_FLAG_BLKRD
                   0008 40
    CKP_FLAG_SUSPRD
                   0008 80
    CKP_FLAG0      0008
    CKP_FLAG1      0009
    CKP_FLAG2      000A
    CKP_FLAG3      000B
    CKP_SUSPCNT    0000

This information is based on z/VM V6R1.0.
Last updated on 23 Oct 2009 at 11:03:28 EDT.
Copyright IBM Corporation, 1990, 2008