EVNBK | Back to Index page

| Prolog Control Block Contents EVNBK 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.

EVNBK Prolog | Top of page

     NAME       : HCPEVNBK
     DESCRIPTION: C System Services Event block
     DSECT      : EVNBK
     FUNCTION   : C System Services Event block used to describe a
                  Event used by platform specific C Services
     LOCATED BY : Passed as argument on eventWait and eventNotify
                  services
     CREATED BY : allocateEvent service
     DELETED BY : deallocateEvent service
     SERIALIZED : A latch or lock is held (EVNLATLK) before
                  this control block is updated.
     RELOCATION CONSIDERATIONS : None
     NOTES      :

EVNBK Control Block Content | Top of page

     EVNBK DSECT
    Top of page

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      EVNBK          C System Services Event block
    0000    0 Address      4 EVNLATLK       Pointer to latch or lock -
                                            HCPLATBK or HCPLOCBK (for debug
                                            only)
    0004    4 Address      4 EVNQUEUE       Pointer to chain of deferred
                                            CPEBKs
    0008    8 Signed       8 EVNNTTOD       Timestamp when event last
                                            notified (for debug)
    0010   16 Address      8 EVNNTFNH       fnhdr pointer for last function
                                            which called notifyEvent (for
                                            debug only)
              00000018       EVNBSIZE       *-EVNBK size in bytes
              00000003       EVNSIZE        (*-EVNBK+7)/8 size in double
                                            words

EVNBK Storage Layout | Top of page

    *** EVNBK - C System Services Event block
    *
    *     +---------------------------+---------------------------+
    *   0 |         EVNLATLK          |         EVNQUEUE          |
    *     +---------------------------+---------------------------+
    *   8 |                       EVNNTTOD                        |
    *     +-------------------------------------------------------+
    *  10 |                       EVNNTFNH                        |
    *     +-------------------------------------------------------+
    *  18
    *
    *** EVNBK - C System Services Event block

EVNBK Cross Reference | Top of page

    Symbol         Dspl Value
    -------------- ---- -----
    EVNBSIZE       0010 00000018
    EVNLATLK       0000
    EVNNTFNH       0010
    EVNNTTOD       0008
    EVNQUEUE       0004
    EVNSIZE        0010 00000003

This information is based on z/VM 7.2.0 Last updated on 24 Jun 2020 at 09:28:07 EDT.
Copyright IBM Corporation, 1990, 2020