VMS Help System Services, $END TRANS  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Ends a transaction by attempting to commit it, and returns the
    outcome of the transaction.

    Format

      SYS$END_TRANS  [efn] ,[flags] ,iosb [,[astadr] ,[astprm]

                     ,[tid]]

    C Prototype

      int sys$end_trans  (unsigned int efn, unsigned int flags,

                         struct _iosb *iosb,...);

    Arguments

 efn

    OpenVMS usage:ef_number
    type:         longword (unsigned)
    access:       read only
    mechanism:    by value
    Number of the event flag that is set when the service completes.
    If this argument is omitted, event flag 0 is set.

 flags

    OpenVMS usage:mask_longword
    type:         longword (unsigned)
    access:       read only
    mechanism:    by value
    Flags specifying options for the service. The flags argument is
    a longword bit mask in which each bit corresponds to an option
    flag. The $DDTMDEF macro defines symbolic names for these option
    flags.

    All undefined bits must be 0. If this argument is omitted, no
    flag is set.

    The flag currently defined is shown in the following table:

    Flag           Description

    DDTM$M_SYNC    Set this flag to specify that successful
                   synchronous completion is to be indicated by
                   returning SS$_SYNCH. When SS$_SYNCH is returned,
                   the asynchronous system trap (AST) routine is not
                   called, the event flag is not set, and the I/O
                   status block is not filled in.

 iosb

    OpenVMS usage:io_status_block
    type:         quadword (unsigned)
    access:       write only
    mechanism:    by reference
    I/O status block in which the following information is returned:

    o  The completion status of the service. This is returned as a
       condition value.

    o  The outcome of the transaction.

       If the service returns SS$_NORMAL, the outcome of the
       transaction is commit. If the service returns SS$_ABORT, the
       outcome of the transaction is abort.

    o  An abort reason code that gives one reason why the transaction
       aborted, if the completion status of the service is SS$_ABORT.

    The $DDTMMSGDEF macro defines symbolic names for these abort
    reason codes; those currently defined are shown in the following
    table:

    Symbolic Name        Description

    DDTM$_ABORTED        The application aborted the transaction.
    DDTM$_COMM_FAIL      A communications link failed.
    DDTM$_INTEGRITY      A resource manager integrity constraint
                         check failed.
    DDTM$_LOG_FAIL       A write operation to the transaction log
                         failed.
    DDTM$_PART_SERIAL    A resource manager serialization check
                         failed.
    DDTM$_PART_TIMEOUT   The timeout specified by a resource manager
                         expired.
    DDTM$_SEG_FAIL       A process or image terminated.
    DDTM$_               A DECdtm transaction manager serialization
    SERIALIZATION        check failed.
    DDTM$_SYNC_FAIL      The transaction was not globally
                         synchronized.
    DDTM$_TIMEOUT        The timeout specified on $START_TRANS
                         expired.
    DDTM$_UNKNOWN        The reason is unknown.
    DDTM$_VETOED         A resource manager was unable to commit the
                         transaction.

    Refer to the OpenVMS System Services Reference Manual to view the
    structure of the I/O status block.

 astadr

    OpenVMS usage:ast_procedure
    type:         procedure value
    access:       call without stack unwinding
    mechanism:    by reference
    AST routine that is executed when the service completes. The
    astadr argument is the address of this routine. The routine is
    executed in the access mode of the caller.

 astprm

    OpenVMS usage:user_arg
    type:         longword (unsigned)
    access:       read only
    mechanism:    by value
    AST parameter that is passed to the AST routine specified by the
    astadr argument.

 tid

    OpenVMS usage:transaction_id
    type:         octaword (unsigned)
    access:       read only
    mechanism:    by reference
    Identifier of the transaction to be ended.

    If this argument is omitted, $END_TRANS ends the default
    transaction of the calling process.