Manage callback functions - MQ_CB_EXIT

MQ_CB_EXIT provides an exit function to perform before and after the MQCB call. Use function identifier MQXF_CB with exit reasons MQXR_BEFORE and MQXR_AFTER to register before and after MQCB call exit functions.

The interface to this function is: 
MQ_CB_EXIT (&ExitParms, &ExitContext, &Hconn, &Operation, &pCallbackDesc,
            &Hobj, &pMsgDesc, &pGetMsgOpts, &CompCode, &Reason)
where the parameters are:
ExitParms (MQAXP) - input/output
Exit parameter structure
ExitContext (MQAXC) - input/output
Exit context structure
Hconn (MQHCONN) - input/output
Connection handle
Operation (MQLONG) - input/output
Operation value
pCallbackDesc (PMQCBD) - input/output
Callback descriptor
Hobj (MQHOBJ) - input/output
Object handle
pMsgDesc (PMQMD) - input/output
Message descriptor
pGetMsgOpts (PMQGMO) - input/output
Options that control the action of MQCB
CompCode (MQLONG) - input/output
Completion code
Reason (MQLONG) - input/output
Reason code qualifying CompCode

C language invocation

The queue manager logically defines the following variables: 
        MQAXP    ExitParms;      /* Exit parameter structure */
        MQAXC    ExitContext;    /* Exit context structure */
        MQHCONN  Hconn;          /* Connection handle */
        MQLONG   Operation;      /* Operation value. */
        MQCBD    pMsgDesc;       /* Callback descriptor. */
        MQHOBJ   Hobj;           /* Object handle. */
        PMQMD    pMsgDesc;       /* Message descriptor */
        PMQGMO   pGetMsgOpts;    /* Options that define the operation of the consumer */
        PMQLONG  CompCode;       /* Completion code. */
        PMQLONG  Reason;         /* Reason code qualifying CompCode. */
The queue manager then logically calls the exit as follows: 
       MQ_CB_EXIT (&ExitParms, &ExitContext, &Hconn, &Operation, &Hobj, &pMsgDesc,
                   &pGetMsgOpts, &CompCode, &Reason);
Your exit must match the following C function prototype: 
void MQENTRY MQ_CB_EXIT (
PMQAXP     pExitParms;     /* Exit parameter structure */
PMQAXC     pExitContext;   /* Exit context structure */
PMQHCONN   pHconn;         /* Connection handle */
PMQLONG    pOperation;     /* Callback operation */
PMQHOBJ    pHobj;          /* Object handle */
PPMQMD     ppMsgDesc;      /* Message descriptor */
PPMQGMO    ppGetMsgOpts;   /* Options that control the action of MQCB */
PMQLONG    pCompCode;      /* Completion code */
PMQLONG    pReason;        /* Reason code qualifying CompCode */