Getting a message using the wait option

This example demonstrates how to use the wait option of the MQGET call.

This code accepts truncated messages. This extract is taken from the Credit Check sample application (program CSQ4CCB5) supplied with IBM MQ for z/OS . For the names and locations of the sample applications on other platforms, see Sample procedural programs (platforms except z/OS ).

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MQLONG   Hconn;              /* Connection handle        */
MQHOBJ   Hobj_CheckQ;        /* Object handle            */
MQLONG   CompCode;           /* Completion code          */
MQLONG   Reason;             /* Qualifying reason        */
MQOD     ObjDesc    = {MQOD_DEFAULT};
                             /* Object descriptor        */
MQMD     MsgDesc    = {MQMD_DEFAULT};
                             /* Message descriptor       */
MQLONG   OpenOptions;
                             /* Control the MQOPEN call  */
MQGMO    GetMsgOpts = {MQGMO_DEFAULT};
                             /* Get Message Options      */
MQLONG   MsgBuffLen;         /* Length of message buffer */
CSQ4BCAQ MsgBuffer;          /* Message structure        */
MQLONG   DataLen;            /* Length of message        */

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void main(void)
   {
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   /*                                                    */
   /* Initialize options and open the queue for input    */
   /*                                                    */
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      /*                                                 */
      /* Get and process messages                        */
      /*                                                 */
      GetMsgOpts.Options = MQGMO_WAIT +
                           MQGMO_ACCEPT_TRUNCATED_MSG +
                           MQGMO_SYNCPOINT;
      GetMsgOpts.WaitInterval = WAIT_INTERVAL;
      MsgBuffLen = sizeof(MsgBuffer);
      memcpy(MsgDesc.MsgId, MQMI_NONE,
             sizeof(MsgDesc.MsgId));
      memcpy(MsgDesc.CorrelId, MQCI_NONE,
             sizeof(MsgDesc.CorrelId));
      /*                                                 */
      /* Make the first MQGET call outside the loop      */
      /*                                                 */
      MQGET(Hconn,
            Hobj_CheckQ,
            &MsgDesc,
            &GetMsgOpts,
            MsgBuffLen,
            &MsgBuffer,
            &DataLen,
            &CompCode,
            &Reason);
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      /*                                                 */
      /* Test the output of the MQGET call.  If the call */
      /* failed, send an error message showing the       */
      /* completion code and reason code, unless the     */
      /* reason code is NO_MSG AVAILABLE.                */
      /*                                                 */
      if (Reason != MQRC_NO_MSG_AVAILABLE)
         {
         strncpy(TS_Operation, "MQGET", sizeof(TS_Operation));
         strncpy(TS_ObjName, ObjDesc.ObjectName,
                 MQ_Q_NAME_LENGTH);
         Record_Call_Error();
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