Advanced Queuing - Oracle

AQ and Memory Usage
/* Set the correlation id in the message properties descriptor: */
sprintf((char *)corrid, "Msg#: %d", msgno);
checkerr(errhp, OCIAttrSet(msgprop, OCI_DTYPE_AQMSG_PROPERTIES,
(dvoid *)&corrid, strlen(corrid),
OCI_ATTR_CORRELATION, errhp));
/* Enqueue the message and commit: */
checkerr(errhp, OCIAQEnq(svchp, errhp, (CONST text *)"msgqueue",
0, msgprop, mesgtdo, (dvoid **)&mesg,
(dvoid **)&mesgind, 0, 0));
checkerr(errhp, OCITransCommit(svchp, errhp, (ub4) 0));
} /* end enqmesg */
void main()
{
OCIServer *srvhp;
OCISession *usrhp;
dvoid *tmp;
text buf[80]; /* user supplied text */
int msgno = 0;
OCIInitialize((ub4) OCI_OBJECT, (dvoid *)0, (dvoid * (*)()) 0,
(dvoid * (*)()) 0, (void (*)()) 0 );
OCIHandleAlloc((dvoid *) NULL, (dvoid **) &envhp, (ub4) OCI_HTYPE_ENV,
52, (dvoid **) &tmp);
OCIEnvInit( &envhp, (ub4) OCI_DEFAULT, 21, (dvoid **) &tmp );
OCIHandleAlloc((dvoid *) envhp, (dvoid **) &errhp, (ub4) OCI_HTYPE_ERROR,
52, (dvoid **) &tmp);
OCIHandleAlloc((dvoid *) envhp, (dvoid **) &srvhp, (ub4) OCI_HTYPE_SERVER,
52, (dvoid **) &tmp);
OCIServerAttach(srvhp, errhp, (text *) 0, (sb4) 0, (ub4) OCI_DEFAULT);
OCIHandleAlloc((dvoid *) envhp, (dvoid **) &svchp, (ub4) OCI_HTYPE_SVCCTX,
52, (dvoid **) &tmp);
/* Set attribute server context in the service context: */
OCIAttrSet((dvoid *) svchp, (ub4) OCI_HTYPE_SVCCTX, (dvoid *)srvhp, (ub4) 0,
(ub4) OCI_ATTR_SERVER, (OCIError *) errhp);
/* Allocate a user context handle: */
A-78 Oracle9i Application Developer’s Guide - Advanced Queuing