/** 

 *  @file MsgQCreate.cpp

 *  Description: Source file for MsgQLib's MsgQCreate API

 *  Copyright (c) 2007 Nokia Corporation.

*  All rights reserved.

*  Redistribution and use in source and binary forms, with or without modification, 

*  are permitted provided that the following conditions are met:

*  Redistributions of source code must retain the above copyright notice, this list 

*  of conditions and the following disclaimer.Redistributions in binary form must 

*  reproduce the above copyright notice, this list of conditions and the following 

*  disclaimer in the documentation and/or other materials provided with the distribution.

*  Neither the name of the Nokia Corporation nor the names of its contributors may be used 

*  to endorse or promote products derived from this software without specific prior written 

*  permission.

*  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY 

*  EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 

*  OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 

*  SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 

*  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 

*  OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 

*  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 

*  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 

*  EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

#include <errno.h>

#include <sys/msg.h>

#include <sys/sem.h>

#include <msgqinternal.h>

#include <msgliterals.h>

/********************************************************************************

* MsgQCreate

* Description: Creates a message queue

* Inputs:

*  qName   : ULONG that represents the queue name

*  maxMsgs : ULONG that represents maximum size of messages 

*********************************************************************************/

EXPORT_C int MsgQCreate(ULONG qName, ULONG maxMsgs, ULONG qOptions, int* err) {

	    UNUSED_FORMAL_PARAM(qName);

	    UNUSED_FORMAL_PARAM(maxMsgs);

	    UNUSED_FORMAL_PARAM(err);

		if((qOptions == MSG_Q_FIFO) || (qOptions == MSG_Q_PRIORITY)) {

			// Set msg queue options to  FIFO and create the message queue

			qOptions= MSG_Q_FIFO ;

		if((msgget((key_t) qName ,IPC_CREAT | 0666 | IPC_EXCL )) == -1 ) {

			if ( errno == 17 ){

			// message queue already exists

			// now just get the hanlde to it

			// no need to leave over here;

			}

		}

			if((msgget((key_t) qName ,IPC_CREAT | 0666 )) >=0 ) {

				    //  set msg queue parameter max # bytes in queue

					/* if( msgctl(qId,IPC_STAT,&qStatus) == 0  ) 

					if( qStatus.msg_qbytes > (maxMsgs * MAX_MSG_LEN) ) {

						qStatus.msg_qbytes = maxMsgs * MAX_MSG_LEN ;              

						if( msgctl(qId,IPC_SET,&qStatus) < 0) {

							// delete message queue on error 

							msgctl(qId,IPC_RMID,0);

							*err = errno;

							return(ERROR);

						}

					} 

					*/

				*err = OK;                

				return (OK);

			}

			else {

				*err = errno;

			}       

		}

		else {

			*err = KMsgQLibParamErr;

		}

		return(ERROR);

}