/** 

 *  @file MsgQSend.cpp

 *  Description: Source file for MsgQLib's MsgQSend 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 <string.h>

#include <msgqlib.h>

#include <msgqinternal.h>

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

* MsgQSend (qName, msg, nBytes, priority, timeout, err)

* Description:  Function for sending a message with internal copy

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

EXPORT_C int MsgQSend(ULONG qName, char* msg, ULONG nBytes, ULONG priority, int timeout, int* err)

{

	int         qId;

	struct {

		long mtype;

		char mtext[MAX_MSG_LEN];

	} message;

	/* check parameters */

	if ((priority == MSG_PRI_NORMAL) || (priority == MSG_PRI_URGENT)) {

		if((qId = msgget((key_t) qName ,IPC_CREAT | 0666 /*| IPC_EXCL */ )) >=0 ) {

				if( 1 ) {

					message.mtype = 1;

					bcopy(msg, message.mtext, nBytes);

					message.mtext[nBytes] = '\0';

					if(msgsnd (qId, &message, (size_t)nBytes+4, timeout) == OK) {

						*err = OK;

						/* After successfull send, unlock the message queue by using post operation on semaphore.*/

						return (OK);

					}

					else {

						*err = errno;

					}

				}

				else

					*err = errno;

		}

		else

			*err = KMsgQLibQIdErr;

	}

	else

		*err = KMsgQLibParamErr;

	return(ERROR);

}