createmesgqueue.c
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/**************************************************************************
* *
* Copyright (C) 1994, Silicon Graphics, Inc. *
* *
* These coded instructions, statements, and computer programs contain *
* unpublished proprietary information of Silicon Graphics, Inc., and *
* are protected by Federal copyright law. They may not be disclosed *
* to third parties or copied or duplicated in any form, in whole or *
* in part, without the prior written consent of Silicon Graphics, Inc. *
* *
**************************************************************************/
#include "osint.h"
/* #include "assert.h" */
/*
* Name: osCreateMesgQueue
*
* Description:
* This routine initializes the message queue structure with number of
* messages that this queue can hold. 'msg' points to an array of empty
* messages and 'msgCount' contains the number of messages in the array.
*
* Globals Referenced:
* __osThreadTail (thread.c)
*/
void
osCreateMesgQueue(OSMesgQueue *mq, OSMesg *msg, s32 msgCount)
{
/* Make sure that message queue and message buffer are not null */
/* assert(mq != NULL); */
/* assert(msg != NULL); */
#ifdef _DEBUG
if (msgCount <= 0) {
__osError(ERR_OSCREATEMESGQUEUE, 1, msgCount);
return;
}
#endif
/* assert(msgCount > 0); */ /* Ensure that message count is > 0 */
mq->mtqueue = (OSThread *)&__osThreadTail;
mq->fullqueue = (OSThread *)&__osThreadTail;
mq->validCount = 0;
mq->first = 0;
mq->msgCount = msgCount;
mq->msg = msg;
} /* end of osCreateMesgQueue */