📄 os_q.ls1
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ct, the
598 ; * interrupt disable time is proportional to the number of tasks waiting on t
he queue.
599 ; *****************************************************************************************
****************
600 ; */
601 ;
602 ; #if OS_Q_POST_OPT_EN > 0
603 ; INT8U OSQPostOpt (OS_EVENT *pevent, void *msg, INT8U opt)
604 ; {
605 ;
606 ; OS_Q *pq;
607 ;
608 ;
609 ; #if OS_ARG_CHK_EN > 0
610 ; if (pevent == (OS_EVENT *)0) { /* Validate 'pevent'
*/
611 ; return (OS_ERR_PEVENT_NULL);
612 ; }
613 ; if (msg == (void *)0) { /* Make sure we are not posting a N
ULL pointer */
614 ; return (OS_ERR_POST_NULL_PTR);
615 ; }
616 ; if (pevent->OSEventType != OS_EVENT_TYPE_Q) { /* Validate event block type
*/
617 ; return (OS_ERR_EVENT_TYPE);
618 ; }
A51 MACRO ASSEMBLER OS_Q 08/08/2005 11:36:51 PAGE 13
619 ; #endif
620 ; OS_ENTER_CRITICAL();
621 ; if (pevent->OSEventGrp != 0x00) { /* See if any task pending on queue
*/
622 ; if ((opt & OS_POST_OPT_BROADCAST) != 0x00) { /* Do we need to post msg to ALL wa
iting tasks ? */
623 ; while (pevent->OSEventGrp != 0x00) { /* Yes, Post to ALL tasks waiting o
n queue */
624 ; OS_EventTaskRdy(pevent, msg, OS_STAT_Q);
625 ; }
626 ; } else {
627 ; OS_EventTaskRdy(pevent, msg, OS_STAT_Q); /* No, Post to HPT waiting on queu
e */
628 ; }
629 ; OS_EXIT_CRITICAL();
630 ; OS_Sched(); /* Find highest priority task ready
to run */
631 ; return (OS_NO_ERR);
632 ; }
633 ; pq = (OS_Q *)pevent->OSEventPtr; /* Point to queue control block
*/
634 ; if (pq->OSQEntries >= pq->OSQSize) { /* Make sure queue is not full
*/
635 ; OS_EXIT_CRITICAL();
636 ; return (OS_Q_FULL);
637 ; }
638 ; if ((opt & OS_POST_OPT_FRONT) != 0x00) { /* Do we post to the FRONT of the q
ueue? */
639 ; if (pq->OSQOut == pq->OSQStart) { /* Yes, Post as LIFO, Wrap OUT poin
ter if we ... */
640 ; pq->OSQOut = pq->OSQEnd; /* ... are at the 1st queue en
try */
641 ; }
642 ; pq->OSQOut--;
643 ; *pq->OSQOut = msg; /* Insert message into queue
*/
644 ; } else { /* No, Post as FIFO
*/
645 ; *pq->OSQIn++ = msg; /* Insert message into queue
*/
646 ; if (pq->OSQIn == pq->OSQEnd) { /* Wrap IN ptr if we are at en
d of queue */
647 ; pq->OSQIn = pq->OSQStart;
648 ; }
649 ; }
650 ; pq->OSQEntries++; /* Update the nbr of entries in the
queue */
651 ; OS_EXIT_CRITICAL();
652 ; return (OS_NO_ERR);
653 ; }
654 ; #endif
655 ; /*$PAGE*/
656 ; /*
657 ; *****************************************************************************************
****************
658 ; * QUERY A MESSAGE QUEUE
659 ; *
660 ; * Description: This function obtains information about a message queue.
661 ; *
662 ; * Arguments : pevent is a pointer to the event control block associated with the
desired queue
663 ; *
664 ; * pdata is a pointer to a structure that will contain information ab
out the message
665 ; * queue.
666 ; *
A51 MACRO ASSEMBLER OS_Q 08/08/2005 11:36:51 PAGE 14
667 ; * Returns : OS_NO_ERR The call was successful and the message was sent
668 ; * OS_ERR_EVENT_TYPE If you are attempting to obtain data from a non queue.
669 ; * OS_ERR_PEVENT_NULL If 'pevent' is a NULL pointer
670 ; *****************************************************************************************
****************
671 ; */
672 ;
673 ; #if OS_Q_QUERY_EN > 0
674 ; INT8U OSQQuery (OS_EVENT *pevent, OS_Q_DATA *ppdata)
675 ; {
676 ;
677 ; OS_Q *pq;
678 ; INT8U *psrc;
679 ; INT8U *pdest;
680 ;
681 ;
682 ; #if OS_ARG_CHK_EN > 0
683 ; if (pevent == (OS_EVENT *)0) { /* Validate 'pevent'
*/
684 ; return (OS_ERR_PEVENT_NULL);
685 ; }
686 ; if (pevent->OSEventType != OS_EVENT_TYPE_Q) { /* Validate event block type
*/
687 ; return (OS_ERR_EVENT_TYPE);
688 ; }
689 ; #endif
690 ; OS_ENTER_CRITICAL();
691 ; ppdata->OSEventGrp = pevent->OSEventGrp; /* Copy message queue wait li
st */
692 ; psrc = &pevent->OSEventTbl[0];
693 ; pdest = &ppdata->OSEventTbl[0];
694 ; #if OS_EVENT_TBL_SIZE > 0
695 ; *pdest++ = *psrc++;
696 ; #endif
697 ;
698 ; #if OS_EVENT_TBL_SIZE > 1
699 ; *pdest++ = *psrc++;
700 ; #endif
701 ;
702 ; #if OS_EVENT_TBL_SIZE > 2
703 ; *pdest++ = *psrc++;
704 ; #endif
705 ;
706 ; #if OS_EVENT_TBL_SIZE > 3
707 ; *pdest++ = *psrc++;
708 ; #endif
709 ;
710 ; #if OS_EVENT_TBL_SIZE > 4
711 ; *pdest++ = *psrc++;
712 ; #endif
713 ;
714 ; #if OS_EVENT_TBL_SIZE > 5
715 ; *pdest++ = *psrc++;
716 ; #endif
717 ;
718 ; #if OS_EVENT_TBL_SIZE > 6
719 ; *pdest++ = *psrc++;
720 ; #endif
721 ;
722 ; #if OS_EVENT_TBL_SIZE > 7
723 ; *pdest = *psrc;
724 ; #endif
725 ; pq = (OS_Q *)pevent->OSEventPtr;
726 ; if (pq->OSQEntries > 0) {
727 ; ppdata->OSMsg = *pq->OSQOut; /* Get next message to return
if available */
A51 MACRO ASSEMBLER OS_Q 08/08/2005 11:36:51 PAGE 15
728 ; } else {
729 ; ppdata->OSMsg = (void *)0;
730 ; }
731 ; ppdata->OSNMsgs = pq->OSQEntries;
732 ; ppdata->OSQSize = pq->OSQSize;
733 ; OS_EXIT_CRITICAL();
734 ; return (OS_NO_ERR);
735 ; }
736 ; #endif /* OS_Q_QUERY_EN
*/
737 ;
738 ; /*$PAGE*/
739 ; /*
740 ; *****************************************************************************************
****************
741 ; * QUEUE MODULE INITIALIZATION
742 ; *
743 ; * Description : This function is called by uC/OS-II to initialize the message queue modul
e. Your
744 ; * application MUST NOT call this function.
745 ; *
746 ; * Arguments : none
747 ; *
748 ; * Returns : none
749 ; *
750 ; * Note(s) : This function is INTERNAL to uC/OS-II and your application should not call
it.
751 ; *****************************************************************************************
****************
752 ; */
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