📄 os_flag.ls1
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*/
573 ; }
574 ; return (flags_cur);
575 ; }
576 ; /*$PAGE*/
577 ; /*
578 ; *****************************************************************************************
****************
579 ; * POST EVENT FLAG BIT(S)
580 ; *
581 ; * Description: This function is called to set or clear some bits in an event flag group.
The bits to
582 ; * set or clear are specified by a 'bit mask'.
583 ; *
584 ; * Arguments : pgrp is a pointer to the desired event flag group.
585 ; *
586 ; * flags If 'opt' (see below) is OS_FLAG_SET, each bit that is set in
'flags' will
587 ; * set the corresponding bit in the event flag group. e.g. to
set bits 0, 4
588 ; * and 5 you would set 'flags' to:
589 ; *
590 ; * 0x31 (note, bit 0 is least significant bit)
591 ; *
592 ; * If 'opt' (see below) is OS_FLAG_CLR, each bit that is set in
'flags' will
593 ; * CLEAR the corresponding bit in the event flag group. e.g. t
o clear bits 0,
594 ; * 4 and 5 you would specify 'flags' as:
595 ; *
596 ; * 0x31 (note, bit 0 is least significant bit)
597 ; *
598 ; * opt indicates whether the flags will be:
599 ; * set (OS_FLAG_SET) or
600 ; * cleared (OS_FLAG_CLR)
601 ; *
602 ; * err is a pointer to an error code and can be:
603 ; * OS_NO_ERR The call was successfull
604 ; * OS_FLAG_INVALID_PGRP You passed a NULL pointer
605 ; * OS_ERR_EVENT_TYPE You are not pointing to an event flag
group
606 ; * OS_FLAG_INVALID_OPT You specified an invalid option
607 ; *
608 ; * Returns : the new value of the event flags bits that are still set.
609 ; *
610 ; * Called From: Task or ISR
611 ; *
612 ; * WARNING(s) : 1) The execution time of this function depends on the number of tasks wait
ing on the event
613 ; * flag group.
614 ; * 2) The amount of time interrupts are DISABLED depends on the number of tas
A51 MACRO ASSEMBLER OS_FLAG 08/08/2005 11:36:41 PAGE 13
ks waiting on
615 ; * the event flag group.
616 ; *****************************************************************************************
****************
617 ; */
618 ; OS_FLAGS OSFlagPost (OS_FLAG_GRP *pgrp, OS_FLAGS flags, INT8U opt, INT8U *err)
619 ; {
620 ;
621 ; OS_FLAG_NODE *pnode;
622 ; BOOLEAN sched;
623 ; OS_FLAGS flags_cur;
624 ; OS_FLAGS flags_rdy;
625 ;
626 ;
627 ; #if OS_ARG_CHK_EN > 0
628 ; if (pgrp == (OS_FLAG_GRP *)0) { /* Validate 'pgrp'
*/
629 ; *err = OS_FLAG_INVALID_PGRP;
630 ; return ((OS_FLAGS)0);
631 ; }
632 ; if (pgrp->OSFlagType != OS_EVENT_TYPE_FLAG) { /* Make sure we are pointing to an e
vent flag grp */
633 ; *err = OS_ERR_EVENT_TYPE;
634 ; return ((OS_FLAGS)0);
635 ; }
636 ; #endif
637 ; /*$PAGE*/
638 ; OS_ENTER_CRITICAL();
639 ; switch (opt) {
640 ; case OS_FLAG_CLR:
641 ; pgrp->OSFlagFlags &= ~flags; /* Clear the flags specified in the
group */
642 ; break;
643 ;
644 ; case OS_FLAG_SET:
645 ; pgrp->OSFlagFlags |= flags; /* Set the flags specified in the
group */
646 ; break;
647 ;
648 ; default:
649 ; OS_EXIT_CRITICAL(); /* INVALID option
*/
650 ; *err = OS_FLAG_INVALID_OPT;
651 ; return ((OS_FLAGS)0);
652 ; }
653 ; sched = FALSE; /* Indicate that we don't need resch
eduling */
654 ; pnode = (OS_FLAG_NODE *)pgrp->OSFlagWaitList;
655 ; while (pnode != (OS_FLAG_NODE *)0) { /* Go through all tasks waiting on e
vent flag(s) */
656 ; switch (pnode->OSFlagNodeWaitType) {
657 ; case OS_FLAG_WAIT_SET_ALL: /* See if all req. flags are set for
current node */
658 ; flags_rdy = pgrp->OSFlagFlags & pnode->OSFlagNodeFlags;
659 ; if (flags_rdy == pnode->OSFlagNodeFlags) {
660 ; if (OS_FlagTaskRdy(pnode, flags_rdy) == TRUE) { /* Make task RTR, ev
ent(s) Rx'd */
661 ; sched = TRUE; /* When done we will
reschedule */
662 ; }
663 ; }
664 ; break;
665 ;
666 ; case OS_FLAG_WAIT_SET_ANY: /* See if any flag set
*/
667 ; flags_rdy = pgrp->OSFlagFlags & pnode->OSFlagNodeFlags;
A51 MACRO ASSEMBLER OS_FLAG 08/08/2005 11:36:41 PAGE 14
668 ; if (flags_rdy != (OS_FLAGS)0) {
669 ; if (OS_FlagTaskRdy(pnode, flags_rdy) == TRUE) { /* Make task RTR, ev
ent(s) Rx'd */
670 ; sched = TRUE; /* When done we will
reschedule */
671 ; }
672 ; }
673 ; break;
674 ;
675 ; #if OS_FLAG_WAIT_CLR_EN > 0
676 ; case OS_FLAG_WAIT_CLR_ALL: /* See if all req. flags are set for
current node */
677 ; flags_rdy = ~pgrp->OSFlagFlags & pnode->OSFlagNodeFlags;
678 ; if (flags_rdy == pnode->OSFlagNodeFlags) {
679 ; if (OS_FlagTaskRdy(pnode, flags_rdy) == TRUE) { /* Make task RTR, ev
ent(s) Rx'd */
680 ; sched = TRUE; /* When done we will
reschedule */
681 ; }
682 ; }
683 ; break;
684 ;
685 ; case OS_FLAG_WAIT_CLR_ANY: /* See if any flag set
*/
686 ; flags_rdy = ~pgrp->OSFlagFlags & pnode->OSFlagNodeFlags;
687 ; if (flags_rdy != (OS_FLAGS)0) {
688 ; if (OS_FlagTaskRdy(pnode, flags_rdy) == TRUE) { /* Make task RTR, ev
ent(s) Rx'd */
689 ; sched = TRUE; /* When done we will
reschedule */
690 ; }
691 ; }
692 ; break;
693 ; #endif
694 ; }
695 ; pnode = (OS_FLAG_NODE *)pnode->OSFlagNodeNext; /* Point to next task waiting for
event flag(s) */
696 ; }
697 ; OS_EXIT_CRITICAL();
698 ; if (sched == TRUE) {
699 ; OS_Sched();
700 ; }
701 ; OS_ENTER_CRITICAL();
702 ; flags_cur = pgrp->OSFlagFlags;
703 ; OS_EXIT_CRITICAL();
704 ; *err = OS_NO_ERR;
705 ; return (flags_cur);
706 ; }
707 ; /*$PAGE*/
708 ; /*
709 ; *****************************************************************************************
****************
710 ; * QUERY EVENT FLAG
711 ; *
712 ; * Description: This function is used to check the value of the event flag group.
713 ; *
714 ; * Arguments : pgrp is a pointer to the desired event flag group.
715 ; *
716 ; * err is a pointer to an error code returned to the called:
717 ; * OS_NO_ERR The call was successfull
718 ; * OS_FLAG_INVALID_PGRP You passed a NULL pointer
719 ; * OS_ERR_EVENT_TYPE You are not pointing to an event flag
group
720 ; *
721 ; * Returns : The current value of the event flag group.
722 ; *
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