📄 os_flag.ls1
字号:
581 ; flags_cur = pgrp->OSFlagFlags; /* Will return the state of th
e group */
582 ; OS_EXIT_CRITICAL(); /* Yes, condition met, return
to caller */
583 ; *err = OS_NO_ERR;
584 ; return (flags_cur);
585 ; } else { /* Block task until events occ
ur or timeout */
586 ; OS_FlagBlock(pgrp, &node, flags, wait_type, timeout);
587 ; OS_EXIT_CRITICAL();
588 ; }
589 ; break;
590 ; #endif
591 ;
592 ; default:
593 ; OS_EXIT_CRITICAL();
594 ; flags_cur = (OS_FLAGS)0;
595 ; *err = OS_FLAG_ERR_WAIT_TYPE;
596 ; return (flags_cur);
597 ; }
598 ; OS_Sched(); /* Find next HPT ready to run
*/
599 ; OS_ENTER_CRITICAL();
600 ; if (OSTCBCur->OSTCBStat & OS_STAT_FLAG) { /* Have we timed-out?
*/
601 ; OS_FlagUnlink(&node);
602 ; OSTCBCur->OSTCBStat = OS_STAT_RDY; /* Yes, make task ready-to-run
*/
603 ; OS_EXIT_CRITICAL();
604 ; flags_cur = (OS_FLAGS)0;
605 ; *err = OS_TIMEOUT; /* Indicate that we timed-out
waiting */
606 ; } else {
607 ; if (consume == TRUE) { /* See if we need to consume t
he flags */
608 ; switch (wait_type) {
609 ; case OS_FLAG_WAIT_SET_ALL:
610 ; case OS_FLAG_WAIT_SET_ANY: /* Clear ONLY the flags we got
*/
611 ; pgrp->OSFlagFlags &= ~OSTCBCur->OSTCBFlagsRdy;
612 ; break;
613 ;
614 ; #if OS_FLAG_WAIT_CLR_EN > 0
615 ; case OS_FLAG_WAIT_CLR_ALL:
616 ; case OS_FLAG_WAIT_CLR_ANY: /* Set ONLY the flags we got
*/
617 ; pgrp->OSFlagFlags |= OSTCBCur->OSTCBFlagsRdy;
A51 MACRO ASSEMBLER OS_FLAG 05/17/2005 11:19:52 PAGE 13
618 ; break;
619 ; #endif
620 ; }
621 ; }
622 ; flags_cur = pgrp->OSFlagFlags;
623 ; OS_EXIT_CRITICAL();
624 ; *err = OS_NO_ERR; /* Event(s) must have occurred
*/
625 ; }
626 ; return (flags_cur);
627 ; }
628 ; /*$PAGE*/
629 ; /*
630 ; *****************************************************************************************
****************
631 ; * POST EVENT FLAG BIT(S)
632 ; *
633 ; * Description: This function is called to set or clear some bits in an event flag group.
The bits to
634 ; * set or clear are specified by a 'bit mask'.
635 ; *
636 ; * Arguments : pgrp is a pointer to the desired event flag group.
637 ; *
638 ; * flags If 'opt' (see below) is OS_FLAG_SET, each bit that is set in
'flags' will
639 ; * set the corresponding bit in the event flag group. e.g. to
set bits 0, 4
640 ; * and 5 you would set 'flags' to:
641 ; *
642 ; * 0x31 (note, bit 0 is least significant bit)
643 ; *
644 ; * If 'opt' (see below) is OS_FLAG_CLR, each bit that is set in
'flags' will
645 ; * CLEAR the corresponding bit in the event flag group. e.g. t
o clear bits 0,
646 ; * 4 and 5 you would specify 'flags' as:
647 ; *
648 ; * 0x31 (note, bit 0 is least significant bit)
649 ; *
650 ; * opt indicates whether the flags will be:
651 ; * set (OS_FLAG_SET) or
652 ; * cleared (OS_FLAG_CLR)
653 ; *
654 ; * err is a pointer to an error code and can be:
655 ; * OS_NO_ERR The call was successfull
656 ; * OS_FLAG_INVALID_PGRP You passed a NULL pointer
657 ; * OS_ERR_EVENT_TYPE You are not pointing to an event flag
group
658 ; * OS_FLAG_INVALID_OPT You specified an invalid option
659 ; *
660 ; * Returns : the new value of the event flags bits that are still set.
661 ; *
662 ; * Called From: Task or ISR
663 ; *
664 ; * WARNING(s) : 1) The execution time of this function depends on the number of tasks wait
ing on the event
665 ; * flag group.
666 ; * 2) The amount of time interrupts are DISABLED depends on the number of tas
ks waiting on
667 ; * the event flag group.
668 ; *****************************************************************************************
****************
669 ; */
670 ; OS_FLAGS OSFlagPost (OS_FLAG_GRP *pgrp, OS_FLAGS flags, INT8U opt, INT8U *err)LG_REENTRA
NT
671 ; {
A51 MACRO ASSEMBLER OS_FLAG 05/17/2005 11:19:52 PAGE 14
672 ; #if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status r
egister */
673 ; OS_CPU_SR cpu_sr;
674 ; #endif
675 ; OS_FLAG_NODE *pnode;
676 ; BOOLEAN sched;
677 ; OS_FLAGS flags_cur;
678 ; OS_FLAGS flags_rdy;
679 ;
680 ;
681 ; #if OS_ARG_CHK_EN > 0
682 ; if (pgrp == (OS_FLAG_GRP *)0) { /* Validate 'pgrp'
*/
683 ; *err = OS_FLAG_INVALID_PGRP;
684 ; return ((OS_FLAGS)0);
685 ; }
686 ; if (pgrp->OSFlagType != OS_EVENT_TYPE_FLAG) { /* Make sure we are pointing to an e
vent flag grp */
687 ; *err = OS_ERR_EVENT_TYPE;
688 ; return ((OS_FLAGS)0);
689 ; }
690 ; #endif
691 ; /*$PAGE*/
692 ; OS_ENTER_CRITICAL();
693 ; switch (opt) {
694 ; case OS_FLAG_CLR:
695 ; pgrp->OSFlagFlags &= ~flags; /* Clear the flags specified in the
group */
696 ; break;
697 ;
698 ; case OS_FLAG_SET:
699 ; pgrp->OSFlagFlags |= flags; /* Set the flags specified in the
group */
700 ; break;
701 ;
702 ; default:
703 ; OS_EXIT_CRITICAL(); /* INVALID option
*/
704 ; *err = OS_FLAG_INVALID_OPT;
705 ; return ((OS_FLAGS)0);
706 ; }
707 ; sched = FALSE; /* Indicate that we don't need resch
eduling */
708 ; pnode = (OS_FLAG_NODE *)pgrp->OSFlagWaitList;
709 ; while (pnode != (OS_FLAG_NODE *)0) { /* Go through all tasks waiting on e
vent flag(s) */
710 ; switch (pnode->OSFlagNodeWaitType) {
711 ; case OS_FLAG_WAIT_SET_ALL: /* See if all req. flags are set for
current node */
712 ; flags_rdy = pgrp->OSFlagFlags & pnode->OSFlagNodeFlags;
713 ; if (flags_rdy == pnode->OSFlagNodeFlags) {
714 ; if (OS_FlagTaskRdy(pnode, flags_rdy) == TRUE) { /* Make task RTR, ev
ent(s) Rx'd */
715 ; sched = TRUE; /* When done we will
reschedule */
716 ; }
717 ; }
718 ; break;
719 ;
720 ; case OS_FLAG_WAIT_SET_ANY: /* See if any flag set
*/
721 ; flags_rdy = pgrp->OSFlagFlags & pnode->OSFlagNodeFlags;
722 ; if (flags_rdy != (OS_FLAGS)0) {
723 ; if (OS_FlagTaskRdy(pnode, flags_rdy) == TRUE) { /* Make task RTR, ev
ent(s) Rx'd */
724 ; sched = TRUE; /* When done we will
A51 MACRO ASSEMBLER OS_FLAG 05/17/2005 11:19:52 PAGE 15
reschedule */
725 ; }
726 ; }
727 ; break;
728 ;
729 ; #if OS_FLAG_WA⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -