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events.c
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events.c
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//
// Created by Vladimir Schneider on 2018-01-28.
//
#include "multitasker.h"
const uint16_t eventDescriptionSize = sizeof(EventDescription);
void InitEvent(Event *event) __naked {
(void)event;
__SYNONYM_FOR(QInitNode)
}
/*
* Wait for next raise event call
*/
void WaitEvent(Event *event) __naked {
(void)event;
// @formatter:off
__asm
sim
ldw x,(3,sp) ; get event sp: pch, pcl, ev.h, ev.l
; put this one in the queue
ldw y,#__QNodeLinkTailInXY
jp __YieldToXatYStack
__endasm;
// @formatter:on
}
/*
* Signal event and release all waiting tasks
*
* tasks are added to the head of the ready queue in FIFO order of their waiting calls
*/
void SignalEvent(Event *event) __naked {
(void)event;
// @formatter:off
__asm
ldw y,#__QNodeLinkTailInXY
signal_event:
push cc
sim
ldw x,(4,sp) ; get event: sp: cc, pch, pcl, ev.h, ev.l
sim
ldw __taskQueue,x
ldw __queueFunction,y
raise.loop:
ldw x,__taskQueue
ldw y,x
cpw y,(QTAIL,x)
jreq release.done ; no one is waiting
ldw y,(QTAIL,y)
ldw x,#_readyTasks
call [__queueFunction] ; push to start of queue so gets faster rescheduling
jra raise.loop
release.done:
pop cc
ret
__endasm;
// @formatter:on
}
#ifdef OPT_PRIORITY_EVENTS
/*
* Signal event and release all waiting tasks to head of queue
*
* tasks are added to the head of the ready queue in LIFO order of their waiting calls
*/
void SignalPriorityEvent(Event *event)__naked {
(void) event;
// @formatter:off
__asm
ldw y,#__QNodeLinkHeadInXY
jra signal_event
__endasm;
// @formatter:on
}
#endif // OPT_PRIORITY_EVENTS