39 lines
798 B
C
39 lines
798 B
C
#include <internals/events.h>
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#include <events.h>
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#include <clock.h>
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/*
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pollevent()
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Returns the next event. If no one is available, returns an event whose
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type is ET_None. This function always returns immediately.
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*/
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struct Event pollevent(void)
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{
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struct Event event = {
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.type = ET_None
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};
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if(queue_size <= 0) return event;
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event = event_queue[queue_start];
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queue_size--;
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if(queue_start == EVENTS_QUEUE_SIZE - 1) queue_start = 0;
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else queue_start++;
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return event;
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}
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/*
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getevent()
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Returns the next event. If no one is available, waits for something to
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happen. This function uses low-level sleep and should be preferred to
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active waiting using loops.
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*/
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struct Event getevent(void)
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{
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struct Event event;
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while((event = pollevent()).type == ET_None) sleep();
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return event;
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}
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