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wnstngs
45 lines
1.2 KiB
C
45 lines
1.2 KiB
C
#ifndef _EVENT_H
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#define _EVENT_H
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#include <kernel/poll.h>
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typedef pollheader_t eventheader_t;
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#define EVENT_MAX_ATTACHMENT 5
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typedef struct {
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polldesc_t polldesc;
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polldata_t polldata[EVENT_MAX_ATTACHMENT];
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int current;
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} eventlistener_t;
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#define EVENT_INITHEADER(e) POLL_INITHEADER(e)
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#define EVENT_INITLISTENER(e) { \
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poll_initdesc(&(e)->polldesc, 0); \
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(e)->polldesc.data = (e)->polldata; \
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(e)->polldesc.size = EVENT_MAX_ATTACHMENT; \
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(e)->current = 0; \
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for (int i = 0; i < EVENT_MAX_ATTACHMENT; ++i) { \
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(e)->polldata[i].desc = &(e)->polldesc; \
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(e)->polldata[i].header = NULL; \
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} \
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}
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#define EVENT_ATTACH(e, h) { \
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if ((e)->current >= EVENT_MAX_ATTACHMENT) { \
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/* spin forever to say that there have been too many attachments */ \
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/* this should never happen normally and is meant as a way to alert whoever is programming about it */ \
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for (;;) asm volatile(""); \
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} \
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poll_add(h, &(e)->polldata[(e)->current++], POLLPRI); \
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}
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#define EVENT_WAIT(e, t) poll_dowait(&(e)->polldesc, t)
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#define EVENT_SIGNAL(h) poll_event(h, POLLPRI)
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#define EVENT_DETACHALL(e) { \
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poll_leave(&(e)->polldesc); \
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(e)->current = 0; \
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}
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#endif
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