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65 lines
1.4 KiB
C
65 lines
1.4 KiB
C
/*
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* BIRD -- Settle timer
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*
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* (c) 2022 Maria Matejka <mq@jmq.cz>
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* (c) 2022 CZ.NIC z.s.p.o.
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*
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* Can be freely distributed and used under the terms of the GNU GPL.
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*/
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#ifndef _BIRD_SETTLE_H_
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#define _BIRD_SETTLE_H_
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#include "lib/birdlib.h"
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#include "lib/timer.h"
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struct settle_config {
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btime min, max;
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};
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struct settle {
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union {
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/* Timer hook polymorphism. */
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struct {
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resource _r;
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void (*hook)(struct settle *);
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};
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timer tm;
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};
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struct settle_config cf;
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btime started;
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};
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STATIC_ASSERT(OFFSETOF(struct settle, hook) == OFFSETOF(struct settle, tm) + OFFSETOF(timer, hook));
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#define SETTLE_INIT(_cfp, _hook, _data) (struct settle) { .tm = { .data = (_data), .hook = TYPE_CAST(void (*)(struct settle *), void (*)(struct timer *), (_hook)), }, .cf = ({ASSERT_DIE((_cfp)->min <= (_cfp)->max); *(_cfp); }), }
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static inline void settle_init(struct settle *s, struct settle_config *cf, void (*hook)(struct settle *), void *data)
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{
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*s = SETTLE_INIT(cf, hook, data);
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}
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#define settle_active(s) tm_active(&(s)->tm)
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static inline void settle_kick(struct settle *s)
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{
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if (!tm_active(&s->tm))
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{
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s->started = current_time();
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tm_set(&s->tm, s->started + s->cf.min);
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}
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else
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{
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btime now = current_time();
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tm_set(&s->tm, MIN_(now + s->cf.min, s->started + s->cf.max));
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}
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}
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static inline void settle_cancel(struct settle *s)
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{
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tm_stop(&s->tm);
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}
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#endif
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