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