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Add helper for kqueue timers callout scheduling 

Reviewed by:	markj
Tested by:	markj, pho
Sponsored by:	The FreeBSD Foundation
MFC after:	2 weeks
Differential revision:	https://reviews.freebsd.org/D29106
This commit is contained in:
Konstantin Belousov 2021-03-06 01:31:20 +02:00
parent 4d27d8d2f3
commit 533e5057ed
1 changed files with 13 additions and 4 deletions
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17
sys/kern/kern_event.c
View File

@ -676,10 +676,19 @@ timer2sbintime(int64_t data, int flags)
struct kq_timer_cb_data {
struct callout c;
struct knote *kn;
int cpuid;
sbintime_t next; /* next timer event fires at */
sbintime_t to; /* precalculated timer period, 0 for abs */
};
static void
kqtimer_sched_callout(struct kq_timer_cb_data *kc)
{
callout_reset_sbt_on(&kc->c, kc->next, 0, filt_timerexpire, kc->kn,
kc->cpuid, C_ABSOLUTE);
}
static void
filt_timerexpire(void *knx)
{
@ -696,8 +705,7 @@ filt_timerexpire(void *knx)
if (kc->to == 0)
return;
kc->next += kc->to;
callout_reset_sbt_on(&kc->c, kc->next, 0, filt_timerexpire, kn,
PCPU_GET(cpuid), C_ABSOLUTE);
kqtimer_sched_callout(kc);
}
/*
@ -753,6 +761,8 @@ filt_timerattach(struct knote *kn)
kn->kn_flags |= EV_CLEAR; /* automatically set */
kn->kn_status &= ~KN_DETACHED; /* knlist_add clears it */
kn->kn_ptr.p_v = kc = malloc(sizeof(*kc), M_KQUEUE, M_WAITOK);
kc->kn = kn;
kc->cpuid = PCPU_GET(cpuid);
callout_init(&kc->c, 1);
filt_timerstart(kn, to);
@ -772,8 +782,7 @@ filt_timerstart(struct knote *kn, sbintime_t to)
kc->next = to + sbinuptime();
kc->to = to;
}
callout_reset_sbt_on(&kc->c, kc->next, 0, filt_timerexpire, kn,
PCPU_GET(cpuid), C_ABSOLUTE);
kqtimer_sched_callout(kc);
}
static void