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/*-*- Mode: C; c-basic-offset: 8 -*-*/
/***
This file is part of systemd.
Copyright 2010 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <assert.h>
#include "ratelimit.h"
#include "log.h"
/* Modelled after Linux' lib/ratelimit.c by Dave Young
* <hidave.darkstar@gmail.com>, which is licensed GPLv2. */
bool ratelimit_test(RateLimit *r) {
usec_t timestamp;
timestamp = now(CLOCK_MONOTONIC);
assert(r);
assert(r->interval > 0);
assert(r->burst > 0);
if (r->begin <= 0 ||
r->begin + r->interval < timestamp) {
if (r->n_missed > 0)
log_warning("%u events suppressed", r->n_missed);
r->begin = timestamp;
/* Reset counters */
r->n_printed = 0;
r->n_missed = 0;
goto good;
}
if (r->n_printed <= r->burst)
goto good;
r->n_missed++;
return false;
good:
r->n_printed++;
return true;
}
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