ratelimit.c revision 11c3a36649e5e5e77db499c92f3cdcbd619efd3a
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
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 Lesser General Public License as published by
the Free Software Foundation; either version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <sys/time.h>
#include "ratelimit.h"
#include "macro.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 ts;
assert(r);
if (r->interval <= 0 || r->burst <= 0)
return true;
ts = now(CLOCK_MONOTONIC);
if (r->begin <= 0 ||
r->begin + r->interval < ts) {
r->begin = ts;
/* Reset counter */
r->num = 0;
goto good;
}
if (r->num < r->burst)
goto good;
return false;
good:
r->num++;
return true;
}