/*-*- 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; }