From a095315b3c31f7a419baceac82c26c3c5ac0cd12 Mon Sep 17 00:00:00 2001 From: Kay Sievers Date: Tue, 9 Jun 2015 14:27:33 +0200 Subject: build-sys: split internal basic/ library from shared/ basic/ can be used by everything cannot use anything outside of basic/ libsystemd/ can use basic/ cannot use shared/ shared/ can use libsystemd/ --- src/basic/ratelimit.c | 55 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 55 insertions(+) create mode 100644 src/basic/ratelimit.c (limited to 'src/basic/ratelimit.c') diff --git a/src/basic/ratelimit.c b/src/basic/ratelimit.c new file mode 100644 index 0000000000..81fc9c19ff --- /dev/null +++ b/src/basic/ratelimit.c @@ -0,0 +1,55 @@ +/*-*- 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 . +***/ + + +#include "ratelimit.h" + +/* Modelled after Linux' lib/ratelimit.c by Dave Young + * , 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; +} -- cgit v1.2.3-54-g00ecf