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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
1e2e8133 | 2 | |
a7334b09 LP |
3 | /*** |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
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9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
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11 | (at your option) any later version. |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 16 | Lesser General Public License for more details. |
a7334b09 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
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19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
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22 | |
23 | #include "ratelimit.h" | |
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24 | |
25 | /* Modelled after Linux' lib/ratelimit.c by Dave Young | |
26 | * <hidave.darkstar@gmail.com>, which is licensed GPLv2. */ | |
27 | ||
28 | bool ratelimit_test(RateLimit *r) { | |
871d7de4 | 29 | usec_t ts; |
1e2e8133 | 30 | |
1e2e8133 | 31 | assert(r); |
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32 | |
33 | if (r->interval <= 0 || r->burst <= 0) | |
34 | return true; | |
35 | ||
36 | ts = now(CLOCK_MONOTONIC); | |
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37 | |
38 | if (r->begin <= 0 || | |
871d7de4 | 39 | r->begin + r->interval < ts) { |
871d7de4 | 40 | r->begin = ts; |
1e2e8133 | 41 | |
4ce9faa9 HH |
42 | /* Reset counter */ |
43 | r->num = 0; | |
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44 | goto good; |
45 | } | |
46 | ||
1c008326 | 47 | if (r->num < r->burst) |
1e2e8133 LP |
48 | goto good; |
49 | ||
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50 | return false; |
51 | ||
52 | good: | |
4ce9faa9 | 53 | r->num++; |
1e2e8133 LP |
54 | return true; |
55 | } |