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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 | |
9 | under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
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 | |
16 | General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
1e2e8133 LP |
22 | #include <assert.h> |
23 | ||
24 | #include "ratelimit.h" | |
25 | #include "log.h" | |
26 | ||
27 | /* Modelled after Linux' lib/ratelimit.c by Dave Young | |
28 | * <hidave.darkstar@gmail.com>, which is licensed GPLv2. */ | |
29 | ||
30 | bool ratelimit_test(RateLimit *r) { | |
871d7de4 | 31 | usec_t ts; |
1e2e8133 | 32 | |
1e2e8133 | 33 | assert(r); |
cafac610 LP |
34 | |
35 | if (r->interval <= 0 || r->burst <= 0) | |
36 | return true; | |
37 | ||
38 | ts = now(CLOCK_MONOTONIC); | |
1e2e8133 LP |
39 | |
40 | if (r->begin <= 0 || | |
871d7de4 | 41 | r->begin + r->interval < ts) { |
871d7de4 | 42 | r->begin = ts; |
1e2e8133 | 43 | |
4ce9faa9 HH |
44 | /* Reset counter */ |
45 | r->num = 0; | |
1e2e8133 LP |
46 | goto good; |
47 | } | |
48 | ||
4ce9faa9 | 49 | if (r->num <= r->burst) |
1e2e8133 LP |
50 | goto good; |
51 | ||
1e2e8133 LP |
52 | return false; |
53 | ||
54 | good: | |
4ce9faa9 | 55 | r->num++; |
1e2e8133 LP |
56 | return true; |
57 | } |