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a7334b09 LP |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2010 Lennart Poettering | |
5 | ||
6 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
7 | under the terms of the GNU Lesser General Public License as published by |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
a7334b09 LP |
9 | (at your option) any later version. |
10 | ||
11 | systemd is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 14 | Lesser General Public License for more details. |
a7334b09 | 15 | |
5430f7f2 | 16 | You should have received a copy of the GNU Lesser General Public License |
a7334b09 LP |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
18 | ***/ | |
19 | ||
1e2e8133 | 20 | |
11c3a366 TA |
21 | #include <sys/time.h> |
22 | ||
11c3a366 | 23 | #include "macro.h" |
93cc7779 | 24 | #include "ratelimit.h" |
1e2e8133 LP |
25 | |
26 | /* Modelled after Linux' lib/ratelimit.c by Dave Young | |
27 | * <hidave.darkstar@gmail.com>, which is licensed GPLv2. */ | |
28 | ||
29 | bool ratelimit_test(RateLimit *r) { | |
871d7de4 | 30 | usec_t ts; |
1e2e8133 | 31 | |
1e2e8133 | 32 | assert(r); |
cafac610 LP |
33 | |
34 | if (r->interval <= 0 || r->burst <= 0) | |
35 | return true; | |
36 | ||
37 | ts = now(CLOCK_MONOTONIC); | |
1e2e8133 LP |
38 | |
39 | if (r->begin <= 0 || | |
871d7de4 | 40 | r->begin + r->interval < ts) { |
871d7de4 | 41 | r->begin = ts; |
1e2e8133 | 42 | |
4ce9faa9 HH |
43 | /* Reset counter */ |
44 | r->num = 0; | |
1e2e8133 LP |
45 | goto good; |
46 | } | |
47 | ||
1c008326 | 48 | if (r->num < r->burst) |
1e2e8133 LP |
49 | goto good; |
50 | ||
1e2e8133 LP |
51 | return false; |
52 | ||
53 | good: | |
4ce9faa9 | 54 | r->num++; |
1e2e8133 LP |
55 | return true; |
56 | } |