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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
a7334b09 LP |
2 | /*** |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright 2010 Lennart Poettering | |
a7334b09 LP |
6 | ***/ |
7 | ||
1e2e8133 | 8 | |
11c3a366 TA |
9 | #include <sys/time.h> |
10 | ||
11c3a366 | 11 | #include "macro.h" |
93cc7779 | 12 | #include "ratelimit.h" |
1e2e8133 LP |
13 | |
14 | /* Modelled after Linux' lib/ratelimit.c by Dave Young | |
15 | * <hidave.darkstar@gmail.com>, which is licensed GPLv2. */ | |
16 | ||
17 | bool ratelimit_test(RateLimit *r) { | |
871d7de4 | 18 | usec_t ts; |
1e2e8133 | 19 | |
1e2e8133 | 20 | assert(r); |
cafac610 LP |
21 | |
22 | if (r->interval <= 0 || r->burst <= 0) | |
23 | return true; | |
24 | ||
25 | ts = now(CLOCK_MONOTONIC); | |
1e2e8133 LP |
26 | |
27 | if (r->begin <= 0 || | |
871d7de4 | 28 | r->begin + r->interval < ts) { |
871d7de4 | 29 | r->begin = ts; |
1e2e8133 | 30 | |
4ce9faa9 HH |
31 | /* Reset counter */ |
32 | r->num = 0; | |
1e2e8133 LP |
33 | goto good; |
34 | } | |
35 | ||
1c008326 | 36 | if (r->num < r->burst) |
1e2e8133 LP |
37 | goto good; |
38 | ||
1e2e8133 LP |
39 | return false; |
40 | ||
41 | good: | |
4ce9faa9 | 42 | r->num++; |
1e2e8133 LP |
43 | return true; |
44 | } |