Commit | Line | Data |
---|---|---|
507f5694 JG |
1 | /* |
2 | * Copyright (C) 2013 - Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms of the GNU General Public License, version 2 only, as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., 51 | |
15 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
16 | */ | |
17 | ||
18 | #include <common/time.h> | |
19 | #include <common/macros.h> | |
20 | #include <stddef.h> | |
21 | #include <stdint.h> | |
22 | #include <limits.h> | |
23 | #include <errno.h> | |
24 | #include <pthread.h> | |
25 | ||
26 | LTTNG_HIDDEN | |
27 | int timespec_to_ms(struct timespec ts, unsigned long *ms) | |
28 | { | |
29 | unsigned long res, remain_ms; | |
30 | ||
31 | if (ts.tv_sec > ULONG_MAX / MSEC_PER_SEC) { | |
32 | errno = EOVERFLOW; | |
33 | return -1; /* multiplication overflow */ | |
34 | } | |
35 | res = ts.tv_sec * MSEC_PER_SEC; | |
36 | remain_ms = ULONG_MAX - res; | |
37 | if (ts.tv_nsec / NSEC_PER_MSEC > remain_ms) { | |
38 | errno = EOVERFLOW; | |
39 | return -1; /* addition overflow */ | |
40 | } | |
41 | res += ts.tv_nsec / NSEC_PER_MSEC; | |
42 | *ms = res; | |
43 | return 0; | |
44 | } | |
45 | ||
46 | LTTNG_HIDDEN | |
47 | struct timespec timespec_abs_diff(struct timespec t1, struct timespec t2) | |
48 | { | |
49 | uint64_t ts1 = (uint64_t) t1.tv_sec * (uint64_t) NSEC_PER_SEC + | |
50 | (uint64_t) t1.tv_nsec; | |
51 | uint64_t ts2 = (uint64_t) t2.tv_sec * (uint64_t) NSEC_PER_SEC + | |
52 | (uint64_t) t2.tv_nsec; | |
53 | uint64_t diff = max(ts1, ts2) - min(ts1, ts2); | |
54 | struct timespec res; | |
55 | ||
56 | res.tv_sec = diff / (uint64_t) NSEC_PER_SEC; | |
57 | res.tv_nsec = diff % (uint64_t) NSEC_PER_SEC; | |
58 | return res; | |
59 | } |