2 * This file is part of DisOrder.
3 * Copyright (C) 2007-2009 Richard Kettlewell
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 /** @file lib/timeval.h
19 * @brief Arithmetic on timeval structures
27 static inline struct timeval
tvsub(const struct timeval a
,
28 const struct timeval b
) {
31 r
.tv_sec
= a
.tv_sec
- b
.tv_sec
;
32 r
.tv_usec
= a
.tv_usec
- b
.tv_usec
;
37 if(r
.tv_usec
> 999999) {
44 static inline struct timeval
tvadd(const struct timeval a
,
45 const struct timeval b
) {
48 r
.tv_sec
= a
.tv_sec
+ b
.tv_sec
;
49 r
.tv_usec
= a
.tv_usec
+ b
.tv_usec
;
54 if(r
.tv_usec
> 999999) {
61 static inline double tvdouble(const struct timeval a
) {
62 return a
.tv_sec
+ a
.tv_usec
/ 1000000.0;
65 static inline int64_t tvsub_us(const struct timeval a
,
66 const struct timeval b
) {
67 return (((uint64_t)a
.tv_sec
* 1000000 + a
.tv_usec
)
68 - ((uint64_t)b
.tv_sec
* 1000000 + b
.tv_usec
));
71 /** @brief Great-than comparison for timevals */
72 static inline int tvgt(const struct timeval
*a
, const struct timeval
*b
) {
73 if(a
->tv_sec
> b
->tv_sec
)
75 if(a
->tv_sec
== b
->tv_sec
76 && a
->tv_usec
> b
->tv_usec
)
82 comparison for timevals */
83 static inline int tvlt(const struct timeval
*a
, const struct timeval
*b
) {
84 if(a
->tv_sec
< b
->tv_sec
)
86 if(a
->tv_sec
== b
->tv_sec
87 && a
->tv_usec
< b
->tv_usec
)
92 /** @brief Greater-than-or-equal comparison for timevals */
93 static inline int tvge(const struct timeval
*a
, const struct timeval
*b
) {
97 /** @brief Less-than-or-equal comparison for timevals */
98 static inline int tvle(const struct timeval
*a
, const struct timeval
*b
) {
102 #endif /* TIMEVAL_H */