xref: /haiku/headers/compatibility/bsd/sys/time.h (revision 9ecf9d1c1d4888d341a6eac72112c72d1ae3a4cb)
1 /*
2  * Copyright 2006, Haiku, Inc. All Rights Reserved.
3  * Distributed under the terms of the MIT License.
4  */
5 /*
6  * Copyright (c) 1982, 1986, 1993
7  *	The Regents of the University of California.  All rights reserved.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
12  * 1. Redistributions of source code must retain the above copyright
13  *    notice, this list of conditions and the following disclaimer.
14  * 2. Redistributions in binary form must reproduce the above copyright
15  *    notice, this list of conditions and the following disclaimer in the
16  *    documentation and/or other materials provided with the distribution.
17  * 4. Neither the name of the University nor the names of its contributors
18  *    may be used to endorse or promote products derived from this software
19  *    without specific prior written permission.
20  *
21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31  * SUCH DAMAGE.
32  */
33 #ifndef _BSD_SYS_TIME_H_
34 #define _BSD_SYS_TIME_H_
35 
36 
37 #include_next <sys/time.h>
38 
39 
40 #define	timerclear(tv)							\
41 	((tv)->tv_sec = (tv)->tv_usec = 0)
42 #define	timerisset(tv)							\
43 	((tv)->tv_sec || (tv)->tv_usec)
44 #define	timercmp(tv, uv, cmp)					\
45 	(((tvp)->tv_sec == (uvp)->tv_sec) ?			\
46 	    ((tvp)->tv_usec cmp (uvp)->tv_usec) :	\
47 	    ((tvp)->tv_sec cmp (uvp)->tv_sec))
48 #define timeradd(tvp, uvp, vvp)					\
49 	do {										\
50 		(vvp)->tv_sec = (tvp)->tv_sec + (uvp)->tv_sec;		\
51 		(vvp)->tv_usec = (tvp)->tv_usec + (uvp)->tv_usec;	\
52 		if ((vvp)->tv_usec >= 1000000) {		\
53 			(vvp)->tv_sec++;					\
54 			(vvp)->tv_usec -= 1000000;			\
55 		}										\
56 	} while (0)
57 #define timersub(tvp, uvp, vvp)					\
58 	do {										\
59 		(vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec;		\
60 		(vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec;	\
61 		if ((vvp)->tv_usec < 0) {				\
62 			(vvp)->tv_sec--;					\
63 			(vvp)->tv_usec += 1000000;			\
64 		}										\
65 	} while (0)
66 
67 #endif	/* _BSD_SYS_TIME_H_ */
68