xref: /freebsd/sys/sys/_clock_id.h (revision d00131e1)
1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
3  *
4  * Copyright (c) 2021 Netflix, Inc.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  * 1. Redistributions of source code must retain the above copyright
10  *    notice, this list of conditions and the following disclaimer.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  *    notice, this list of conditions and the following disclaimer in the
13  *    documentation and/or other materials provided with the distribution.
14  *
15  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25  * SUCH DAMAGE.
26  */
27 
28 #ifndef _SYS_SYS__CLOCK_ID_H
29 #define	_SYS_SYS__CLOCK_ID_H
30 
31 /*
32  * These macros are shared between time.h and sys/time.h.
33  */
34 
35 /*
36  * Note: The values shown below as a comment for the __POSIX_VISIBLE values are
37  * the ones FreeBSD traditionally used based on our reading of the POSIX
38  * standards. However, glibc uses 199309 for all of them, even those many were
39  * not defined there. To remain bug compatible with glibc means more software
40  * that relied on the glibc behavior will compile easily on FreeBSD.
41  *
42  * Also, CLOCK_UPTIME_FAST is improperly visible temporarily for the lang/pocl
43  * port until it can be updated properly. It incorrectly assumes that this was a
44  * standard value. It will be moved back to the __BSD_VISIBLE section once the
45  * issue is corrected.
46  */
47 
48 #if __POSIX_VISIBLE >= 199309		/* 199506 */
49 #define CLOCK_REALTIME		0
50 #endif /* __POSIX_VISIBLE >= 199309 */
51 #ifdef __BSD_VISIBLE
52 #define CLOCK_VIRTUAL		1
53 #define CLOCK_PROF		2
54 #endif /* __BSD_VISIBLE */
55 #if __POSIX_VISIBLE >= 199309		/* 200112 */
56 #define CLOCK_MONOTONIC		4
57 #define CLOCK_UPTIME_FAST	8
58 #endif /* __POSIX_VISIBLE >= 199309 */
59 #ifdef __BSD_VISIBLE
60 /*
61  * FreeBSD-specific clocks.
62  */
63 #define CLOCK_UPTIME		5
64 #define CLOCK_UPTIME_PRECISE	7
65 #define CLOCK_REALTIME_PRECISE	9
66 #define CLOCK_REALTIME_FAST	10
67 #define CLOCK_MONOTONIC_PRECISE	11
68 #define CLOCK_MONOTONIC_FAST	12
69 #define CLOCK_SECOND		13
70 #endif /* __BSD_VISIBLE */
71 
72 #if __POSIX_VISIBLE >= 199309		/* 200112 */
73 #define CLOCK_THREAD_CPUTIME_ID	14
74 #define	CLOCK_PROCESS_CPUTIME_ID 15
75 #endif /* __POSIX_VISIBLE >= 199309 */
76 
77 /*
78  * Linux compatible names.
79  */
80 #if __BSD_VISIBLE
81 #define	CLOCK_BOOTTIME		CLOCK_UPTIME
82 #define	CLOCK_REALTIME_COARSE	CLOCK_REALTIME_FAST
83 #define	CLOCK_MONOTONIC_COARSE	CLOCK_MONOTONIC_FAST
84 #endif
85 
86 #if __BSD_VISIBLE
87 #define TIMER_RELTIME	0x0	/* relative timer */
88 #endif
89 #if __POSIX_VISIBLE >= 199309
90 #define TIMER_ABSTIME	0x1	/* absolute timer */
91 #endif /* __POSIX_VISIBLE >= 199309 */
92 
93 #endif /* _SYS_SYS__CLOCK_ID_H */
94