d00131e154
Peter Wemm added the first CLOCK_* symbols in 0f5ed9f420 in 1997
after obtaining them from NetBSD. In NetBSD, jtc@netbsd.org committed
them in sys/sys/time.h rev 1.19 dated 1996/11/15, along with all the
system calls associated with 1003.1b. FreeBSD's values are, however,
different than NetBSD's today. The USL/UCB lawsuit was settled in 1994,
so these couldn't have been derived from material provided to University
of California covered in that settlement. This file does not need the
settlement disclaimer.
Furthermore, I rewrote most of the code (except the symbols and their
values) when merging it from time.h and sys/time.h. Most of the creative
content of the file is new, so update copyright to reflect that.
Reviewed by: kaktus
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D31369
94 lines
3.3 KiB
C
94 lines
3.3 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2021 Netflix, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _SYS_SYS__CLOCK_ID_H
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#define _SYS_SYS__CLOCK_ID_H
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/*
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* These macros are shared between time.h and sys/time.h.
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*/
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/*
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* Note: The values shown below as a comment for the __POSIX_VISIBLE values are
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* the ones FreeBSD traditionally used based on our reading of the POSIX
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* standards. However, glibc uses 199309 for all of them, even those many were
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* not defined there. To remain bug compatible with glibc means more software
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* that relied on the glibc behavior will compile easily on FreeBSD.
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*
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* Also, CLOCK_UPTIME_FAST is improperly visible temporarily for the lang/pocl
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* port until it can be updated properly. It incorrectly assumes that this was a
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* standard value. It will be moved back to the __BSD_VISIBLE section once the
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* issue is corrected.
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*/
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#if __POSIX_VISIBLE >= 199309 /* 199506 */
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#define CLOCK_REALTIME 0
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#endif /* __POSIX_VISIBLE >= 199309 */
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#ifdef __BSD_VISIBLE
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#define CLOCK_VIRTUAL 1
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#define CLOCK_PROF 2
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#endif /* __BSD_VISIBLE */
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#if __POSIX_VISIBLE >= 199309 /* 200112 */
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#define CLOCK_MONOTONIC 4
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#define CLOCK_UPTIME_FAST 8
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#endif /* __POSIX_VISIBLE >= 199309 */
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#ifdef __BSD_VISIBLE
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/*
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* FreeBSD-specific clocks.
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*/
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#define CLOCK_UPTIME 5
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#define CLOCK_UPTIME_PRECISE 7
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#define CLOCK_REALTIME_PRECISE 9
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#define CLOCK_REALTIME_FAST 10
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#define CLOCK_MONOTONIC_PRECISE 11
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#define CLOCK_MONOTONIC_FAST 12
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#define CLOCK_SECOND 13
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#endif /* __BSD_VISIBLE */
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#if __POSIX_VISIBLE >= 199309 /* 200112 */
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#define CLOCK_THREAD_CPUTIME_ID 14
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#define CLOCK_PROCESS_CPUTIME_ID 15
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#endif /* __POSIX_VISIBLE >= 199309 */
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/*
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* Linux compatible names.
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*/
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#if __BSD_VISIBLE
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#define CLOCK_BOOTTIME CLOCK_UPTIME
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#define CLOCK_REALTIME_COARSE CLOCK_REALTIME_FAST
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#define CLOCK_MONOTONIC_COARSE CLOCK_MONOTONIC_FAST
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#endif
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#if __BSD_VISIBLE
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#define TIMER_RELTIME 0x0 /* relative timer */
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#endif
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#if __POSIX_VISIBLE >= 199309
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#define TIMER_ABSTIME 0x1 /* absolute timer */
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#endif /* __POSIX_VISIBLE >= 199309 */
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#endif /* _SYS_SYS__CLOCK_ID_H */
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