Date: Sun, 12 Sep 2021 16:35:29 GMT From: Warner Losh <imp@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: 5918f4865267 - stable/13 - clock_gettime: Add Linux aliases for CLOCK_* Message-ID: <202109121635.18CGZTeo074192@gitrepo.freebsd.org>
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The branch stable/13 has been updated by imp: URL: https://cgit.FreeBSD.org/src/commit/?id=5918f486526733f011c7cd507e5859a5d70a1cfb commit 5918f486526733f011c7cd507e5859a5d70a1cfb Author: Warner Losh <imp@FreeBSD.org> AuthorDate: 2021-07-30 23:11:43 +0000 Commit: Warner Losh <imp@FreeBSD.org> CommitDate: 2021-09-12 15:56:16 +0000 clock_gettime: Add Linux aliases for CLOCK_* Linux standardized what we call CLOCK_{REALTIME,MONOTONIC}_FAST as CLOCK_{REALTIME,MONOTONIC}_COARSE. In addition, Linux spells CLOCK_UPTIME as CLOCK_BOOTTIME. Add aliases to time.h and document these new aliases in clock_gettime(2). Reviewed by: vangyzen, kib (prior), dchagin (prior) Sponsored by: Netflix Differential Revision: https://reviews.freebsd.org/D30988 (cherry picked from commit 155f15118a77d2aeab7b177ada78c848778d7d80) --- lib/libc/sys/clock_gettime.2 | 15 ++++++++++++++- sys/sys/_clock_id.h | 9 +++++++++ 2 files changed, 23 insertions(+), 1 deletion(-) diff --git a/lib/libc/sys/clock_gettime.2 b/lib/libc/sys/clock_gettime.2 index 6dca19449be9..12be3c321a75 100644 --- a/lib/libc/sys/clock_gettime.2 +++ b/lib/libc/sys/clock_gettime.2 @@ -29,7 +29,7 @@ .\" .\" $FreeBSD$ .\" -.Dd December 7, 2019 +.Dd July 30, 2021 .Dt CLOCK_GETTIME 2 .Os .Sh NAME @@ -68,14 +68,17 @@ as well as the following values: .It Dv CLOCK_REALTIME .It Dv CLOCK_REALTIME_PRECISE .It Dv CLOCK_REALTIME_FAST +.It Dv CLOCK_REALTIME_COARSE Increments as a wall clock should. .It Dv CLOCK_MONOTONIC .It Dv CLOCK_MONOTONIC_PRECISE .It Dv CLOCK_MONOTONIC_FAST +.It Dv CLOCK_MONOTONIC_COARSE Increments in SI seconds. .It Dv CLOCK_UPTIME .It Dv CLOCK_UPTIME_PRECISE .It Dv CLOCK_UPTIME_FAST +.It Dv CLOCK_BOOTTIME Starts at zero when the kernel boots and increments monotonically in SI seconds while the machine is running. .It Dv CLOCK_VIRTUAL @@ -104,6 +107,16 @@ Similarly, .Fa CLOCK_UPTIME_PRECISE are used to get the most exact value as possible, at the expense of execution time. +The clock IDs +.Fa CLOCK_REALTIME_COARSE , +.Fa CLOCK_MONOTONIC_COARSE +are aliases of corresponding IDs with _FAST suffix for compatibility with other +systems. +Finally, +.Dv CLOCK_BOOTTIME +is an alias for +.Dv CLOCK_UPTIME +for compatibility with other systems. .Pp The structure pointed to by .Fa tp diff --git a/sys/sys/_clock_id.h b/sys/sys/_clock_id.h index f0a25ce0f3f1..a88eb063122f 100644 --- a/sys/sys/_clock_id.h +++ b/sys/sys/_clock_id.h @@ -85,6 +85,15 @@ #define CLOCK_PROCESS_CPUTIME_ID 15 #endif /* __POSIX_VISIBLE >= 199309 */ +/* + * Linux compatible names. + */ +#if __BSD_VISIBLE +#define CLOCK_BOOTTIME CLOCK_UPTIME +#define CLOCK_REALTIME_COARSE CLOCK_REALTIME_FAST +#define CLOCK_MONOTONIC_COARSE CLOCK_MONOTONIC_FAST +#endif + #if __BSD_VISIBLE #define TIMER_RELTIME 0x0 /* relative timer */ #endif
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