src/include/time.h, branch release/13.2.0

time.h: reduce CLOCK_ namespace pollution, move to _clock_id.h

2021-09-12T15:56:16Z

Attempt to comply with the strict namespace pollution requirements of _POSIX_C_SOURCE. Add guards to limit visitbility of CLOCK_ and TIMER_ defines as appropriate. Only define the CLOCK_ variables relevant to the specific standards. Move all the sharing to sys/_clock_id.h and make time.h and sys/time.h both include that rather than copy due to the now large number of clocks and compat defines. Please note: The old time.h previously used these newer dates: CLOCK_REALTIME 199506 CLOCK_MONOTONIC 200112 CLOCK_THREAD_CPUTIME_ID 200112 CLOCK_PROCESS_CPUTIME_ID 200112 but glibc defines all of these for 199309. glibc uses this date for all these values, however, only CLOCK_REALTIME was in IEEE 1003.1b. Add a comment about this to document it. A large number of programs and libraries assume that these will be defined for _POSIX_C_SOURCE = 199309. In addition, leak CLOCK_UPTIME_FAST for the pocl package until it can be updated to use a simple CLOCK_MONOTONIC. Reviewed by: kib Sponsored by: Netflix Differential Revision: https://reviews.freebsd.org/D31056 (cherry picked from commit 7b797ba27a714594dac910035d857e653d566b19)

Make CLOCK_REALTIME and TIMER_ABSTIME available for XOPEN_SOURCE >= 500.

2020-07-14T20:23:27Z

Reported by: jbeich PR: 247701 Reviewed by: jilles Sponsored by: The FreeBSD Foundation MFC after: 1 week Differential revision: https://reviews.freebsd.org/D25554

Correctly check for C++17 and higher when declaring timespec_get()

2019-12-09T19:17:56Z

Summary: In rS338751, the check to declare `timespec_get()` for C++17 and higher was incorrectly done against a `cplusplus` define, while it should have been `__cplusplus`. Fix this by using `__cplusplus`, and also bump `__FreeBSD_version` so it becomes possible to correctly check for `timespec_get()` in upstream libc++ headers. Reviewed by: brooks, emaste MFC after: 3 days Differential Revision: https://reviews.freebsd.org/D22735

Fix C11 and POSIX 1003.1b-1993 compliance in time.h

2018-09-18T15:31:24Z

Only expose timespec_get in C11, C++17, or BSD code. Always define struct timespect if defining timespec_get. PR: 231425 Reviewed by: kib Approved by: re (gjb) Differential Revision: https://reviews.freebsd.org/D17174

Bring in timespce_get form NetBSD.

2018-08-10T15:16:30Z

Bring in the functionality for timespec_get from NetBSD. I've lightly edited the .c file to remove _DIAGASSERT because FreeBSD doesn't have that functionality and the typical #define'ing it to assert isn't right here. The man page is verbatim from NetBSD, but will be revised as part of a larger cleanup of the time man pages (they are inconsistent and vague in all the wrong places). Differential Review: https://reviews.freebsd.org/D16649

Add time2posix and posix2time to time.h

2018-05-25T13:40:05Z

These are documented in `time2posix.3` but the symbols are not actually visible. Since these are not POSIX hide them behind _BSD_VISIBLE. Reviewed by: wollman Differential Revision: https://reviews.freebsd.org/D15530

Do not include float interfaces when using libsa.

2018-02-23T04:04:25Z

We don't support float in the boot loaders, so don't include interfaces for float or double in systems headers. In addition, take the unusual step of spiking double and float to prevent any more accidental seepage.

include: further adoption of SPDX licensing ID tags.

2017-11-20T19:45:28Z

Mainly focus on files that use BSD 3-Clause license. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point.

Add clock_nanosleep()

2017-03-19T00:51:12Z

Add a clock_nanosleep() syscall, as specified by POSIX. Make nanosleep() a wrapper around it. Attach the clock_nanosleep test from NetBSD. Adjust it for the FreeBSD behavior of updating rmtp only when interrupted by a signal. I believe this to be POSIX-compliant, since POSIX mentions the rmtp parameter only in the paragraph about EINTR. This is also what Linux does. (NetBSD updates rmtp unconditionally.) Copy the whole nanosleep.2 man page from NetBSD because it is complete and closely resembles the POSIX description. Edit, polish, and reword it a bit, being sure to keep any relevant text from the FreeBSD page. Reviewed by: kib, ngie, jilles MFC after: 3 weeks Relnotes: yes Sponsored by: Dell EMC Differential Revision: https://reviews.freebsd.org/D10020

Export the mq_getfd_np() symbol from librt.so, which allows to get

2016-10-02T17:02:59Z

file descriptor for the given posix mqueue. Export the timer_oshandle_np() symbol to get ktimer id for the given posix timer. Requested by: Lewis Donzis Reviewed by: jilles Discussed with: kan Sponsored by: The FreeBSD Foundation MFC after: 1 week