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posix: timers: deprecate CONFIG_POSIX_CLOCK and TIMER

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The POSIX_CLOCK option does not correspond to any standard
option. It was used to active features of several distinct
POSIX Options and Option Groups, which complicated API and
application configuration as a result.

POSIX_CLOCK is being deprecated in order to ensure that Zephyr's
POSIX Kconfig variables correspond to those defined in the
specification, as of IEEE 1003.1-2017.

Additionally, CONFIG_TIMER is being deprecated because it does
not match the corresponding POSIX Option (_POSIX_TIMERS).

With this deprecation, we introduce the following Kconfig
options that map directly to standard POSIX Option Groups by
simply removing "CONFIG_":

* CONFIG_POSIX_TIMERS

Similarly, we introduce the following Kconfig options that
map directly to standard POSIX Options by simply removing
"CONFIG":

* CONFIG_POSIX_CLOCK_SELECTION
* CONFIG_POSIX_CPUTIME
* CONFIG_POSIX_DELAYTIMER_MAX
* CONFIG_POSIX_MONOTONIC_CLOCK
* CONFIG_POSIX_TIMEOUTS
* CONFIG_POSIX_TIMER_MAX

In order to maintain parity with the current feature set, we
introduce the following Kconfig options that map directly to
standard POSIX Option Groups by simply removing "CONFIG_":

* CONFIG_POSIX_MULTI_PROCESS - sleep()

Similarly, in order to maintain parity with the current feature
set, we introduce the following additional Kconfig options that
map directly to standard POSIX Options by simply removing
"CONFIG":

* CONFIG_XSI_SINGLE_PROCESS - gettimeofday()

Signed-off-by: Chris Friedt <cfriedt@tenstorrent.com>
This commit is contained in:
Chris Friedt 2024-05-20 12:23:58 -04:00 • committed by David Leach
commit 4a5c4e5f73
36 changed files with 343 additions and 178 deletions
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16
lib/posix/options/Kconfig.xsi Normal file
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# Copyright (c) 2024 Tenstorrent AI ULC
#
# SPDX-License-Identifier: Apache-2.0
config XSI_SINGLE_PROCESS
bool "X/Open single process"
default y if POSIX_API
depends on POSIX_ENV
depends on POSIX_UNAME
depends on POSIX_CLOCK_SELECTION
help
Select 'y' here and Zephyr will provide implementations of
gethostid(), gettimeofday(), and putenv().
For more information, please see
https://pubs.opengroup.org/onlinepubs/9699919799/xrat/V4_subprofiles.html