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>
clock_getres() is required by the POSIX_TIMERS Option Group
as detailed in Section E.1 of IEEE-1003.1-2017.
The POSIX_TIMERS Option Group is required for PSE51, PSE52,
PSE53, and PSE54 conformance, and is otherwise mandatory for
any POSIX conforming system as per Section A.2.1.3 of
IEEE-1003-1.2017.
With this, we have complete support for the POSIX_TIMERS
Option Group.
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
We try to implement Zephyr's POSIX API as regular library
functions, so remove the __syscall annotation from
clock_gettime() and implement the syscall portion of it under
the hood.
This also adds a bit of a micro-optimization in that
we can do a lot of processing outside of the system call.
In fact, processing CLOCK_MONOTONIC likely does not
require any syscall other than k_uptime_ticks().
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
Implements the posix clock_nanosleep function, where both relative
and absolute sleeps are made as absolute sleeps.
The nanosleep() function is a special case of clock_nanosleep(),
and so has been refactored to simply call it.
Signed-off-by: Tom Finet <tom.codeninja@gmail.com>
Include the host timespec only if we are building with
the host library for the POSIX architecture.
Signed-off-by: Alberto Escolar Piedras <alberto.escolar.piedras@nordicsemi.no>
NSEC_PER_MSEC should be defined along with the rest of the
per-sec macros in sys_clock.h. Currently, it's defined
multiply in a few separate locations.
Signed-off-by: Christopher Friedt <cfriedt@fb.com>
In order to bring consistency in-tree, migrate all includes within
include directory to the new prefix <zephyr/...>. Note that the
conversion has been scripted, refer to zephyrproject-rtos#45388 for more
details.
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
Move include paths and add new target_include_directories to support
backwards compatibility:
* /include -> /include/zephyr
example: <irq.h> -> <zephyr/irq.h>
Issue #41543
Signed-off-by: Yuval Peress <peress@google.com>
