If `z_prio` is negative and we want to make sure that it is
within `[-CONFIG_NUM_COOP_PRIORITIES, -1]`, we should invert
its sign and make sure that it is `<=`
`CONFIG_NUM_COOP_PRIORITIES` instead of `<`.
Signed-off-by: Yong Cong Sin <ycsin@meta.com>
Added a top level `posix` shell command for other POSIX
commands. Currently only `uname` is supported.
New POSIX commands can be added by including the
`posix_shell.h` header and use the `POSIX_CMD_ADD` helper
macro.
Signed-off-by: Yong Cong Sin <ycsin@meta.com>
Relocate the `uname` shell implementation from uname sample, so
that it can be reused by other application and the uname sample
only uses POSIX APIs.
Signed-off-by: Yong Cong Sin <ycsin@meta.com>
The POSIX standard doesn't specify if the argument to store
previous state/type in
`pthread_setcancelstate`/`pthread_setcancelstate` can be
`NULL`, but threading implementations in Linux & Apache NuttX
permit the arguments to be `NULL`.
This commit changes Zephyr's implementation to mimic that of
Linux & NuttX, so that user do not get caught off-guard by
NULL pointer dereferencing when porting code over from those
OSes.
Updated test accordingly.
Signed-off-by: Yong Cong Sin <ycsin@meta.com>
Make sure that the POSIX clock base is reset after every
testsuite so that the initial time is the same for every test.
Signed-off-by: Yong Cong Sin <ycsin@meta.com>
Instead of relying on a fault occurring when NULL
parameters are passed in, explicitly check and return
EINVAL.
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
Initial implementation of `sched_getparam()` and `sched_getscheduler()`
POSIX APIs as a part of PSE53 `_POSIX_PRIORITY_SCHEDULING` option group.
Both functions are actually placeholders and just return `ENOSYS`
since Zephyr does not yet support processes or process scheduling.
Signed-off-by: Dmitrii Golovanov <dmitrii.golovanov@intel.com>
- Regroup refcount decrement and semaphore destruction by making the
linked state into a counted reference for it. This allows for
simplifying the code and cleanly adding a few assertions in a common
location.
- Remove redundant initialization to NULL on memory about to be freed
and local pointer in nsem_cleanup().
Signed-off-by: Nicolas Pitre <npitre@baylibre.com>
Improve a depends on the host libC.
It is technically correct, but NATIVE_LIBC
is shorter and clearer than "ARCH_POSIX && EXTERNAL_LIBC"
Signed-off-by: Alberto Escolar Piedras <alberto.escolar.piedras@nordicsemi.no>
Let's try to use the host unistd.h when building with
the host library only, instead of assuming
that the native boards are always built with it.
This fixes a build error when building for native boards
using minimal libc.
Signed-off-by: Alberto Escolar Piedras <alberto.escolar.piedras@nordicsemi.no>
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>
The clock_settime() function should not accept an input timespec
with nanosecond values < 0 or >= NSEC_PER_SEC.
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
This makes sure the heap posix_timer_slab provides objects aligned
compatible with the type timer_obj. It was previously set to align at 4
bytes. One example where this failed was on the SPARC which requires
access to int64_t to be 8-byte aligned.
In particular, struct timer_obj contains fields of type k_timer_t and
struct _timeout.
With this commit we now get the information on required alignment for
struct timer_obj from the compiler by using __alignof__().
Signed-off-by: Martin Åberg <martin.aberg@gaisler.com>
There was some discussion about whether it was suitable to have
an architecture-specific workaround in mqueue.c after that
workaround was copied to a different source file in a PR.
The original issue was that newlib and picolibc declare mode_t
to be unsigned short instead of unsigned long when __svr4__
is not defined along with __sparc__. This is specifically
impactful, because va_arg() deals (mainly) with 32-bit and
64-bit values that are all naturally aligned to 4 bytes.
#if defined(__sparc__) && !defined(__sparc_v9__)
#ifdef __svr4__
typedef unsigned long __mode_t;
#else
typedef unsigned short __mode_t;
#endif
A uint16_t is naturally aligned to 2 bytes, so not only would
a 16-bit mode_t be corrupted, it would also generate a warning
with recent gcc versions which is promoted to error (rightfully
so) when run through CI.
mqueue.c:61:35: error: 'mode_t' {aka 'short unsigned int'} is
promoted to 'int' when passed through '...' [-Werror]
61 | mode = va_arg(va, mode_t);
Instead of using an architecture-specific workaround, simply
add a build assert that the size of mode_t is less than or
equal to the size of an int, and use an int to retrieve it
via va_arg().
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
# Please enter the commit message for your changes. Lines starting
# with '#' will be kept; you may remove them yourself if you want to.
# An empty message aborts the commit.
#
# Date: Fri Dec 29 10:06:44 2023 -0500
#
# On branch posix-mqueue-always-use-int-for-mode-t-va-arg
# Changes to be committed:
# modified: lib/posix/mqueue.c
# modified: tests/posix/common/testcase.yaml
#
Use the __fallthrough directive on the switch fallthrough case and drop
the comment instead. This informs the compiler that the fallthrough is
intentional and silence any possible warning about it.
Drop the not reached case as I think that that part can actually be
reached since there are breaks in some of the cases.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
* remove unneeded line of code that duplicated the first part
of the SYS_SLIST_FOR_EACH_NODE() expansion.
* return NULL if pthread_self() is not a valid pthread
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
A previous size optimization capped the pthread_attr_t stacksize
property at 65536. Some Zephyr users felt that was not large
enough for specific use cases.
Modify struct pthread_attr to support large stack sizes by
default with the flexibility to allow users to vary the number
of bits used for both stacksizes and guardsizes.
The default guardsize remains zero sinze Zephyr's stack
allocators already pad stacks with a guard area based on other
config parameters, and since Zephyr is already designed to
support both SW and HW stack protection at the kernel layer.
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
Implement pthread_getguardsize() and pthread_setguardsize().
pthread_getguardsize() and pthread_setguardsize() are required
by the POSIX_THREADS_EXT Option Group as detailed in Section
E.1 of IEEE-1003.1-2017. However, they were formerly part of
XSI_THREADS_EXT.
The XSI_THREADS_EXT Option Group was required for PSE51, PSE52,
PSE53, and PSE54 conformance.
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
This change reduces the space occupied by struct pthread_attr
which is the internal type used for pthread_attr_t.
We cap the stack size at 16 bits (so up to 65536 bytes) and
since a stack size of 0 is invalid, we can encode the stack
size by simply subtracting 1 or adding 1 when setting or
getting.
The schedpolicy is capped at 2 bits and initialized,
cancellable, and detached are given 1 bit.
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
Use the new HEAP_MEM_POOL_ADD_SIZE_ prefix to construct a minimum
requirement for posix message queue usage. This way we can remove the
"special case" default values from the HEAP_MEM_POOL_SIZE Kconfig
definition.
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Since pthread_once() is both the initializer and executor of
pthread_once_t, it can have maximally two states. Since the
implementation in Zephyr previously aimed to maximize libc
compatibility, we opted to use the definition of pthread_once_t
from newlib, which is a structure with two ints.
It does not make sense to use 64 bits to manage 2 possible
states. The control for that should effectively be a bool.
We maintain compatibility with newlib by asserting (at build
time), that newlib's pthread_once_t is larger than Zephyr's
new struct pthread_once (which just contains a bool).
This allows us to delete the non-standard pthread_key.h
header file (finally).
Reuse the pthread_pool_lock in order to synchronize the related
init function (so that it is only called maximally once from any
thread). The spinlock is only used to test the state and the
init function is not called with the spinlock held.
The alternative was to use an atomic inside of
struct pthread_once. But again, that could be up to 64-bits with
Zephyr's atomics implementation.
Ideally we would use C11 generics or something to support atomics
on 8, 16, 32, and 64-bit primitives.
Lastly, also update declarations for C11 threads as they mostly
mirror our pthread implementation.
This needed to be done as a single commit in order to ensure
continuity of build.
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
pthread_sigmask() is required by the POSIX_THREADS_BASE
Option Group as detailed in Section E.1 of IEEE-1003.1-2017.
The POSIX_THREADS_BASE 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.
Currently, setting a pthread signal mask has no effect.
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
When CONFIG_POSIX_SIGNAL=n, default CONFIG_POSIX_RTSIG_MAX to
0 so that the `sigset_t` type can be defined.
Also define RTSIG_MAX.
This allows native_sim and other platforms to build without
error.
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
To align with other supported POSIX features, add logging to
pthread key to provide better error reporting and diagnostics.
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
pthread_cleanup_push() and pthread_cleanup_pop() are required
by the POSIX_THREADS_BASE Option Group as detailed in Section
E.1 of IEEE-1003.1-2017.
The POSIX_THREADS_BASE 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.
In this change, we require the addition of a dedicated
pthread_key_t that will not be available for applilcation usage.
Rather than including that as part of
CONFIG_MAX_PTHREAD_KEY_COUNT, we increase the storage by 1 in
order to be least invasive from the application perspective.
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
Initialize the variable to zero. I don't think there is any way
out of this function without it being initialized, so IMHO it's
a false positive.
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
Zephyr must support all functionality of the XSI_THREADS_EXT
subprofiling option group in order to claim it supports that
subprofiling option group.
The XSI_THREADS_EXT option group is critical to be able to
run POSIX threads with statically allocated thread stacks, which
has been a feature of the implementation since it was initially
added.
The pthread_getconcurrency() and pthread_setconcurrency()
functions are the only remaining, unimplemented functions of
the XSI_THREADS_EXT option group.
Implement pthread_getconcurrency() and pthread_setconcurrency()
via the more "posixly correct" interpretation of the
specification.
I.e. as the pthread_t:k_thread relationship is 1:1 and not M:N,
Zephyr does not support multiplexing of user threads on top of
schedulable kernel entities (i.e. "user threads" are directly
mapped to native threads, just like linuxthreads or NPTL are in
Linux).
For that reason, to be "posixly correct", we should save the
provided value via pthread_setconcurrency(), in the absense of
errors, and also return that same value back via
pthread_getconcurrency(), even though that serves zero purpose
in Zephyr for the foreseeable future.
Note: the specification also states
"an implementation can always ignore any calls to
pthread_setconcurrency() and return a constant for
pthread_getconcurrency()."
For that reason, the implementation may be revisited at a later
time when when considering optimizations and when there is a
better system in place for documenting deviations.
Any such optimization should be explicitly controlled via
Kconfig.
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
pthread_setcanceltype() is required by the POSIX_THREADS_BASE
Option Group as detailed in Section E.1 of IEEE-1003.1-2017.
The POSIX_THREADS_BASE 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.
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
_PTHREAD_CANCEL_POS is an implementation detail and should not
be defined in the global scope. Furthermore, _PTHREAD_CANCEL_POS
uses a reserved identifier (underscore followed by capital
letter).
Adjust definitions so that the implementation detail is only
used in the implementation and not in the interface.
Additionally, modify naming so that the non-standard macro does
not use a reserved identifier.
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
* "identity" functions grouped more closely
* posix_thread_pool_init() should be adjacent to the SYS_INIT()
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
Previously, `pthread_key_delete()` was only ever deleting key 0
rather than the key corresponding to the provided argument.
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
pthread_atfork() is required by the POSIX_THREADS_BASE
Option Group as detailed in Section E.1 of IEEE-1003.1-2017.
The POSIX_THREADS_BASE 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.
Since Zephyr does not yet support processes and (by extension)
fork(), this implementation includes a deviation and should be
categorized as producing undefined behaviour.
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
Move the syscall_handler.h header, used internally only to a dedicated
internal folder that should not be used outside of Zephyr.
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
Moving the Zephyr specific config options from
modules/hostap/Kconfig to corresponding Kconfig where the
option is specified.
Signed-off-by: Jukka Rissanen <jukka.rissanen@nordicsemi.no>
POSIX clock cannot be used with the host libC
when building with the POSIX architecture.
Let's ensure it via kconfig.
Signed-off-by: Alberto Escolar Piedras <alberto.escolar.piedras@nordicsemi.no>
Compiler can't tell that k_thread_abort() won't return and issues a
warning unless we tell it that control never gets this far.
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
add support for the sigev_thread flag in zephyr timer posix api following
the behaviour described in the linux man page. with this enhancement,
a single thread is created to receive all notifications from timers
Signed-off-by: Arunmani Alagarsamy <arunmani@linumiz.com>
Previously it was not possible to n-select e.g.
CONFIG_PTHREAD_BARRIER because the Kconfig template for it
lacked a prompt. This made it impossible to disable some
unused POSIX features and unnecessarily increased code size
if unused code sections were not discarded by the linker.
Add a prompt so that each pooled IPC type is
user-configurable and can be disabled if unneeded.
Further, ensure that only the selected sources from lib/posix
are included in the cmake build.
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
to_posix_mutex allocates a mutex which will race to change the value of
the lock, thus to_posix_mutex should be performed under the spinlock to
prevent the racy issue.
Signed-off-by: Jaxson Han <jaxson.han@arm.com>
Log modules should be registered with LOG_MODULE_REGISTER
rather than LOG_MODULE_DECLARE. It seems the latter works
on most platforms (at least with in minimal mode as configured
with ZTest).
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
Support logging for all POSIX pooled resource types such as
pthread_t, pthread_mutex_t, and pthread_cond_t.
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
If `pthread_exit()` is called from a `k_thread`, then we would
previously trigger an assertion. The problem with that, is that
is POSIX is acting as a compatibility layer.
Given that it is a reasonable expectation to have the calling
thread exit or abort when calling `pthread_exit()`, lets do just
that.
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
Modify the signature of the k_mem_slab_free() function with a new one,
replacing the old void **mem with void *mem as a parameter.
The following function:
void k_mem_slab_free(struct k_mem_slab *slab, void **mem);
has the wrong signature. mem is only used as a regular pointer, so there
is no need to use a double-pointer. The correct signature should be:
void k_mem_slab_free(struct k_mem_slab *slab, void *mem);
The issue with the current signature, although functional, is that it is
extremely confusing. I myself, a veteran Zephyr developer, was confused
by this parameter when looking at it recently.
All in-tree uses of the function have been adapted.
Fixes#61888.
Signed-off-by: Carles Cufi <carles.cufi@nordicsemi.no>
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>
* `struct sigevent` is not type-defined
* `union sigval` is not type-defined
* `struct sigevent` must include `sigev_notify_attributes`
For more information, see https://bit.ly/3YfnELI
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
extends the char buffer in the strsignal function to cover the
entire range of `int`
Had to use `-INT_MAX` as the compiler resolves
```
STRINGIFY(INT_MIN)
```
to:
```
(-2147483647 - 1)
```
instead of:
```
-2147483648
```
Signed-off-by: Yong Cong Sin <ycsin@meta.com>
The normative spec for `pthread_mutex_timedlock()` says that
it should return `ETIMEDOUT` when a timeout occurs. However,
currently it returns `EAGAIN`, which reflects what is returned
by `k_mutex_lock()`.
Inspect and update the return value to account for this slight
difference.
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
Ensure that the thread return value is set by `pthread_join()`
when `status` is non-NULL.
Additionally, we have an opportunity to synchronously clean
up thread stacks in `pthread_join()`, which is preferable.
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
Discovered this while implementing c11 threads, but there
was a regression recently that made it so that `pthread_join()`
would report success when attempting to join a thread that had
been detached with `pthread_detach()`.
Technically now that is undefined behaviour, but historically,
we have reported `EINVAL`, which was the older specified
return value.
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
This change allows users to call pthread_create() with
the pthread_attr_t argument equal to NULL.
If Zephyr is configured with `CONFIG_DYNAMIC_THREAD`, then a
suitable thread stack will be allocated via
k_thread_stack_alloc(). The allocated thread stack is
automatically freed via k_thread_stack_free().
This makes the Zephyr implementation of pthread_create()
compliant with the normative spec.
Signed-off-by: Christopher Friedt <chrisfriedt@gmail.com>
Since the argument is a 32-bit unsigned int, all possible
values satisfy the condition that intval < UINT64_MAX - 1.
Remove the redundant conditional.
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
Multiple reader threads unlocking the read lock simultaneously might
cause the program hang because it's possible that no thread is
identified as the last one to active the writer thread.
To fix the issue, swap the k_sem_give sequence.
Signed-off-by: Jaxson Han <jaxson.han@arm.com>
The `pthread_once_lock` `k_mutex` is statically initialized and
only visible within file scope. Coverity identified it as unsafe
because the return values of `pthread_mutex_lock()` and
`pthread_mutex_unlock()` were unchecked. However, if those
functions were to fail here, it would be indicative that
something far worse has happened.
In any case, we add assertions that these functions
succeed rather than silently ignoring with `(void)`, which
ensures that we have coverage when assertions are enabled,
in test, while removing unneeded code with assertions disable,
in production.
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
The `struct k_spinlock` size is zero bytes under certain
circumstances. This is a bit of a problem, because it breaks a
number of assumptions about things in C.
That should be fixed when #59922 is addressed.
This change is just a hotfix to correct the specific condition
where we will need workarounds in other source files.
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
This change is setting up for switching over to proper POSIX
option requirements, feature test macros, and a dependency
structure that is reflective of the standard.
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
Most of the posix source files can be easily identified by a
short name. I.e. most of the `pthread_` prefixed files do not
need the `pthread_` prefix.
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
A significant enough portion of these files has been
changed to justify adding Meta copyright as well as
that of the original author.
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
Fixes#58911. Previously the stat command returned
information on the filesystem, but not the file itself.
Because block size is still set this function is
backwards compatible with the previous faulty
behavior.
Signed-off-by: Vincent van Beveren <v.van.beveren@nikhef.nl>
The POSIX API compatibility shim can be used for some
of the POSIX ARCH targets.
Narrow the Kconfig filtering accordingly.
Note that the recommended configuration when building
with the native simulator is still to use an embedded
C library. Using the host C library will in some cases
cause undesired behaviour.
Signed-off-by: Alberto Escolar Piedras <alberto.escolar.piedras@nordicsemi.no>
Fix a regression introduced by commit e6eb0a705b ("posix: eventfd: revise
locking, signaling, and allocation"), which was a complete rewrite stating
that:
The `wait_q` and `k_poll_signal` entries were removed from
`struct eventfd` as they were unnecessary.
In fact, `k_poll_signal` (both `read_sig` and `write_sig`) were used to
wake-up blocking `poll()` invocation in another thread. This is no longer
the case now, i.e. `poll(..., POLLIN)` does not return after calling
`eventfd_write()` on the observed (polled) FD.
Fix this regression by bringing back `read_sig` and `write_sig` to very
similar state as it was before.
Fixes: e6eb0a705b ("posix: eventfd: revise locking, signaling, and
allocation")
Signed-off-by: Marcin Niestroj <m.niestroj@emb.dev>
This adds a few line use zephyr_syscall_header() to include
headers containing syscall function prototypes.
Signed-off-by: Daniel Leung <daniel.leung@intel.com>
Previously, the `posix_internal.h` header needed to be exposed
to the application because we had non-trivial details for
most posix types (pthread, mutex, cond, ...). Since most of
those have been simplified to a typedef'ed integer, we
no longer need to expose that header to the applicaiton.
Additionally, it means that we can adopt normalized
header order in posix.
Additionally, keep more implementation details hidden
and prefer the static keyword on internal symbols where
possible.
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
To enable testing, introduce `CONFIG_PTHREAD_CREATE_BARRIER`.
Some observations were made that running several Qemu SMP targets
concurrently could lead to synchronization problems. On such
targets, it was found that the synchronization issues were
mitigated by introducing a `pthread_barrier_t` shared between
`pthread_create()` and the spawned thread.
It is suggested to enable the option when running many
SMP tests concurrently in several parallel Qemu processes,
e.g. with `twister`.
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
Previously, pthreads suffered from some race conditions.
This was almost inevitable given that it was maintained in
parallel to Zephyr's threading and synchronization API.
The unfortunate side-effect of with that is that it did not
receive the reliability and other improvements that
`k_thread`s did.
Here, we perform a significant update of pthread code so
that it depends directly on public Zephyr API. With that,
we reuse as many concepts as possible and pthreads benefits for
free from any improvement made to Zephyr's threading and
synchronization APIs.
Included with this change, we
* implement state with `ready_q`, `run_q`, and `done_q`
* use `pthread_barrier_wait()` to sync `pthread_create()`
* synchronize internal state with a spinlock
These pthreads are considerably more reliable than
before.
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
The internal representation of `pthread_cond_t`,
`struct posix_cond`, is an identical clone of `struct k_condvar`
but without the benefit of being able to use all of the
existing `k_condvar_*()` suite of functions.
The first step in the right direction was switching
the external representation of `pthread_cond_t` to a simple
`int`. Let's take the next step in the right direction, which
is getting rid of `struct posix_cond`.
For now, let's keep this change as a simple type
substitution. Eventually, we should be able to fully switch
to Zephyr API internally.
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
The internal representation of `pthread_mutex_t`,
`struct posix_mutex`, is basically a clone of `struct k_mutex`
but without the benefit of being able to use all of the
existing `k_mutex_*()` suite of functions.
The first step in the right direction was switching
the external representation of `pthread_mutex_t` to a simple
`int`. Let's take the next step in the right direction, which
is getting rid of `struct posix_mutex`.
The only significant difference between `struct k_mutex` and
`struct posix_mutex` is that the latter needs a `type` field.
Since there were a fixed number of `struct posix_mutex`, we
can just externalize the `type` field and reuse
`struct k_mutex` as-is.
For now, let's keep this change as a simple type
substitution. Eventually, we should be able to fully switch
to Zephyr API internally.
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
Previously pthread_barrier_t was implemented in terms of wait
queues and internal scheduler functions.
This introduced some obstacles and inconsistency. In order
to be more consistent, rely only on Zephyr's public API and
reuse as many concepts as possible.
Deprecate `PTHREAD_BARRIER_DEFINE()` since it's non-standard.
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
