This is meant as a substitute for sys_clock_timeout_end_calc()
Current sys_clock_timeout_end_calc() usage opens up many bug
possibilities due to the actual timeout evaluation's open-coded nature.
Issue ##50611 is one example.
- Some users store the returned value in a signed variable, others in
an unsigned one, making the comparison with UINT64_MAX (corresponding
to K_FOREVER) wrong in the signed case.
- Some users compute the difference and store that in a signed variable
to compare against 0 which still doesn't work with K_FOREVER. And when
this difference is used as a timeout argument then the K_FOREVER
nature of the timeout is lost.
- Some users complexify their code by special-casing K_NO_WAIT and
K_FOREVER inline which is bad for both code readability and binary
size.
Let's introduce a better abstraction to deal with absolute timepoints
with an opaque type to be used with a well-defined API.
The word "timeout" was avoided in the naming on purpose as the timeout
namespace is quite crowded already and it is preferable to make a
distinction between relative time periods (timeouts) and absolute time
values (timepoints).
A few stacks are also adjusted as they were too tight on X86.
Signed-off-by: Nicolas Pitre <npitre@baylibre.com>
With some of the recent work to disable unnecessary system
calls, there is a scenario where `z_impl_k_thread_stack_free()`
is not defined and an undefined symbol error occurs.
Safety was very concerned that dynamic thread stack code might
touch other code that does not malloc, so add a separate file
for the stack alloc and free stubs.
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
This allows for builds with CONFIG_SYS_CLOCK_EXISTS=n in which case
busy waits are achieved with a crude CPU loop. If ever accuracy is
needed even with such a configuration then implementing arch_busy_wait()
should be considered.
Signed-off-by: Nicolas Pitre <npitre@baylibre.com>
Since the rbtree is using as list because we no longer
can assume that the object pointer is the address of the
data field in the dynamic object struct, lets just use
the already existent dlist for tracking dynamic kernel
objects.
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
Fix the preference allocation logic. If pool is preferred but POOL_SIZE
is 0 or pool allocation fails, it fallbacks to heap allocation if it
is enabled.
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
Add support for dynamic thread stack objects. A new container
for this kernel object was added to avoid its alignment constraint
to all dynamic objects.
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
Add a new API to dynamically allocate kernel objects that allow
passing an arbitrary size. This new API allows to allocate dynamic
thread stack.
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
While the LOCKED pattern is universally useful it can be misused. This
change therefore exposes the LOCKED pattern with extensive usage
documentation to reduce the risk of abuse or unintended deadlock.
Signed-off-by: Florian Grandel <fgrandel@code-for-humans.de>
Update the return value of functions that modify the internal event
state from `void` to `uint32_t`, so that calling code can determine
whether the event was already in a given state, or if the call modified
it.
This simplifies the usage of `struct k_event` as an alternative to
`atomic_t` that users can block on.
Implements #57216
Signed-off-by: Jordan Yates <jordan.yates@data61.csiro.au>
Scheduling relative timeouts from within timer callbacks (=sys clock ISR
context) differs from scheduling relative timeouts from an application
context.
This change documents and explains the rationale of this distinction.
Signed-off-by: Florian Grandel <fgrandel@code-for-humans.de>
Device dependencies are not always required, so make them optional via
CONFIG_DEVICE_DEPS. When enabled, the gen_device_deps script will run so
that dependencies are collected and part of the final image. Related
APIs will be also made available. Since device dependencies are used in
just a few places (power domains), disable the feature by default. When
not enabled, a second linking pass will not be required.
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
The option can now be set by projects. This change will also allow to
make it dependent on a future CONFIG_DEVICE_DEPS option.
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
Rename the Kconfig option to be in line with recent renamings in device
handles/dependencies.
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
Rename struct device `handles` member to `deps`, in line with previous
renamings in the device API.
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
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>
Only set a cpu as active (on pm subsystem) when the cpu is effectively
initialized. We cannot assume on pm subsystem that all cpus were
initialized since when the option CONFIG_SMP_BOOT_DELAY is used cpus are
initialized on demand by the application.
Note that once cpus are properly initialized the subystem is able to track
their status.
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
