Implement the handle-based create, queue, priority, cancellation, and
teardown APIs for CONFIG_LIBC_USRWORK. Custom queues use configurable
pthread worker pools while the predefined USRWORK queue remains available.
Match scheduler-backend delay, replacement, cancellation, and lifecycle
semantics. Restrict the libc backend to task context because it uses
blocking synchronization.
Tested on an STM32H7 PX4 FMUv6C with ostest wqueue in Protected user space.
Assisted-by: Codex:GPT-5
Signed-off-by: DuoYuWang <thirteenking.wang@gmail.com>
In NuttX, the dq and the list are two different implementations of the double-linked list. Comparing to the dq, the list implementation has less branch conditions such as checking whether the head or tail is NULL. In theory and practice, the list is more friendly to the CPU pipeline. This commit changed the dq to the list in the wqueue implementation.
Signed-off-by: ouyangxiangzhen <ouyangxiangzhen@xiaomi.com>
Most tools used for compliance and SBOM generation use SPDX identifiers
This change brings us a step closer to an easy SBOM generation.
Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
Squashed commit of the following:
libs/libxx: Fix some confusing in naming. If the directory is called libxx, then the library must be libxx.a (unless perhaps LIBCXX is selected).
libs/: Fix paths in moved library directories.
libs: Brute force move of libc, libnx, and libxx to libs. Cannot yet build it in that configuration.
