v01d opened a new issue #3347:
URL: https://github.com/apache/incubator-nuttx/issues/3347
```
Description: Implementation of support for SIGEV_THREAD is available
only in the FLAT build mode because it uses the OS work
queues to
perform the callback. The alternative for the PROTECTED and
KERNEL
builds would be to create pthreads in the user space to
perform the
callbacks. That is not a very attractive solution due to
performance
issues. It would also require some additional logic to
specify the
TCB of the parent so that the pthread could be bound to the
correct
group.
There is also some user-space logic in
libs/libc/aio/lio_listio.c.
That logic could use the user-space work queue for the
callbacks.
Status: Low, there are alternative designs. However, these features
are required by the POSIX standard.
Priority: Low for now
```
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