wangchdo opened a new pull request, #17644:
URL: https://github.com/apache/nuttx/pull/17644
## Summary
Signals in NuttX serve two primary purposes:
1. **Synchronization and wake-up**
Signals can be used to block threads on specific signal sets and later wake
them up by delivering the corresponding signals to those threads.
2. **Asynchronous notification**
Signals can also be used to register callback handlers for specific signals,
allowing threads to asynchronously invoke those handlers when the signals are
delivered.
The PR https://github.com/apache/nuttx/pull/17357
introduced the ability to disable only the synchronization and wake-up
functionality of signals, while retaining part of the signal infrastructure.
This allows moderate memory savings and performance improvements.
The PR https://github.com/apache/nuttx/pull/17352
introduced the ability to completely disable all signal functionality,
providing more aggressive memory reduction and performance optimization.
This PR consolidates the above two efforts and introduces a unified
mechanism that supports both:
1. **Partial signal disablement:** disabling only asynchronous notification
while retaining synchronization and wake-up functionality.
2. **Full signal disablement:** disabling both synchronization / wake-up and
asynchronous notification functionality.
This consolidation enables finer-grained control over signal usage, allowing
system integrators to better balance functionality, memory footprint, and
performance for different use cases.
## Impact
Provide configuration to fully or partially disable signals, should have no
impact to exist nuttx functions if
the configuration is not enabled
## Testing
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