JianyuWang0623 opened a new pull request, #3064:
URL: https://github.com/apache/nuttx-apps/pull/3064
## Summary
Configured loop function with `UORB_LOOP_MAX_EVENTS`, added eventfd for loop
exit notification, fixed orb_loop_s undeclared error, and included API for
sending loop exit event. We can exit the loop by calling the new API
`orb_loop_exit_async()`.
1. Using `UORB_LOOP_MAX_EVENTS` to config loop function
2. Add eventfd to notify loop exit
3. Fix orb_loop_s undeclared error
4. Add API for sending loop exit event
## Impact
- system/uorb/uORB: Add new API `orb_loop_exit_async()`
```diff
+/****************************************************************************
+ * Name: orb_loop_exit_async
+ *
+ * Description:
+ * Send exit event to the current loop(not wait).
+ *
+ * Input Parameters:
+ * loop orb loop contains multiple handles.
+ *
+ * Returned Value:
+ * Zero (OK) on success; a -1 (ERROR) or negated errno value on failure.
+
****************************************************************************/
+
+int orb_loop_exit_async(FAR struct orb_loop_s *loop);
```
## Testing
1. Selftest
- The main thread
```
orb_loop_init(&mLoop, orb_loop_type_e::ORB_EPOLL_TYPE);
// ... ...
if (orb_loop_exit_async(&mLoop) == 0) {
mThread.join();
}
```
- The uORB loop thread
```
mThread= std::thread([=]() {
if (orb_loop_run(&mLoop) < 0) {
// error ...
}
orb_loop_deinit(&mLoop);
});
```
2. CI
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