GUIDINGLI commented on a change in pull request #4782:
URL: https://github.com/apache/incubator-nuttx/pull/4782#discussion_r748350090
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File path: sched/semaphore/sem_trywait.c
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@@ -69,10 +69,6 @@ int nxsem_trywait(FAR sem_t *sem)
irqstate_t flags;
int ret;
- /* This API should not be called from interrupt handlers */
Review comment:
Then, there is one question, why user can't call `nxsem_trywait` from
interrupt context ?
There is no harmful, even on SMP mode.
`nxsem_trywait` only look at the sem count, it will NOT wait at all.
If someone use `nxsem_trywait`, and `nxsem_post` before the IRQ exit, that's
the normal thing I think.
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