jlaitine commented on code in PR #17263:
URL: https://github.com/apache/nuttx/pull/17263#discussion_r2479166476
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sched/signal/sig_dispatch.c:
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@@ -364,11 +364,10 @@ static irqstate_t nxsig_alloc_dyn_pending(irqstate_t
flags)
bool alloc_signal = sq_empty(&g_sigpendingsignal);
bool alloc_sigact = sq_empty(&g_sigpendingaction);
- /* Signals are not dispatched from the idle task */
+ /* We can't do memory allocations in idle task or interrupt */
- DEBUGASSERT(!sched_idletask());
-
- if (alloc_signal || alloc_sigact)
+ if ((alloc_signal || alloc_sigact) &&
+ !sched_idletask() && !up_interrupt_context())
Review Comment:
No, signal can be sent from the isr, just as before. There are the
preallocated structures for that purpose.
Only if it runs out of preallocated structures, it is not possible, and the
dispatch returns -EGAIN.
This is similar to what also linux does.
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