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-rw-r--r--nuttx/sched/pthread_mutexunlock.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/nuttx/sched/pthread_mutexunlock.c b/nuttx/sched/pthread_mutexunlock.c
index f01f7761eb..4551c729fc 100644
--- a/nuttx/sched/pthread_mutexunlock.c
+++ b/nuttx/sched/pthread_mutexunlock.c
@@ -75,6 +75,10 @@
* Description:
* Unlock a mutex.
*
+ * If a signal is delivered to a thread waiting for a mutex, upon return from
+ * the signal handler the thread resumes waiting for the mutex as if it was
+ * not interrupted.
+ *
* Parameters:
* None
*