X-Git-Url: https://git.liburcu.org/?p=urcu.git;a=blobdiff_plain;f=urcu%2Fstatic%2Furcu-bp.h;h=2f365206afad6db4c561654109def617ef559ce5;hp=c7f532640e3c0feab165cb5a699c4c3760df011d;hb=882f335739b978d1c55be2faeed077f315afe5d7;hpb=171ff3a34ac166a41a075749517fd3780df121da

diff --git a/urcu/static/urcu-bp.h b/urcu/static/urcu-bp.h
index c7f5326..2f36520 100644
--- a/urcu/static/urcu-bp.h
+++ b/urcu/static/urcu-bp.h
@@ -223,6 +223,20 @@ static inline void _rcu_read_unlock(void)
 	cmm_barrier();	/* Ensure the compiler does not reorder us with mutex */
 }
 
+/*
+ * Returns whether within a RCU read-side critical section.
+ *
+ * This function is less than 10 lines long.  The intent is that this
+ * function meets the 10-line criterion for LGPL, allowing this function
+ * to be invoked directly from non-LGPL code.
+ */
+static inline int _rcu_read_ongoing(void)
+{
+	if (caa_unlikely(!URCU_TLS(rcu_reader)))
+		rcu_bp_register(); /* If not yet registered. */
+	return URCU_TLS(rcu_reader)->ctr & RCU_GP_CTR_NEST_MASK;
+}
+
 #ifdef __cplusplus 
 }
 #endif