X-Git-Url: https://git.liburcu.org/?p=urcu.git;a=blobdiff_plain;f=urcu-qsbr.h;fp=urcu-qsbr.h;h=9a2c82f4b1e503155de664a545c8c5e5697c5608;hp=1dc4ddd6d27a0a59a810c5c7652e984374a0ac91;hb=727f819de5737f4be5b9f7e50aacf84c7a3f7999;hpb=256dd999d11736ebe5ad2865219879199c89cc90

diff --git a/urcu-qsbr.h b/urcu-qsbr.h
index 1dc4ddd..9a2c82f 100644
--- a/urcu-qsbr.h
+++ b/urcu-qsbr.h
@@ -66,9 +66,32 @@
  * library wrappers to be used by non-LGPL compatible source code.
  */
 
+/*
+ * QSBR read lock/unlock are guaranteed to be no-ops. Therefore, we expose them
+ * in the LGPL header for any code to use. However, the debug version is not
+ * nops and may contain sanity checks. To activate it, applications must be
+ * recompiled with -DURCU_DEBUG (even non-LGPL/GPL applications). This is the
+ * best trade-off between license/performance/code triviality and
+ * library debugging & tracing features we could come up with.
+ */
+
+#if (!defined(BUILD_QSBR_LIB) && defined(URCU_DEBUG))
+
+static inline void rcu_read_lock(void)
+{
+}
+
+static inline void rcu_read_lock(void)
+{
+}
+
+#else /* !URCU_DEBUG */
+
 extern void rcu_read_lock(void);
 extern void rcu_read_unlock(void);
 
+#endif /* !URCU_DEBUG */
+
 extern void *rcu_dereference(void *p);
 
 extern void rcu_quiescent_state(void);