Add extern "C" to support linking userspace RCU library with C++ applications

[urcu.git] / urcu-qsbr.h

diff --git a/urcu-qsbr.h b/urcu-qsbr.h
index 346f906202aa60edc8f5c77628e18af5f130361a..8e6f1e463a7907075e1c76d4a6df370533e0b268 100644 (file)
--- a/urcu-qsbr.h
+++ b/urcu-qsbr.h
@@ -31,6 +31,15 @@
 #include <stdlib.h>
 #include <pthread.h>
 
+/*
+ * See urcu-pointer.h and urcu-pointer-static.h for pointer publication headers.
+ */
+#include <urcu-pointer.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif 
+
 /*
  * Important !
  *
@@ -48,17 +57,20 @@
  * Should only be used in LGPL-compatible code.
  */
 
-#define rcu_dereference                _rcu_dereference
-#define rcu_read_lock          _rcu_read_lock
-#define rcu_read_unlock                _rcu_read_unlock
-
-#define rcu_quiescent_state    _rcu_quiescent_state
-#define rcu_thread_offline     _rcu_thread_offline
-#define rcu_thread_online      _rcu_thread_online
+/*
+ * rcu_read_lock()
+ * rcu_read_unlock()
+ *
+ * Mark the beginning and end of a read-side critical section.
+ * DON'T FORGET TO USE RCU_REGISTER/UNREGISTER_THREAD() FOR EACH THREAD WITH
+ * READ-SIDE CRITICAL SECTION.
+ */
+#define rcu_read_lock()                _rcu_read_lock()
+#define rcu_read_unlock()      _rcu_read_unlock()
 
-#define rcu_assign_pointer     _rcu_assign_pointer
-#define rcu_xchg_pointer       _rcu_xchg_pointer
-#define rcu_publish_content    _rcu_publish_content
+#define rcu_quiescent_state()  _rcu_quiescent_state()
+#define rcu_thread_offline()   _rcu_thread_offline()
+#define rcu_thread_online()    _rcu_thread_online()
 
 #else /* !_LGPL_SOURCE */
 
@@ -92,29 +104,10 @@ extern void rcu_read_unlock(void);
 
 #endif /* !URCU_DEBUG */
 
-extern void *rcu_dereference(void *p);
-
 extern void rcu_quiescent_state(void);
 extern void rcu_thread_offline(void);
 extern void rcu_thread_online(void);
 
-extern void *rcu_assign_pointer_sym(void **p, void *v);
-
-#define rcu_assign_pointer(p, v)                       \
-       rcu_assign_pointer_sym((void **)(p), (v))
-
-extern void *rcu_cmpxchg_pointer_sym(void **p, void *old, void *_new);
-#define rcu_cmpxchg_pointer(p, old, _new)              \
-       rcu_cmpxchg_pointer_sym((void **)(p), (old), (_new))
-
-extern void *rcu_xchg_pointer_sym(void **p, void *v);
-#define rcu_xchg_pointer(p, v)                         \
-       rcu_xchg_pointer_sym((void **)(p), (v))
-
-extern void *rcu_publish_content_sym(void **p, void *v);
-#define rcu_publish_content(p, v)                      \
-       rcu_publish_content_sym((void **)(p), (v))
-
 #endif /* !_LGPL_SOURCE */
 
 extern void synchronize_rcu(void);
@@ -125,4 +118,8 @@ extern void synchronize_rcu(void);
 extern void rcu_register_thread(void);
 extern void rcu_unregister_thread(void);
 
+#ifdef __cplusplus 
+}
+#endif
+
 #endif /* _URCU_QSBR_H */