Change API

[urcu.git] / urcu.h

diff --git a/urcu.h b/urcu.h
index 9431da547bfcc8245d07969de426ac33c7fe3d2d..b6b5c7b039e359225d947afb91a29a2f25ba6a3c 100644 (file)
--- a/urcu.h
+++ b/urcu.h
@@ -77,33 +77,29 @@ static inline int get_urcu_qparity(void)
 }
 
 /*
- * returns urcu_parity.
+ * urcu_parity should be declared on the caller's stack.
  */
-static inline int rcu_read_lock(void)
+static inline void rcu_read_lock(int *urcu_parity)
 {
-       int urcu_parity = get_urcu_qparity();
-       urcu_active_readers[urcu_parity]++;
+       *urcu_parity = get_urcu_qparity();
+       urcu_active_readers[*urcu_parity]++;
        /*
         * Increment active readers count before accessing the pointer.
         * See force_mb_all_threads().
         */
        barrier();
-       return urcu_parity;
 }
 
-static inline void rcu_read_unlock(int urcu_parity)
+static inline void rcu_read_unlock(int *urcu_parity)
 {
        barrier();
        /*
         * Finish using rcu before decrementing the pointer.
         * See force_mb_all_threads().
         */
-       urcu_active_readers[urcu_parity]--;
+       urcu_active_readers[*urcu_parity]--;
 }
 
-extern void rcu_write_lock(void);
-extern void rcu_write_unlock(void);
-
 extern void *urcu_publish_content(void **ptr, void *new);
 
 /*