[ltt-dev] [PATCH RFC urcu 3/4] Allow taking address of rcu_read_lock() and rcu_read_unlock()

[paulmck@linux.vnet.ibm.com (Paul E. McKenney)]

Also incorporate README feedback from Mathieu and Josh.

Signed-off-by: Paul E. McKenney <paulmck at linux.vnet.ibm.com>
---
 README      |    9 ++++++---
 urcu-bp.h   |    4 ++--
 urcu-qsbr.h |   10 +++++-----
 urcu.h      |   12 ++++++------
 4 files changed, 19 insertions(+), 16 deletions(-)

diff --git a/README b/README
index 56e98d7..659511f 100644
--- a/README
+++ b/README
@@ -205,6 +205,9 @@ Interaction with fork()
 	rcu_bp_before_fork, rcu_bp_after_fork_parent and
 	rcu_bp_after_fork_child.
 
-	Applications that use call_rcu() are required to invoke
-	call_rcu_after_fork_child() from the child process after a
-	successful fork() system call that is not followed by exec().
+	Applications that use call_rcu() and that fork() without
+	doing an immediate exec() must take special action.  The parent
+	must invoke call_rcu_before_fork() before the fork() and
+	call_rcu_after_fork_parent() after the fork().  The child
+	process must invoke call_rcu_after_fork_child().
+	These three APIs are suitable for passing to pthread_atfork().
diff --git a/urcu-bp.h b/urcu-bp.h
index fdf885c..bc2dbc3 100644
--- a/urcu-bp.h
+++ b/urcu-bp.h
@@ -71,8 +71,8 @@ extern "C" {
  *
  * Mark the beginning and end of a read-side critical section.
  */
-#define rcu_read_lock_bp()		_rcu_read_lock()
-#define rcu_read_unlock_bp()		_rcu_read_unlock()
+#define rcu_read_lock_bp		_rcu_read_lock
+#define rcu_read_unlock_bp		_rcu_read_unlock
 
 #else /* !_LGPL_SOURCE */
 
diff --git a/urcu-qsbr.h b/urcu-qsbr.h
index 984d70c..7ef1bfe 100644
--- a/urcu-qsbr.h
+++ b/urcu-qsbr.h
@@ -67,12 +67,12 @@ extern "C" {
  * DON'T FORGET TO USE rcu_register_thread/rcu_unregister_thread()
  * FOR EACH THREAD WITH READ-SIDE CRITICAL SECTION.
  */
-#define rcu_read_lock_qsbr()		_rcu_read_lock()
-#define rcu_read_unlock_qsbr()		_rcu_read_unlock()
+#define rcu_read_lock_qsbr		_rcu_read_lock
+#define rcu_read_unlock_qsbr		_rcu_read_unlock
 
-#define rcu_quiescent_state_qsbr()	_rcu_quiescent_state()
-#define rcu_thread_offline_qsbr()	_rcu_thread_offline()
-#define rcu_thread_online_qsbr()	_rcu_thread_online()
+#define rcu_quiescent_state_qsbr	_rcu_quiescent_state
+#define rcu_thread_offline_qsbr		_rcu_thread_offline
+#define rcu_thread_online_qsbr		_rcu_thread_online
 
 #else /* !_LGPL_SOURCE */
 
diff --git a/urcu.h b/urcu.h
index 00d9b75..417e609 100644
--- a/urcu.h
+++ b/urcu.h
@@ -71,14 +71,14 @@ extern "C" {
  * READ-SIDE CRITICAL SECTION.
  */
 #ifdef RCU_MEMBARRIER
-#define rcu_read_lock_memb()		_rcu_read_lock()
-#define rcu_read_unlock_memb()		_rcu_read_unlock()
+#define rcu_read_lock_memb		_rcu_read_lock
+#define rcu_read_unlock_memb		_rcu_read_unlock
 #elif defined(RCU_SIGNAL)
-#define rcu_read_lock_sig()		_rcu_read_lock()
-#define rcu_read_unlock_sig()		_rcu_read_unlock()
+#define rcu_read_lock_sig		_rcu_read_lock
+#define rcu_read_unlock_sig		_rcu_read_unlock
 #elif defined(RCU_MB)
-#define rcu_read_lock_mb()		_rcu_read_lock()
-#define rcu_read_unlock_mb()		_rcu_read_unlock()
+#define rcu_read_lock_mb		_rcu_read_lock
+#define rcu_read_unlock_mb		_rcu_read_unlock
 #endif
 
 #else /* !_LGPL_SOURCE */
-- 
1.7.3.2