X-Git-Url: https://git.liburcu.org/?p=urcu.git;a=blobdiff_plain;f=urcu-qsbr.c;h=1dc99792d7a49f2f6f3614693e34cde239312bfb;hp=8d8a9cf05ced0fd18ef9943110dc22a2e6e05e87;hb=a128aeb4a7b1a05c9ddbc8b0239c93ca00984f4a;hpb=83a2c42177d2b28890bc3674d30f9ed5f8edb0a8

diff --git a/urcu-qsbr.c b/urcu-qsbr.c
index 8d8a9cf..1dc9979 100644
--- a/urcu-qsbr.c
+++ b/urcu-qsbr.c
@@ -24,6 +24,7 @@
  */
 
 #define _GNU_SOURCE
+#define _LGPL_SOURCE
 #include <stdio.h>
 #include <pthread.h>
 #include <signal.h>
@@ -34,12 +35,15 @@
 #include <errno.h>
 #include <poll.h>
 
+#include "urcu/wfqueue.h"
 #include "urcu/map/urcu-qsbr.h"
-
 #define BUILD_QSBR_LIB
 #include "urcu/static/urcu-qsbr.h"
+
 /* Do not #define _LGPL_SOURCE to ensure we can emit the wrapper symbols */
+#undef _LGPL_SOURCE
 #include "urcu-qsbr.h"
+#define _LGPL_SOURCE
 
 void __attribute__((destructor)) rcu_exit(void);
 
@@ -214,8 +218,11 @@ void synchronize_rcu(void)
 	 * our own quiescent state. This allows using synchronize_rcu()
 	 * in threads registered as readers.
 	 */
-	if (was_online)
+	if (was_online) {
 		CMM_STORE_SHARED(rcu_reader.ctr, 0);
+		cmm_smp_mb();	/* write rcu_reader.ctr before read futex */
+		wake_up_gp();
+	}
 
 	mutex_lock(&rcu_gp_lock);
 
@@ -273,8 +280,11 @@ void synchronize_rcu(void)
 	 * in threads registered as readers.
 	 */
 	cmm_smp_mb();
-	if (was_online)
+	if (was_online) {
 		CMM_STORE_SHARED(rcu_reader.ctr, 0);
+		cmm_smp_mb();	/* write rcu_reader.ctr before read futex */
+		wake_up_gp();
+	}
 
 	mutex_lock(&rcu_gp_lock);
 	if (cds_list_empty(&registry))