X-Git-Url: https://git.liburcu.org/?p=urcu.git;a=blobdiff_plain;f=urcu-static.h;h=eea39bb0641f8b5d295a46dd4f316761a6e85d21;hp=1eeb2e6b03319c313d051ef71a3148add48ff264;hb=53706aa68118271d0d14bd5f1baa7ea1c4cf9754;hpb=b95a001f50047ab146becf9b9e514ab0639f67cd

diff --git a/urcu-static.h b/urcu-static.h
index 1eeb2e6..eea39bb 100644
--- a/urcu-static.h
+++ b/urcu-static.h
@@ -9,7 +9,7 @@
  * TO BE INCLUDED ONLY IN LGPL-COMPATIBLE CODE. See urcu.h for linking
  * dynamically with the userspace rcu library.
  *
- * Copyright (c) 2009 Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
+ * Copyright (c) 2009 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
  * Copyright (c) 2009 Paul E. McKenney, IBM Corporation.
  *
  * This library is free software; you can redistribute it and/or
@@ -59,7 +59,7 @@ extern "C" {
 # define MEMBARRIER_EXPEDITED		(1 << 0)
 # define MEMBARRIER_DELAYED		(1 << 1)
 # define MEMBARRIER_QUERY		(1 << 16)
-# define membarrier(...)		syscall(__NR_membarrier, __VA_ARGS__)
+# define membarrier(...)		syscall(SYS_membarrier, __VA_ARGS__)
 #else
 # undef RCU_MEMBARRIER
 # define RCU_MB
@@ -222,7 +222,7 @@ struct rcu_reader {
 	unsigned long ctr;
 	char need_mb;
 	/* Data used for registry */
-	struct list_head head __attribute__((aligned(CACHE_LINE_SIZE)));
+	struct list_head node __attribute__((aligned(CACHE_LINE_SIZE)));
 	pthread_t tid;
 };
 
@@ -242,17 +242,15 @@ static inline void wake_up_gp(void)
 	}
 }
 
-static inline int rcu_gp_ongoing(unsigned long *value)
+static inline int rcu_gp_ongoing(unsigned long *ctr)
 {
 	unsigned long v;
 
-	if (value == NULL)
-		return 0;
 	/*
 	 * Make sure both tests below are done on the same version of *value
 	 * to insure consistency.
 	 */
-	v = LOAD_SHARED(*value);
+	v = LOAD_SHARED(*ctr);
 	return (v & RCU_GP_CTR_NEST_MASK) &&
 		 ((v ^ rcu_gp_ctr) & RCU_GP_CTR_PHASE);
 }
@@ -261,6 +259,7 @@ static inline void _rcu_read_lock(void)
 {
 	unsigned long tmp;
 
+	barrier();	/* Ensure the compiler does not reorder us with mutex */
 	tmp = rcu_reader.ctr;
 	/*
 	 * rcu_gp_ctr is
@@ -296,9 +295,10 @@ static inline void _rcu_read_unlock(void)
 	} else {
 		_STORE_SHARED(rcu_reader.ctr, rcu_reader.ctr - RCU_GP_COUNT);
 	}
+	barrier();	/* Ensure the compiler does not reorder us with mutex */
 }
 
-#ifdef __cplusplus 
+#ifdef __cplusplus
 }
 #endif