X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=libringbuffer%2Fvatomic.h;h=29bb67d7cc0f405ca579dc74898381e1e61c450c;hb=4e918eab0496b86c6a4f7e46c1b0a78d21a6bb54;hp=eea6d049c71d995545054c5775a0b9cda43baf59;hpb=4931a13e87ddbbabe4911e622e78c85b2197ecbf;p=lttng-ust.git

diff --git a/libringbuffer/vatomic.h b/libringbuffer/vatomic.h
index eea6d049..29bb67d7 100644
--- a/libringbuffer/vatomic.h
+++ b/libringbuffer/vatomic.h
@@ -6,9 +6,19 @@
  *
  * Copyright (C) 2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
  *
- * Dual LGPL v2.1/GPL v2 license.
+ * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
+ * OR IMPLIED.  ANY USE IS AT YOUR OWN RISK.
+ *
+ * Permission is hereby granted to use or copy this program
+ * for any purpose,  provided the above notices are retained on all copies.
+ * Permission to modify the code and to distribute modified code is granted,
+ * provided the above notices are retained, and a notice that the code was
+ * modified is included with the above copyright notice.
  */
 
+#include <assert.h>
+#include <urcu/uatomic.h>
+
 /*
  * Same data type (long) accessed differently depending on configuration.
  * v field is for non-atomic access (protected by mutual exclusion).
@@ -18,65 +28,54 @@
  * atomic_long_t is used for globally shared buffers.
  */
 union v_atomic {
-	local_t l;
-	atomic_long_t a;
+	long a;	/* accessed through uatomic */
 	long v;
 };
 
 static inline
-long v_read(const struct lib_ring_buffer_config *config, union v_atomic *v_a)
+long v_read(const struct lttng_ust_lib_ring_buffer_config *config, union v_atomic *v_a)
 {
-	if (config->sync == RING_BUFFER_SYNC_PER_CPU)
-		return local_read(&v_a->l);
-	else
-		return atomic_long_read(&v_a->a);
+	assert(config->sync != RING_BUFFER_SYNC_PER_CPU);
+	return uatomic_read(&v_a->a);
 }
 
 static inline
-void v_set(const struct lib_ring_buffer_config *config, union v_atomic *v_a,
+void v_set(const struct lttng_ust_lib_ring_buffer_config *config, union v_atomic *v_a,
 	   long v)
 {
-	if (config->sync == RING_BUFFER_SYNC_PER_CPU)
-		local_set(&v_a->l, v);
-	else
-		atomic_long_set(&v_a->a, v);
+	assert(config->sync != RING_BUFFER_SYNC_PER_CPU);
+	uatomic_set(&v_a->a, v);
 }
 
 static inline
-void v_add(const struct lib_ring_buffer_config *config, long v, union v_atomic *v_a)
+void v_add(const struct lttng_ust_lib_ring_buffer_config *config, long v, union v_atomic *v_a)
 {
-	if (config->sync == RING_BUFFER_SYNC_PER_CPU)
-		local_add(v, &v_a->l);
-	else
-		atomic_long_add(v, &v_a->a);
+	assert(config->sync != RING_BUFFER_SYNC_PER_CPU);
+	uatomic_add(&v_a->a, v);
 }
 
 static inline
-void v_inc(const struct lib_ring_buffer_config *config, union v_atomic *v_a)
+void v_inc(const struct lttng_ust_lib_ring_buffer_config *config, union v_atomic *v_a)
 {
-	if (config->sync == RING_BUFFER_SYNC_PER_CPU)
-		local_inc(&v_a->l);
-	else
-		atomic_long_inc(&v_a->a);
+	assert(config->sync != RING_BUFFER_SYNC_PER_CPU);
+	uatomic_inc(&v_a->a);
 }
 
 /*
  * Non-atomic decrement. Only used by reader, apply to reader-owned subbuffer.
  */
 static inline
-void _v_dec(const struct lib_ring_buffer_config *config, union v_atomic *v_a)
+void _v_dec(const struct lttng_ust_lib_ring_buffer_config *config, union v_atomic *v_a)
 {
 	--v_a->v;
 }
 
 static inline
-long v_cmpxchg(const struct lib_ring_buffer_config *config, union v_atomic *v_a,
+long v_cmpxchg(const struct lttng_ust_lib_ring_buffer_config *config, union v_atomic *v_a,
 	       long old, long _new)
 {
-	if (config->sync == RING_BUFFER_SYNC_PER_CPU)
-		return local_cmpxchg(&v_a->l, old, _new);
-	else
-		return atomic_long_cmpxchg(&v_a->a, old, _new);
+	assert(config->sync != RING_BUFFER_SYNC_PER_CPU);
+	return uatomic_cmpxchg(&v_a->a, old, _new);
 }
 
 #endif /* _LINUX_RING_BUFFER_VATOMIC_H */