#define _LTTNG_TRACEPOINT_RCU_H
/*
- * Copyright (c) 2011 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * Copyright 2011-2012 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
*
- * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
- * OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
*
- * 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.
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
*
- * This file allows weak linking on tracepoint RCU symbols for non-LGPL
- * code.
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
*/
#include <urcu/compiler.h>
#include <urcu-bp.h>
-#define TP_RCU_LINK_TEST() 1
#define tp_rcu_read_lock_bp rcu_read_lock_bp
#define tp_rcu_read_unlock_bp rcu_read_unlock_bp
-#define tp_rcu_dereference_bp rcu_dereference_bp
+#define tp_rcu_dereference_bp rcu_dereference
+#define TP_RCU_LINK_TEST() 1
#else /* _LGPL_SOURCE */
-#define TP_RCU_LINK_TEST() tp_rcu_read_lock_bp
+#define tp_rcu_read_lock_bp tracepoint_dlopen_ptr->rcu_read_lock_sym_bp
+#define tp_rcu_read_unlock_bp tracepoint_dlopen_ptr->rcu_read_unlock_sym_bp
-/* Symbols looked up with dlsym */
-static void (*tp_rcu_read_lock_bp)(void) __attribute__((unused));
-static void (*tp_rcu_read_unlock_bp)(void) __attribute__((unused));
-static void *(*tp_rcu_dereference_sym_bp)(void *p) __attribute__((unused));
+#define tp_rcu_dereference_bp(p) \
+ URCU_FORCE_CAST(__typeof__(p), \
+ tracepoint_dlopen_ptr->rcu_dereference_sym_bp(URCU_FORCE_CAST(void *, p)))
-#define tp_rcu_dereference_bp(p) \
- ({ \
- typeof(p) _________p1 = URCU_FORCE_CAST(typeof(p), \
- tp_rcu_dereference_sym_bp(URCU_FORCE_CAST(void *, p))); \
- (_________p1); \
- })
+#define TP_RCU_LINK_TEST() (tracepoint_dlopen_ptr && tp_rcu_read_lock_bp)
#endif /* _LGPL_SOURCE */