*
* Userspace RCU header
*
- * Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
- *
- * Credits for Paul E. McKenney <paulmck@linux.vnet.ibm.com>
- * for inspiration coming from the Linux kernel RCU and rcu-preempt.
+ * Copyright (c) 2009 Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
+ * Copyright (c) 2009 Paul E. McKenney, IBM Corporation.
*
* LGPL-compatible code should include this header with :
*
* #define _LGPL_SOURCE
* #include <urcu.h>
*
- * Distributed under LGPLv2.1
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* IBM's contributions to this file may be relicensed under LGPLv2 or later.
*/
#include <stdlib.h>
#include <pthread.h>
+/*
+ * Important !
+ *
+ * Each thread containing read-side critical sections must be registered
+ * with rcu_register_thread() before calling rcu_read_lock().
+ * rcu_unregister_thread() should be called before the thread exits.
+ */
+
#ifdef _LGPL_SOURCE
#include <urcu-static.h>
#define rcu_read_unlock _rcu_read_unlock
#define rcu_assign_pointer _rcu_assign_pointer
+#define rcu_cmpxchg_pointer _rcu_cmpxchg_pointer
#define rcu_xchg_pointer _rcu_xchg_pointer
#define rcu_publish_content _rcu_publish_content
#define rcu_assign_pointer(p, v) \
rcu_assign_pointer_sym((void **)(p), (v))
+extern void *rcu_cmpxchg_pointer_sym(void **p, void *old, void *_new);
+#define rcu_cmpxchg_pointer(p, old, _new) \
+ rcu_cmpxchg_pointer_sym((void **)(p), (old), (_new))
+
extern void *rcu_xchg_pointer_sym(void **p, void *v);
#define rcu_xchg_pointer(p, v) \
rcu_xchg_pointer_sym((void **)(p), (v))
extern void rcu_register_thread(void);
extern void rcu_unregister_thread(void);
+/*
+ * Explicit urcu initialization, for "early" use within library constructors.
+ */
+extern void urcu_init(void);
+
#endif /* _URCU_H */