*
* Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
*
- * Distributed under GPLv2
+ * Distributed under LGPLv2.1
+ *
+ * IBM's contributions to this file may be relicensed under LGPLv2 or later.
*/
#include <stdio.h>
#include <errno.h>
#include <poll.h>
+#include "urcu-static.h"
+/* Do not #define _LGPL_SOURCE to ensure we can emit the wrapper symbols */
#include "urcu.h"
pthread_mutex_t urcu_mutex = PTHREAD_MUTEX_INITIALIZER;
internal_urcu_unlock();
}
-void urcu_add_reader(pthread_t id)
+/*
+ * library wrappers to be used by non-LGPL compatible source code.
+ */
+
+void rcu_read_lock(void)
+{
+ _rcu_read_lock();
+}
+
+void rcu_read_unlock(void)
+{
+ _rcu_read_unlock();
+}
+
+void *rcu_dereference(void *p)
+{
+ return _rcu_dereference(p);
+}
+
+void *rcu_assign_pointer_sym(void **p, void *v)
+{
+ wmb();
+ return STORE_SHARED(p, v);
+}
+
+void *rcu_xchg_pointer_sym(void **p, void *v)
+{
+ wmb();
+ return xchg(p, v);
+}
+
+void *rcu_publish_content_sym(void **p, void *v)
+{
+ void *oldptr;
+
+ oldptr = _rcu_xchg_pointer(p, v);
+ synchronize_rcu();
+ return oldptr;
+}
+
+static void rcu_add_reader(pthread_t id)
{
struct reader_registry *oldarray;
* Never shrink (implementation limitation).
* This is O(nb threads). Eventually use a hash table.
*/
-void urcu_remove_reader(pthread_t id)
+static void rcu_remove_reader(pthread_t id)
{
struct reader_registry *index;
assert(0);
}
-void urcu_register_thread(void)
+void rcu_register_thread(void)
{
internal_urcu_lock();
- urcu_add_reader(pthread_self());
+ rcu_add_reader(pthread_self());
internal_urcu_unlock();
}
-void urcu_unregister_thread(void)
+void rcu_unregister_thread(void)
{
internal_urcu_lock();
- urcu_remove_reader(pthread_self());
+ rcu_remove_reader(pthread_self());
internal_urcu_unlock();
}
#ifndef DEBUG_FULL_MB
-void sigurcu_handler(int signo, siginfo_t *siginfo, void *context)
+static void sigurcu_handler(int signo, siginfo_t *siginfo, void *context)
{
/*
* Executing this smp_mb() is the only purpose of this signal handler.