--- /dev/null
+#ifndef _URCU_RCULFSTACK_STATIC_H
+#define _URCU_RCULFSTACK_STATIC_H
+
+/*
+ * rculfstack-static.h
+ *
+ * Userspace RCU library - Lock-Free RCU Stack
+ *
+ * Copyright 2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * TO BE INCLUDED ONLY IN LGPL-COMPATIBLE CODE. See rculfstack.h for linking
+ * dynamically with the userspace rcu library.
+ *
+ * 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
+ */
+
+#include <urcu/uatomic_arch.h>
+/* A urcu implementation header should be already included. */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void _cds_lfs_node_init_rcu(struct cds_lfs_node_rcu *node)
+{
+}
+
+void _cds_lfs_init_rcu(struct cds_lfs_stack_rcu *s)
+{
+ s->head = NULL;
+}
+
+void _cds_lfs_push_rcu(struct cds_lfs_stack_rcu *s, struct cds_lfs_node_rcu *node)
+{
+ struct cds_lfs_node_rcu *head = NULL;
+
+ for (;;) {
+ struct cds_lfs_node_rcu *old_head = head;
+
+ node->next = head;
+ /*
+ * uatomic_cmpxchg() implicit memory barrier orders earlier
+ * stores to node before publication.
+ */
+ head = uatomic_cmpxchg(&s->head, old_head, node);
+ if (old_head == head)
+ break;
+ }
+}
+
+/*
+ * Should be called under rcu read-side lock.
+ *
+ * The caller must wait for a grace period to pass before freeing the returned
+ * node or modifying the cds_lfs_node_rcu structure.
+ * Returns NULL if stack is empty.
+ */
+struct cds_lfs_node_rcu *
+_cds_lfs_pop_rcu(struct cds_lfs_stack_rcu *s)
+{
+ for (;;) {
+ struct cds_lfs_node_rcu *head;
+
+ head = rcu_dereference(s->head);
+ if (head) {
+ struct cds_lfs_node_rcu *next = rcu_dereference(head->next);
+
+ if (uatomic_cmpxchg(&s->head, head, next) == head) {
+ return head;
+ } else {
+ /* Concurrent modification. Retry. */
+ continue;
+ }
+ } else {
+ /* Empty stack */
+ return NULL;
+ }
+ }
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _URCU_RCULFSTACK_STATIC_H */