rculfhash: make cds_lfht_iter_get_node argument const

[urcu.git] / urcu / rculfstack.h

diff --git a/urcu/rculfstack.h b/urcu/rculfstack.h
deleted file mode 100644 (file)
index 8cf7d13..0000000
--- a/urcu/rculfstack.h
+++ /dev/null
@@ -1,110 +0,0 @@
-#ifndef _URCU_RCULFSTACK_H
-#define _URCU_RCULFSTACK_H
-
-/*
- * rculfstack.h
- *
- * Userspace RCU library - Lock-Free RCU Stack
- *
- * Copyright 2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * 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
- */
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#if (!defined(_GNU_SOURCE) && !defined(_LGPL_SOURCE))
-#error "Dynamic loader LGPL wrappers not implemented yet"
-#endif
-
-struct rcu_lfs_node {
-       struct rcu_lfs_node *next;
-};
-
-struct rcu_lfs_stack {
-       struct rcu_lfs_node *head;
-};
-
-void rcu_lfs_node_init(struct rcu_lfs_node *node)
-{
-}
-
-void rcu_lfs_init(struct rcu_lfs_stack *s)
-{
-       s->head = NULL;
-}
-
-void rcu_lfs_push(struct rcu_lfs_stack *s, struct rcu_lfs_node *node)
-{
-       for (;;) {
-               struct rcu_lfs_node *head;
-
-               rcu_read_lock();
-               head = rcu_dereference(s->head);
-               node->next = head;
-               /*
-                * uatomic_cmpxchg() implicit memory barrier orders earlier
-                * stores to node before publication.
-                */
-               if (uatomic_cmpxchg(&s->head, head, node) == head) {
-                       rcu_read_unlock();
-                       return;
-               } else {
-                       /* Failure to prepend. Retry. */
-                       rcu_read_unlock();
-                       continue;
-               }
-       }
-}
-
-/*
- * The caller must wait for a grace period to pass before freeing the returned
- * node or modifying the rcu_lfs_node structure.
- * Returns NULL if stack is empty.
- */
-struct rcu_lfs_node *
-rcu_lfs_pop(struct rcu_lfs_stack *s)
-{
-       for (;;) {
-               struct rcu_lfs_node *head;
-
-               rcu_read_lock();
-               head = rcu_dereference(s->head);
-               if (head) {
-                       struct rcu_lfs_node *next = rcu_dereference(head->next);
-
-                       if (uatomic_cmpxchg(&s->head, head, next) == head) {
-                               rcu_read_unlock();
-                               return head;
-                       } else {
-                               /* Concurrent modification. Retry. */
-                               rcu_read_unlock();
-                               continue;
-                       }
-               } else {
-                       /* Empty stack */
-                       rcu_read_unlock();
-                       return NULL;
-               }
-       }
-}
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* _URCU_RCULFSTACK_H */