1 #ifndef _URCU_RCUJA_INTERNAL_H
2 #define _URCU_RCUJA_INTERNAL_H
5 * rcuja/rcuja-internal.h
7 * Userspace RCU library - RCU Judy Array Internal Header
9 * Copyright 2012 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
11 * This library is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU Lesser General Public
13 * License as published by the Free Software Foundation; either
14 * version 2.1 of the License, or (at your option) any later version.
16 * This library is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * Lesser General Public License for more details.
21 * You should have received a copy of the GNU Lesser General Public
22 * License along with this library; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
29 #include <urcu/rculfhash.h>
31 /* Never declared. Opaque type used to store flagged node pointers. */
32 struct cds_ja_inode_flag
;
35 * Shadow node contains mutex and call_rcu head associated with a node.
37 struct cds_ja_shadow_node
{
38 struct cds_lfht_node ht_node
; /* hash table node */
39 struct cds_ja_inode
*node
; /* reverse mapping and hash table key */
41 * mutual exclusion on all nodes belonging to the same tree
42 * position (e.g. both nodes before and after recompaction
45 pthread_mutex_t
*lock
;
46 unsigned int nr_child
; /* number of children in node */
47 struct rcu_head head
; /* for deferred node and shadow node reclaim */
48 int is_root
; /* is it a root node ? */
52 struct cds_ja_inode_flag
*root
;
53 unsigned int tree_depth
;
56 * We use a hash table to associate node keys to their
57 * respective shadow node. This helps reducing lookup hot path
58 * cache footprint, especially for very small nodes.
63 __attribute__((visibility("protected")))
64 struct cds_ja_shadow_node
*rcuja_shadow_lookup_lock(struct cds_lfht
*ht
,
65 struct cds_ja_inode
*node
);
67 __attribute__((visibility("protected")))
68 void rcuja_shadow_unlock(struct cds_ja_shadow_node
*shadow_node
);
70 __attribute__((visibility("protected")))
71 int rcuja_shadow_set(struct cds_lfht
*ht
,
72 struct cds_ja_inode
*new_node
,
73 struct cds_ja_shadow_node
*inherit_from
);
75 /* rcuja_shadow_clear flags */
77 RCUJA_SHADOW_CLEAR_FREE_NODE
= (1U << 0),
78 RCUJA_SHADOW_CLEAR_FREE_LOCK
= (1U << 1),
81 __attribute__((visibility("protected")))
82 int rcuja_shadow_clear(struct cds_lfht
*ht
,
83 struct cds_ja_inode
*node
,
84 struct cds_ja_shadow_node
*shadow_node
,
87 __attribute__((visibility("protected")))
88 void rcuja_shadow_prune(struct cds_lfht
*ht
,
91 __attribute__((visibility("protected")))
92 struct cds_lfht
*rcuja_create_ht(const struct rcu_flavor_struct
*flavor
);
94 __attribute__((visibility("protected")))
95 int rcuja_delete_ht(struct cds_lfht
*ht
);
100 #define dbg_printf(fmt, args...) printf("[debug rcuja] " fmt, ## args)
102 #define dbg_printf(fmt, args...) \
104 /* do nothing but check printf format */ \
106 printf("[debug rcuja] " fmt, ## args); \
110 #endif /* _URCU_RCUJA_INTERNAL_H */