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61009379 MD |
1 | #ifndef _URCU_RCUJA_INTERNAL_H |
2 | #define _URCU_RCUJA_INTERNAL_H | |
3 | ||
4 | /* | |
5 | * rcuja/rcuja-internal.h | |
6 | * | |
7 | * Userspace RCU library - RCU Judy Array Internal Header | |
8 | * | |
9 | * Copyright 2012 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
10 | * | |
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. | |
15 | * | |
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. | |
20 | * | |
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 | |
24 | */ | |
25 | ||
511b4dcc MD |
26 | #include <pthread.h> |
27 | #include <urcu/rculfhash.h> | |
28 | ||
29 | /* Never declared. Opaque type used to store flagged node pointers. */ | |
30 | struct rcu_ja_node_flag; | |
31 | ||
32 | /* | |
33 | * Shadow node contains mutex and call_rcu head associated with a node. | |
34 | */ | |
35 | struct rcu_ja_shadow_node { | |
d22c185b MD |
36 | struct cds_lfht_node ht_node; /* hash table node */ |
37 | struct rcu_ja_node *node; /* reverse mapping and hash table key */ | |
38 | pthread_mutex_t lock; /* mutual exclusion on node */ | |
39 | struct rcu_head head; /* for deferred node and shadow node reclaim */ | |
511b4dcc MD |
40 | }; |
41 | ||
42 | struct rcu_ja { | |
43 | struct rcu_ja_node_flag *root; | |
44 | /* | |
45 | * We use a hash table to associate nodes to their respective | |
46 | * shadow node. This helps reducing lookup hot path cache | |
47 | * footprint, especially for very small nodes. | |
48 | */ | |
49 | struct cds_lfht *ht; | |
50 | }; | |
61009379 | 51 | |
25fde237 MD |
52 | __attribute__((visibility("protected"))) |
53 | struct rcu_ja_shadow_node *rcuja_shadow_lookup_lock(struct cds_lfht *ht, | |
54 | struct rcu_ja_node *node); | |
55 | __attribute__((visibility("protected"))) | |
56 | void rcuja_shadow_unlock(struct rcu_ja_shadow_node *shadow_node); | |
57 | __attribute__((visibility("protected"))) | |
58 | int rcuja_shadow_set(struct cds_lfht *ht, | |
59 | struct rcu_ja_node *node); | |
60 | __attribute__((visibility("protected"))) | |
61 | int rcuja_shadow_clear_and_free_node(struct cds_lfht *ht, | |
62 | struct rcu_ja_node *node); | |
63 | __attribute__((visibility("protected"))) | |
64 | struct cds_lfht *rcuja_create_ht(void); | |
65 | __attribute__((visibility("protected"))) | |
66 | void rcuja_delete_ht(struct cds_lfht *ht); | |
67 | ||
61009379 | 68 | #endif /* _URCU_RCUJA_INTERNAL_H */ |