projects / userspace-rcu.git / blame
| Commit | Line | Data |
|---|---|---|
| 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. */ | |
| d96bfb0d | 30 | struct cds_ja_node_flag; |
| 511b4dcc MD |
31 | |
| 32 | /* | |
| 33 | * Shadow node contains mutex and call_rcu head associated with a node. | |
| 34 | */ | |
| d96bfb0d | 35 | struct cds_ja_shadow_node { |
| d22c185b | 36 | struct cds_lfht_node ht_node; /* hash table node */ |
| d96bfb0d | 37 | struct cds_ja_node *node; /* reverse mapping and hash table key */ |
| e1db2db5 MD |
38 | /* |
| 39 | * mutual exclusion on all nodes belonging to the same tree | |
| 40 | * position (e.g. both nodes before and after recompaction | |
| 41 | * use the same lock). | |
| 42 | */ | |
| 43 | pthread_mutex_t *lock; | |
| 44 | unsigned int nr_child; /* number of children in node */ | |
| d22c185b | 45 | struct rcu_head head; /* for deferred node and shadow node reclaim */ |
| 511b4dcc MD |
46 | }; |
| 47 | ||
| d96bfb0d MD |
48 | struct cds_ja { |
| 49 | struct cds_ja_node_flag *root; | |
| 511b4dcc | 50 | /* |
| e1db2db5 MD |
51 | * We use a hash table to associate node keys to their |
| 52 | * respective shadow node. This helps reducing lookup hot path | |
| 53 | * cache footprint, especially for very small nodes. | |
| 511b4dcc MD |
54 | */ |
| 55 | struct cds_lfht *ht; | |
| 56 | }; | |
| 61009379 | 57 | |
| 25fde237 | 58 | __attribute__((visibility("protected"))) |
| d96bfb0d MD |
59 | struct cds_ja_shadow_node *rcuja_shadow_lookup_lock(struct cds_lfht *ht, |
| 60 | struct cds_ja_node *node); | |
| 25fde237 | 61 | __attribute__((visibility("protected"))) |
| d96bfb0d | 62 | void rcuja_shadow_unlock(struct cds_ja_shadow_node *shadow_node); |
| 25fde237 MD |
63 | __attribute__((visibility("protected"))) |
| 64 | int rcuja_shadow_set(struct cds_lfht *ht, | |
| d96bfb0d MD |
65 | struct cds_ja_node *new_node, |
| 66 | struct cds_ja_shadow_node *inherit_from); | |
| 25fde237 | 67 | __attribute__((visibility("protected"))) |
| e1db2db5 MD |
68 | |
| 69 | /* rcuja_shadow_clear flags */ | |
| 70 | enum { | |
| 71 | RCUJA_SHADOW_CLEAR_FREE_NODE = (1U << 0), | |
| 72 | RCUJA_SHADOW_CLEAR_FREE_LOCK = (1U << 1), | |
| 73 | }; | |
| 74 | ||
| 75 | int rcuja_shadow_clear(struct cds_lfht *ht, | |
| d96bfb0d | 76 | struct cds_ja_node *node, |
| e1db2db5 | 77 | unsigned int flags); |
| 25fde237 | 78 | __attribute__((visibility("protected"))) |
| 5eb692c0 | 79 | struct cds_lfht *rcuja_create_ht(const struct rcu_flavor_struct *flavor); |
| 25fde237 MD |
80 | __attribute__((visibility("protected"))) |
| 81 | void rcuja_delete_ht(struct cds_lfht *ht); | |
| 82 | ||
| 61009379 | 83 | #endif /* _URCU_RCUJA_INTERNAL_H */ |