Changeset View
Changeset View
Standalone View
Standalone View
contrib/lib9p/hashtable.h
- This file was added.
| /* | |||||
| * Copyright 2016 Jakub Klama <jceel@FreeBSD.org> | |||||
| * All rights reserved | |||||
| * | |||||
| * Redistribution and use in source and binary forms, with or without | |||||
| * modification, are permitted providing that the following conditions | |||||
| * are met: | |||||
| * 1. Redistributions of source code must retain the above copyright | |||||
| * notice, this list of conditions and the following disclaimer. | |||||
| * 2. Redistributions in binary form must reproduce the above copyright | |||||
| * notice, this list of conditions and the following disclaimer in the | |||||
| * documentation and/or other materials provided with the distribution. | |||||
| * | |||||
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |||||
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | |||||
| * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |||||
| * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY | |||||
| * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |||||
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |||||
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |||||
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |||||
| * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |||||
| * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |||||
| * POSSIBILITY OF SUCH DAMAGE. | |||||
| * | |||||
| */ | |||||
| #ifndef LIB9P_HASHTABLE_H | |||||
| #define LIB9P_HASHTABLE_H | |||||
| #include <pthread.h> | |||||
| #include <sys/queue.h> | |||||
| struct ht { | |||||
| struct ht_entry * ht_entries; | |||||
| ssize_t ht_nentries; | |||||
| pthread_rwlock_t ht_rwlock; | |||||
| }; | |||||
| struct ht_entry { | |||||
| TAILQ_HEAD(, ht_item) hte_items; | |||||
| }; | |||||
| struct ht_item { | |||||
| uint32_t hti_hash; | |||||
| void * hti_data; | |||||
| TAILQ_ENTRY(ht_item) hti_link; | |||||
| }; | |||||
| struct ht_iter { | |||||
| struct ht * htit_parent; | |||||
| struct ht_item * htit_curr; | |||||
| struct ht_item * htit_next; | |||||
| ssize_t htit_slot; | |||||
| }; | |||||
| #ifdef __clang__ | |||||
| #pragma clang diagnostic push | |||||
| #pragma clang diagnostic ignored "-Wthread-safety-analysis" | |||||
| #endif | |||||
| /* | |||||
| * Obtain read-lock on hash table. | |||||
| */ | |||||
| static inline int | |||||
| ht_rdlock(struct ht *h) | |||||
| { | |||||
| return (pthread_rwlock_rdlock(&h->ht_rwlock)); | |||||
| } | |||||
| /* | |||||
| * Obtain write-lock on hash table. | |||||
| */ | |||||
| static inline int | |||||
| ht_wrlock(struct ht *h) | |||||
| { | |||||
| return (pthread_rwlock_wrlock(&h->ht_rwlock)); | |||||
| } | |||||
| /* | |||||
| * Release lock on hash table. | |||||
| */ | |||||
| static inline int | |||||
| ht_unlock(struct ht *h) | |||||
| { | |||||
| return (pthread_rwlock_unlock(&h->ht_rwlock)); | |||||
| } | |||||
| #ifdef __clang__ | |||||
| #pragma clang diagnostic pop | |||||
| #endif | |||||
| void ht_init(struct ht *h, ssize_t size); | |||||
| void ht_destroy(struct ht *h); | |||||
| void *ht_find(struct ht *h, uint32_t hash); | |||||
| void *ht_find_locked(struct ht *h, uint32_t hash); | |||||
| int ht_add(struct ht *h, uint32_t hash, void *value); | |||||
| int ht_remove(struct ht *h, uint32_t hash); | |||||
| int ht_remove_locked(struct ht *h, uint32_t hash); | |||||
| int ht_remove_at_iter(struct ht_iter *iter); | |||||
| void ht_iter(struct ht *h, struct ht_iter *iter); | |||||
| void *ht_next(struct ht_iter *iter); | |||||
| #endif /* LIB9P_HASHTABLE_H */ | |||||