76 lines
2.0 KiB
C
76 lines
2.0 KiB
C
/*
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**********************************************************************************************
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* File: rcu_hash.h
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* Description: rcu hashtable
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* Authors: Liu WenTan <liuwentan@geedgenetworks.com>
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* Date: 2022-10-31
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* Copyright: (c) 2018-2022 Geedge Networks, Inc. All rights reserved.
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***********************************************************************************************
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*/
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#ifndef _RCU_HASH_H_
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#define _RCU_HASH_H_
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#ifdef __cpluscplus
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extern "C"
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{
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#endif
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#include "uthash/uthash.h"
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typedef void rcu_hash_data_free_fn(void *user_ctx, void *data);
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/* rcu hash table */
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struct rcu_hash_table;
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struct rcu_hash_table *rcu_hash_new(rcu_hash_data_free_fn *free_fn);
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void rcu_hash_free(struct rcu_hash_table *htable);
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void rcu_hash_set_user_ctx(struct rcu_hash_table *htable, void *user_ctx);
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void *rcu_hash_get_user_ctx(struct rcu_hash_table *htable);
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/**
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* @brief just means add to the updating nodes
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* after call rcu_hash_commit, they become effective nodes
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*/
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void rcu_hash_add(struct rcu_hash_table *htable, const char *key, size_t key_len, void *data);
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void rcu_hash_del(struct rcu_hash_table *htable, const char *key, size_t key_len);
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/**
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* @brief find in effective nodes
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*
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* @param htable: the rcu_hash_table
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* @param key: the key used for searching in the hash table
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* @param key_len: the key's length
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*
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* @retval NULL or
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*/
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void *rcu_hash_find(struct rcu_hash_table *htable, const char *key, size_t key_len);
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size_t rcu_hash_count(struct rcu_hash_table *htable);
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size_t rcu_hash_updating_count(struct rcu_hash_table *htable);
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/**
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* @brief make add/del effective
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*/
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void rcu_hash_commit(struct rcu_hash_table *htable);
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size_t rcu_hash_garbage_queue_len(struct rcu_hash_table *htable);
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size_t rcu_hash_list_updating_data(struct rcu_hash_table *htable, void ***data_array);
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/**
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* @brief check if rcu hash table is updating
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*
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* @retval 1 means htable is updating, otherwise 0
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*/
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int rcu_hash_updating_flag(struct rcu_hash_table *htable);
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#ifdef __cpluscplus
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}
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#endif
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#endif |