rte_hash.h

Go to the documentation of this file.

/*-
 *   BSD LICENSE
 *
 *   Copyright(c) 2010-2015 Intel Corporation. All rights reserved.
 *   All rights reserved.
 *
 *   Redistribution and use in source and binary forms, with or without
 *   modification, are permitted provided that the following conditions
 *   are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * 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.
 *     * Neither the name of Intel Corporation nor the names of its
 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *   "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 COPYRIGHT
 *   OWNER OR CONTRIBUTORS 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 _RTE_HASH_H_
#define _RTE_HASH_H_

#include <stdint.h>
#include <stddef.h>

#ifdef __cplusplus
extern "C" {
#endif

#define RTE_HASH_ENTRIES_MAX            (1 << 30)

#define RTE_HASH_NAMESIZE           32

#define RTE_HASH_LOOKUP_BULK_MAX        64
#define RTE_HASH_LOOKUP_MULTI_MAX       RTE_HASH_LOOKUP_BULK_MAX

#define RTE_HASH_EXTRA_FLAGS_TRANS_MEM_SUPPORT  0x01

#define RTE_HASH_EXTRA_FLAGS_MULTI_WRITER_ADD 0x02

typedef uint32_t hash_sig_t;

typedef uint32_t (*rte_hash_function)(const void *key, uint32_t key_len,
                      uint32_t init_val);

typedef int (*rte_hash_cmp_eq_t)(const void *key1, const void *key2, size_t key_len);

struct rte_hash_parameters {
    const char *name;       
    uint32_t entries;       
    uint32_t reserved;      
    uint32_t key_len;       
    rte_hash_function hash_func;    
    uint32_t hash_func_init_val;    
    int socket_id;          
    uint8_t extra_flag;     
};

struct rte_hash;

struct rte_hash *
rte_hash_create(const struct rte_hash_parameters *params);

void rte_hash_set_cmp_func(struct rte_hash *h, rte_hash_cmp_eq_t func);

struct rte_hash *
rte_hash_find_existing(const char *name);

void
rte_hash_free(struct rte_hash *h);

void
rte_hash_reset(struct rte_hash *h);

int
rte_hash_add_key_data(const struct rte_hash *h, const void *key, void *data);

int32_t
rte_hash_add_key_with_hash_data(const struct rte_hash *h, const void *key,
                        hash_sig_t sig, void *data);

int32_t
rte_hash_add_key(const struct rte_hash *h, const void *key);

int32_t
rte_hash_add_key_with_hash(const struct rte_hash *h, const void *key, hash_sig_t sig);

int32_t
rte_hash_del_key(const struct rte_hash *h, const void *key);

int32_t
rte_hash_del_key_with_hash(const struct rte_hash *h, const void *key, hash_sig_t sig);

int
rte_hash_get_key_with_position(const struct rte_hash *h, const int32_t position,
                   void **key);

int
rte_hash_lookup_data(const struct rte_hash *h, const void *key, void **data);

int
rte_hash_lookup_with_hash_data(const struct rte_hash *h, const void *key,
                    hash_sig_t sig, void **data);

int32_t
rte_hash_lookup(const struct rte_hash *h, const void *key);

int32_t
rte_hash_lookup_with_hash(const struct rte_hash *h,
                const void *key, hash_sig_t sig);

hash_sig_t
rte_hash_hash(const struct rte_hash *h, const void *key);

int
rte_hash_lookup_bulk_data(const struct rte_hash *h, const void **keys,
              uint32_t num_keys, uint64_t *hit_mask, void *data[]);

int
rte_hash_lookup_bulk(const struct rte_hash *h, const void **keys,
              uint32_t num_keys, int32_t *positions);

int32_t
rte_hash_iterate(const struct rte_hash *h, const void **key, void **data, uint32_t *next);
#ifdef __cplusplus
}
#endif

#endif /* _RTE_HASH_H_ */