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/*
* ngtcp2
*
* Copyright (c) 2017 ngtcp2 contributors
* Copyright (c) 2012 nghttp2 contributors
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef NGTCP2_MAP_H
#define NGTCP2_MAP_H
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif /* defined(HAVE_CONFIG_H) */
#include <ngtcp2/ngtcp2.h>
#include "ngtcp2_mem.h"
/* Implementation of unordered map */
typedef uint64_t ngtcp2_map_key_type;
typedef struct ngtcp2_map_bucket {
uint32_t psl;
ngtcp2_map_key_type key;
void *data;
} ngtcp2_map_bucket;
typedef struct ngtcp2_map {
ngtcp2_map_bucket *table;
const ngtcp2_mem *mem;
uint64_t seed;
size_t size;
size_t hashbits;
} ngtcp2_map;
/*
* ngtcp2_map_init initializes the map |map|.
*/
void ngtcp2_map_init(ngtcp2_map *map, uint64_t seed, const ngtcp2_mem *mem);
/*
* ngtcp2_map_free deallocates any resources allocated for |map|. The
* stored entries are not freed by this function. Use
* ngtcp2_map_each() to free each entry.
*/
void ngtcp2_map_free(ngtcp2_map *map);
/*
* ngtcp2_map_insert inserts the new |data| with the |key| to the map
* |map|.
*
* This function returns 0 if it succeeds, or one of the following
* negative error codes:
*
* NGTCP2_ERR_INVALID_ARGUMENT
* The item associated by |key| already exists.
* NGTCP2_ERR_NOMEM
* Out of memory
*/
int ngtcp2_map_insert(ngtcp2_map *map, ngtcp2_map_key_type key, void *data);
/*
* ngtcp2_map_find returns the entry associated by the key |key|. If
* there is no such entry, this function returns NULL.
*/
void *ngtcp2_map_find(const ngtcp2_map *map, ngtcp2_map_key_type key);
/*
* ngtcp2_map_remove removes the entry associated by the key |key|
* from the |map|. The removed entry is not freed by this function.
*
* This function returns 0 if it succeeds, or one of the following
* negative error codes:
*
* NGTCP2_ERR_INVALID_ARGUMENT
* The entry associated by |key| does not exist.
*/
int ngtcp2_map_remove(ngtcp2_map *map, ngtcp2_map_key_type key);
/*
* ngtcp2_map_clear removes all entries from |map|. The removed entry
* is not freed by this function.
*/
void ngtcp2_map_clear(ngtcp2_map *map);
/*
* ngtcp2_map_size returns the number of items stored in the map
* |map|.
*/
size_t ngtcp2_map_size(const ngtcp2_map *map);
/*
* ngtcp2_map_each applies the function |func| to each entry in the
* |map| with the optional user supplied pointer |ptr|.
*
* If the |func| returns 0, this function calls the |func| with the
* next entry. If the |func| returns nonzero, it will not call the
* |func| for further entries and return the return value of the
* |func| immediately. Thus, this function returns 0 if all the
* invocations of the |func| return 0, or nonzero value which the last
* invocation of |func| returns.
*/
int ngtcp2_map_each(const ngtcp2_map *map, int (*func)(void *data, void *ptr),
void *ptr);
#ifndef WIN32
void ngtcp2_map_print_distance(const ngtcp2_map *map);
#endif /* !defined(WIN32) */
#endif /* !defined(NGTCP2_MAP_H) */
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