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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 /* HAVE_CONFIG_H */
#include <ngtcp2/ngtcp2.h>
#include "ngtcp2_mem.h"
#include "ngtcp2_ksl.h"
/* Implementation of unordered map */
typedef uint64_t key_type;
typedef struct ngtcp2_map_entry {
struct ngtcp2_map_entry *next;
key_type key;
} ngtcp2_map_entry;
typedef struct ngtcp2_map_bucket {
ngtcp2_map_entry *ptr;
ngtcp2_ksl *ksl;
} ngtcp2_map_bucket;
typedef struct {
ngtcp2_map_bucket *table;
const ngtcp2_mem *mem;
size_t size;
uint32_t tablelen;
} ngtcp2_map;
/*
* Initializes the map |map|.
*
* This function returns 0 if it succeeds, or one of the following
* negative error codes:
*
* NGTCP2_ERR_NOMEM
* Out of memory
*/
int ngtcp2_map_init(ngtcp2_map *map, const ngtcp2_mem *mem);
/*
* Deallocates any resources allocated for |map|. The stored entries
* are not freed by this function. Use ngtcp2_map_each_free() to free
* each entries.
*/
void ngtcp2_map_free(ngtcp2_map *map);
/*
* Deallocates each entries using |func| function and any resources
* allocated for |map|. The |func| function is responsible for freeing
* given the |entry| object. The |ptr| will be passed to the |func| as
* send argument. The return value of the |func| will be ignored.
*/
void ngtcp2_map_each_free(ngtcp2_map *map,
int (*func)(ngtcp2_map_entry *entry, void *ptr),
void *ptr);
/*
* Initializes the |entry| with the |key|. All entries to be inserted
* to the map must be initialized with this function.
*/
void ngtcp2_map_entry_init(ngtcp2_map_entry *entry, key_type key);
/*
* Inserts the new |entry| with the key |entry->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_entry *entry);
/*
* Returns the entry associated by the key |key|. If there is no such
* entry, this function returns NULL.
*/
ngtcp2_map_entry *ngtcp2_map_find(ngtcp2_map *map, key_type key);
/*
* 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, key_type key);
/*
* Removes all entries from |map|.
*/
void ngtcp2_map_clear(ngtcp2_map *map);
/*
* Returns the number of items stored in the map |map|.
*/
size_t ngtcp2_map_size(ngtcp2_map *map);
/*
* 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.
*
* Don't use this function to free each entry. Use
* ngtcp2_map_each_free() instead.
*/
int ngtcp2_map_each(ngtcp2_map *map,
int (*func)(ngtcp2_map_entry *entry, void *ptr), void *ptr);
#endif /* NGTCP2_MAP_H */
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