144 lines
4.5 KiB
C
144 lines
4.5 KiB
C
/*
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* nghttp2 - HTTP/2 C Library
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*
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* Copyright (c) 2012 Tatsuhiro Tsujikawa
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef NGHTTP2_MAP_H
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#define NGHTTP2_MAP_H
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif /* HAVE_CONFIG_H */
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#include <nghttp2/nghttp2.h>
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#include "nghttp2_int.h"
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#include "nghttp2_mem.h"
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/* Implementation of unordered map */
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typedef int32_t key_type;
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typedef struct nghttp2_map_entry {
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struct nghttp2_map_entry *next;
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key_type key;
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#if SIZEOF_INT_P == 4
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/* we requires 8 bytes aligment */
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int64_t pad;
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#endif
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} nghttp2_map_entry;
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typedef struct {
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nghttp2_map_entry **table;
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nghttp2_mem *mem;
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size_t size;
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uint32_t tablelen;
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} nghttp2_map;
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/*
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* Initializes the map |map|.
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*
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* This function returns 0 if it succeeds, or one of the following
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* negative error codes:
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*
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* NGHTTP2_ERR_NOMEM
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* Out of memory
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*/
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int nghttp2_map_init(nghttp2_map *map, nghttp2_mem *mem);
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/*
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* Deallocates any resources allocated for |map|. The stored entries
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* are not freed by this function. Use nghttp2_map_each_free() to free
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* each entries.
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*/
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void nghttp2_map_free(nghttp2_map *map);
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/*
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* Deallocates each entries using |func| function and any resources
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* allocated for |map|. The |func| function is responsible for freeing
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* given the |entry| object. The |ptr| will be passed to the |func| as
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* send argument. The return value of the |func| will be ignored.
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*/
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void nghttp2_map_each_free(nghttp2_map *map,
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int (*func)(nghttp2_map_entry *entry, void *ptr),
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void *ptr);
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/*
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* Initializes the |entry| with the |key|. All entries to be inserted
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* to the map must be initialized with this function.
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*/
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void nghttp2_map_entry_init(nghttp2_map_entry *entry, key_type key);
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/*
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* Inserts the new |entry| with the key |entry->key| to the map |map|.
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*
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* This function returns 0 if it succeeds, or one of the following
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* negative error codes:
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*
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* NGHTTP2_ERR_INVALID_ARGUMENT
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* The item associated by |key| already exists.
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* NGHTTP2_ERR_NOMEM
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* Out of memory
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*/
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int nghttp2_map_insert(nghttp2_map *map, nghttp2_map_entry *entry);
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/*
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* Returns the entry associated by the key |key|. If there is no such
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* entry, this function returns NULL.
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*/
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nghttp2_map_entry *nghttp2_map_find(nghttp2_map *map, key_type key);
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/*
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* Removes the entry associated by the key |key| from the |map|. The
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* removed entry is not freed by this function.
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*
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* This function returns 0 if it succeeds, or one of the following
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* negative error codes:
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*
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* NGHTTP2_ERR_INVALID_ARGUMENT
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* The entry associated by |key| does not exist.
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*/
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int nghttp2_map_remove(nghttp2_map *map, key_type key);
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/*
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* Returns the number of items stored in the map |map|.
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*/
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size_t nghttp2_map_size(nghttp2_map *map);
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/*
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* Applies the function |func| to each entry in the |map| with the
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* optional user supplied pointer |ptr|.
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*
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* If the |func| returns 0, this function calls the |func| with the
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* next entry. If the |func| returns nonzero, it will not call the
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* |func| for further entries and return the return value of the
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* |func| immediately. Thus, this function returns 0 if all the
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* invocations of the |func| return 0, or nonzero value which the last
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* invocation of |func| returns.
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*
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* Don't use this function to free each entry. Use
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* nghttp2_map_each_free() instead.
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*/
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int nghttp2_map_each(nghttp2_map *map,
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int (*func)(nghttp2_map_entry *entry, void *ptr),
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void *ptr);
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#endif /* NGHTTP2_MAP_H */
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