1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
|
/* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef CACHE_CACHE_H
#define CACHE_CACHE_H
#ifdef __cplusplus
extern "C" {
#endif
#include "mod_cache.h"
/**
* @file cache_hash.h
* @brief Cache Cache Functions
*/
/**
* @defgroup Cache_cache Cache Functions
* @ingroup CACHE
* @{
*/
/** ADT for the cache */
typedef struct cache_cache_t cache_cache_t;
/** callback to increment the frequency of a item */
typedef void cache_cache_inc_frequency(void*a);
/** callback to get the size of a item */
typedef apr_size_t cache_cache_get_size(void*a);
/** callback to get the key of a item */
typedef const char* cache_cache_get_key(void *a);
/** callback to free an entry */
typedef void cache_cache_free(void *a);
/**
* initialize the cache ADT
* @param max_entries the number of entries in the cache
* @param max_size the size of the cache
* @param get_pri callback to get a priority of a entry
* @param set_pri callback to set a priority of a entry
* @param get_pos callback to get the position of a entry in the cache
* @param set_pos callback to set the position of a entry in the cache
* @param inc_entry callback to increment the frequency of a entry
* @param size_entry callback to get the size of a entry
* @param key_entry callback to get the key of a entry
* @param free_entry callback to free an entry
*/
CACHE_DECLARE(cache_cache_t *)cache_init(int max_entries,
apr_size_t max_size,
cache_pqueue_get_priority get_pri,
cache_pqueue_set_priority set_pri,
cache_pqueue_getpos get_pos,
cache_pqueue_setpos set_pos,
cache_cache_inc_frequency *inc_entry,
cache_cache_get_size *size_entry,
cache_cache_get_key *key_entry,
cache_cache_free *free_entry);
/**
* free up the cache
* @param c the cache
*/
CACHE_DECLARE(void) cache_free(cache_cache_t *c);
/**
* find a entry in the cache, incrementing the frequency if found
* @param c the cache
* @param key the key
*/
CACHE_DECLARE(void*) cache_find(cache_cache_t* c, const char *key);
/**
* insert a entry into the cache
* @param c the cache
* @param entry the entry
*/
CACHE_DECLARE(void) cache_update(cache_cache_t* c, void *entry);
/**
* insert a entry into the cache
* @param c the cache
* @param entry the entry
*/
CACHE_DECLARE(void) cache_insert(cache_cache_t* c, void *entry);
/**
* pop the lowest priority item off
* @param c the cache
* @returns the entry or NULL
*/
CACHE_DECLARE(void *)cache_pop(cache_cache_t* c);
/**
* remove an item from the cache
* @param c the cache
* @param entry the actual entry (from a find)
*/
CACHE_DECLARE(apr_status_t) cache_remove(cache_cache_t* c, void *entry);
/** @} */
#ifdef __cplusplus
}
#endif
#endif /* !CACHE_CACHE_H */
|
