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
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
|
/*
** Zabbix
** Copyright (C) 2001-2014 Zabbix SIA
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
**/
#include "common.h"
#include "ipc.h"
#include "log.h"
#include "zbxalgo.h"
#include "memalloc.h"
#include "strpool.h"
extern char *CONFIG_FILE;
static zbx_strpool_t strpool;
static zbx_hash_t __strpool_hash_func(const void *data);
static int __strpool_compare_func(const void *d1, const void *d2);
ZBX_MEM_FUNC_DECL(__strpool);
#define INIT_HASHSET_SIZE 1000
#define REFCOUNT_FIELD_SIZE sizeof(uint32_t)
/* private strpool functions */
static zbx_hash_t __strpool_hash_func(const void *data)
{
return ZBX_DEFAULT_STRING_HASH_FUNC((char *)data + REFCOUNT_FIELD_SIZE);
}
static int __strpool_compare_func(const void *d1, const void *d2)
{
return strcmp((char *)d1 + REFCOUNT_FIELD_SIZE, (char *)d2 + REFCOUNT_FIELD_SIZE);
}
ZBX_MEM_FUNC_IMPL(__strpool, strpool.mem_info);
/* public strpool interface */
void zbx_strpool_create(size_t size)
{
const char *__function_name = "zbx_strpool_create";
key_t shm_key;
zabbix_log(LOG_LEVEL_DEBUG, "In %s()", __function_name);
if (-1 == (shm_key = zbx_ftok(CONFIG_FILE, ZBX_IPC_STRPOOL_ID)))
{
zabbix_log(LOG_LEVEL_CRIT, "cannot create IPC key for string pool");
exit(FAIL);
}
zbx_mem_create(&strpool.mem_info, shm_key, ZBX_NO_MUTEX, size, "string pool", "CacheSize", 0);
strpool.hashset = __strpool_mem_malloc_func(NULL, sizeof(zbx_hashset_t));
zbx_hashset_create_ext(strpool.hashset, INIT_HASHSET_SIZE,
__strpool_hash_func, __strpool_compare_func,
__strpool_mem_malloc_func, __strpool_mem_realloc_func, __strpool_mem_free_func);
zabbix_log(LOG_LEVEL_DEBUG, "End of %s()", __function_name);
}
void zbx_strpool_destroy()
{
const char *__function_name = "zbx_strpool_destroy";
zabbix_log(LOG_LEVEL_DEBUG, "In %s()", __function_name);
zbx_mem_destroy(strpool.mem_info);
zabbix_log(LOG_LEVEL_DEBUG, "End of %s()", __function_name);
}
const char *zbx_strpool_intern(const char *str)
{
void *record;
uint32_t *refcount;
record = zbx_hashset_search(strpool.hashset, str - REFCOUNT_FIELD_SIZE);
if (NULL == record)
{
record = zbx_hashset_insert_ext(strpool.hashset, str - REFCOUNT_FIELD_SIZE,
REFCOUNT_FIELD_SIZE + strlen(str) + 1, REFCOUNT_FIELD_SIZE);
*(uint32_t *)record = 0;
}
refcount = (uint32_t *)record;
(*refcount)++;
return (char *)record + REFCOUNT_FIELD_SIZE;
}
const char *zbx_strpool_acquire(const char *str)
{
uint32_t *refcount;
refcount = (uint32_t *)(str - REFCOUNT_FIELD_SIZE);
(*refcount)++;
return str;
}
void zbx_strpool_release(const char *str)
{
uint32_t *refcount;
refcount = (uint32_t *)(str - REFCOUNT_FIELD_SIZE);
if (0 == --(*refcount))
zbx_hashset_remove(strpool.hashset, str - REFCOUNT_FIELD_SIZE);
}
void zbx_strpool_clear()
{
const char *__function_name = "zbx_strpool_clear";
zabbix_log(LOG_LEVEL_DEBUG, "In %s()", __function_name);
zbx_mem_clear(strpool.mem_info);
strpool.hashset = __strpool_mem_malloc_func(NULL, sizeof(zbx_hashset_t));
zbx_hashset_create_ext(strpool.hashset, INIT_HASHSET_SIZE,
__strpool_hash_func, __strpool_compare_func,
__strpool_mem_malloc_func, __strpool_mem_realloc_func, __strpool_mem_free_func);
zabbix_log(LOG_LEVEL_DEBUG, "End of %s()", __function_name);
}
const zbx_strpool_t *zbx_strpool_info()
{
return &strpool;
}
|